ZHCSSC5E november 1988 – june 2023 SN74HCT257
PRODUCTION DATA
请参考 PDF 数据表获取器件具体的封装图。
PARAMETER | FROM (INPUT) |
TO (OUTPUT) |
VCC | TA = 25°C | SN54HCT257 | SN74HCT257 | UNIT | ||||
---|---|---|---|---|---|---|---|---|---|---|---|
MIN | TYP | MAX | MIN | MAX | MIN | MAX | |||||
tpd | A or B | Y | 4.5 V | 20 | 30 | 45 | 38 | ns | |||
5.5 V | 17 | 27 | 40 | 34 | |||||||
A/B | Y | 4.5 V | 20 | 30 | 45 | 38 | |||||
5.5 V | 17 | 27 | 40 | 34 | |||||||
en | OE | Y | 4.5 V | 20 | 30 | 45 | 38 | ns | |||
5.5 V | 17 | 27 | 40 | 34 | |||||||
tdis | OE | Y | 4.5 V | 20 | 30 | 45 | 38 | ns | |||
5.5 V | 17 | 27 | 40 | 34 | |||||||
tt | Any | 4.5 V | 8 | 15 | 22 | 19 | ns | ||||
5.5 V | 7 | 14 | 21 | 17 |