hef4043b NXP Semiconductors, hef4043b Datasheet - Page 2

• Manufacturer Part Number: hef4043b
• Description: Quadruple R/s Latch With 3-state Outputs
• Manufacturer: NXP Semiconductors

Philips Semiconductors
DESCRIPTION
The HEF4043B is a quadruple R/S latch with 3-state
outputs with a common output enable input (EO). Each
latch has an active HIGH set input (S
HIGH reset input (R
output (O
When EO is HIGH, the state of the latch output (O
determined from the function table below. When EO is
LOW, the latch outputs are in the high impedance
OFF-state. EO does not affect the state of the latch.
The high impedance off-state feature allows common
busing of the outputs.
January 1995
Quadruple R/S latch with 3-state outputs
0
to O
3
Fig.1 Functional diagram.
).
0
to R
3
) and an active HIGH 3-state
0
to S
3
), an active
n
) can be
2
PINNING
FUNCTION TABLE
Notes
1. H = HIGH state (the more positive voltage)
FAMILY DATA, I
See Family Specifications
HEF4043BP(N):
HEF4043BD(F):
HEF4043BT(D):
( ): Package Designator North America
EO
S
R
O
0
0
0
to S
L = LOW state (the less positive voltage)
X = state immaterial
Z = high impedance state
to R
to O
EO
H
H
H
L
3
3
3
INPUTS
S
H
DD
X
L
L
Fig.2 Pinning diagram.
n
common output enable input
set inputs (active HIGH)
reset inputs (active HIGH)
3-state buffered latch outputs
LIMITS category MSI
16-lead DIL; plastic (SOT38-1)
16-lead DIL; ceramic (cerdip) (SOT74)
16-lead SO; plastic (SOT109-1)
R
X
H
X
L
n
Product specification
HEF4043B
OUTPUT
latched
O
H
Z
L
MSI
n