DS90C031BTM datasheet(6/12 Pages) NSC

6 / 12 page

Applications Information (Continued)

The TRI-STATE function allows the driver outputs to be dis-

abled, thus obtaining an even lower power state when the

transmission of data is not required.

The footprint of the DS90C031B is the same as the industry

standard 26LS31 Quad Differential (RS-422) Driver.

The DS90C031B is electrically similar to the DS90C031, but

differs by supporting high impedance LVDS outputs under

power-off condition. This allows for multiple or redundant

drivers to be used in certain applications. The DS90C031B is

offered in a 300 mil. wide SOIC, allowing direct conversion to

Quad PECL drivers to LVDS. It is also offered in a space sav-

ing narrow SOIC (150 mil.) package.

For additional LVDS application information, please refer to

National’s LVDS Owner’s Manual available through Nation-

al’s website www.national.com/appinfo/lvds.

Pin Descriptions

Pin No.

Name

Description

1, 7, 9, 15

Driver input pin, TTL/CMOS compatible

2, 6, 10, 14

OUT+

Non-inverting driver output pin, LVDS levels

3, 5, 11, 13

OUT−

Inverting driver output pin, LVDS levels

Active high enable pin, OR-ed with EN*

EN*

Active low enable pin, OR-ed with EN

Power supply pin, +5V ± 10%

GND

Ground pin

Ordering Information

Operating

Package Type/

Order Number

Temperature

Number

−40˚C to +85˚C

SOP/M16A

DS90C031BTM

−40˚C to +85˚C

SOP/M16B

DS90C031BTWM

DS100989-9

FIGURE 7. Driver Output Levels

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