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| 74ABT845 Datasheet, PDF (6/7 Pages) NXP Semiconductors – 8-bit bus interface latch with set and reset 3-State | |||
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Philips Semiconductors
8-bit bus interface latch with set and reset
(3-State)
Product specification
74ABT845
AC WAVEFORMS
NOTE: For all waveforms, VM = 1.5V.
PRE
MR, Dn
Qn
VM
tPLH
VM
VM
tPHL
VM
SA00254
Waveform 1. Propagation Delay, Data to Output,
Preset to Output, and Master Reset to Output
ÃÃÃ ÃÃÃÃÃÃÃÃÃÃ Dn
VM
ÃÃÃÃÃÃ ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ ts(H)
VM
th(H)
VM
ts(L)
VM
th(L)
tw(H)
LE
VM
VM
VM
NOTE: The shaded areas indicate when the input is permitted
to change for predictable output performance.
SA00256
Waveform 3. Data Setup and Hold Times and Latch Enable
Pulse Width
Dn
LE
VM
VM
tPLH
Qn
VM
tPHL
VM
SA00255
Waveform 2. Propagation Delay, Latch Enable
to Output
OE
VM
VM
tPZH
tPHZ
Qn
VM
VOHâ0.3V
0V
SA00066
Waveform 4. 3-State Output Enable Time to High Level and
Output Disable Time from High Level
OE
VM
VM
tPZL
tPLZ
Qn
VM
VOL +0.3V
VOL
SA00109
Waveform 5. 3-State Output Enable Time to Low Level and
Output Disable Time from Low Level
PRE, MR
LE
VM
VM
tw(L)
tREC
VM
Qn
Qn
SA00257
Waveform 6. Master Reset and Preset Pulse Width and Master
Reset and Preset to Latch Enable Recovery Time
1995 Sep 06
6
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