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74LVT640DB

3.3V Octal transceiver with direction pin; inverting (3-State)

Philips Electronics 

Philips Semiconductors

3.3V Octal transceiver with direction pin; inverting

(3-State)

Product specification

74LVT640

FEATURES

• Octal bidirectional bus interface

• 3-State buffers

• Output capability: +64mA/-32mA

• TTL input and output switching levels

• Input and output interface capability to systems at 5V supply

• Bus-hold data inputs eliminate the need for external pull-up

resistors to hold unused inputs

• Live insertion/extraction permitted

• Power-up 3-State

• No bus current loading when output is tied to 5V bus

• Latch-up protection exceeds 500mA per JEDEC Std 17

• ESD protection exceeds 2000V per MIL STD 883 Method 3015

and 200V per Machine Model

DESCRIPTION

The LVT640 is a high-performance BiCMOS product designed for

VCC operation at 3.3V.

This device is an octal transceiver featuring inverting 3-State bus

compatible outputs in both send and receive directions. The control

function implementation minimizes external timing requirements.

The device features an Output Enable (OE) input for easy cascading

and a Direction (DIR) input for direction control.

QUICK REFERENCE DATA

SYMBOL

PARAMETER

tPLH

tPHL

CIN

CI/O

ICCZ

Propagation delay

An to Bn or Bn to An

Input capacitance

DIR, OE

I/O pin capacitance

Total supply current

CONDITIONS

Tamb = 25°C; GND = 0V

CL = 50pF;

VCC = 3.3V

VI = 0V or 3.0V

Outputs disabled; VI/O = 0V or 3.0V

Outputs disabled; VCC = 3.6V

TYPICAL

2.3

2.4

4

7

0.13

UNIT

ns

pF

pF

mA

ORDERING INFORMATION

PACKAGES

20-Pin Plastic SO

20-Pin Plastic SSOP

20-Pin Plastic TSSOP

TEMPERATURE RANGE

–40°C to +85°C

–40°C to +85°C

–40°C to +85°C

OUTSIDE NORTH AMERICA

74LVT640 D

74LVT640 DB

74LVT640 PW

NORTH AMERICA

74LVT640 D

74LVT640 DB

74LVT640PW DH

PKG. DWG. #

SOT163-1

SOT339-1

SOT360-1

PIN CONFIGURATION

DIR 1

A0 2

A1 3

A2 4

A3 5

A4 6

A5 7

A6 8

A7 9

GND 10

20 VCC

19 OE

18 B0

17 B1

16 B2

15 B3

14 B4

13 B5

12 B6

11 B7

SV00014

PIN DESCRIPTION

PIN NUMBER

SYMBOL NAME AND FUNCTION

1

DIR

Direction control input

2, 3, 4, 5, 6, 7, 8, 9 A0 – A7 Data inputs/outputs (A side)

18, 17, 16, 15, 14,

13, 12, 11

B0 – B7 Data inputs/outputs (B side)

19

OE

Output enable input

(active–Low)

10

GND Ground (0V)

20

VCC

Positive supply voltage

1998 Feb 19

2

853-1881 18988

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