74LS

Manufacturer Part Number74LS
DescriptionSYNCHRONOUS 4-BIT UP/DOWN COUNTER
ManufacturerON Semiconductor
74LS datasheet
 


1
Page 1
2
Page 2
3
Page 3
4
Page 4
Page 3/4

Download datasheet (75Kb)Embed
PrevNext
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE
S
Symbol
b l
P
Parameter
V IH
Input HIGH Voltage
V IL
V IL
Input LOW Voltage
Input LOW Voltage
V IK
Input Clamp Diode Voltage
V OH
V OH
Output HIGH Voltage
Output HIGH Voltage
V OL
V OL
Output LOW Voltage
Output LOW Voltage
I IH
I
I IH
I
Input HIGH Current
Input HIGH Current
HIGH C
I IL
I IL
Input LOW Current
Input LOW Current
I OS
Short Circuit Current (Note 1)
I CC
Power Supply Current
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS
(T A = 25 C, V CC = 5.0 V)
Symbol
S
b l
P
Parameter
f MAX
Maximum Clock Frequency
t PLH
Propagation Delay,
t PHL
Clock to RCO
t PLH
Propagation Delay,
t PHL
Clock to Any Q
t PLH
Enable to RCO
t PHL
t PLH
U/D to RCO
t PHL
AC SETUP REQUIREMENTS
(T A = 25 C)
S
Symbol
b l
Parameter
P
t W
Clock Pulse Width
t s
Data Setup Time
t s
Enable Setup Time
t s
Load Setup Time
t s
U/D Setup Time
t h
Hold Time, Any Input
SN54/74LS669
(unless otherwise specified)
Limits
Min
Typ
Max
U i
Unit
2.0
V
54
0.7
V
V
74
0.8
– 0.65
– 1.5
V
54
2.5
3.5
V
74
2.7
3.5
V
54, 74
0.25
0.4
V
74
0.35
0.5
V
Others
20
A
Enable T
40
A
Others
0.1
mA
Enable T
0.2
mA
Others
–0.4
mA
Enable T
–0.8
mA
– 20
– 100
mA
34
mA
Limits
Unit
U i
Min
Typ
Max
25
32
MHz
26
40
ns
40
60
18
27
ns
18
27
11
17
ns
29
45
22
35
ns
26
40
Limits
Min
Typ
Max
Unit
U i
20
ns
20
ns
35
ns
25
ns
30
ns
0
ns
FAST AND LS TTL DATA
5-3
Test Conditions
T
C
di i
Guaranteed Input HIGH Voltage for
All Inputs
Guaranteed Input LOW Voltage for
p
g
All Inputs
V CC = MIN, I IN = – 18 mA
V CC = MIN, I OH = MAX, V IN = V IH
, OH
, IN
CC
IH
or V IL per Truth Table
V CC = V CC MIN,
I OL = 4.0 mA
V IN = V IL or V IH
V IN = V IL or V IH
I OL = 8.0 mA
per Truth Table
V CC = MAX, V IN = 2.7 V
V CC = MAX V IN = 2 7 V
V CC = MAX V IN = 7 0 V
V CC = MAX, V IN = 7.0 V
V CC = MAX, V IN = 0.4 V
V CC = MAX V IN = 0 4 V
V CC = MAX
V CC = MAX
T
Test Conditions
C
di i
C
C
C L = 15 pF
15 F
15 F
Test Conditions
T
C
di i
V CC = 5.0 V
V
V
V CC = 5 0 V
5 0 V
5 0 V