74HC401 데이터 시트보기 (PDF) - Philips Electronics

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74HC401

8-bit synchronous BCD down counter

Philips Electronics 

Philips Semiconductors

8-bit synchronous BCD down counter

AC WAVEFORMS

Product specification

74HC/HCT40102

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

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

Fig.7

Waveforms showing the clock input (CP) to

TC propagation delays, the clock pulse

width, the output transition times and the

maximum clock pulse frequency.

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

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

Fig.8 Waveforms showing the TE to

TC propagation delays.

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

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

Fig.9 Waveforms showing PL, MR, Pn to

TC propagation delays.

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

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

Fig.10 Waveforms showing removal time for

MR and PL.

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

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

Fig.11 Waveforms showing hold and set-up times

for MR or PE to CP.

The shaded areas indicate when the input is permitted to

change for predictable output performance.

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

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

Fig.12 Waveforms showing hold and set-up times

for Pn, PE to CP.

December 1990

10

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