Datasheet 74LVCH244AD, 74LVCH244ADB, 74LVC244ADB, 74LVC244AD, 74LVCH244APW Datasheet (Philips)

INTEGRATED CIRCUITS

74LVC244A/74LVCH244A

Octal buffer/line driver with 5-volt tolerant
inputs/outputs (3-State)title

Product specification
Supersedes data of 1996 Sep 06
IC24 Data Handbook




1998 May 20

Philips Semiconductors Product specification

t

1A

1Y

V

3V

3.5

ns

Octal buffer/line driver with 5-volt
tolerant inputs/outputs (3-State)

FEA TURES

•5-volt tolerant inputs/outputs, for interfacing with 5-volt logic

•Supply voltage range of 2.7V to 3.6V

•Complies with JEDEC standard no. 8-1A

•CMOS low power consumption

•Direct interface with TTL levels

•High impedance when V

•Bushold on all data inputs (74LVCH244A only)

CC

= 0V

DESCRIPTION

The 74LVC244A/74LVCH244A 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 3.3V or 5V devices. In 3-State
operation, outputs can handle 5V. These features allow the use of
these devices as translators in a mixed 3.3V/5V environment.

The 74LVC244A/74LVCH244A is an octal non-inverting buffer/line
driver with 3-State outputs. The 3-State outputs are controlled by the
output enable inputs 1OE
outputs to assume a high impedance OFF-state. Schmitt-trigger
action at all inputs makes the circuit highly tolerant for slower input
rise and fall times.

The ’244’ is functionally identical to the ’240’, but the ’240’ has
non-inverting outputs.

and 2OE. A HIGH on nOE causes the

74L VC244A

74L VCH244A

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS TYPICAL UNIT

Propagation delay

to

n

PHL/tPLH

C

I

C

PD

NOTE:

is used to determine the dynamic power dissipation (PD in W):

1. C

PD

= CPD x V

P

D

= input frequency in MHz; CL = output load capacity in pF;

f

i

= output frequency in MHz; VCC = supply voltage in V;

f

o

 (C

L

2. The condition is V

CC

2

x V

x fo) = sum of outputs.

CC

2An to 2Y
Input capacitance 4.4 pF

Power dissipation capacitance per
buffer

2

x fi +  (CL x V

= GND to V

I

n;
n

CC

CC

2

x fo) where:

CL = 50pF

= 3.

CC

Notes 1 and 2 22.6 pF

ORDERING INFORMATION

PACKAGES

20-Pin Plastic Shrink Small Outline (SO) –40°C to +85°C 74LVC244A D 74LVC244A D SOT163-1
20-Pin Plastic Shrink Small Outline (SSOP) Type II –40°C to +85°C 74LVC244A DB 74LVC244A DB SOT339-1
20-Pin Plastic Thin Shrink Small Outline (TSSOP) Type I –40°C to +85°C 74LVC244A PW 7LVC244APW DH SOT360-1
20-Pin Plastic Shrink Small Outline (SO) –40°C to +85°C 74LVCH244A D 74LVCH244A D SOT163-1
20-Pin Plastic Shrink Small Outline (SSOP) Type II –40°C to +85°C 74LVCH244A DB 74LVCH244A DB SOT339-1
20-Pin Plastic Thin Shrink Small Outline (TSSOP) Type I –40°C to +85°C 74LVCH244A PW LVCH244APW DH SOT360-1

TEMPERATURE

RANGE

OUTSIDE

NORTH AMERICA

NORTH AMERICA PKG. DWG. #

1998 May 20 853-1876 19419

2

Philips Semiconductors Product specification

Octal buffer/line driver with 5-volt
tolerant inputs/outputs (3-State)

PIN DESCRIPTION

PIN NUMBER SYMBOL FUNCTION

1 1OE Output enable input (active LOW)
2, 4, 6, 8 1A0 to 1A‘3Data inputs
3, 5, 7, 9 2Y0 to 2Y3Bus outputs

10 GND Ground (0V)

17, 15, 13, 11 2A0 to 2A3Bus inputs

18, 16, 14, 12 1Y0 to 1Y3Bus outputs

19 2OE Output enable input (active-LOW)
20 V

CC

PIN CONFIGURATION

1OE
1A0
2Y0
1A1
2Y1

1A2
2Y2
1A3
2Y3 1Y3

GND

Positive supply voltage

1
2
3
4
5
6
7
8
9

10 11

SV00212

20

V

CC

2OE

19

1Y0

18

2A0

17

1Y1

16

2A1

15

1Y2

14

2A2

13
12

2A3

FUNCTION TABLE

INPUTS OUTPUT

nOE nA

n

L L L
L H H

H X Z

H = HIGH voltage level
L = LOW voltage level
X = Don’t care
Z = High impedance OFF-state

LOGIC SYMBOL

1A

1A

1A

1A

1OE

2

0

4

1

6

2

8

3

1

18

1Y

0

16

1Y

1

14

1Y

2

12

1Y

3

FUNCTIONAL DIAGRAM

1A

0

2

74LVC244A

74LVCH244A

nY

n

17

2A

0

15

2A

1

13

2A

2

11

2A

3

19

2OE

1Y

18

0

3

2Y

5

2Y

7

2Y

9

2Y

SV00210

o

1

2

3

LOGIC SYMBOL (IEEE/IEC)

1

EN

2
4
6
8

19

EN

11 9
13 7
15 5
17 3

1998 May 20

18
16
14
12

SV00209

1A

1

4

1A

2

6

1A

3

8

1OE

1

2A

0

17

2A

1

15

2A

2

13

2A

3

11

2OE

19

1Y

1

1Y

2

1Y

3

2Y

o

2Y

1

2Y

2

2Y

3

SV00211

16

14

12

3

5

7

9

3

Philips Semiconductors Product specification

SYMBOL

PARAMETER

CONDITIONS

UNIT

DC suppl

oltage (for ma

speed performance)

2.7

3.6

V

V

O

V

V

mW

Octal buffer/line driver with 5-volt
tolerant inputs/outputs (3-State)

74LVC244A

74LVCH244A

RECOMMENDED OPERATING CONDITIONS

LIMITS

MIN MAX

pp

CC

V

DC supply voltage (for low-voltage applications) 1.2 3.6
DC Input voltage range 0 5.5 V

I

y v

DC Output voltage range; output HIGH or LOW

V

state
DC output voltage range; output 3-State 0 5.5

T

tr, t

amb

Operating ambient temperature range in free-air –40 +85 °C
Input rise and fall times

f

ABSOLUTE MAXIMUM RATINGS

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

SYMBOL

V

CC

I

IK

V

I

OK

DC supply voltage –0.5 to +6.5 V
DC input diode current VI 0 –50 mA
DC input voltage Note 2 –0.5 to +6.5 V

I

DC output diode current V
DC output voltage; output HIGH or LOW state Note 2 –0.5 to VCC +0.5

O

DC output voltage; output 3-State Note 2 –0.5 to 6.5

I

GND

I

O

T

stg

DC output source or sink current VO = 0 to V

, I

DC VCC or GND current 100 mA

CC

Storage temperature range –65 to +150 °C
Power dissipation per package

P

TOT

– plastic mini-pack (SO) above +70°C derate linearly with 8 mW/K 500
– plastic shrink mini-pack (SSOP and TSSOP) above +60°C derate linearly with 5.5 mW/K 500

NOTES:

1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the
device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to
absolute-maximum-rated conditions for extended periods may affect device reliability .

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

PARAMETER CONDITIONS RATING UNIT

x.

p

p

VCC = 1.2 to 2.7V
VCC = 2.7 to 3.6V

0 V

0
0

20
10

CC

V

ns/V

1

VCC or VO  0 50 mA

O

CC

50 mA

1998 May 20

4

Philips Semiconductors Product specification

VIHHIGH level Input voltage

V

VILLOW level Input voltage

V

VOHHIGH level output voltage

V

IIInput leakage current

V

V

GND

0.1

5µA

Octal buffer/line driver with 5-volt
tolerant inputs/outputs (3-State)

74LVC244A

74LVCH244A

DC ELECTRICAL CHARACTERISTICS

Over recommended operating conditions voltages are referenced to GND (ground = 0V)

LIMITS

SYMBOL PARAMETER TEST CONDITIONS Temp = -40°C to +85°C UNIT

MIN TYP1MAX

p

p

VCC = 1.2V V
VCC = 2.7 to 3.6V 2.0
VCC = 1.2V GND
VCC = 2.7 to 3.6V 0.8
VCC = 2.7V; VI = VIH or VIL;IO = –12mA VCC0.5

p

VCC = 3.0V; VI = VIH or VIL;IO = –100µA VCC0.2 V
VCC = 3.0V; VI = VIH or V
VCC = 3.0V; VI = VIH or V

= –18mA VCC0.6

IL;IO

= –24mA VCC0.8

IL;IO

VCC = 2.7V; VI = VIH or VIL;IO = 12mA 0.40

V

OL

I

OZ

I

off

I

CC

∆I

I

BHL

I

BHH

I

BHLO

I

BHHO

LOW level output voltage

p
3-State output OFF-state current VCC = 3.6V; VI = VIH or VIL;VO = 5.5V or GND 0.1 5 µA
Power off leakage supply VCC = 0.0V; V
Quiescent supply current VCC = 3.6V; VI = VCC or GND; IO = 0 0.1 10 µA
Additional quiescent supply current

CC

per input pin
Bushold LOW sustaining

2, 3, 4

current
Bushold HIGH sustaining

2, 3, 4

current
Bushold LOW overdrive current2
Bushold HIGH overdrive current2

VCC = 3.0V; VI = VIH or VIL;IO = 100µA GND 0.20
VCC = 3.0V; VI = VIH or V

;

= 3.6V;

CC

= 5.5V or

I

or VO = 5.5V 0.1 10 µA

I

= 24mA 0.55

IL;IO

VCC = 2.7V to 3.6V; VI = VCC –0.6V; IO = 0 5 500 µA

VCC = 3.0V; V

VCC = 3.0V; V

, 3, 5

VCC = 3.6V 500 – – µA

, 3, 5

VCC = 3.6V –500 – – µA

=0.8V 75 – – µA

I

=2.0V –75 – – µA

I

NOTES:

1. All typical values are at V

2. Valid for data inputs of bushold parts (LVCH-A) only.

= 3.3V and T

CC

amb

= 25°C.

3. For data inputs only, control inputs do not have a bushold circuit

4. The specified sustaining current at the data inputs do not have a bushold circuit.

5. The specified overdrive current at the data input forces the data input to the opposite logic input state.

6. For bushold parts, the bushold circuit is switched off when V

exceeds VCC allowing 5.5V on the input terminal.

I

CC

CC

V

1998 May 20

5

Philips Semiconductors Product specification

Octal buffer/line driver with 5-volt
tolerant inputs/outputs (3-State)

74LVC244A

74LVCH244A

AC CHARACTERISTICS

GND = 0V; tr = tf v 2.5ns; CL = 50pF; RL = 500Ω; T

SYMBOL PARAMETER WAVEFORM VCC = 3.3V ±0.3V VCC = 2.7V VCC = 1.2V UNIT

t

PHL

t

PLH

t

PZH

t

PZL

t

PHZ

t

PLZ

Propagation delay
1An to 1Yn;
2An to 2Y

n

3-State output enable time
1OE

to 1Yn;

2OE to 2Y

n

3-State output disable time
1OE to 1Yn;
2OE to 2Y

n

NOTE:

1. Unless otherwise stated, all typical values are at V

AC WAVEFORMS

VM = 1.5 V at VCC w 2.7 V; VM = 0.5 VCC at VCC < 2.7 V
V

and VOH are the typical output voltage drop that occur with the

OL

output load.
V

= VOL + 0.3V at VCC ≥ 2.7V; VX = VOL + 0.1 VCC at VCC < 2.7V

X

= VOH – 0.3V at VCC ≥ 2.7V; VY = VOH – 0.1 VCC at VCC < 2.7V

V

Y

V

I

INPUT

GND
V

OH

OUTPUT

V

OL

Waveform 1. Input (Dn) to output (Qn) propagation delays.

V

I

nOE INPUT

GND

V

CC

Q

OUTPUT

n

LOW-to-OFF
OFF-to-LOW

V

OL

V

OH

Q

OUTPUT

n

HIGH-to-OFF
OFF-to-HIGH

GND

Waveform 2. 3-State enable and disable times.

V

M

t

PHL

V

M

t

outputs
enabled

PLZ

t

PHZ

V

M

V

X

V

Y

outputs
disabled

= –40°C to +85°C.

amb

LIMITS

MIN TYP

1

MAX MIN MAX TYP

1, 3 1.5 3.5 5.9 1.5 6.9 16.0 ns

2, 3 1.5 4.3 7.6 1.5 8.6 19.0 ns

2, 3 1.5 3.7 5.8 1.5 6.8 17.0 ns

= 3.3V and T

CC

amb

= 25°C.

TEST CIRCUIT

V

CC

t

t

PZL

PLH

t

PZH

SY00041

V

M

V

M

outputs
enabled

SW00207

V

PULSE

GENERATOR

IN

R

T

Test Circuit for 3-State Outputs

SWITCH POSITION

TEST SWITCH

t

PLH/tPHL

t

PLZ/tPZL

t

PHZ/tPZH

Open

2<V

GND

CC

DEFINITIONS

RL =Load resistor
C

= Load capacitance includes jig and probe capacitance

L

=Termination resistance should be equal to Z

R

T

of pulse generators.

Waveform 3. Load circuitry for switching times.

D.U.T.

V

OUT

C

V

CC

t 2.7V

2.7 – 3.6V

L

V

IN

V

CC

2.7V

S

1

RL=500 Ω

RL=500 Ω

OUT

2<V

Open
GND

SW00047

CC

1998 May 20

6

Philips Semiconductors Product specification

Octal buffer/line driver with 5-volt
tolerant inputs/outputs (3-State)

SO20: plastic small outline package; 20 leads; body width 7.5 mm SOT163-1

74LVC244A

74LVCH244A

1998 May 20

7

Philips Semiconductors Product specification

Octal buffer/line driver with 5-volt
tolerant inputs/outputs (3-State)

SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm SOT339-1

74LVC244A

74LVCH244A

1998 May 20

8

Philips Semiconductors Product specification

Octal buffer/line driver with 5-volt
tolerant inputs/outputs (3-State)

TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm SOT360-1

74LVC244A

74LVCH244A

1998 May 20

9

Philips Semiconductors Product specification

Octal buffer/line driver with 5-volt
tolerant inputs/outputs (3-State)

Data sheet status

Data sheet
status

Objective
specification

Preliminary
specification

Product
specification

Product
status

Development

Qualification

Production

Definition

This data sheet contains the design target or goal specifications for product development.
Specification may change in any manner without notice.

This data sheet contains preliminary data, and supplementary data will be published at a later date.
Philips Semiconductors reserves the right to make chages at any time without notice in order to
improve design and supply the best possible product.

This data sheet contains final specifications. Philips Semiconductors reserves the right to make
changes at any time without notice in order to improve design and supply the best possible product.

[1]

74LVC244A

74LVCH244A

[1] Please consult the most recently issued datasheet before initiating or completing a design.

Definitions

Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For

detailed information see the relevant data sheet or data handbook.
Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one

or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or
at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended
periods may affect device reliability.

Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips
Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or
modification.

Disclaimers

Life support — These products are not designed for use in life support appliances, devices or systems where malfunction of these products can

reasonably be expected to result in personal injury . Philips Semiconductors customers using or selling these products for use in such applications
do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.

Right to make changes — Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard
cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless
otherwise specified.

Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone [phone]

 Copyright Philips Electronics North America Corporation 1998

All rights reserved. Printed in U.S.A.

print code Date of release: 05-96
Document order number: 9397-750-04502




yyyy mmm dd

10