The MAX7319 2-wire serial-interfaced peripheral features eight input ports with selectable internal pullups, overvoltage protection to +6V, and transition detection with interrupt output.All input ports are continuously monitored for state changes (transition detection). Transitions are latched, allowing detection of transient changes. Any combination of inputs can be selected using the interrupt mask to assert the active-low INT output. When the MAX7319 is subsequently accessed through the serial interface, any pending interrupt is cleared.The +5.5V tolerant active-low RST input clears the serial interface, terminating any I²C communication to or from the MAX7319.The MAX7319 uses two address inputs with four-level logic to allow 16 I²C slave addresses. The slave address also enables or disables internal 40kΩ pullups in groups of four ports.The MAX7319 supports hot insertion. All eight input ports, the serial interface SDA, SCL, AD0, AD2, active-low INT, and active-low RST remain high impedance in power-down (V+ = 0) with up to +6V asserted on them.The MAX7319 is one device in a family of pin-compatible port expanders with a choice of input ports, open-drain I/O ports, and push-pull output ports.The MAX7319 is available in 16-pin QSOP and 16-pin TQFN packages, and is specified over the automotive temperature range (-40°C to +125°C).ApplicationsCell PhonesNotebooksSAN/NASSatellite RadioServers

The MAX7320 2-wire serial-interfaced peripheral features eight push-pull outputs with selectable power-up logic states.The +5.5V tolerant active-low RST input clears the serial interface, terminating any I²C communication to or from the MAX7320.The MAX7320 uses two address inputs with four-level logic to allow 16 I²C slave addresses. The slave address also determines the power-up state level for the outputs in groups of four ports.The MAX7320 supports hot insertion. The serial interface SDA, SCL, AD0, AD2, and active-low RST remain high impedance in power-down (V+ = 0V) with up to +6V asserted on them.The MAX7320 is one device in a family of pin-compatible port expanders with a choice of input ports, open-drain I/O ports, and push-pull output ports.The MAX7320 is available in 16-pin QSOP and 16-pin TQFN packages, and is specified over the automotive temperature range (-40°C to +125°C).ApplicationsCell Phones/PDAsNotebooksRAIDSatellite RadiosServers

The MAX7322 2-wire serial-interfaced peripheral featuresfour push-pull outputs and four input ports with selectableinternal pullups. Input ports are overvoltage protected to+6V and feature transition detection with interrupt output.The four input ports are continuously monitored for statechanges (transition detection). The interrupt is latched,allowing detection of transient changes. Any combinationof inputs can be selected using the interrupt mask toassert the open-drain active-low INT output. When the MAX7322 issubsequently accessed through the serial interface, anypending interrupt is cleared.The four push-pull outputs are rated to sink 20mA, andare capable of driving LEDs.The active-low RST input clears the serial interface, terminating anyI²C communication to or from the MAX7322.The MAX7322 uses two address inputs with four-levellogic to allow 16 I²C slave addresses. The slave addressalso sets the power-up default logic state for the four outputports, and enables or disables internal 40kΩ pullups for the input ports.The MAX7322 is one device in a family of pin-compatibleport expanders with a choice of input ports, open-drainI/O ports, and push-pull output ports (see Table 1 in the full data sheet).The MAX7322 is available in 16-pin QSOP and TQFNpackages, and is specified over the -40°C to +125°Cautomotive temperature range.ApplicationsCell PhonesNotebooksSAN/NASSatellite RadioServers

The MAX7324 2-wire serial-interfaced peripheral features16 I/O ports that are divided into eight push-pulloutputs and eight inputs. Each input features selectableinternal pullups, overvoltage protection to +6V, andtransition detection with an interrupt output.All input ports are continuously monitored for statechanges (transition detection). The interrupt is latched,allowing detection of transient changes. Any combinationof inputs can be selected using the interrupt maskto assert the active-low INT output. When the MAX7324 is subsequentlyaccessed through the serial interface, anypending interrupt is cleared.The push-pull outputs are rated to sink 20mA and arecapable of driving LEDs. The active-low RST input clears the serialinterface, terminating any I²C communication to or fromthe MAX7324.The MAX7324 uses two address inputs with four-levellogic to allow 16 I²C slave addresses. The slaveaddress also enables or disables internal 40kΩ pullups in groups of four ports.The MAX7324 is one device in a family of pin-compatibleport expanders with a choice of input ports, open-drainI/O ports, and push-pull output ports (see Table 1 in the full data sheet).The MAX7324 is available in 24-pin QSOP and TQFNpackages, and is specified over the -40°C to +125°Cautomotive temperature range.ApplicationsCell PhonesNotebooksSAN/NASSatellite RadioServers

The MAX7324 2-wire serial-interfaced peripheral features16 I/O ports that are divided into eight push-pulloutputs and eight inputs. Each input features selectableinternal pullups, overvoltage protection to +6V, andtransition detection with an interrupt output.All input ports are continuously monitored for statechanges (transition detection). The interrupt is latched,allowing detection of transient changes. Any combinationof inputs can be selected using the interrupt maskto assert the active-low INT output. When the MAX7324 is subsequentlyaccessed through the serial interface, anypending interrupt is cleared.The push-pull outputs are rated to sink 20mA and arecapable of driving LEDs. The active-low RST input clears the serialinterface, terminating any I²C communication to or fromthe MAX7324.The MAX7324 uses two address inputs with four-levellogic to allow 16 I²C slave addresses. The slaveaddress also enables or disables internal 40kΩ pullups in groups of four ports.The MAX7324 is one device in a family of pin-compatibleport expanders with a choice of input ports, open-drainI/O ports, and push-pull output ports (see Table 1 in the full data sheet).The MAX7324 is available in 24-pin QSOP and TQFNpackages, and is specified over the -40°C to +125°Cautomotive temperature range.ApplicationsCell PhonesNotebooksSAN/NASSatellite RadioServers

The MAX7325 2-wire serial-interfaced peripheral features 16 I/O ports. Ports are divided into eight push-pull outputs and eight I/Os with selectable internal pullups and transition detection. Eight ports are push-pull outputs and eight I/Os may be used as a logic input or an open-drain output. Ports are overvoltage protected to +6V.All I/O ports configured as inputs are continuously monitored for state changes (transition detection). State changes are indicated by the active-low INT output. The interrupt is latched, allowing detection of transient changes. When the MAX7325 is subsequently accessed through the serial interface, any pending interrupt is cleared. The open-drain outputs are rated to sink 20mA, and are capable of driving LEDs. The active-low RST input clears the serial interface, terminating any I2C communication to or from the MAX7325.The MAX7325 uses two address inputs with four-level logic to allow 16 I2C slave addresses. The slave address also determines the power-up logic state for the I/O ports, and enables or disables internal 40kΩ pullups in groups of four ports.The MAX7325 is one device in a family of pin-compatible port expanders with a choice of input ports, open-drain I/O ports, and push-pull output ports (see Table 1 of the full data sheet).The MAX7325 is available in 24-pin QSOP and TQFN packages and is specified over the -40°C to +125°C automotive temperature range.ApplicationsAutomotiveCell PhonesNotebooksSAN/NASSatellite RadioServers

The MAX7325 2-wire serial-interfaced peripheral features 16 I/O ports. Ports are divided into eight push-pull outputs and eight I/Os with selectable internal pullups and transition detection. Eight ports are push-pull outputs and eight I/Os may be used as a logic input or an open-drain output. Ports are overvoltage protected to +6V.All I/O ports configured as inputs are continuously monitored for state changes (transition detection). State changes are indicated by the active-low INT output. The interrupt is latched, allowing detection of transient changes. When the MAX7325 is subsequently accessed through the serial interface, any pending interrupt is cleared. The open-drain outputs are rated to sink 20mA, and are capable of driving LEDs. The active-low RST input clears the serial interface, terminating any I2C communication to or from the MAX7325.The MAX7325 uses two address inputs with four-level logic to allow 16 I2C slave addresses. The slave address also determines the power-up logic state for the I/O ports, and enables or disables internal 40kΩ pullups in groups of four ports.The MAX7325 is one device in a family of pin-compatible port expanders with a choice of input ports, open-drain I/O ports, and push-pull output ports (see Table 1 of the full data sheet).The MAX7325 is available in 24-pin QSOP and TQFN packages and is specified over the -40°C to +125°C automotive temperature range.ApplicationsAutomotiveCell PhonesNotebooksSAN/NASSatellite RadioServers

The MAX7325 2-wire serial-interfaced peripheral features 16 I/O ports. Ports are divided into eight push-pull outputs and eight I/Os with selectable internal pullups and transition detection. Eight ports are push-pull outputs and eight I/Os may be used as a logic input or an open-drain output. Ports are overvoltage protected to +6V.All I/O ports configured as inputs are continuously monitored for state changes (transition detection). State changes are indicated by the active-low INT output. The interrupt is latched, allowing detection of transient changes. When the MAX7325 is subsequently accessed through the serial interface, any pending interrupt is cleared. The open-drain outputs are rated to sink 20mA, and are capable of driving LEDs. The active-low RST input clears the serial interface, terminating any I2C communication to or from the MAX7325.The MAX7325 uses two address inputs with four-level logic to allow 16 I2C slave addresses. The slave address also determines the power-up logic state for the I/O ports, and enables or disables internal 40kΩ pullups in groups of four ports.The MAX7325 is one device in a family of pin-compatible port expanders with a choice of input ports, open-drain I/O ports, and push-pull output ports (see Table 1 of the full data sheet).The MAX7325 is available in 24-pin QSOP and TQFN packages and is specified over the -40°C to +125°C automotive temperature range.ApplicationsAutomotiveCell PhonesNotebooksSAN/NASSatellite RadioServers

The MAX7328/MAX7329 are 2-wire serial-interfaced peripherals with eight I/O ports. Any port can be used as a logic input or an open-drain output.All input ports are continuously monitored for state changes (transition detection). Transitions are alerted through the open-drain, 5.5V-tolerant active-low INT output.The MAX7328 and MAX7329 versions differ only by their slave ID address ranges. The MAX7328 has a slave ID range of 0100xxx (0x20 to 0x27). The MAX7329 has a slave ID range of 0111xxx (0x38 to 0x3F).For a similar part with overvoltage-protected I/Os and a bus active-low RST input that clears the I²C serial interface, refer to the MAX7321 data sheet. The MAX7328/MAX7329 are members of a family of pin-compatible port expanders with a choice of input ports, open-drain I/O ports, and push-pull output ports (see the Selector Guide in the full data sheet).ApplicationsIndustrialNotebooksRAIDServers

The MAX7328/MAX7329 are 2-wire serial-interfaced peripherals with eight I/O ports. Any port can be used as a logic input or an open-drain output.All input ports are continuously monitored for state changes (transition detection). Transitions are alerted through the open-drain, 5.5V-tolerant active-low INT output.The MAX7328 and MAX7329 versions differ only by their slave ID address ranges. The MAX7328 has a slave ID range of 0100xxx (0x20 to 0x27). The MAX7329 has a slave ID range of 0111xxx (0x38 to 0x3F).For a similar part with overvoltage-protected I/Os and a bus active-low RST input that clears the I²C serial interface, refer to the MAX7321 data sheet. The MAX7328/MAX7329 are members of a family of pin-compatible port expanders with a choice of input ports, open-drain I/O ports, and push-pull output ports (see the Selector Guide in the full data sheet).ApplicationsIndustrialNotebooksRAIDServers

The MAX7367/MAX7368/MAX7369 bidirectional, four-channel I²C switches/multiplexer expand the main I²C bus up to four extended buses. The MAX7369 1:4 multiplexer connects the main I²C bus to one channelat a time. The MAX7367/MAX7368 four-channel switches connect the main I²C bus to one or more channels at a time.These devices isolate bus loading by extending the I²C bus onto different channels. The MAX7367/MAX7368/MAX7369 allow more devices to be interconnected to a master controller and multiple devices with the same I²C address to communicate to a master. The channels are selected through the main I²C bus by writing to the internal control register of the device.Any device connected to an I²C bus can transmit and receive signals. The MAX7367/MAX7368/MAX7369 are transparent to signals sent and received at each channel, allowing multiple masters. These devices are compatible with the I²C protocol of clock stretch, synchronization, and arbitration in case multiple masters address the bus at the same time.All devices are set to the default state during initial power-up. The MAX7367/MAX7368 have an active-low RESET input allowing external circuitry to set the MAX7367/MAX7368 to its default state anytime after the device has powered up. The MAX7367/MAX7369 have interrupt inputs, allowing devices on the extended bus to send an interrupt signal to the master on the main bus.The MAX7367/MAX7369 are available in 20-pin TSSOP packages, and the MAX7368 is available in a 16-pin TSSOP package. All devices operate over the -40°C to+85°C extended temperature range.ApplicationsBase StationsCellular PhonesMultimedia ElectronicsPCsRAIDSAN/NASServers

The MAX8069 is a 1.2V temperature-compensated voltagereference. It uses the bandgap principle to achieveexcellent stability and low noise at reverse currents downto 60µA. The MAX8069 also features excellent stability,freedom from oscillation. The MAX8069 is a functionalalternative to Maxim's ICL8069 with an identical pinout.ApplicationsAnalog-to-Digital ConvertersDigital-to-Analog ConvertersPortable InstrumentsThreshold DetectorsVoltage Regulators

The MAX8581/MAX8582 high-frequency step-down converters are optimized for dynamically powering the power amplifier (PA) in CDMA handsets. They integrate a high-efficiency PWM step-down converter for medium- and low-power transmission and a 60mΩ (typ) bypass mode to power the PA directly from the battery during high-power transmission. They use an analog input driven by an external DAC to control the output voltage linearly for continuous PA power adjustment. The MAX8581/MAX8582 use an internal feedback network, and the switching frequency is internally set to 2.5MHz and 1.5MHz, respectively.Fast switching (up to 2.5MHz) and fast soft-start allowthe use of ceramic 2.2µF input and output capacitors while maintaining low voltage ripple. The small 1.5µH to 3.3µH inductor size can be optimized for efficiency.The MAX8581/MAX8582 are available in 10-pin, 3mm x3mm TDFN packages (0.8mm max height).ApplicationsWCDMA/NCDMA Cell PhonesWireless PDAs, Smartphones

The MAX8614A/MAX8614B dual-output step-up DC-DCconverters generate both a positive and negative supplyvoltage that are each independently regulated. Thepositive output delivers up to 50mA while the invertersupplies up to 100mA with input voltages between 2.7Vand 5.5V. The MAX8614A/MAX8614B are ideal for poweringCCD imaging devices and displays in digitalcameras and other portable equipment.The MAX8614A/MAX8614B generate an adjustablepositive output voltage up to +24V and a negative outputdown to 16V below the input voltage. TheMAX8614B has a higher current limit than theMAX8614A. Both devices operate at a fixed 1MHz frequencyto ease noise filtering in sensitive applicationsand to reduce external component size.Additional features include pin-selectable power-onsequencing for use with a wide variety of CCDs, TrueShutdown™, overload protection, fault flag, and internalsoft-start with controlled inrush current.The MAX8614A/MAX8614B are available in a spacesaving3mm x 3mm 14-pin TDFN package andare specified over the -40°C to +85°C extendedtemperature range.ApplicationsCamcorders and Portable MultimediaCCD Bias Supplies and OLED DisplaysDigital CamerasPDAs and Smartphones

The MAX8614A/MAX8614B dual-output step-up DC-DCconverters generate both a positive and negative supplyvoltage that are each independently regulated. Thepositive output delivers up to 50mA while the invertersupplies up to 100mA with input voltages between 2.7Vand 5.5V. The MAX8614A/MAX8614B are ideal for poweringCCD imaging devices and displays in digitalcameras and other portable equipment.The MAX8614A/MAX8614B generate an adjustablepositive output voltage up to +24V and a negative outputdown to 16V below the input voltage. TheMAX8614B has a higher current limit than theMAX8614A. Both devices operate at a fixed 1MHz frequencyto ease noise filtering in sensitive applicationsand to reduce external component size.Additional features include pin-selectable power-onsequencing for use with a wide variety of CCDs, TrueShutdown™, overload protection, fault flag, and internalsoft-start with controlled inrush current.The MAX8614A/MAX8614B are available in a spacesaving3mm x 3mm 14-pin TDFN package andare specified over the -40°C to +85°C extendedtemperature range.ApplicationsCamcorders and Portable MultimediaCCD Bias Supplies and OLED DisplaysDigital CamerasPDAs and Smartphones

The MAX8633–MAX8636 offer low-dropout (LDO) voltage and ultra-low-power regulation in a subminiaturized 2mm x 2mm µDFN package. The devices operate from a 2.7V to 5.5V supply and deliver up to 300mA from each output, with a typical dropout voltage of 90mV at 100mA load current. Each device is designed with internal p-channel MOSFET pass transistors to ensure a low-quiescent supply current of 54µA (typical, both LDOs on). Other features include low-noise operation (MAX8634/MAX8636), output current limiting, and thermal shutdown.The MAX8633 features an open-drain, active-low RESET output to monitor OUT2, eliminating external components and adjustments. The MAX8633 asserts an active-low RESET signal (120ms minimum timeout) when VOUT2 drops below 87% of the nominal output voltage. The MAX8634/MAX8636 feature a noise bypass input to the internal reference for low output noise (45µVRMS typ). The MAX8634/MAX8635 provide independent active-low SHDN inputs for disabling the regulators, while the MAX8633/MAX8636 provide a single active-low SHDN input for disabling both regulators.The MAX8633/MAX8635/MAX8636 have two logic inputs that select one of nine preset output-voltage combinations, eliminating external 1% resistors, as well as inventory burden. The MAX8634 has one logic input to select three output-voltage options.The MAX8633–MAX8636 are available in an 8-pin, 2mm x 2mm µDFN package for minimizing footprint, and an 8-pin, 3mm x 3mm TDFN package for higher power dissipation. The devices are specified over the extendedtemperature range (-40°C to +85°C). All packages are lead free.ApplicationsCellular and Cordless PhonesHandheld InstrumentsNotebook ComputersPDAs and Digital CamerasSmall LCD DisplaysWireless LAN Cards

The MAX8633–MAX8636 offer low-dropout (LDO) voltage and ultra-low-power regulation in a subminiaturized 2mm x 2mm µDFN package. The devices operate from a 2.7V to 5.5V supply and deliver up to 300mA from each output, with a typical dropout voltage of 90mV at 100mA load current. Each device is designed with internal p-channel MOSFET pass transistors to ensure a low-quiescent supply current of 54µA (typical, both LDOs on). Other features include low-noise operation (MAX8634/MAX8636), output current limiting, and thermal shutdown.The MAX8633 features an open-drain, active-low RESET output to monitor OUT2, eliminating external components and adjustments. The MAX8633 asserts an active-low RESET signal (120ms minimum timeout) when VOUT2 drops below 87% of the nominal output voltage. The MAX8634/MAX8636 feature a noise bypass input to the internal reference for low output noise (45µVRMS typ). The MAX8634/MAX8635 provide independent active-low SHDN inputs for disabling the regulators, while the MAX8633/MAX8636 provide a single active-low SHDN input for disabling both regulators.The MAX8633/MAX8635/MAX8636 have two logic inputs that select one of nine preset output-voltage combinations, eliminating external 1% resistors, as well as inventory burden. The MAX8634 has one logic input to select three output-voltage options.The MAX8633–MAX8636 are available in an 8-pin, 2mm x 2mm µDFN package for minimizing footprint, and an 8-pin, 3mm x 3mm TDFN package for higher power dissipation. The devices are specified over the extendedtemperature range (-40°C to +85°C). All packages are lead free.ApplicationsCellular and Cordless PhonesHandheld InstrumentsNotebook ComputersPDAs and Digital CamerasSmall LCD DisplaysWireless LAN Cards

The MAX8640Y/MAX8640Z step-down converters areoptimized for applications where small size, high efficiency,and low output ripple are priorities. They utilizea proprietary PWM control scheme that optimizes theswitching frequency for high efficiency with small externalcomponents and maintains low output ripple voltageat all loads. The MAX8640Z switches at up to4MHz to allow a tiny 1µH inductor and 2.2µF outputcapacitor. The MAX8640Y switches at up to 2MHz forhigher efficiency while still allowing small 2.2µH and4.7µF components. Output current is guaranteed up to500mA, while typical quiescent current is 28µA.Factory-preset output voltages from 0.8V to 2.5V eliminateexternal feedback components.Internal synchronous rectification greatly improves efficiencyand replaces the external Schottky diode required in conventional step-down converters. Internal fast soft-start eliminates inrush current so as to reduceinput capacitor requirements.The MAX8640Y/MAX8640Z are available in the tiny 6-pin, SC70 (2.0mm x 2.1mm) and µDFN (1.5mm x 1.0mm) packages. Both packages are lead-free.ApplicationsCell Phones, PDAs, DSCs, MP3sI/O PowerMicroprocessor/DSP Core PowerOther Handhelds Where Space Is Limited

The MAX8640Y/MAX8640Z step-down converters areoptimized for applications where small size, high efficiency,and low output ripple are priorities. They utilizea proprietary PWM control scheme that optimizes theswitching frequency for high efficiency with small externalcomponents and maintains low output ripple voltageat all loads. The MAX8640Z switches at up to4MHz to allow a tiny 1µH inductor and 2.2µF outputcapacitor. The MAX8640Y switches at up to 2MHz forhigher efficiency while still allowing small 2.2µH and4.7µF components. Output current is guaranteed up to500mA, while typical quiescent current is 28µA.Factory-preset output voltages from 0.8V to 2.5V eliminateexternal feedback components.Internal synchronous rectification greatly improves efficiencyand replaces the external Schottky diode required in conventional step-down converters. Internal fast soft-start eliminates inrush current so as to reduceinput capacitor requirements.The MAX8640Y/MAX8640Z are available in the tiny 6-pin, SC70 (2.0mm x 2.1mm) and µDFN (1.5mm x 1.0mm) packages. Both packages are lead-free.ApplicationsCell Phones, PDAs, DSCs, MP3sI/O PowerMicroprocessor/DSP Core PowerOther Handhelds Where Space Is Limited

The MAX8643 high-efficiency switching regulator delivers up to 3A load current at output voltages from 0.6V to (0.9 × VIN).The IC operates from 2.35V to 3.6V, making it ideal for on-board point-of-load and postregulation applications. Total output error is less than ±1% over load, line, and temperature.The MAX8643 features fixed-frequency PWM mode operation with a switching frequency range of 500kHz to 2MHz set by an external resistor. High-frequencyoperation allows for an all-ceramic capacitor design. The high operating frequency also allows for small-size external components.The low-resistance on-chip nMOS switches ensure high efficiency at heavy loads while minimizing critical inductances, making the layout a much simpler task with respect to discrete solutions. Following a simple layout and footprint ensures first-pass success in new designs.The MAX8643 comes with a high-bandwidth (> 14MHz) voltage-error amplifier. The voltage-mode control architecture and the voltage-error amplifier permit a type III compensation scheme to be utilized to achieve maximum loop bandwidth, up to 20% of the switching frequency. High loop bandwidth provides fast transientresponse, resulting in less required output capacitance and allowing for all-ceramic capacitor designs.The MAX8643 provides two tri-state logic inputs to select one of nine preset output voltages. The preset output voltages allow customers to achieve ±1% output-voltage accuracy without using expensive 0.1% resistors. In addition, the output voltage can be set to any customer value by either using two external resistors at the feedback with 0.6V internal reference orapplying an external reference voltage to the REFIN input. The MAX8643 offers programmable soft-start time using one capacitor to reduce input inrush current.The MAX8643 is available in a lead-free, 24-pin, 4mm x 4mm thin QFN package.For assistance with selecting appropriate capacitors, resistors, and inductors, try our online component selection spreadsheet.ApplicationsASIC/CPU/DSP Core and I/O VoltagesBase-Station Power SuppliesDDR Power SuppliesPOLsRAID Control Power SuppliesTelecom and Networking Power Supplies