ST 74LCX16240A User Manual

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74LCX16240A

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

WITH5VTOLERANT INPUTSAND OUTPUTS

■ 5VTOLERANTINPUTSANDOUTPUTS

■

HIGH SPEED:
t

=4.9ns(MAX.)at VCC=3.0V

PD

■

POWER-DOWNPROTECTIONONINPUTS
ANDOUTPUTS

■ SYMMETRICAL OUTPUTIMPEDANCE:

|=IOL=24mA (MIN)

|I

OH

■ PCIBUSLEVELSGUARANTEED AT 24mA

■ BALANCEDPROPAGATIONDELAYS:

t

≅ t

PLH

PHL

■ OPERATINGVOLTAGERANGE:

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

V

CC

■ PINANDFUNCTIONCOMPATIBLEWITH

74SERIES16240

■ LATCH-UPPERFORMANCE EXCEEDS500mA

■ ESDPERFORMANCE:

HBM>2000V;MM > 200V

(TSSOP48Package)

ORDERCODES :

74LCX16240AT

PIN CONNECTION

T

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.

February 1999

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74LCX16240A

INPUT AND OUTPUT EQUIVALENTCIRCUIT

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

7,18,31,42 V

GND Ground (0V)

Positive Supply Voltage

CC

IEC LOGIC SYMBOLSPIN DESCRIPTION

TRUTH TABLE

INPUT OUTPU T

GAnYn

LLH
LHL

HXZ

X:”H” or”L”
Z:Highimpedance

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74LCX16240A

ABSOLUTE MAXIMUM RATINGS

Symb o l Para met er Val u e Uni t

V

V
V
V

I
I

OK

I
orI

I

CC

T

T

AbsoluteMaximumRatingsarethose valuesbeyond whichdamagetothedevicemayoccur. Functionaloperationunder these conditionisnotimplied.

1)I

absolutemaximumratingmustbeobserved

O

2)V

<GND, VO>V

O

RECOMMENDED OPERATING CONDITIONS

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

V

V
V

I

OH,IOL

I

OH,IOL

T

dt/dv Input Transition Rise or Fall Rate (V

1)TruthTableguaranteed: 1.5V to3.6V

2)V

from0.8Vto 2.0V

IN

Supply Voltage -0.5to+ 7.0 V

CC

DC Input Voltage -0.5to+ 7.0 V

I

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

O

DC Output Voltage (High or Low State) (note1) -0.5toVCC+0.5 V

O

DC Input Diode Current -50 mA

IK

DC Output Diode Current (note2)
DC Output Source/Sink Current

O

DC VCCor Ground Current Per Supply Pin ±100 mA

GND

Storage Temperature -65to+150

stg

Lead Temperature (10 sec) 300

L

CC

Supply Voltage (note 1) 2.0to3.6 V

CC

V

Input Voltage 0to5.5 V

I

Output Voltage (OFF state) 0to5.5 V

O

Output Voltage (High or Low State) 0toV

O

50 mA

±

50 mA

±

CC

High or Low Level Output Current (VCC= 3.0 to 3.6V) ±24 mA
High or Low Level Output Current (VCC= 2.7 to 3.0V)
Operating Temperature: -40to+85

op

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

CC

12 mA

±

o

C

o

C

V

o

C

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