N74F269 Просмотр технического описания (PDF) - Philips Electronics
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N74F269 Datasheet PDF : 14 Pages
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Philips Semiconductors
8–bit bidirectional binary counter
Product specification
74F269
AC WAVEFORMS
For all waveforms, VM = 1.5V.
The shaded areas indicate when the input is permitted to change for predictable output performance.
1/fMAX
CP
VM
VM
VM
tW(H)
tPLH
tW(L)
tPHL
VM
Qn
tPHL
VM
tPLH
TC
VM
VM
SF00791A
Waveform 1. Propagation Delay, Clock Input to Output,
Clock Pulse Width, and Maximum Clock Frequency
CET
TC
VM
VM
tPHL
tPLH
VM
VM
SF00792
Waveform 2. Propagation Delay,
CET Input to Terminal Count Output
U/D
TC
VM
VM
tPHL
tPLH
VM
VM
SF00793
Waveform 3. Propagation Delay, Up/Down Count Control Input
to Terminal Count Output
CET
CEP
CP
VM
VM
ts(L)
th(L)
VM
VM
VM
ts(H)
th(H)
VM
Pn
VM
VM
ts
th
PE
VM
VM
ts(L)
th = 0
VM
VM
ts(H)
th = 0
CP
VM
VM
SF00844
Waveform 4. Parallel Data and Parallel Enable
Setup and Hold Times
U/D
VM
VM
ts(L)
th
CP
VM
VM
VM
ts(H)
th
VM
Qn
COUNT
NO CHANGE
SF00842
Waveform 5. Count Enables Setup and Hold Times
Qn
COUNT DOWN
COUNT UP
SF00839
Waveform 6. Up/Down Count Control Setup and Hold Times
1996 Jan 05
8
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