HEF4508BPB Просмотр технического описания (PDF) - Philips Electronics
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HEF4508BPB Datasheet PDF : 9 Pages
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Philips Semiconductors
Dual 4-bit latch
Product specification
HEF4508B
MSI
Fig.2 Pinning diagram.
HEF4508BP(N): 24-lead DIL; plastic
(SOT101-1)
HEF4508BD(F): 24-lead DIL; ceramic (cerdip)
(SOT94)
HEF4508BT(D): 24-lead SO; plastic
(SOT137-1)
( ): Package Designator North America
PINNING
D0A to D3A, D0B to D3B
STA , STB
MRA, MRB
EOA, EOB
O0A to O3A, O0B to O3B
data inputs
strobe inputs
master reset inputs
output enable inputs
3-state outputs
FUNCTION TABLE
INPUTS
MR
ST
EO
L
H
L
L
H
L
L
L
L
H
X
L
X
X
H
OUTPUT
Dn
On
H
H
L
L
X
latched
X
L
X
Z
Notes
1. H = HIGH state (the more positive voltage)
L = LOW state (the less positive voltage)
X = state is immaterial
Z = high impedance OFF state
January 1995
3
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