Philips 74lvc2244a DATASHEETS

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74LVC2244A

Octal buffer/line driver with 30 Ω
series termination resistors; 5 V
input/output tolerant; 3-state

Product specification
File under Integrated Circuits, IC24

1999 Sep 30

Philips Semiconductors Product specification

Octal buffer/line driver with 30 Ω series termination
resistors; 5 V input/output tolerant; 3-state

FEATURES

• 5 V tolerant inputs/outputs for interfacing with 5 V logic

• Wide supply voltage range of 1.2 to 3.6 V

• CMOS low power consumption

• Direct interface with TTL levels

• Integrated 30 Ω termination resistors.

QUICK REFERENCE DATA

Ground = 0 V; T

=25°C; tr=tf≤2.5 ns.

amb

DESCRIPTION

The 74LVC2244A is a high-performance, low-power,
low-voltage, Si-gate CMOS device, superior to most
advanced CMOS compatible TTL families.

Inputs can be driven from either 3.3 or 5 V devices. In
3-state operation,outputs can handle 5 V. These features
allow the use of these devices as translators in a mixed

3.3/5 V environment.
The 74LVC2244A is an octal non-inverting buffer/line

driver with 3-state outputs. The 3-state outputs are
controlled by the output enable inputs 1OE and 2OE. A
HIGH on nOE causes the outputs to assume a
high-impedance OFF-state. Schmitt-trigger action at all
inputsmakes the circuit highly tolerant for slower input rise
and fall times. The 74LVC2244A is designed with 30 Ω
series termination resistors in both HIGH and LOW output
stages to reduce line noise.

74LVC2244A

SYMBOL PARAMETER CONDITIONS TYPICAL UNIT

t

PHL/tPLH

C

I

C

PD

propagation delay 1Anto 1Yn; 2Anto 2Y

n

CL= 50 pF; VCC= 3.3 V 4.0 ns
input capacitance 5.0 pF
power dissipation capacitance per buffer VI= GND to VCC; note 1 25 pF

Note

1. C

is used to determine the dynamic power dissipation (PDin µW).

PD

PD=CPD× V

2

× fi+ Σ(CL× V

CC

2

× fo) where:

CC

fi= input frequency in MHz;
fo= output frequency in MHz;
CL= output load capacitance in pF;

= supply voltage in Volts;

V

CC

Σ(CL× V

2

× fo) = sum of the outputs.

CC

1999 Sep 30 2

Philips Semiconductors Product specification

Octal buffer/line driver with 30 Ω series termination

74LVC2244A

resistors; 5 V input/output tolerant; 3-state

FUNCTION TABLE

See note 1.

INPUT OUTPUT

OE nA

n

n

LL L
LH H

HX Z

Note

1. H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
Z = high-impedance OFF-state.

ORDERING INFORMATION

PACKAGE

OUTSIDE NORTH

AMERICA

NORTH AMERICA

TEMPERATURE

RANGE

PINS PACKAGE MATERIAL CODE

74LVC2244AD 74LVC2244AD −40 to +85 °C 20 SO plastic SOT163-1
74LVC2244ADB 74LVC2244ADB 20 SSOP plastic SOT339-1
74LVC2244APW 74LVC2244APW DH 20 TSSOP plastic SOT360-1

nY

n

PINNING

PIN SYMBOL DESCRIPTION

11
2, 4, 6, 8 1A
3, 5, 7, 9 2Y

OE output enable input (active LOW)

to 1A

0

to 2Y

0

3
3

data inputs

bus outputs
10 GND ground (0 V)
11, 13, 15, 17 2A
12, 14, 16, 18 1Y
19 2
20 V

to 2A

3

to 1Y

3

0
0

data inputs

bus outputs

OE output enable input (active LOW)

CC

DC supply voltage

1999 Sep 30 3

Philips Semiconductors Product specification

Octal buffer/line driver with 30 Ω series termination
resistors; 5 V input/output tolerant; 3-state

handbook, halfpage

1OE

1A
2Y

1A
2Y
1A
2Y
1A
2Y

GND

1
2

0

3

0

4

1

5

1
2
2
3
3

2244

6
7
8
9

10

MNA357

V

20

CC

19

2OE
1Y

18

0

2A

17

0

1Y

16

1

2A

15

1

1Y

14

2

2A

13

2

1Y

12

3

2A

11

3

handbook, halfpage

74LVC2244A

1A

0

2

1A

1

4

1A

2

6

1Y

1Y

1Y

0

18

1

16

2

14

handbook, halfpage

Fig.1 Pin configuration.

1

EN

2
4

6
8

19

EN

17
15

13
11

MNA359

18
16

14
12

3
5

7
9

1A

3

8

1OE

1

2A

2A

2A

2A

2OE

0

1

2

3

17

15

13

11

19

1Y

2Y

2Y

2Y

2Y

MNA360

3

12

0

3

1

5

2

7

3

9

1999 Sep 30 4

Fig.2 Functional diagram.Fig.3 IEC logic symbol.

Philips Semiconductors Product specification

Octal buffer/line driver with 30 Ω series termination

74LVC2244A

resistors; 5 V input/output tolerant; 3-state

RECOMMENDED OPERATING CONDITIONS

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

V

CC

V

I

V

O

T

amb

t

r,tf

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134). Voltages are referenced to GND (ground = 0 V).

DC supply voltage

for max. speed performance 2.7 3.6 V

for low-voltage applications 1.2 3.6 V
DC input voltage 0 5.5 V
DC output voltage

output HIGH or LOW state 0 V

CC

V

3-state 0 5.5 V
operating ambient temperature see DC and AC characteristics per

−40 +85 °C

device

input rise and fall times VCC= 1.2 to 2.7 V 0 20 ns/V

V

= 2.7 to 3.6 V 0 10

CC

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

V

CC

I

IK

V

I

I

OK

V

O

DC supply voltage −0.5 +6.5 V
DC input diode current VI<0 −−50 mA
DC input voltage note 1 −0.5 +5.5 V
DC output diode current VO>VCC or VO<0 −±50 mA
DC output voltage

output HIGH or LOW note 1 −0.5 V

+ 0.5 V

CC

output 3-state note 1 −0.5 +6.5 V

I

O

I

, I

CC

T

stg

P

tot

DC output diode current VO=0toV
DC VCC or GND current −±100 mA

GND

CC

−±50 mA

storage temperature −65 +150 °C
power dissipation per package

plastic mini-pack (SO) note 2 − 500 mW

plastic shrink mini-pack (SSOP and

note 3 − 500 mW

TSSOP)

Notes

1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.

2. For SO package: above 70 °C the value of P

3. For SSOP and TSSOP package: above 60 °C the value of P

derates linearly with 8 mW/K.

tot

derates linearly with 5.5 mW/K.

tot

1999 Sep 30 5