Single PoE+ PSE Controller Features: Compliant with IEEE 802.3at Type 1 and 2 0.34Ω Total Channel Resistance 130mW/Port at 600mA Advanced Power Management 8-Bit Programmable Current Limit (ILIM) 7-Bit Programmable Overload Currents (ICUT) Fast Shutdown 14.5-Bit Port Current/Voltage Monitoring 2-Event Classification Very High Reliability 4-Point PD Detection 2-Point Forced Voltage 2-Point Forced Current High Capacitance Legacy Device Detection LTC4259A-1 and LTC4266 SW Compatible 1MHz I2C Compatible Serial Control Interface Midspan Backoff Timer Supports Proprietary Power Levels Above 25W Available in 38-Pin 5mm × 7mm QFN Package

High Current Hot Swap Controller with I2C Compatible Monitoring Features: Allows Safe Board Insertion Into Live Backplane 12-/16-Bit ADC with ±0.9% Total Unadjusted Error Monitors Current, Voltage, Power and Energy Controls Two Parallel N-Channel MOSFETs for SOA Sharing in High Current Applications Internal EEPROM for Nonvolatile Configuration Wide Operating Voltage Range: 2.9V to 33V I2C/SMBus Digital Interface (Coexists with PMBus Devices) 12V Gate Drive for Lower MOSFET RDS(ON) Programmable Current Limit with 2% Accuracy MOSFET Power Limiting with Current Foldback Continuously Monitors MOSFET Health Stores Minimum and Maximum Measurements Alerts When Alarm Thresholds Exceeded Input Overvoltage and Undervoltage Protection Internal ±5% or External Timebases 32-Pin 5mm × 5mm QFN Package AEC-Q100 Qualified for Automotive Applications

High Current Hot Swap Controller with I2C Compatible Monitoring Features: Allows Safe Board Insertion Into Live Backplane 12-/16-Bit ADC with ±0.9% Total Unadjusted Error Monitors Current, Voltage, Power and Energy Controls Two Parallel N-Channel MOSFETs for SOA Sharing in High Current Applications Internal EEPROM for Nonvolatile Configuration Wide Operating Voltage Range: 2.9V to 33V I2C/SMBus Digital Interface (Coexists with PMBus Devices) 12V Gate Drive for Lower MOSFET RDS(ON) Programmable Current Limit with 2% Accuracy MOSFET Power Limiting with Current Foldback Continuously Monitors MOSFET Health Stores Minimum and Maximum Measurements Alerts When Alarm Thresholds Exceeded Input Overvoltage and Undervoltage Protection Internal ±5% or External Timebases 32-Pin 5mm × 5mm QFN Package AEC-Q100 Qualified for Automotive Applications

Negative Voltage Hot Swap Controller with Energy Monitor Features: Allows Safe Insertion into Live –48V Backplanes Protects MOSFET with SOA Timer Programmable 15mV to 30mV Current Limit Sense Voltage with 8-Bit to 16-Bit Gear-Shift ADC with 0.7% Accuracy Monitors Voltages, Currents, Power and Energy Nonvolatile Configuration and Fault Recording Floating Topology for Rugged High Voltage Operation Selectable Inrush Control: dV/dt or Current Limit I2C/SMBus or Single-Wire Broadcast Interfaces Min/Max ADC Measurement Logging with Alerts Reboots on I2C Command with Programmable Delay Adjustable Input UV/OV Thresholds and Hysteresis 38-Pin 5mm × 7mm QFN Package

High Power Negative Voltage Hot Swap Controller with Energy Monitor Features: Drives Two Gates for High Power Applications Configurable Parallel, Staged Start or Single Modes Protects MOSFET with SOA Timer Programmable 15mV to 30mV Current Limit Sense Voltage with 8-Bit to 16-Bit Gear-Shift ADC with 0.7% Accuracy Monitors Voltages, Currents, Power and Energy Nonvolatile Configuration and Fault Recording Floating Topology for Rugged High Voltage Operation Selectable Inrush Control: dV/dt or Current Limit I2C/SMBus or Single-Wire Broadcast Interfaces Min/Max ADC Measurement Logging with Alerts Reboots on I2C Command with Programmable Delay Adjustable Input UV/OV Thresholds and Hysteresis 44-Pin 5mm × 8mm QFN Package

High Power Negative Voltage Hot Swap Controller with Energy Monitor Features: Drives Two Gates for High Power Applications Configurable Parallel, Staged Start or Single Modes Protects MOSFET with SOA Timer Programmable 15mV to 30mV Current Limit Sense Voltage with 8-Bit to 16-Bit Gear-Shift ADC with 0.7% Accuracy Monitors Voltages, Currents, Power and Energy Nonvolatile Configuration and Fault Recording Floating Topology for Rugged High Voltage Operation Selectable Inrush Control: dV/dt or Current Limit I2C/SMBus or Single-Wire Broadcast Interfaces Min/Max ADC Measurement Logging with Alerts Reboots on I2C Command with Programmable Delay Adjustable Input UV/OV Thresholds and Hysteresis 44-Pin 5mm × 8mm QFN Package

High Power Negative Voltage Hot Swap Controller with Energy Monitor Features: Drives Two Gates for High Power Applications Configurable Parallel, Staged Start or Single Modes Protects MOSFET with SOA Timer Programmable 15mV to 30mV Current Limit Sense Voltage with 8-Bit to 16-Bit Gear-Shift ADC with 0.7% Accuracy Monitors Voltages, Currents, Power and Energy Nonvolatile Configuration and Fault Recording Floating Topology for Rugged High Voltage Operation Selectable Inrush Control: dV/dt or Current Limit I2C/SMBus or Single-Wire Broadcast Interfaces Min/Max ADC Measurement Logging with Alerts Reboots on I2C Command with Programmable Delay Adjustable Input UV/OV Thresholds and Hysteresis 44-Pin 5mm × 8mm QFN Package

4-Port IEEE 802.3bt PoE PSE Controller Features: Four PSE Ports Two Power Channels per Port Low Power Path Dissipation per Channel 150mΩ Sense Resistance 30mΩ or Lower MOSFET RDS(ON) Chipset Provides Electrical Isolation Eliminates Optos and Isolated 3.3V Supply Very High Reliability Multipoint PD Detection Connection Check Distinguishes Single-Signature and Dual-Signature PDs Fully Compliant IEEE 802.3bt Type 3 and 4 PSE Compliant Support for Type 1, 2, 3, and 4 PDs Continuous, Dedicated Per-Port Power and Current Monitoring Per-Port Power Policing 1MHz I2C Compatible Serial Control Interface Pin or I2C Programmable PD Power Up to 71.3W Available in a 40-Lead 6mm × 6mm (LTC4292) and 24-Lead 4mm × 4mm (LTC4291-1) QFN Packages

Hot Swappable 2-Wire Bus Buffers Features: Bidirectional Buffer for SDA and SCL Lines Increases Fanout Prevents SDA and SCL Corruption During Live Board Insertion and Removal from Backplane Isolates Input SDA and SCL Lines from Output Compatible with I2C, I2C Fast Mode and SMBus Standards (Up to 400kHz Operation) Small MSOP 8-Pin Package Low ICC Chip Disable: <1µA (LTC4300A-1) READY Open Drain Output (LTC4300A-1) 1V Precharge on all SDA and SCL Lines Supports Clock Stretching, Arbitration and Synchronization 5V to 3.3V Level Translation (LTC4300A-2) High Impedance SDA, SCL Pins for VCC = 0V

Level Shifting Hot Swappable 2-Wire Bus Buffer with Enable Features:Bidirectional Buffer* for SDA and SCL Lines Increases FanoutPrevents SDA and SCL Corruption During Live Board Insertion and Removal From BackplaneLogic Threshold ENABLE InputIsolates Input SDA and SCL Lines from OutputCompatible with I2C, I2C Fast Mode and SMBus Standards (Up to 400kHz Operation)1V Precharge on all SDA and SCL LinesSupports Clock Stretching, Arbitration and Synchronization5V to 3.3V Level TranslationHigh Impedance SDA, SCL Pins for VCC = 0V, VCC2 = 0VSmall 8-Lead DFN and MSOP Packages

Hot Swappable 2-Wire Bus Buffer with Low Voltage Level Translation Features: Level Translates 1V Signals to Standard 3.3V and 5V Logic Rails Allows Bus Pull-Up Voltages as Low as 1V on SDAIN and SCLIN Bidirectional Buffer* for SDA and SCL Lines Increases Fanout Prevents SDA and SCL Corruption During Live Board Insertion and Removal from Backplane Isolates Input SDA and SCL Line from Output 10kV Human Body Model ESD Protection Supports Clock Stretching, Arbitration and Synchronization High Impedance SDA, SCL Pins for VCC = 0V CS Gates Connection from Input to Output Compatible with I2C™, I2C Fast Mode and SMBus Standards (Up to 400kHz Operation) Small 8-Pin MSOP and DFN (3mm x 3mm) Packages

Hot Swappable 2-Wire Bus Buffer with Low Voltage Level Translation Features: Level Translates 1V Signals to Standard 3.3V and 5V Logic Rails Allows Bus Pull-Up Voltages as Low as 1V on SDAIN and SCLIN Bidirectional Buffer* for SDA and SCL Lines Increases Fanout Prevents SDA and SCL Corruption During Live Board Insertion and Removal from Backplane Isolates Input SDA and SCL Line from Output 10kV Human Body Model ESD Protection Supports Clock Stretching, Arbitration and Synchronization High Impedance SDA, SCL Pins for VCC = 0V CS Gates Connection from Input to Output Compatible with I2C™, I2C Fast Mode and SMBus Standards (Up to 400kHz Operation) Small 8-Pin MSOP and DFN (3mm x 3mm) Packages

Hot Swappable 2-Wire Bus Buffer with Stuck Bus Recovery Features: Automatic Disconnect of SDA/SCL Lines when Bus is Stuck Low for ≥ 30ms Recovers Stuck Busses with Automatic Clocking* Bidirectional Buffer* for SDA and SCL Lines Increases Fanout Prevents SDA and SCL Corruption During Live Board Insertion and Removal from Backplane Pin Compatible with LTC4300A-1 ±15kV Human Body Model ESD Protection Isolates Input SDA and SCL Lines from Output Compatible with I2C™, I2C Fast-Mode and SMBus Standards (Up to 400kHz Operation) READY Open Drain Output 1V Precharge on All SDA and SCL Lines High Impedance SDA, SCL Pins for VCC = 0V ENABLE Gates Connection from Input to Output MSOP 8-Pin and DFN (3mm × 3mm) Packages

Hot Swappable 2-Wire Bus Buffer with Stuck Bus Recovery Features: Automatic Disconnect of SDA/SCL Lines when Bus is Stuck Low for ≥30ms Fault Flag for Stuck Bus Recovers Stuck Busses with Automatic Clocking* Bidirectional Buffer* for SDA and SCL Lines Increases Fanout Prevents SDA and SCL Corruption During Live Board Insertion and Removal from Backplane Allows Bus Pullup Voltages Above and Below VCC ±15kV Human Body Model ESD Protection Isolates Input SDA and SCL Lines from Output Compatible with I2C™, I2C Fast-Mode and SMBus Standards (Up to 400kHz Operation) READY Open Drain Output 1V Precharge on All SDA and SCL Lines High Impedance SDA, SCL Pins for VCC = 0V ENABLE Gates Connection from Input to Output MSOP 10-Pin and DFN (3mm × 3mm) Packages

2-Channel, 2-Wire Bus Multiplexer with Capacitance Buffering Features: 1:2 2-Wire Multiplexer/Switch Connect SDA and SCL Lines with 2-Wire Bus Commands Supply Independent Bidirectional Buffer for SDA and SCL Lines Increases Fan-Out Programmable Disconnect from Stuck Bus Compatible with I2C and SMBus Standards Rise Time Accelerator Circuitry SMBus Compatible ALERT Response Protocol Prevents SDA and SCL Corruption During Live Board Insertion and Removal from Backplane ±10kV Human Body Model ESD Ruggedness 16-Lead (4mm × 5mm) DFN and SSOP Packages

Low Offset Hot Swappable 2-Wire Bus Buffer with Stuck Bus Recovery Features: Bidirectional Buffer with Stuck Bus Recovery 60mV Buffer Offset Independent of Load 30ms Stuck Bus Timeout Compatible with Non-Compliant VOL I2C Devices Prevents SDA and SCL Corruption During Live Board Insertion and Removal from Backplane ±5kV Human Body Model ESD Protection Isolates Input SDA and SCL Line from Output Compatible with I2C™, I2C Fast Mode and SMBus READY Open-Drain Output 1V Precharge on All SDA and SCL Lines High Impedance SDA, SCL Pins for VCC = 0V Small 8-Lead (3mm × 3mm) DFN and 8-Lead MSOP Packages

Low Offset Hot Swappable 2-Wire Bus Buffer with Stuck Bus Recovery Features: Bidirectional Buffer with Stuck Bus Recovery 60mV Buffer Offset Independent of Load 30ms Stuck Bus Timeout Compatible with Non-Compliant VOL I2C Devices Prevents SDA and SCL Corruption During Live Board Insertion and Removal from Backplane ±5kV Human Body Model ESD Protection Isolates Input SDA and SCL Line from Output Compatible with I2C™, I2C Fast Mode and SMBus READY Open-Drain Output 1V Precharge on All SDA and SCL Lines High Impedance SDA, SCL Pins for VCC = 0V Small 8-Lead (3mm × 3mm) DFN and 8-Lead MSOP Packages

High Definition Multimedia Interface (HDMI) Level-Shifting 2-Wire Bus Buffer Features: Bidirectional Buffer for Display Data Channel (DDC) Compliant with HDMI Specifi cation Version 1.3 DDC Capacitance Requirement Level Translation Between 3.3V and 5V ±5kV Human Body Model ESD Protection 60mV Buffer Offset Independent of Load Compatible with Non-Compliant VOL I2C Devices Isolates Input SDA and SCL Line from Output Compatible with I2C™, I2C Fast Mode and SMBus READY Open-Drain Output High Impedance SDA, SCL Pins for VCC = 0V Small 8-Lead (3mm × 3mm) DFN and 8-Lead MSOP Packages

Low Offset Hot Swappable 2-Wire Bus Buffer with Stuck Bus Recovery Features: Bidirectional Buffer with Stuck Bus Recovery 60mV Buffer Offset Independent of Load 30ms Stuck Bus Timeout Compatible with Non-Compliant VOL I2C Devices Prevents SDA and SCL Corruption During Live Board Insertion and Removal from Backplane ±5kV Human Body Model ESD Protection Isolates Input SDA and SCL Line from Output Compatible with I2C™, I2C Fast Mode and SMBus READY Open-Drain Output 1V Precharge on All SDA and SCL Lines High Impedance SDA, SCL Pins for VCC = 0V Small 8-Lead (3mm × 3mm) DFN and 8-Lead MSOP Packages

High Definition Multimedia Interface (HDMI) Level-Shifting 2-Wire Bus Buffer Features: Bidirectional Buffer for Display Data Channel (DDC) Compliant with HDMI Specifi cation Version 1.3 DDC Capacitance Requirement Level Translation Between 3.3V and 5V ±5kV Human Body Model ESD Protection 60mV Buffer Offset Independent of Load Compatible with Non-Compliant VOL I2C Devices Isolates Input SDA and SCL Line from Output Compatible with I2C™, I2C Fast Mode and SMBus READY Open-Drain Output High Impedance SDA, SCL Pins for VCC = 0V Small 8-Lead (3mm × 3mm) DFN and 8-Lead MSOP Packages