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| 74F821 Datasheet, PDF (13/18 Pages) NXP Semiconductors – Bus interface registers | |||
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Philips Semiconductors
Bus interface registers
Product specification
74F821/822/823/824/825/826
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
tw(H)
tPLH
VM
tw(L)
VM
tPHL
Qn
VM
tPHL
Qn
VM
VM
tPLH
VM
SF00506
Waveform 1. Propagation delay for clock input to output,
clock pulse width, and maximum clock frequency
MR
CP
Qn, Qn
VM
VM
tw(L)
tPHL
VM
trec
VM
SF00507
Waveform 2. Master reset pulse width, master reset to output
delay and master reset to clock recovery time
Dn, CE
CP
VM
VM
tsu(H) th(H)
VM
VM
tsu(L)
VM
th(L)
VM
SF00508
Waveform 3. Data setup time and hold times
OEn
Qn, Qn
VM
tPZH
VM
tPHZ
VM
VOH -0.3V
0V
SF00509
Waveform 4. 3-State output enable time to high level and
output disable time from high level
OEn
VM
VM
Qn, Qn
tPZL
tPLZ
VM
3.5V
VOL +0.3V
SF00510
Waveform 5. 3-State output enable time to low level and
output disable time from low level
1996 Jan 05
13
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