Datasheet

SN54AS867, SN54AS869
SN74ALS867A, SN74ALS869, SN74AS867, SN74AS869
SYNCHRONOUS 8-BIT UP/DOWN COUNTERS
SDAS115C – DECEMBER 1982 – REVISED JANUARY 1995
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic diagram (positive logic)
1D
R
C1
A
ENP
S1
S0
CLK
ENT
Q
A
RCO
1
2
11
23
14
3
13
22
1D
R
C1
B
Q
B
4
21
1D
R
C1
C
Q
C
5
20
1D
R
C1
D
Q
D
6
19
1D
R
C1
E
Q
E
7
18
′AS867 Only
(asynchronous clear)
1D
R
C1
F
Q
F
8
17
1D
R
C1
G
Q
G
9
16
1D
R
C1
H
Q
H
10
15
′AS867, ′AS869
Pin numbers shown are for the DW, JT, and NT packages.