74F191 데이터 시트보기 (PDF) - Philips Electronics
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74F191 Datasheet PDF : 14 Pages
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Philips Semiconductors
Up/Down binary counter with reset and ripple clock
Product specification
74F191
AC WAVEFORMS
NOTE: For all waveforms, VM = 1.5V
1/fMAX
CP
VM
tW(L)
VM
tW(H)
tPHL
tPLH
RC, Qn, TC
VM
VM
SF00734
Waveform 1. Propagation Delay, Clock Input to Output,
Clock Pulse Width, and Maximum Clock Frequency.
CE, CP
U/D
RC
VM
tPHL
VM
VM
tPLH
VM
SF00735
Waveform 2. Propagation Delay, Clock, Clock Enable or
Up/Down to Ripple Clock Output
Dn
RC, TC, Qn
VM
VM
tPLH
tPHL
VM
VM
SF00736
Waveform 3. Propagation Delay, Non-Inverting Path
PL
VM
VM
tW(L)
tREC
CP
VM
TC, Qn
tPLH
VM
tPHL
RC, Qn
VM
SF00738
Waveform 5. Parallel Load Pulse Width, Parallel Load to Output
Delay and Parallel Load to Clock Recovery Time
U/D, Dn
RC, TC
VM
tPHL
VM
tPLH
VM
VM
SF00737
Waveform 4. Propagation Delay, Inverting Path
CE,
Dn
U/D
PL
VM
tS(H)
VM
tS(L)
th(H)
th(L)
VM
CP
VM
VM
The shaded areas indicate when the input is permitted
to change for predictable output performance.
Waveform 6. Data Set Up and Hold Times
SF00739
1995 Jul 17
9
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