DESCRIPTION

The LX5207 is an eighteen line active ter-

minator for the SCSI parallel bus. This SCSI

standard recommends active termination at

both ends of the SCSI bus.

During disconnect mode, the LX5207

requires a meager 500nA of supply current

while offering only 2.5pF of output capaci-

tance. To enter this low power mode, the

disconnect pin can be left open (floating)

or driven high thereby disconnecting the

terminating resistors and placing the inter-

nal low dropout regulator into low power

mode. In disconnect mode each termina-

tion line presents a high impedance to the

SCSI bus with the overall effect being to

preserve high signal integrity and subse-

quent reliable, error free communications.

During normal operation, the LX5207

consumes only 800µA of current which is

PRODUCT HIGHLIGHT

P ACKAGE ORDER INFO

T

0 to 70

LX5207CDWP

Plastic SOWB

28-pin, Power

DWP

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 LX5207 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

finally, the LX5207 sinks up to 100mA of

current making it compatible with today's

fast active negation drivers.

The LX5207 is a superior, pin-for-pin

replacement for a variety of industry prod-

ucts such as the UC5601, UC5602, UC5608,

and UC5609.

KEY FEA TURES

s 2.5pF OUTPUT CAPACITANCE DURING

DISCONNECT

s 500nA SUPPLY CURRENT IN DISCONNECT

MODE

s 800µA SUPPLY CURRENT DURING NORMAL

OPERATION

s 100mA SINK CURRENT FOR ACTIVE

NEGATION

s LOGIC COMMAND DISCONNECTS ALL

TERMINATION LINES

s CURRENT LIMIT AND THERMAL PROTEC-

TION

s COMPATIBLE WITH SCSI 1, 2, 3, AND

FAST-20 STANDARDS

s HOT SWAP COMPATIBLE

s CONSULT FACTORY FOR APPLICATION

TEST REPORT: 5207TR

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

1

OF

LX5207

Copyright © 1998

Rev. 1.5

3/98

Receiver

LX5207

LX5207

LX5268

LX5268

1 Meter, AWG 28

Driver

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

Append the letter "T" to part number. (i.e. LX5207CDWPT)

NOTE:

For An In-Depth

Discussion On Applying

SCSI, Request Linfinity

Application Note:

"Understanding The

Single-Ended SCSI Bus"