Philips 74lvc240a DATASHEETS

INTEGRATED CIRCUITS

74LVC240A

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

Product specification IC24 Data Handbook

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1998 May 20

Philips Semiconductors Product specification

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

FEA TURES

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

•Supply voltage range of 1.2V to 3.6V

•Complies with JEDEC standard no. 8-1A

•CMOS low power consumption

•Direct interface with TTL levels

•High impedance when V

QUICK REFERENCE DATA

GND = 0 V; T

SYMBOL

t

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

f

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

o

 (C

L

2. The condition is V

= 25°C; tr = tf 2.5 ns

amb

2

x fi +  (CL x V

CC

2

x V

x fo) = sum of outputs.

CC

= 0V

CC

PARAMETER CONDITIONS TYPICAL UNIT

Propagation delay 1An to 1Y 2An to 2Y

Input capacitance 5.0 pF Power dissipation capacitance per

buffer

= GND to V

I

n; n

CC

2

x fo) where:

CL = 50pF VCC = 3.3V 3.5

Notes 1 and 2 20 pF

74L VC240A

DESCRIPTION

The 74LVC240A 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 ‘240A is an octal non-inverting buffer/line driver with 3-State outputs. The 3-State outputs are controlled by the output enable inputs 1OE 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 ’240’ is functionally identical to the ’244’, but the ’244’ has inverting outputs.

and 2OE. A HIGH on nOE causes the outputs to

ns

ORDERING INFORMATION

PACKAGES

20-Pin Plastic Small Outline (SO) –40°C to +85°C 74LVC240A D 74LVC240A D SOT163-1 20-Pin Plastic Shrink Small Outline (SSOP) Type II –40°C to +85°C 74LVC240A DB 74LVC240A DB SOT339-1 20-Pin Plastic Thin Shrink Small Outline (TSSOP) Type I –40°C to +85°C 74LVC240A PW 7LVC240APW DH SOT360-1

TEMPERATURE

RANGE

OUTSIDE

NORTH AMERICA

NORTH AMERICA PKG. DWG. #

1998 May 20 853-1981 19419

2

Philips Semiconductors Product specification

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

PIN DESCRIPTION

PIN NUMBER SYMBOL FUNCTION

1 1OE Output enable input (active LOW) 2, 4, 6, 8 1A0 to 1A3Data 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 power supply

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 H L H L

H X Z

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

LOGIC SYMBOL

1A

2

0

2A

17

0

1A

4

1

2A

15

1

1A

6

2

2A

13

2

1A

8

3

2A

11

3

1

1OE

19

2OE

FUNCTIONAL DIAGRAM

1A

2

0

1A

4

1

74LVC240A

nY

n

1Y

18

0

2Y

3

0

1Y

16

1

2Y

5

1

1Y

14

2

2Y

7

2

1Y

12

3

2Y

9

3

SV00608

1Y

18

0

1Y

16

1

LOGIC SYMBOL (IEEE/IEC)

1

EN

2

4 6 8

19

EN

11

13 15 17

1998 May 20

SV00611

1A

6

2

1A

8

3

1OE

1

2A

17

18

16 14 12

9

7 5 3

0

2A

15

1

2A

13

2

2A

11

3

19

2OE

1Y

2

1Y

3

2Y

0

2Y

1

2Y

2

2Y

3

SV00610

14

12

3

5

7

9

3

Philips Semiconductors Product specification

SYMBOL

PARAMETER

CONDITIONS

UNIT

O

V

mW

Octal buffer/line driver with 5-volt

74LVC240A

tolerant inputs/outputs; inverting (3-State)

RECOMMENDED OPERATING CONDITIONS

LIMITS

MIN MAX

V

CC

V

CC

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

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 V DC supply voltage (for low-voltage applications) 1.2 3.6 V 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 t0 –50 mA DC input voltage Note 2 –0.5 to +6.5 V DC output diode current V

uVCC or VO t 0 "50 mA

O

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 "100 mA

CC

"50 mA

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

1998 May 20

4