P ACKAGE ORDER INFO

T

0 to 70

LX5208CDWP

Plastic SOWB

28-pin, Power

DWP

Note: All surface-mount packages are available in Tape & Reel.

Append the letter "T" to part number. (i.e. LX5208CDWPT)

FOR FUR THER INFORMA TION CALL (714) 898-8121

1

OF

LX5208

DESCRIPTION

KEY FEA TURES

s 3.5pF OUTPUT CAPACITANCE DURING

DISCONNECT

s 60µA SUPPLY CURRENT IN DISCON-

NECT MODE

s 800µA SUPPLY CURRENT DURING

NORMAL OPERATION

s 200mA SINK CURRENT FOR ACTIVE

NEGATION

s LOGIC COMMAND DISCONNECTS ALL

TERMINATION LINES

s CURRENT LIMIT AND THERMAL

PROTECTION

s COMPATIBLE WITH SCSI 1, 2 AND 3

STANDARDS

s CONSULT FACTORY FOR APPLICATION

TEST REPORT: 5208TR

The LX5208 is an eighteen-line active termi-

nator for the SCSI parallel bus.

This SCSI

standard recommends active termination at

both ends of the SCSI bus.

During disconnect mode, the LX5208 re-

quires a meager 60µA of supply current while

offering only 3.5pF of output capacitance.

To enter this low-power mode, the discon-

nect pin can be left open (floating) or driven

high, thereby disconnecting the terminating

resistors and placing the internal low dropout

regulator into low-power mode. In discon-

nect mode, each termination line presents

a high impedance to the SCSI bus with the

overall effect being to preserve high signal

integrity and yield subsequent reliable, error

free communications.

During normal operation, the LX5208 con-

sumes only 800µA of current, which is the

lowest enabled supply current of any termi-

nator available on the market today.

Linfinity's proprietary BiCMOS low dropout

regulator architecture enables this unique

and very efficient operating characteristic.

The LX5208 also offers a precisely trimmed

channel output current specified to a 5%

tolerance. The maximum value of the output

current is trimmed as closely as possible to

the SCSI standard maximum specification to

give the highest possible noise margin for

fast SCSI operation. And the LX5208 sinks

up to 200mA of current making it compatible

with today's fast active negation drivers.

The LX5208 is a superior, pin-for-pin re-

placement for a variety of industry products

such as the UC5601, UC5602, UC5608, and

UC5609.

Copyright © 1998

Rev. 1.9

3/98

PRODUCT HIGHLIGHT

Receiver

LX5208

LX5208

LX5268

LX5268

1 Meter, AWG 28

Driver

NOTE:

For An In-Depth

Discussion On Applying

SCSI, Request Linfinity

Application Note:

"Understanding The

Single-Ended SCSI Bus"