DESCRIPTION

KEY FEA TURES

s 3.5pF OUTPUT CAPACITANCE DURING

DISCONNECT

s HOT SWAP COMPATIBLE

s 60µA SUPPLY CURRENT IN DISCON-

NECT MODE

s 600µA SUPPLY CURRENT DURING

NORMAL OPERATION

s 150mA 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: 5204TR

The LX5204 is a nine-line active terminator

for the SCSI parallel bus. This SCSI standard

recommends active termination at both

ends of the SCSI bus. The LX5204 has the

added features of hot swappability, fully

complying with the SCSI hot swap speci-

fication.

During disconnect mode, the LX5204 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 LX5204

consumes only 600µA of current, which is

the lowest enabled supply current of any

terminator available on the market today.

Linfinity's proprietary BiCMOS low dropout

regulator architecture enables this unique

and very efficient operating characteristic.

The LX5204 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 LX5204 sinks up to 150mA of current,

making it compatible with today's fast

active negation drivers.

The LX5204 is a superior, pin-for-pin

replacement for a variety of industry prod-

ucts such as the UC5603 and UC5613.

P ACKAGE ORDER INFORMA TION

T

PWP

Plastic SOIC

16-pin, Power

DP

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

Append the letter "T" to part number. (i.e. LX5204CDPT)

0 to 70

LX5204CPWP

LX5204CDP

Plastic TSSOP

24-pin, Power

OF

LX5204

PRODUCT HIGHLIGHT

Receiver

LX5204

LX5204

LX5268

LX5268

1 Meter, AWG 28

Driver

Copyright © 1997

Rev. 1.1

12/96

1

NOTE:

For An In-Depth

Discussion On Applying

SCSI, Request Linfinity

Application Note:

"Understanding The

Single-Ended SCSI Bus"

IMPORTANT: For the most current data, consult LinFinity's web site: http://www.linfinity.com.