SN74LS373, SN74LS374

http://onsemi.com

3

LOGIC DIAGRAMS

SN74LS373

SN74LS374

D

D

G

Q

CP

QQ

CP

OE

OE

LE

LATCH

ENABLE

O0

O1

O2

O3

O4

O5

O6

O7

D0

14

1

26

7

3

8

4

5

9

11

12

16

13

15

GND = PIN 10

= PIN NUMBERS

D

G

Q

D1

D

G

Q

D2

D

G

Q

D3

D

G

Q

D4

D

G

Q

D5

D

G

Q

D6

D

G

Q

D7

17

18

19

O0

O1

O2

O3

O4

O5

O6

O7

26

5

9

12

16

15

19

D0

14

7

3

8

4

13

D1

D2

D3

D4

D5

D6

D7

17

18

1

11

D

CP

QQ

D

CP

QQ

D

CP

QQ

D

CP

QQ

D

CP

QQ

D

CP

QQ

D

CP

QQ

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

2.4

3.1

V

VCC = MIN, IOH = MAX, VIN = VIH

or VIL per Truth Table

VOL

Output LOW Voltage

0.25

0.4

V

IOL = 12 mA

VCC = VCC MIN,

VIN VIL or VIH

VOL

Output LOW Voltage

0.35

0.5

V

IOL = 24 mA

VIN = VIL or VIH

per Truth Table

IOZH

Output Off Current HIGH

20

µA

VCC = MAX, VOUT = 2.7 V

IOZL

Output Off Current LOW

–20

µA

VCC = MAX, VOUT = 0.4 V

IIH

Input HIGH Current

20

µA

VCC = MAX, VIN = 2.7 V

IIH

Input HIGH Current

0.1

mA

VCC = MAX, VIN = 7.0 V

IIL

Input LOW Current

–0.4

mA

VCC = MAX, VIN = 0.4 V

IOS

Short Circuit Current (Note 1)

–30

–130

mA

VCC = MAX

ICC

Power Supply Current

40

mA

VCC = MAX

1. Not more than one output should be shorted at a time, nor for more than 1 second.