HEF4008 Philips Semiconductors, HEF4008 Datasheet - Page 2

• Manufacturer Part Number: HEF4008
• Description: 4-bit binary full adder
• Manufacturer: Philips Semiconductors

Philips Semiconductors
DESCRIPTION
The HEF4008B is a 4-bit binary full
adder with two 4-bit data inputs (A
A
sum outputs (S
January 1995
HEF4008BP(N):
HEF4008BD(F):
HEF4008BT(D):
( ): Package Designator North America
3
, B
4-bit binary full adder
0
to B
3
), a carry input (C
0
to S
3
), and a carry
Fig.1 Functional diagram.
16-lead DIL; plastic
16-lead DIL; ceramic (cerdip)
16-lead SO; plastic
IN
(SOT38-1)
(SOT74)
(SOT109-1)
), four
0
to
output (C
look-ahead across 4-bits to generate
C
for extensive look-ahead and
carry-cascading circuits.
OUT
. This minimizes the necessity
OUT
). The IC uses full
2
PINNING
TRUTH TABLE (one adder)
FAMILY DATA, I
See Family Specifications
A
B
S
C
C
0
0
0
IN
OUT
C
H
H
H
H
L
L
L
L
to A
to B
to S
IN
3
3
3
Fig.2 Pinning diagram.
A
H
H
H
H
L
L
L
L
DD
Product specification
B
H
H
H
H
L
L
L
L
LIMITS category MSI
data inputs
data inputs
sum outputs
carry input
carry output
HEF4008B
C
OUT
H
H
H
H
L
L
L
L
MSI
S
H
H
H
H
L
L
L
L