SGS Thomson Microelectronics 74LVX244MTR, 74LVX244M, 74LVX244TTR Datasheet

1/9July 2001

■ HIGH SPEED:

t

PD

=4.5ns (TYP.) at VCC = 3.3V

■ 5V TOLERANT INPUTS

■ POWER-DOWN PROTECTION ON INPUTS

■ INPUT VOLTAGE LEVEL:

V

IL

= 0.8V, VIH = 2V at VCC =3V

■ LOW POWER DISSIPATION:

I

CC

= 4 µA (MAX.) at TA=25°C

■ LOW NOISE:

V

OLP

= 0.5V (TYP.) at VCC =3.3V

■ SYMMETRICAL OUTPUT IMPEDANCE:

|I

OH

| = IOL = 4 mA (MIN) at VCC =3V

■ BALANCED PROPAGATION DELAYS:

t

PLH

≅ t

PHL

■ OPERATING VOLTAGE R ANGE:

V

CC

(OPR) = 2V to 3.6V (1.2V Data Retention)

■ PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 244

■ IMPROVED LATCH-UP IMMUNITY

DESCRIPTION

The 74LVX244 is a low voltage CMOS OCTAL
BUS BUFFER (3-STATE) fabricated with
sub-micron silicon gate and double-layer metal
wiring C

2

MOS technology. It is ideal for low
power, battery operated and low noise 3.3V
applications.

G

output enable governs four BUS BUFFERs
Power down protection is provided on all inputs
and 0 to 7V can be accepted on inputs with no
regard to the supply voltage.
This device can be used to interface 5V to 3V. It
combines high speed performance with the true
CMOS low power consumption.
All inputs and outputs are equipped with
protection circuits against stat ic discharge, giving
them 2KV ESD immunity and transient excess
voltage.

74LVX244

LOW VOLTAGE CMOS OCTAL BUS BUFFER

WITH 3 STATE OUTPUTS (NON INVERTED)

PIN CONNECTION AND IEC LOGIC SYMBOLS

ORDER CODES

PACKAGE TUBE T & R

SOP 74LVX244M 74LVX244MTR

TSSOP 74LVX244TTR

TSSOPSOP

74LVX244

2/9

INPUT EQUIVALENT CIRCUIT PIN DESCRIPTION

TRUTH TABLE

X :Don‘t Care
Z : High Impedance

ABSOLUTE MAXIMUM RATINGS

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied

RECOMMENDED OPERATING CONDITIONS

1) Truth T abl e guaranteed: 1.2V to 3.6V

2) V

IN

from 0.8V to 2.0V

PIN No SYMBOL NAME AND FUNCTION

11G

Output Enable Input
2, 4, 6, 8 1A1 to 1A4 Data Inputs
9, 7, 5, 3 2Y1 to 2Y4 Data Outputs

11, 13, 15, 172A1 to 2A4 Data Inputs

18, 16, 14, 121Y1

to 1Y4 Data Outputs

19 2G

Output Enable Input

10 GND Ground (0V)
20 V

CC

Positive Supply Voltage

INPUTS OUTPUT

G

An Yn

LLL
LHH

HXZ

Symbol Parameter Value Unit

V

CC

Supply Voltage

-0.5 to +7.0 V

V

I

DC Input Voltage

-0.5 to +7.0 V

V

O

DC Output Voltage -0.5 to VCC + 0.5

V

I

IK

DC Input Diode Current

- 20 mA

I

OK

DC Output Diode Current

± 20 mA

I

O

DC Output Current

± 25 mA

I

CC

or I

GND

DC VCC or Ground Current

± 50 mA

T

stg

Storage Temperature

-65 to +150 °C

T

L

Lead Temperature (10 sec)

300 °C

Symbol Parameter Value Unit

V

CC

Supply Voltage (note 1)

2 to 3.6 V

V

I

Input Voltage

0 to 5.5 V

V

O

Output Voltage 0 to V

CC

V

T

op

Operating Temperature

-55 to 125 °C

dt/dv

Input Rise and Fall Time (note 2) (V

CC

= 3V)

0 to 100 ns/V

74LVX244

3/9

DC SPECIFICATIONS

DYNAMIC SWITCHING CHARACTERISTICS

1) Worst c ase package.

2) Max number of output s defined as (n). Dat a i nputs are driven 0V to 3.3V, (n -1) outputs switc hi ng and one out put at GND.

3) Max number of data inputs (n) switching. (n-1) switching 0V to 3.3V. Inputs under test switching: 3.3V to threshold (V

ILD

), 0V to threshold

(V

IHD

), f=1MHz.

Symbol Parameter

Test Condition Value

Unit

V

CC

(V)

T

A

= 25°C

-40 to 85°C -55 to 125°C

Min. Typ. Max. Min. Max. Min. Max.

V

IH

High Level Input
Voltage

2.0 1.5 1.5 1.5
V3.0

2.0 2.0 2.0

3.6

2.4 2.4 2.4

V

IL

Low Level Input
Voltage

2.0 0.5 0.5 0.5
V3.0 0.8 0.8 0.8

3.6 0.8 0.8 0.8

V

OH

High Level Output
Voltage

2.0

IO=-50 µA

1.9 2.0 1.9 1.9
V3.0

I

O

=-50 µA

2.9 3.0 2.9 2.9

3.0

I

O

=-4 mA

2.58 2.48 2.4

V

OL

Low Level Output
Voltage

2.0

I

O

=50 µA

0.0 0.1 0.1 0.1
V3.0

I

O

=50 µA

0.0 0.1 0.1 0.1

3.0

I

O

=4 mA

0.36 0.44 0.55

I

OZ

High Impedance
Output Leakage
Current

3.6

V

I

= VIH or V

IL

VO = VCC or GND

±0.25 ± 2.5 ± 2.5 µA

I

I

Input Leakage
Current

3.6

V

I

= 5.5V or GND

± 0.1 ± 1 ± 1 µA

I

CC

Quiescent Supply
Current

3.6

V

I

= VCC or GND

44040µA

Symbol Parameter

Test Condition Value

Unit

V

CC

(V)

T

A

= 25°C

-40 to 85°C -55 to 125°C

Min. Typ. Max. Min. Max. Min. Max.

V

OLP

Dynamic Low
Voltage Quiet
Output (note 1, 2)

3.3

C

L

= 50 pF

0.5 0.8

V

V

OLV

-0.8 -0.5

V

IHD

Dynamic High
Voltage Input
(note 1, 3)

3.3 2.0

V

ILD

Dynamic Low
Voltage Input
(note 1, 3)

3.3 0.8