Motorola SN54LS541J, SN54LS540J, SN74LS540DW, SN74LS540N, SN74LS541DW Datasheet

SN54/74LS540 OCTAL BUFFER/LINE DRIVER SN54/74LS541 WITH 3-STATE OUTPUTS

The SN54/74LS540 and SN54/74LS541 are octal buffers and line drivers with the same functions as the LS240 and LS241, but with pinouts on the opposite side of the package.

These device types are designed to be used as memory address drivers, clock drivers and bus-oriented transmitters/receivers. These devices are especially useful as output ports for the microprocessors, allowing ease of layout and greater PC board density.

•Hysteresis at Inputs to Improve Noise Margin

•PNP Inputs Reduce Loading

•3-State Outputs Drive Bus Lines

•Inputs and Outputs Opposite Side of Package, Allowing Easier Interface to Microprocessors

•Input Clamp Diodes Limit High-Speed Termination Effects

LOGIC AND CONNECTION DIAGRAMS DIP (TOP VIEW)

VCC			SN54 / 74LS540
20	19	18	17	16	15	14	13	12	11
1	2	3	4	5	6	7	8	9	10
									GND
VCC			SN54 / 74LS541
20	19	18	17	16	15	14	13	12	11

	1		2			3			4			5			6			7			8			9				10
																												GND

OCTAL BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS

LOW POWER SCHOTTKY

		J SUFFIX
		CERAMIC
	20	CASE 732-03
	1
		N SUFFIX
		PLASTIC
	20	CASE 738-03
	1
		DW SUFFIX
	20	SOIC
		CASE 751D-03
		1

ORDERING INFORMATION

SN54LSXXXJ Ceramic

SN74LSXXXN Plastic

SN74LSXXXDW SOIC

GUARANTEED OPERATING RANGES

Symbol	Parameter		Min	Typ	Max	Unit
VCC	Supply Voltage	54	4.5	5.0	5.5	V
		74	4.75	5.0	5.25
TA	Operating Ambient Temperature Range	54	± 55	25	125	°C
		74	0	25	70
IOH	Output Current Ð High	54			± 12	mA
		74			± 15
IOL	Output Current Ð Low	54			12	mA
		74			24

FAST AND LS TTL DATA

5-568

SN54/74LS540 •SN54/74LS541

BLOCK DIAGRAM

LS540

LS541

E1

(1)

E1

(1)

(19)

(19)

E2

E2

INPUTS

OUTPUTS

(2)

(18)

(2)

(18)

E1

E2

D

LS540

LS541

D1

Y1

D1

Y1

L

L

H

L

H

H

X

X

Z

Z

D2

(3)

(17)

Y2

D2

(3)

(17)

Y2

X

H

X

Z

Z

L

L

L

H

L

(4)

(16)

(4)

(16)

L = LOW Voltage Level

D3

Y3

D3

Y3

H = HIGH Voltage Level

D4

(5)

(15)

Y4

D4

(5)

(15)

Y4

X = Immaterial

Z = High Impedance

(6)

(14)

(6)

(14)

D5

Y5

D5

Y5

D6

(7)

(13)

D6

(7)

(13)

Y6

Y6

D7

(8)

(12)

D7

(8)

(12)

Y7

Y7

(9)

(11)

(9)

(11)

D8

Y8

D8

Y8

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

54

0.7

V

Guaranteed Input LOW Voltage for

74

0.8

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

54, 74

2.0

V

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

54, 74

0.25

0.4

V

I = 12 mA

VCC = VCC MIN,

VOL

Output LOW Voltage

OL

VIN = VIL or VIH

74

0.35

0.5

V

IOL = 24 mA

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

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

Power Supply Current

mA

Total, Output HIGH

LS540

25

LS541

32

mA

ICC

Total, Output LOW

LS540

45

mA

VCC = MAX

LS541

52

mA

Total Output 3-State

LS540

52

mA

LS541

55

mA

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

FAST AND LS TTL DATA

5-569