SGS Thomson Microelectronics M74HC541, M74HC540 Datasheet

OCTAL BUS BUFFERWITH3 STATE OUTPUTS

HC540: INVERTED - H C541 NON INVERTED

.HIGH SPEED

tPD= 10 ns(TYP.) at VCC=5V

.LOWPOWERDISSIPATION

ICC=4µA (MAX.) at TA=25oC

.HIGH NOISEIMMUNITY

V

NIH=VINL

=28%VCC(MIN.)

.OUTPUT DRIVE CAPABILITY

15 LSTTL LOADS

.SYMMETRICALOUTPUT IMPEDANCE

|IOH|=IOL=6 mA(MIN)

.BALANCEDPROPAGATION DELAYS

t

PLH=tPHL

.WIDE OPERATINGVOLTAGE RANGE

VCC(OPR)= 2Vto 6V

.PIN ANDFUNCTION COMPATIBLE

WITH 54/74LS540/541

DESCRIPTION

The M54/74HC540 and HC541 are high speed
CMOS OCTAL BUS BUFFERS (3-STATE)
fabricated in silicongateC2MOStechnology. They
have the same high speed performance of LSTTL
combined withtrue CMOSlowpower consumption.
TheHC540isaninvertingbufferandHC541isa non
inverting buffer.
The 3 STATE control gate operates as a two input
AND suchthatif either G1andG2 arehigh,all eight
output are in the high impedance state. In order to

M54HC540/541
M74HC540/541

B1R

(PlasticPackage)

M1R

(MicroPackage)

ORDER CODES :

M54HC X XXF 1 R M74HC XXXM1R
M74HC X XXB1R M 74HCXX X C1R

enhance PC board layout, the HC540 and HC541
offers a pinout having inputs and outputs on
opposite sides of thepackage.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.

F1R

(CeramicPackage)

C1R

(Chip Carrier)

PIN CONNECTION (top view)

October 1993

HC541HC540

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M54/M74HC540/541

CHIP CARRIER

INPUT AND OUTPUT EQUIVALENT CIRCUIT

HC541HC54 0

PIN DESCRIPTION (HC540)

PIN No SYMBOL NAME AND FUNCTION

1, 19 1G, G2 Output Enable Inputs

2, 3, 4, 5,

6, 7, 8, 9

18, 17, 16,
15, 14, 13,

12, 11

10 GND Ground (0V)
20 V

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A1 to A8 Data Inputs

Y1 to Y8 Bus Outputs

CC

Positive Supply Voltage

PIN DESCR IPTION (HC541)

PIN No SYMBOL NAME AND FUNCTION

1, 19 1G, G2 Output Enable Inputs

2, 3, 4, 5,

6, 7, 8, 9

18, 17, 16,
15, 14, 13,

12, 11

10 GND Ground (0V)
20 V

A1 to A8 Data Inputs

Y1 to Y8 Bus Outputs

CC

Positive Supply Voltage

IEC LOGIC SYMBOLS

TRUTH TABLE

M54/M74HC540/ 541

HC541HC540

INPUT OUTPUT

G1 G2 An Yn (HC540) Yn (HC541)

HXXZZ
XHXZZ

LLHLH

X: ”H” or”L”
Z: High impedance

LLLHL

CIRCUIT SCHEMATIC (Per Circuit)

HC540 HC541

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M54/M74HC540/541

ABSOLU TE MAXI MU M RAT I NG S

Symbol Parameter Value Unit

V

CC

V

V

O

I

IK

I

OK

I

O

I

or I

CC

P

D

T

stg

T

AbsoluteMaximumRatings arethosevalues beyondwhichdamage tothedevicemayoccur.Functionaloperationunder theseconditionsisnotimplied.
(*)500 mW: ≅ 65oC derateto 300 mWby 10mW/oC: 65oCto85oC

RECO MM ENDED OPERAT IN G CO NDI TIONS

Symbol Parameter Value Unit

V

CC

V

I

V

O

T

op

t

r,tf

Supply Voltage -0.5 to +7 V
DC Input Voltage -0.5 to VCC+ 0.5 V

I

DC Output Voltage -0.5 to VCC+ 0.5 V
DC Input Diode Current ± 20 mA
DC Output Diode Current ± 20 mA
DC Output Source Sink Current Per Output Pin ± 35 mA
DC VCCor Ground Current ± 70 mA

GND

Power Dissipation 500 (*) mW
Storage Temperature -65 to +150
Lead Temperature (10sec) 300

L

Supply Voltage 2 to 6 V
Input Voltage 0 to V
Output Voltage 0 to V
Operating Temperature: M54HC Series

M74HC Series

CC
CC

-55 to +125

-40 to +85

Input Rise and Fall Time VCC= 2 V 0 to 1000 ns

V

= 4.5 V 0 to 500

CC

V

= 6 V 0 to 400

CC

o

C

o

C

V
V

o

C

o

C

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