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Description
Nov 21, 2012 Updated Table 10 (removed 74HC257 device, 74HCT257 replaced by 74VHCT257 device). Updated Section 7: Package information, added Feb 18, 1999 74HC257 . /KV1. /KV2. /KV3. /CS2. A0. J3. /KV4. /KV5. D[0:7]. MUX. MUX to LEDs to buzzer. } 1 2 3 4 5 6 7 8 9 10. H2 menu item field up down. 10 nF. 10 k . 22 k . Vcc. DIGIN. DIGIN. INPUT PULLED UP. INPUT PULLED DOWN. 74HC257 . MULTIPLEXER. FD. CPU card. CPU card. Factory. Default. C28. circuitry not battery-backed has long since ceased functioning. /PFI. /PFO. /NMI. DCIN. +5V. R1. R2. IC691. Micro- processor. R4. D6. 3B. 3Y. 74HC257 . U18.
| Part Number | 74HC257 |
| Brand | Texas Instruments |
| Image |  |
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