74LS540 datasheet(2/3 Pages) ONSEMI

2 / 3 page

BLOCK DIAGRAM

LS540

LS541

(1)

(19)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(11)

(12)

(13)

(14)

(15)

(16)

(17)

(18)

(1)

(19)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(11)

(12)

(13)

(14)

(15)

(16)

(17)

(18)

5-2

FAST AND LS TTL DATA

SN54/74LS540

• SN54/74LS541

INPUTS

OUTPUTS

LS540

LS541

L = LOW Voltage Level

H = HIGH Voltage Level

X = Immaterial

Z = High Impedance

DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)

Sb l

Limits

di i

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

VIH

Input HIGH Voltage

2.0

Guaranteed Input HIGH Voltage for

All Inputs

VIL

Input LOW Voltage

0.7

Guaranteed Input LOW Voltage for

VIL

Input LOW Voltage

0.8

All Inputs

VIK

Input Clamp Diode Voltage

– 0.65

– 1.5

VCC = MIN, IIN = – 18 mA

VOH

Output HIGH Voltage

54, 74

2.4

3.4

VCC = MIN, IOH = – 3.0 mA

VOH

Output HIGH Voltage

54, 74

2.0

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

VOL

Output LOW Voltage

54, 74

0.25

0.4

IOL = 12 mA

VCC = VCC MIN,

VIN =VIL or VIH

VOL

Output LOW Voltage

0.35

0.5

IOL = 24 mA

VIN = VIL or VIH

per Truth Table

VT+–VT–

Hysteresis

0.2

0.4

VCC = MIN

IOZH

Output Off Current HIGH

µA

VCC = MAX, VOUT = 2.7 V

IOZL

Output Off Current LOW

–20

µA

VCC = MAX, VOUT = 0.4 V

IIH

Input HIGH Current

µA

VCC = MAX, VIN = 2.7 V

IIH

Input HIGH Current

0.1

VCC = MAX, VIN = 7.0 V

IIL

Input LOW Current

– 0.2

VCC = MAX, VIN = 0.4 V

IOS

Short Circuit Current (Note 1)

–40

– 225

VCC = MAX

Power Supply Current

Total, Output HIGH

LS540

MAX

LS541

MAX

ICC

Total Output LOW

LS540

VCC = MAX

Total, Output LOW

LS541

Total Output 3-State

LS540

Total Output 3-State

LS541

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

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