User`s guide

49 | P a g e
VCC = PIN 14
GND = PIN 7
2
3
D Q 5
CP
C Q D
1
4
6
12
11
D Q 9
CP
C Q D
13
10
8
SD SD
SN74LS74A
http://onsemi.com
3
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol Parameter Min Typ Max Unit Test Conditions
VIH Input HIGH Voltage 2.0 V
Guaranteed Input HIGH Voltage for
All Inputs
VIL Input LOW Voltage
0.8
V
Guaranteed Input LOW Voltage for
All Inputs
VIK Input Clamp Diode Voltage –0.65 –1.5 V VCC = MIN, IIN = – 18 mA
VOH Output HIGH Voltage
2.7 3.5 V VCC = MIN, IOH = MAX, VIN = VIH
or VIL per Truth Table
VO Output LOW Voltage
0.25 0.4 V IOL = 4.0 mA VCC = VCC MIN,
VOL VIN = VIL or VIH
0.35 0.5 V IOL = 8.0 mA
per Truth Table
IIH
Input High Current
Data, Clock
Set, Clear
20
40
A VCC = MAX, VIN = 2.7 V
IH
Data, Clock
Set, Clear
0.1
0.2 mA VCC = MAX, VIN = 7.0 V
IIL
Input LOW Current
Data, Clock
Set, Clear
–0.4
–0.8
mA VCC = MAX, VIN = 0.4 V
IOS Output Short Circuit Current (Note 1) –20 –100 mA VCC = MAX
ICC Power Supply Current 8.0 mA VCC = MAX
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS (TA = 25C, VCC = 5.0 V)
Limits
Symbol Parameter Min Typ Max Unit Test Conditions
fMAX Maximum Clock Frequency 25 33 MHz Figure 1
V 5 0 V