BLOCK DIAGRAM

LS540

LS541

E1

E2

D1

D2

D3

D4

D5

D6

D7

D8

Y8

Y7

Y6

Y5

Y4

Y3

Y2

Y1

(1)

(19)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(11)

(12)

(13)

(14)

(15)

(16)

(17)

(18)

E1

E2

D1

D2

D3

D4

D5

D6

D7

D8

Y8

Y7

Y6

Y5

Y4

Y3

Y2

Y1

(1)

(19)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(11)

(12)

(13)

(14)

(15)

(16)

(17)

(18)

5-569

FAST AND LS TTL DATA

SN54/74LS540

• SN54/74LS541

INPUTS

OUTPUTS

E1

E2

D

LS540

LS541

L

L

H

L

H

H

X

X

Z

Z

X

H

X

Z

Z

L

L

L

H

L

L = LOW Voltage Level

H = HIGH Voltage Level

X = Immaterial

Z = High Impedance

Symbol

Parameter

Limits

Unit

Test Conditions

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

54

0.7

V

Guaranteed Input LOW Voltage for

All Inputs

VIL

Input LOW Voltage

74

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

54, 74

2.4

3.4

V

VCC = MIN, IOH = – 3.0 mA

VOH

Output HIGH Voltage

54, 74

2.0

V

VCC = MIN, IOH = MAX, VIL = 0.5 V

VOL

Output LOW Voltage

54, 74

0.25

0.4

V

IOL = 12 mA

VCC = VCC MIN,

VIN = VIL or VIH

per Truth Table

VOL

Output LOW Voltage

74

0.35

0.5

V

IOL = 24 mA

VIN = VIL or VIH

per Truth Table

VT+–VT–

Hysteresis

0.2

0.4

V

VCC = MIN

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

– 0.2

mA

VCC = MAX, VIN = 0.4 V

IOS

Short Circuit Current (Note 1)

– 40

– 225

mA

VCC = MAX

ICC

Power Supply Current

Total, Output HIGH

LS540

25

mA

VCC = MAX

ICC

LS541

32

mA

VCC = MAX

ICC

Total, Output LOW

Total Output 3-State

LS540

45

mA

VCC = MAX

ICC

Total, Output LOW

Total Output 3-State

LS541

52

mA

VCC = MAX

Total Output 3-State

LS540

52

mA

Total Output 3-State

LS541

55

mA

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