ST 74LCX16240A User Manual

74LCX16240A

LOWVOL T AGECMOS16- BI TBUSBUFFER(3-STA TEINV.)

WITH5VTOLERANT INPUTSAND OUTPUTS



February 1999

ORDERCODES :

74LCX16240AT

■ 5VTOLERANTINPUTSANDOUTPUTS

■

HIGH SPEED:

t

PD

=4.9ns(MAX.)at V

CC

=3.0V

■

POWER-DOWNPROTECTIONONINPUTS

ANDOUTPUTS

■ SYMMETRICAL OUTPUTIMPEDANCE:

|I

OH

|=I

OL

=24mA (MIN)

■ PCIBUSLEVELSGUARANTEED AT 24mA

■ BALANCEDPROPAGATIONDELAYS:

t

PLH

≅ t

PHL

■ OPERATINGVOLTAGERANGE:

V

CC

(OPR)= 2.7Vto 3.6V (1.5VDataRetention)

■ PINANDFUNCTIONCOMPATIBLEWITH

74SERIES16240

■ LATCH-UPPERFORMANCE EXCEEDS500mA

■ ESDPERFORMANCE:

HBM>2000V;MM > 200V

DESCRIPTION

The LCX16240A is a low voltage CMOS 16-BIT

BUS BUFFER fabricated with sub-micron silicon

gate and double-layer metal wiring C

2

MOS

technology. It is ideal for low power and high

speed 3.3V applications; it can be interfaced to

5V signal environment for both inputs and

outputs.

Any nG output control governs four BUS

BUFFERS. Output Enable input (nG) tied

togethergives full 16-bitoperation.

When nG is LOW, the outputs are on. When nG

is HIGH,the output are in highimpedancestate.

This device is designed to be used with 3 state

memoryaddress drivers, etc.

It has better speed performance at 3.3V than 5V

LSTTL family combined with the true CMOS low

powerconsumption.

All inputs and outputs are equipped with

protection circuits against static discharge, giving

them 2KV ESD immunity and transient excess

voltage.

T

(TSSOP48Package)

PIN CONNECTION

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查询74LCX16240A供应商

TRUTH TABLE

INPUT OUTPU T

GAnYn

LLH

LHL

HXZ

X:”H” or”L”

Z:Highimpedance

INPUT AND OUTPUT EQUIVALENTCIRCUIT

IEC LOGIC SYMBOLSPIN DESCRIPTION

PI N No SYM BO L NAM E AND FUNCTIO N

1 1G Output Enable Input

2,3,5,6 1Y1to 1Y4 Data Outputs

8,9,11,12 2Y1to 2Y4 Data Outputs

13,14, 16,17 3Y1to 3Y4 Data Outputs

19,20, 22,23 4Y1to 4Y4 Data Outputs

24 4G Output Enable Input

25 3G Output Enable Input

30,29, 27,26 4A1to 4A4 Data Inputs

36,35, 33,32 3A1to 3A4 Data Inputs

41,40, 38,37 2A1to 2A4 Data Inputs

47,46, 44,43 1A1to 1A4 Data Inputs

48 2G Output Enable Input

4,10,15,21,

28,34, 39,45

GND Ground (0V)

7,18,31,42 V

CC

Positive Supply Voltage

74LCX16240A

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ABSOLUTE MAXIMUM RATINGS

Symb o l Para met er Val u e Uni t

V

CC

Supply Voltage -0.5to+ 7.0 V

V

I

DC Input Voltage -0.5to+ 7.0 V

V

O

DC Output Voltage (OFF state) -0.5to+ 7.0 V

V

O

DC Output Voltage (High or Low State) (note1) -0.5toV

CC

+0.5 V

I

IK

DC Input Diode Current -50 mA

I

OK

DC Output Diode Current (note2)

±

50 mA

I

O

DC Output Source/Sink Current

±

50 mA

I

CC

orI

GND

DC V

CC

or Ground Current Per Supply Pin ±100 mA

T

stg

Storage Temperature -65to+150

o

C

T

L

Lead Temperature (10 sec) 300

o

C

AbsoluteMaximumRatingsarethose valuesbeyond whichdamagetothedevicemayoccur. Functionaloperationunder these conditionisnotimplied.

1)I

O

absolutemaximumratingmustbeobserved

2)V

O

<GND, V

O

>V

CC

RECOMMENDED OPERATING CONDITIONS

Symb o l Pa rameter Va l u e U n i t

V

CC

Supply Voltage (note 1) 2.0to3.6 V

V

I

Input Voltage 0to5.5 V

V

O

Output Voltage (OFF state) 0to5.5 V

V

O

Output Voltage (High or Low State) 0toV

CC

V

I

OH

,I

OL

High or Low Level Output Current (V

CC

= 3.0 to 3.6V) ±24 mA

I

OH

,I

OL

High or Low Level Output Current (V

CC

= 2.7 to 3.0V)

±

12 mA

T

op

Operating Temperature: -40to+85

o

C

dt/dv Input Transition Rise or Fall Rate (V

CC

= 3.0V) (note 2) 0to10 ns/V

1)TruthTableguaranteed: 1.5V to3.6V

2)V

IN

from0.8Vto 2.0V

74LCX16240A

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