| Distributor | SKU | Stock | Cost | |
|---|---|---|---|---|
| DigiKey | 296-3592-5-ND | 332 | $0.88 | Buy |
| DigiKey | 296-3592-5-ND | 320 | $0.88 | Buy |
| DigiKey | 296-42646-1-ND | 1875 | $0.94 | Buy |
| DigiKey | 2156-SN74F521DWR-ND | 12260 | $0.91 | Buy |
| DigiKey | 2156-SN74F521DWR-ND | 11245 | $0.68 | Buy |
| DigiKey | 296-33912-5-ND | 389 | $1.09 | Buy |
| DigiKey | 296-42646-1-ND | 1875 | $0.94 | Buy |
| Mouser Electronics | 595-SN74F521NSR | 1380 | $0.76 | Buy |
| Mouser Electronics | 595-SN74F521N | 1169 | $0.80 | Buy |
| Mouser Electronics | 595-SN74F521DWG4 | 0 | $0.32 | Buy |
| Mouser Electronics | 595-SN74F521DWRG4 | 0 | $0.29 | Buy |
| Mouser Electronics | 595-SN74F521DW | 276 | $0.81 | Buy |
| Mouser Electronics | 595-SN74F521DWR | 2161 | $0.68 | Buy |
| Win Source | SN74F521NSR | 1620 | $0.51 | Buy |
| AVNET Express | SN74F521NSR | 3450 | $0.30 | Buy |
| Arrow North American Components | SN74F521DWG4 | 0 | $0.33 | Buy |
| Arrow North American Components | SN74F521NSR | 0 | $0.45 | Buy |
| AVNET Express | SN74F521DWG4 | $0.30 | Buy | |
| Newark | SN74F521DWR | $0.28 | Buy | |
| Win Source | SN74F521DWR | 100 | $0.59 | Buy |
| AVNET Europe | SN74F521DWR | * $0.41 | Buy | |
| AVNET Express | SN74F521DWR | 13245 | $0.32 | Buy |
| Texas Instruments | SN74F521DWR | 6228 | $0.62 | Buy |
| Texas Instruments | SN74F521NSR | 22639 | $0.61 | Buy |
| Win Source | SN74F521DW | 102 | $0.37 | Buy |
| Newark | SN74F521N | 81 | $0.96 | Buy |
| Texas Instruments | SN74F521N | 14489 | $0.69 | Buy |
| Component Online | SN74F521N | 120 | $0.77 | Buy |
| AVNET Europe | SN74F521N | 600 | * $0.41 | Buy |
| AVNET Express | SN74F521N | 5113 | $0.32 | Buy |
| Farnell | SN74F521N | 81 | * $1.05 | Buy |
| element14 APAC | SN74F521N | 59 | * $1.24 | Buy |
| Quest Components | SN74F521N | 44 | $5.40 | Buy |
| Win Source | SN74F521N | 4610 | $0.89 | Buy |
| Texas Instruments | SN74F521DW | 14939 | $0.74 | Buy |
| Freelance | SN74F521DW | 840 | Buy | |
| Freelance | SN74F521N | 18 | Buy | |
| RS Components | SN74F521DW | $10.36 | Buy | |
| AVNET Europe | SN74F521DW | 175 | * $0.41 | Buy |
| AVNET Express | SN74F521DW | 21588 | $0.32 | Buy |
| Newark | SN74F521DW | $0.75 | Buy | |
| AVNET Express | SN74F521DWRG4 | $0.30 | Buy |
SN74F521 8-Bit Identity/Magnitude Comparators (P=Q) with Enable