DS90C031BTWM datasheet(1/12 Pages) NSC

Part #	DS90C031BTWM

Description	LVDS Quad CMOS Differential Line Driver

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Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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DS90C031B

LVDS Quad CMOS Differential Line Driver

General Description

The DS90C031B is a quad CMOS differential line driver de-

signed for applications requiring ultra low power dissipation

and high data rates. The device is designed to support data

rates in excess of 155.5 Mbps (77.7 MHz) utilizing Low Volt-

age Differential Signaling (LVDS) technology.

The DS90C031B accepts TTL/CMOS input levels and trans-

lates them to low voltage (350 mV) differential output sig-

nals. In addition the driver supports a TRI-STATE® function

that may be used to disable the output stage, disabling the

load current, and thus dropping the device to an ultra low idle

power state of 11 mW typical.

In addition, the DS90C031B provides power-off high imped-

ance LVDS outputs. This feature assures minimal loading ef-

fect on the LVDS bus lines when V

CC is not present.

The DS90C031B and companion line receiver (DS90C032B)

provide a new alternative to high power pseudo-ECL devices

for high speed point-to-point interface applications.

Features

n >155.5 Mbps (77.7 MHz) switching rates

n High impedance LVDS outputs with power-off

n ±350 mV differential signaling

n Ultra low power dissipation

n 400 ps maximum differential skew (5V, 25˚C)

n 3.5 ns maximum propagation delay

n Industrial operating temperature range

n Pin compatible with DS26C31, MB571 (PECL) and

41LG (PECL)

n Conforms to ANSI/TIA/EIA-644 LVDS standard

n Offered in narrow and wide body SOIC package

n Fail-safe logic for floating inputs

Connection Diagram

Functional Diagram

Driver Truth Table

Enables

Input

Outputs

EN

EN*

D

IN

D

OUT+

D

OUT−

LH

X

Z

All other combinations

L

H

of ENABLE inputs

H

L

TRI-STATE® is a registered trademark of National Semiconductor Corporation.

Dual-In-Line

DS100989-1

Order Number

DS90C031BTM,

or DS90C031BTWM

See NS Package Number

M16A or M16B

DS100989-2

March 1999

DS100989

www.national.com

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