74F385 Datasheet, PDF (2/6 Pages) NXP Semiconductors – Quad serial adder/subtractor

Philips Semiconductors
Quad serial adder/subtractor
Product specification
74F385
LOGIC SYMBOL
5 4 6 7 15 14 16 17
A0 B0 A1 B1 A2 B2 A3 B3
1
CP
11
MR
3
S0
8
S1
13
S2
18
S3
F0 F1 F2 F3
V_CC = Pin 20
GND = Pin 10
2 9 12 19
FUNCTION TABLE
INPUTS
MR
S
A
B
L
L
X
X
L
H
X
X
H
L
L
L
H
L
L
L
H
L
L
H
H
L
L
H
H
L
H
L
H
L
H
L
H
L
H
H
H
L
H
H
H
H
L
L
H
H
L
L
H
H
L
H
H
H
L
H
H
H
H
L
H
H
H
L
H
H
H
H
H
H
H
H
H = High voltage level
L = Low voltage level
X = Don’t care
↑ = Low-to-High Clock transition
SF00929
IEC/IEEE SYMBOL
11
Z1
1
C2
3
5
S /P–Q
M3
2D
R
P
4
Q
3CO/ 3BO 2D
3R ^Z4
4(3CI/ 3BI)
3S
8
6
7
13
15
14
18
16
17
2
9
11
19
SF00930
CARRY
FLIP-FLOP STATE
Before↑
After↑
L
L
H
H
L
L
H
L
L
L
H
H
L
L
H
H
L
H
H
H
L
L
H
H
L
L
H
L
L
H
H
H
L
L
H
H
OUTPUTS
F
L
L
L
H
H
L
H
L
L
H
H
L
L
H
L
H
H
L
OPERATING
MODE
Clear
Add
Subtract
1989 Sep 20
2