SN54173, SN54LS173A, SN74173, SN74LS173A
4-BIT D-TYPE REGISTERS
WITH 3-STATE OUTPUTS
SDLS067A – OCTOBER 1976 – REVISED JUNE 1999
recommended operating conditions
SN54LS173A
MIN NOM MAX
SN74LS173A
MIN NOM MAX
UNIT
V
Supply voltage
4.5
5
5.5
–1
4.75
5
5.25
–2.6
24
V
CC
OH
OL
I
I
High-level output current
Low-level output current
Operating free-air temperature
mA
mA
°C
12
T
A
–55
125
0
70
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN54LS173A
SN74LS173A
UNIT
UNIT
V
†
PARAMETER
TEST CONDITIONS
‡
‡
MIN TYP
MAX
MIN TYP
MAX
V
V
V
High-level input voltage
Low-level input voltage
Input clamp voltage
2
2
IH
0.7
0.8
V
IL
V
= MIN,
= MIN,
= V max,
IL
I = –18 mA
–1.5
–1.5
V
IK
CC
I
V
V
V
= 2 V,
= MAX
CC
IH
V
High-level output voltage
Low-level output voltage
2.4
3.4
2.4
3.1
V
OH
OL
I
I
I
IL
OH
= 12 mA
= 24 mA
= 2.7 V
= 0.4 V
0.25
0.4
0.25
0.35
0.4
0.5
20
V
V
V
V
= MIN,
= 0.8 V,
OL
OL
CC
V
IL
V
20
Off-state (high-impedance state)
output current
V
V
= MAX,
= 2 V
O
O
CC
I
I
V
O(off)
V
–20
–20
IH
Input current
at maximum input voltage
V
CC
= MAX,
V = 7 V
I
0.1
0.1
mA
I
I
I
I
I
High-level input current
Low-level input current
V
CC
V
CC
V
CC
V
CC
= MAX,
= MAX,
= MAX
= MAX,
V = 2.7 V
20
–0.4
–130
30
20
–0.4
–130
24
µA
mA
mA
mA
IH
I
V = 0.4 V
I
IL
§
Short-circuit output current
Supply current
–30
–30
OS
CC
See Note 4
19
19
†
‡
§
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
All typical values are at V = 5 V, T = 25°C.
Not more than one output should be shorted at a time.
CC
A
NOTE 4:
I
ismeasuredwithalloutputsopen;CLRgrounded,followingmomentaryconnectionto4.5V, N, G1, G2,andalldatainputsgrounded;
CC
and CLK and M at 4.5 V.
timing requirements over recommended operating conditions (unless otherwise noted)
SN54LS173A SN74LS173A
UNIT
MIN
MAX
MIN
MAX
f
t
Input clock frequency
Pulse duration
30
25
MHz
ns
clock
CLK or CLR
25
35
17
10
0
25
35
17
10
0
w
Data enable (G1, G2)
Data
t
Setup time
Hold time
ns
ns
su
h
CLR (inactive state)
Data enable (G1, G2)
Data
t
3
3
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TI [ TEXAS INSTRUMENTS ]
