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74LCX16244A

LOW VOLTAGE CMOS 16-BIT BUS BUFFER (3-STATE)

WITH 5V TOLERANT INPUTS AND OUTPUTS

■ 5VTOLERANTINPUTSANDOUTPUTS

■

HIGHSPEED:
t

=5.2ns (MAX.)atVCC=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

74SERIES16244

■ LATCH-UPPERFORMANCEEXCEEDS500mA

■ ESDPERFORMANCE:

HBM>2000V; MM > 200V

(TSSOP48Package)

ORDERCODES:

74LCX16244AT

PIN CONNECTION

T

DESCRIPTION

The LCX16244A is a low voltage CMOS 16-BIT
BUS BUFFER (NON-INVERTED) 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
inputsand outputs.

Any nG output control governs four BUS
BUFFERS. Output Enable input (nG) tied
togethergives full 16-bit operation.

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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74LCX16244A

INPUT AND OUTPUT EQUIVALENTCIRCUIT

PI N No SYM BO L NAM E AND FU NCTIO 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

LLL
LHH

HXZ

X:”H” or”L”
Z:Highimpedance

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74LCX16244A

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

AbsoluteMaximumRatingsarethosevaluesbeyond whichdamageto thedevicemayoccur.Functionaloperationunder thesecondition isnotimplied.

1)I

absolutemaximum ratingmustbeobserved

O

2)V

<GND, VO>V

O

RECOMMENDED OPERATINGCONDITIONS

Symb o l Pa rameter Val 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: 1.5Vto3.6V

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) 0 to10 ns/V

CC

12 mA

±

o

C

o

C

V

o

C

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