74LS168 Datasheet, PDF (2/6 Pages) National Semiconductor (TI) – 54LS168 Synchronous Bi-Directional BCD Decade Counter

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
5 5V
Operating Free Air Temperature Range
54LS
b55 C to a125 C
Storage Temperature Range
b65 C to a150 C
Recommended Operating Conditions
Symbol
Parameter
V_CC
V_IH
V_IL
I_OH
I_OL
T_A
t_s (H)
t_s (L)
t_h (H)
t_h (L)
t_s (H)
t_s (L)
t_h (H)
t_h (L)
t_s (H)
t_s (L)
t_h (H)
t_h (L)
t_w (H)
t_w (L)
Supply Voltage
High Level Input Voltage
Low Level Input Voltage
High Level Output Current
Low Level Output Current
Free Air Operating Temperature
Setup Time HIGH or LOW
P_n CEP or CET to CP
Hold Time HIGH or LOW
P_n CEP or CET to CP
Setup Time HIGH or LOW
PE to CP
Hold Time HIGH or LOW
PE to CP
Setup Time HIGH or LOW
U D to CP
Hold Time HIGH or LOW
U D to CP
CP Pulse Width HIGH or LOW
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
Min
45
2
b55
15
15
5
5
20
20
0
0
25
25
0
0
20
20
54LS168
Nom
5
Max
55
07
b0 4
4
125
Units
V
V
V
mA
mA
C
ns
ns
ns
ns
ns
ns
ns
2