Datasheet

SN54173, SN54LS173A, SN74173, SN74LS173A
4-BIT D-TYPE REGISTERS
WITH 3-STATE OUTPUTS
SDLS067A – OCTOBER 1976 – REVISED JUNE 1999
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
FUNCTION TABLE
INPUTS
OUTPUT
CLR
CLK
DATA ENABLE
DATA
OUTPUT
Q
CLR
CLK
G1 G2
D
Q
H X X X X L
L LXXX Q
0
L↑HXX Q
0
L↑XHX Q
0
L↑L
L
L
L
L↑LLH H
When either M or N (or both) is (are) high, the output is
disabled to the high-impedance state; however, sequential
operation of the flip-flops is not affected.
logic symbol
†
G2
G
1
G
2
G
1
1Q
3
R
15
CLR
13
2D
2Q
4
12
3D
3Q
5
11
4D
4Q
6
1
M
10
7
CLK
&
†
This symbol is in accordance with ANSI/IEEE Standard 91-1984 and IEC Publication 617-12.
Pin numbers shown are for D, J, N, and W packages.
&
EN
C1
2
N
9
1D
14
1D 1Q
3
R
15
CLR
13
2D
2Q
4
12
3D
3Q
5
11
4D
4Q
6
1
M
10
7
CLK
&
&
EN
C1
2
N
9
1D
14
1D
’173 ’LS173A