74ABT843 데이터 시트보기 (PDF) - Philips Electronics
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74ABT843 Datasheet PDF : 14 Pages
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Philips Semiconductors
9-bit bus interface latch with set and reset
(3-State)
Product specification
74ABT843
AC WAVEFORMS
VM = 1.5V, VIN = GND to 3.0V
PRE
MR, Dn
Qn
VM
tPLH
VM
VM
tPHL
VM
SA00254
Waveform 1. Propagation Delay, Data to Output,
Master Reset to Output, Preset to Output
ÉÉÉ ÉÉÉÉÉÉÉÉÉÉ Dn
VM
ÉÉÉÉÉÉ ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ 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
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
TEST CIRCUIT AND WAVEFORM
Dn
LE
VM
VM
tPLH
Qn
VM
tPHL
VM
SA00255
Waveform 2. Propagation Delay, Latch Enable
to Output
OE
VM
VM
tPZH
tPHZ
Qn
VOH –0.3V
VM
0V
SA00166
Waveform 4. 3-State Output Enable Time to High Level and
Output Disable Time from High Level
PRE, MR
LE
VM
VM
tw(L)
tREC
VM
Qn
Qn
SA00257
Waveform 6. Master Reset and Preset Pulse Width,
Master Reset and Preset to Latch Enable Recovery Time
1998 Jan 16
7
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