Datasheet

SN54AS867, SN54AS869
SN74ALS867A, SN74ALS869, SN74AS867, SN74AS869
SYNCHRONOUS 8-BIT UP/DOWN COUNTERS
SDAS115C – DECEMBER 1982 – REVISED JANUARY 1995
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic diagram (positive logic)
A
1D
R
C1
22
Q
A
14
1
2
23
3
B
1D
R
C1
21
Q
B
4
C
1D
R
C1
20
Q
C
5
D
1D
R
C1
19
Q
D
6
E
1D
R
C1
18
Q
E
7
ENP
S1
S0
CLK
F
1D
R
C1
17
Q
F
8
G
1D
R
C1
16
Q
G
9
H
1D
R
C1
15
Q
H
10
13
RCO
ENT
11
SN74ALS867A Only
(asynchronous clear)
SN74ALS867A, SN74ALS869
Pin numbers shown are for the DW, JT, and NT packages.