74F579 데이터 시트보기 (PDF) - Philips Electronics

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74F579

8-bit bidirectional binary counter (3-State)

Philips Electronics 

Philips Semiconductors

8-bit bidirectional binary counter (3-State)

Product specification

74F579

AC WAVEFORMS

NOTE: For all waveforms VM = 1.5V.

The shaded areas indicate when the input is permitted to change for predictable output performance.

CP

I/On

TC

1/fMAX

VM

tW(H)

tPLH

VM

tPHL

tW(L)

VM

VM

tPHL

VM

tPLH

VM

MR

CP

I/On

VM

tW(L)

tPHL

VM

VM

trec

VM

SF01089

Waveform 1. Propagation Delay, Clock Input to Output,

Clock Pulse Width and Maximum Clock Frequency

SF01090

Waveform 2. Master Reset Pulse Width, Master Reset to

Output Delay and Master Reset to Clock Recovery Time

CET

TC

VM

tPHL

VM

VM

tPLH

VM

SF01091

Waveform 3. Propagation Delay, CET Input to

Terminal Count Output

MR, U/D

TC

VM

tPHL

VM

VM

tPLH

SF01092

Waveform 4. Propagation Delay, U/D and MR Inputs to

Terminal Count Output

PE, CS,

U/D, SR,

I/On, CEP,

CET

VM

VM

ts(H)

th(L)

VM VM

ts(L)

th(L)

CP

VM

VM

Waveform 5. Setup and Hold Times

SF01093

PE, OE,

CS

I/On

VM

tPZH

VM

tPHZ

VM

VOH -0.3V

SF01094

Waveform 6. 3-State Output Enable Time to High Level and

Output Disable Time from High Level

PE, OE,

CS

I/On

VM

tPZL

VM

tPLZ

VM

VOL +0.3V

SF01095

Waveform 7. 3-State Output Enable Time to Low Level and

Output Disable Time from Low Level

1992 May 04

9

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