SGS Thomson Microelectronics 74LVC244ATTR, 74LVC244AMTR, 74LVC244AM Datasheet

1/9February 2002

■ 5V TOLERANT INPUTS

■ HIGH SPEED: t

PD

= 5.9ns (MAX.) at VCC = 3V

■ POWER DOWN PROTECTION ON INPU T S

AND OUTPUTS

■ SYMMETRICAL OUTPUT IMPEDANCE:

|I

OH

| = IOL = 24mA (MIN) at VCC = 3V

■ PCI BUS LEVELS GUARANT EED AT 2 4 mA

■ BALANCED PROPAGATION DELAYS:

t

PLH

≅ t

PHL

■

OPERATING VOLTAGE RANGE:
V

CC

(OPR) = 1.65V to 3.6V (1.2V Data

Retention)

■ PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 244

■ LATCH-UP PERFORMANCE EXCEEDS

500mA (JESD 17)

■ ESD PERFORMANCE:

HBM > 2000V (MIL STD 883 method 3015);
MM > 200V

DESCRIPTION

The 74LVC244A is a lo w 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 1.65 to 3.6

V

CC

operations and low power and low noise

applications.

It can be interfaced to 5V signal environment for
inputs in mixed 3.3/5V system.
G

control output governs four BUS BUFFERs.
This device is designed to be used with 3 state
memory address drivers, etc.
It has more speed performance at 3.3V than 5V
AC/ACT family, combined with a lower power
consumption.
All inputs and outputs are equipped with
protection circuits against stat ic discharge, giving
them 2KV ESD immunity and transient excess
voltage.

74LVC244A

LOW VOLTAGE CMOS QUAD BUS BUFFERS (3-STATE)

HIGH PERFORMANCE

.

PIN CONNECTION AND IEC LOGIC SYMBOLS

ORDER CODES

PACKAGE TUBE T & R

SOP 74LVC244AM 74LVC244AMTR

TSSOP 74LVC244ATTR

TSSOPSOP

74LVC244A

2/9

INPUT AND OUTPUT 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

1) I

O

absolute ma xim um rating must be obse rved

2) V

O

< GND

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 (High Impedance or VCC = 0V)

-0.5 to +7.0 V

V

O

DC Output Voltage (High or Low State) (note 1) -0.5 to VCC + 0.5

V

I

IK

DC Input Diode Current

- 50 mA

I

OK

DC Output Diode Current (note 2)

- 50 mA

I

O

DC Output Current

± 50 mA

I

CC

or I

GND

DC VCC or Ground Current per Supply Pin

± 100 mA

T

stg

Storage Temperature

-65 to +150 °C

T

L

Lead Temperature (10 sec)

300 °C

74LVC244A

3/9

RECOMMENDED OPERATING CONDITIONS

1) Truth T abl e guarante ed: 1.2V to 3.6 V

2) V

IN

from 0.8V to 2V at VCC = 3.0V

DC SPECIFICATIONS

Symbol Parameter Value Unit

V

CC

Supply Voltage (note 1)

1.65 to 3.6 V

V

I

Input Voltage

0 to 5.5 V

V

O

Output Voltage (High Impedance or VCC = 0V)

0 to 5.5 V

V

O

Output Voltage (High or Low State) 0 to V

CC

V

I

OH

, I

OL

High or Low Level Output Current (VCC = 3.0 to 3.6V)

± 24 mA

I

OH

, I

OL

High or Low Level Output Current (VCC = 2.7 to 3.0V)

± 12 mA

I

OH

, I

OL

High or Low Level Output Current (VCC = 2.3 to 2.7V)

± 8mA

I

OH

, I

OL

High or Low Level Output Current (VCC = 1.65 to 2.3V)

± 4mA

T

op

Operating Temperature

-55 to 125 °C

dt/dv Input Rise and Fall Time (note 2) 0 to 10 ns/V

Symbol Parameter

Test Condition Value

Unit

V

CC

(V)

-40 to 85 °C -55 to 125 °C

Min. Max. Min. Max.

V

IH

High Level Input
Voltage

1.65 to 1.95

0.65V

CC

0.65V

CC

V

2.3 to 2.7 1.7 1.7

2.7 to 3.6 2 2

V

IL

Low Level Input
Voltage

1.65 to 1.95

0.35V

CC

0.35V

CC

V

2.3 to 2.7 0.7 0.7

2.7 to 3.6 0.8 0.8

V

OH

High Level Output
Voltage

1.65 to 3.6

IO=-100 µAVCC-0.2 VCC-0.2

V

1.65

I

O

=-4 mA

1.2 1.2

2.3

I

O

=-8 mA

1.7 1.7

2.7

I

O

=-12 mA

2.2 2.2

3.0

I

O

=-18 mA

2.4 2.4

3.0

I

O

=-24 mA

2.2 2.2

V

OL

Low Level Output
Voltage

1.65 to 3.6

I

O

=100 µA

0.2 0.2

V

1.65

I

O

=4 mA

0.45 0.45

2.3

I

O

=8 mA

0.7 0.7

2.7

I

O

=12 mA

0.4 0.4

3.0

I

O

=24 mA

0.55 0.55

I

I

Input Leakage
Current

3.6

V

I

= 0 to 5.5V

± 5 ± 5 µA

I

off

Power Off Leakage
Current

0

V

I

or VO = 5.5V

10 10 µA

I

OZ

High Impedance
Output Leakage
Current

3.6 VI = VIH orVIL
V

O

= 0 to 5.5V

± 5 ± 5 µA

I

CC

Quiescent Supply
Current

3.6

VI = VCC or GND

10 10

µA

V

I

or VO = 3.6 to

5.5V

± 10 ± 10

∆I

CC

ICC incr. per Input

2.7 to 3.6

VIH = VCC-0.6V

500 500 µA

74LVC244A

4/9

DYNAMIC SWITCHING CHARACTERISTICS

1) Number of output defined as "n". Measured with "n-1" outputs switc hi ng from HIGH to LOW or LOW to H IGH. The remai ning outp ut is
measur ed i n the LOW sta te.

AC ELECTRICAL CHARACTERISTICS

1) Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switch­ing in the same direction, either HIGH or LOW ( t

OSLH

= | t

PLHm

- t

PLHn

|, t

OSHL

= | t

PHLm

- t

PHLn

|

2) Param eter guaranteed by design

CAPACITIVE CHARACTERISTICS

1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without

load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I

CC(opr)

= CPD x VCC x fIN + ICC/n (per c ircuit )

Symbol Parameter

Test Condition Value

Unit

V

CC

(V)

T

A

= 25 °C

Min. Typ. Max.

V

OLP

Dynamic Low Level Quiet
Output (note 1)

3.3

C

L

= 50pF

V

IL

= 0V, VIH = 3.3V

0.8
V

V

OLV

-0.8

Symbol Parameter

Test Condition Value

Unit

V

CC

(V)

C

L

(pF)

R

L

(Ω)

t

s

= t

r

(ns)

-40 to 85 °C -55 to 125 °C

Min. Max. Min. Max.

t

PLH tPHL

Propagation Delay
Time

1.65 to 1.95 30 1000 2.0 9.0 12
ns

2.3 to 2.7 30 500 2.0 7.9 10.5

2.7 50 500 2.5 1.5 6.9 8.3

3.0 to 3.6 50 500 2.5 1 5.9 7.1

t

PZL tPZH

Output Enable Time 1.65 to 1.95 30 1000 2.0 11 14.3

ns

2.3 to 2.7 30 500 2.0 9.6 12.5

2.7 50 500 2.5 1 8.6 10.3

3.0 to 3.6 50 500 2.5 1 7.6 9.1

t

PLZ tPHZ

Output Disable Time 1.65 to 1.95 30 1000 2.0 9.0 11.7

ns

2.3 to 2.7 30 500 2.0 7.8 10.1

2.7 50 500 2.5 2 6.8 8.2

3.0 to 3.6 50 500 2.5 2 6.5 7.8

t

OSLH

t

OSHL

Output To Output
Skew Time (note1,

2)

2.7 to 3.6 1 1 ns

Symbol Parameter

Test Condition Value

Unit

V

CC

(V)

T

A

= 25 °C

Min. Typ. Max.

C

IN

Input Capacitance

4pF

C

PD

Power Dissipation Capacitance
(note 1)

1.8 fIN = 10MHz 28
pF2.5 30

3.3 34

74LVC244A

5/9

TEST CIRCUIT

RT = Z

OUT

of pulse generator (typically 50Ω)

TEST CIRCUIT AND WAVEFORM SYMBOL VALUE

Symbol

V

CC

1.65 to 1.95V 2.3 to 2.7V 2.7V 3.0 to 3.6V

C

L

30pF 30pF 50pF 50pF

R

L = R1

1000Ω 500Ω 500Ω 500Ω

V

S

2 x V

CC

2 x V

CC

6V 6V

V

IH

V

CC

V

CC

2.7V 2.7V

V

M

VCC/2 VCC/2 1.5V 1.5V

V

OH

V

CC

V

CC

3.0V 3.0V

V

X

V

OL

+ 0.15V V

OL

+ 0.15V V

OL

+ 0.3V V

OL

+ 0.3V

V

Y

V

OH

- 0.15V V

OH

- 0.15V V

OH

- 0.3V V

OH

- 0.3V

t

r

= t

r

<2.0ns <2.0ns <2.5ns <2.5ns

74LVC244A

6/9

WAVEFORM 1: PROPAGATION DELAYS (f=1MHz; 50% duty cycle)

WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% duty cycle)

74LVC244A

7/9

DIM.

mm. inch

MIN. TYP MAX. MIN. TYP. MAX.

A 2.65 0.104
a1 0.1 0.2 0.004 0.008
a2 2.45 0.096

b 0.35 0.49 0.014 0.019

b1 0.23 0.32 0.009 0.012

C 0.5 0.020
c1 45° (typ.)

D 12.60 13.00 0.496 0.512

E 10.00 10.65 0.393 0.419

e 1.27 0.050

e3 11.43 0.450

F 7.40 7.60 0.291 0.300

L 0.50 1.27 0.020 0.050
M 0.75 0.029
S8° (max.)

SO-20 MECHANICAL DATA

PO13L

74LVC244A

8/9

DIM.

mm. inch

MIN. TYP MAX. MIN. TYP. MAX.

A 1.2 0.047

A1 0.05 0.15 0.002 0.004 0.006

A2 0.8 1 1.05 0.031 0.039 0.041

b 0.19 0.30 0.007 0.012

c 0.09 0.20 0.004 0.0089

D 6.4 6.5 6.6 0.252 0.256 0.260

E 6.2 6.4 6.6 0.244 0.252 0.260

E1 4.3 4.4 4.48 0.169 0.173 0.176

e 0.65 BSC 0.0256 BSC

K0° 8°0° 8°

L 0.45 0.60 0.75 0.018 0.024 0.030

TSSOP20 MECHANICAL DATA

c

E

b

A2

A

E1

D

1

PIN 1 IDENTIFICATION

A1

L

K

e

0087225C

74LVC244A

9/9

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