Datasheet 74LVCH245APW, 74LVC245APW, 74LVC245ADB, 74LVC245AD, 74LVCH245AD Datasheet (Philips)

INTEGRATED CIRCUITS

74LVC245A/74LVCH245A

Octal bus transceiver with direction pin
with 5-volt tolerant inputs/outputs
(3-State)

Product specification
Supersedes data of 1997 Dec 19
IC24 Data Handbook

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1998 May 20

Philips Semiconductors Product specification

Octal bus transceiver with direction pin 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

CC

= 0V

•Bushold on all data inputs (74LVCH245A only)

DESCRIPTION

The 74LVC245A/74LVCH245A 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 74LVC245A/74LVCH245A is an octal transceiver featuring
non-inverting 3-State bus compatible outputs in both send and
receive directions. The ’245’ features an output enable (OE
easy cascading and a send/receive (DIR) input for direction control.
OE

The ’245’ is functionally identical to the ’640’, but the ’640’ has true
(non-inverting) outputs.

controls the outputs so that the buses are effectively isolated.

74L VC245A

74L VCH245A

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS TYPICAL UNIT

Propagation delay

t

PHL/tPLH

C

I

C

I/O

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

f

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

o

 (C

L

2. The condition is V

CC

2

x V

x fo) = sum of outputs.

CC

An to B

n;

Bn to A

n

Input capacitance 5.0 pF
Input/output capacitance 10.0 pF
Power dissipation capacitance per

buffer

2

x fi +  (CL x V

= GND to V

I

CC

CC

2

x fo) where:

CL = 50pF
VCC = 3.3V 3.6

Notes 1 and 2 33 pF

) input for

ns

ORDERING INFORMATION

PACKAGES

20-Pin Plastic Shrink Small Outline (SO) –40°C to +85°C 74LVC245A D 74LVC245A D SOT163-1
20-Pin Plastic Shrink Small Outline (SSOP) Type II –40°C to +85°C 74LVC245A DB 74LVC245A DB SOT339-1
20-Pin Plastic Thin Shrink Small Outline (TSSOP) Type I –40°C to +85°C 74LVC245A PW 7LVC245APW DH SOT360-1
20-Pin Plastic Shrink Small Outline (SO) –40°C to +85°C 74LVCH245A D 74LVCH245A D SOT163-1
20-Pin Plastic Shrink Small Outline (SSOP) Type II –40°C to +85°C 74LVCH245A DB 74LVCH245A DB SOT339-1
20-Pin Plastic Thin Shrink Small Outline (TSSOP) Type I –40°C to +85°C 74LVCH245A PW LVCH245APW DH SOT360-1

TEMPERATURE

RANGE

OUTSIDE

NORTH AMERICA

NORTH AMERICA PKG. DWG. #

1998 May 20 853-2044 19419

2

Philips Semiconductors Product specification

Octal bus transceiver with direction pin with
5-volt tolerant inputs/outputs (3-State)

PIN CONFIGURATION

1

DIR

2

A0

3

A1

4

A2

5

A3

6

A4

7

A5

8

A6

9

A7

10 11

GND

PIN DESCRIPTION

PIN NUMBER SYMBOL FUNCTION

1 DIR Direction control

2, 3, 4, 5, 6,

7, 8, 9

A0 to A7Data inputs/outputs

10 GND Ground (0V)

18, 17, 16, 15,

14, 13, 12, 11

B0 to B7Data inputs/outputs

19 OE Output enable input (active-Low)
20 V

Positive supply voltage

CC

FUNCTION TABLE

INPUTS INPUTS/OUTPUTS

OE DIR

L L A = B Inputs
L H lnputs B = A

H X Z Z

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

An

20
19
18
17
16
15
14
13
12

SV00014

V
OE
B0
B1
B2
B3
B4
B5
B6
B7

CC

B

0

LOGIC SYMBOL

1

DIR

2

A0

3

A1

4

A2

5

A3

6

A4

7

A5

8

A6

9

A7

LOGIC SYMBOL (IEEE/IEC)

19

1

2

3

4

5
6

7

8

9

G3
3EN1 (BA)
3EN2 (AB)

∇ 1

74LVC245A

74LVCH245A

19

OE

18

B0

17

B1

16

B2

15

B3

14

B4

13

B5

12

B6

11

B7

SV00016

2 ∇

18

17

16

15
14

13

12

11

SV00208

1998 May 20

3

Philips Semiconductors Product specification

SYMBOL

PARAMETER

CONDITIONS

UNIT

V

V

O

V

V

mW

Octal bus transceiver with direction pin with
5-volt tolerant inputs/outputs (3-State)

74LVC245A

74LVCH245A

RECOMMENDED OPERATING CONDITIONS

LIMITS

MIN MAX

CC

V

V

T

amb

tr, t

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

I

OK

O

I

O

I

, I

GND

T

stg

P

TOT

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.

DC supply voltage (for max. speed performance) 2.7 3.6
DC supply voltage (for low-voltage applications) 1.2 3.6
DC Input voltage range 0 5.5 V

I

DC Output voltage range; output HIGH or LOW
state

0 V

CC

DC output voltage range; output 3-State 0 5.5
Operating ambient temperature range in free-air –40 +85 °C

Input rise and fall times

f

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

0
0

20
10

1

PARAMETER CONDITIONS RATING UNIT

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
DC output diode current V

VCC or VO  0

O

50
DC output voltage; output HIGH or LOW state Note 2 –0.5 to VCC +0.5
DC output voltage; output 3-State Note 2 –0.5 to 6.5
DC output source or sink current VO = 0 to V
DC VCC or GND current

CC

CC

50

100

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

– 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

V

ns/V

mA

mA
mA

1998 May 20

4

Philips Semiconductors Product specification

VIHHIGH level Input voltage

V

VILLOW level Input voltage

V

VOHHIGH level output voltage

V

Octal bus transceiver with direction pin with
5-volt tolerant inputs/outputs (3-State)

74LVC245A

74LVCH245A

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

I

OZ

I

off

I

CC

∆I

I

BHL

I

BHH

I

BHLO

I

BHHO

LOW level output voltage

Input leakage current

I

6

3-State output OFF-state current
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 current

2, 3, 5

Bushold HIGH overdrive current

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

= 24mA 0.55

IL;IO

VCC = 3.6V; VI = 5.5V or GND

6, 7

VCC = 3.6V; VI = VIH or VIL;VO = 5.5V or GND 0.1

or VO = 5.5V 0.1

I

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

VCC = 3.0V; V

VCC = 3.0V; V

=0.8V 75 – – µA

I

=2.0V –75 – – µA

I

VCC = 3.6V 500 – – µA

2, 3, 5

VCC = 3.6V –500 – – µA

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 input holds the input below the specified V

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

7. For I/O ports the parameter I

includes the input leakage current.

OZ

exceeds VCC allowing 5.5V on the input terminal.

I

level.

I

CC

CC

0.1 5

5

10

V

µA
µA
µA

1998 May 20

5

Philips Semiconductors Product specification

Octal bus transceiver with direction pin with
5-volt tolerant inputs/outputs (3-State)

74LVC245A

74LVCH245A

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
An to Bn;
Bn to A

n

3-State output enable time
OE

to An;

OE to B

n

3-State output disable time
OE to An;
OE to B

n

NOTE:

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

AC WAVEFORMS

VM = 1.5V at VCC w 2.7V; VM = 0.5 VCC at VCC t 2.7V.
V

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

OL

output load.
V

= VOL + 0.3V at VCC w 2.7V; VX = VOL + 0.1 VCC at VCC t 2.7V

X

V

= VOH –0.3V at VCC w 2.7V; VY = VOH – 0.1 VCC at VCC t 2.7V

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

outputs
enabled

V

M

t

PLZ

V

X

t

PHZ

V

Y

outputs
disabled

= –40°C to +85°C.

amb

LIMITS

MIN TYP

1

MAX MIN MAX TYP

1, 3 1.5 3.6 6.3 1.5 7.3 16 ns

2, 3 1.5 5.1 8.5 1.5 9.5 23 ns

2, 3 1.5 4.5 7.0 1.5 8.0 16 ns

= 3.3V and T

CC

amb

= 25°C.

TEST CIRCUIT

V

CC

t

t

PLH

PZL

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 bus transceiver with direction pin with 5-volt
tolerant inputs/outputs (3-State)

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

74LVC245A

74LVCH245A

1998 May 20

7

Philips Semiconductors Product specification

Octal bus transceiver with direction pin with 5-volt
tolerant inputs/outputs (3-State)

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

74LVC245A

74LVCH245A

1998 May 20

8

Philips Semiconductors Product specification

Octal bus transceiver with direction pin with 5-volt
tolerant inputs/outputs (3-State)

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

74LVC245A

74LVCH245A

1998 May 20

9

Philips Semiconductors Product specification

Octal bus transceiver with direction pin 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]

74LVC245A

74LVCH245A

[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: 9397-750-04503

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