74LS194A Datasheet, PDF (2/8 Pages) National Semiconductor (TI) – 4-Bit Bidirectional Universal Shift Register

Absolute Maximum Ratings (Note)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage
7V
Input Voltage
7V
Operating Free Air Temperature Range
54LS
b55 C to a125 C
DM74LS
0 C to a70 C
Storage Temperature Range
b65 C to a150 C
Note The ‘‘Absolute Maximum Ratings’’ are those values
beyond which the safety of the device cannot be guaran-
teed The device should not be operated at these limits The
parametric values defined in the ‘‘Electrical Characteristics’’
table are not guaranteed at the absolute maximum ratings
The ‘‘Recommended Operating Conditions’’ table will define
the conditions for actual device operation
Recommended Operating Conditions
Symbol
Parameter
V_CC
Supply Voltage
V_IH
High Level Input Voltage
V_IL
Low Level Input Voltage
I_OH
High Level Output Current
I_OL
Low Level Output Current
f_CLK
Clock Frequency (Note 1)
Clock Frequency (Note 2)
t_W
Pulse Width
Clock
(Note 3)
Clear
t_SU
Setup Time
Mode
(Note 3)
Data
t_H
Hold Time (Note 3)
t_REL
Clear Release Time (Note 3)
T_A
Free Air Operating Temperature
Note 1 C_L e 15 pF T_A e 25 C and V_CC e 5V
Note 2 C_L e 50 pF R_L e 2 kX T_A e 25 C and V_CC e 5V
Note 3 T_A e 25 C and V_CC e 5V
Min
45
2
30
22
17
12
25
16
0
18
b55
54LS194A
Nom
5
Max
55
07
b0 4
4
0
125
DM74LS194A
Min
Nom
Max
4 75
5
5 25
2
08
b0 4
8
0
25
0
20
20
20
30
20
0
25
0
70
Units
V
V
V
mA
mA
MHz
ns
ns
ns
ns
C
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
Typ
(Note 4)
Max
Units
V_I
V_OH
V_OL
Input Clamp Voltage
High Level Output
Voltage
Low Level Output
Voltage
V_CC e Min I_I e b18 mA
V_CC e Min I_OH e Max
54LS
25
V_IL e Max V_IH e Min
DM74
27
V_CC e Min I_OL e Max
V_IL e Max V_IH e Min
54LS
DM74
b1 5
V
V
34
04
0 35
05
V
I_OL e 4 mA V_CC e Min
I_I
Input Current Max
V_CC e Max V_I e 7V
Input Voltage
04
01
mA
I_IH
High Level Input Current
V_CC e Max V_I e 2 7V
I_IL
Low Level Input Current
V_CC e Max V_I e 0 4V
I_OS
Short Circuit
Output Current
V_CC e Max
(Note 5)
54LS
DM74
b20
b20
20
mA
b0 4
mA
b100
mA
b100
I_CC
Supply Current
V_CC e Max (Note 6)
15
23
mA
Note 4 All typicals are at V_CC e 5V T_A e 25 C
Note 5 Not more than one output should be shorted at a time and the duration should not exceed one second
Note 6 With all outputs open inputs A through D grounded and 4 5V applied to S0 S1 CLEAR and the serial inputs I_CC is tested with momentary ground then
4 5V applied to CLOCK
2