74HC648 查看數據表（PDF） - Philips Electronics

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74HC648

Octal bus transceiver/register; 3-state; inverting

Philips Electronics 

Philips Semiconductors

Octal bus transceiver/register; 3-state;

inverting

AC WAVEFORMS

Product specification

74HC/HCT648

(1) HC : VM = 50%; VI = GND to VCC.

HCT: VM = 1.3 V; VI = GND to 3 V.

Fig.6 Waveforms showing the input An, Bn to output Bn, An propagation delays and the output transition times.

(1) HC : VM = 50%; VI = GND to VCC.

HCT: VM = 1.3 V; VI = GND to 3 V.

Fig.7 Waveforms showing the An, Bn to CPAB, CPBA set-up and hold times, clock CPAB, CPBA pulse width,

maximum clock pulse frequency and the CPAB, CPBA to output Bn, An propagation delays.

(1) HC : VM = 50%; VI = GND to VCC.

HCT: VM = 1.3 V; VI = GND to 3 V.

Fig.8 Waveforms showing the input SAB, SBA to output Bn, An propagation delays and output transition times.

December 1990

9

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