HEF4724BF Ver la hoja de datos (PDF) - Philips Electronics
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Fabricante
HEF4724BF Datasheet PDF : 7 Pages
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Philips Semiconductors
8-bit addressable latch
Product specification
HEF4724B
MSI
MODE SELECTION
E
CL
MODE
L
L addressable latch
H
L memory
L
H active HIGH 8-channel demultiplexer
H
H clear
FUNCTION TABLE
CL E
HH
HL
HL
HL
HL
HL
HL
HL
HL
LH
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
D
A0 A1 A2 O0
X
XX
X
L
D1
L
L
L
D1
D1
H
L
L
L
D1
L
H
L
L
D1
H
H
L
L
D1
L
L
H
L
D1
H
L
H
L
D1
L
H
H
L
D1
H
H
H
L
X
X
X
X On-1
D1
L
L
L
D1
D1
H
L
L
On-1
D1
L
H
L
On-1
D1
H
H
L
On-1
D1
L
L
H On-1
D1
H
L
H On-1
D1
L
H
H On-1
D1
H
H
H On-1
Notes
1. H = HIGH state (the more positive voltage)
L = LOW state (the less positive voltage)
X = state is immaterial
On-1 = state before the positive transition of E
D1 = either HIGH or LOW
O1
L
L
D1
L
L
L
L
L
L
On-1
On-1
D1
On-1
On-1
On-1
On-1
On-1
On-1
O2
L
L
L
D1
L
L
L
L
L
On-1
On-1
On-1
D1
On-1
On-1
On-1
On-1
On-1
O3
L
L
L
L
D1
L
L
L
L
On-1
On-1
On-1
On-1
D1
On-1
On-1
On-1
On-1
O4
L
L
L
L
L
D1
L
L
L
On-1
On-1
On-1
On-1
On-1
D1
On-1
On-1
On-1
O5 O6 O7 MODE
L L L clear
LLL
LLL
L
L
L
D1
L
L
On-1
On-1
On-1
On-1
On-1
On-1
D1
On-1
On-1
L
L
L
L
D1
L
On-1
On-1
On-1
On-1
On-1
On-1
On-1
D1
On-1
L
L
L
L
L
D1
On-1
On-1
On-1
On-1
On-1
On-1
On-1
On-1
D1
demultiplexer;
unaddressed
latch is
cleared
memory
addressable
latch;
unaddressed
latch holds
previous
state
January 1995
4
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