LIN DOC #: 5204
LX5204
9-LINE HOT SWAP, µPOWER SCSI TERMINATOR
P R O D U C T I O N D A T A S H E E T
T H E I N F I N I T E P O W E R O F I N N O V A T I O N
DESCRIPTION
KEY FEATURES
■ 3.5pF OUTPUT CAPACITANCE DURING
The LX5204 is a nine-line active terminator
fortheSCSIparallelbus. ThisSCSIstandard
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-
quiresameager60µAofsupplycurrentwhile
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
resistorsandplacingtheinternallowdropout
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
DISCONNECT
■ HOT SWAP COMPATIBLE
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.
■ 60µA SUPPLY CURRENT IN DISCON-
NECT MODE
■ 600µA SUPPLY CURRENT DURING
NORMAL OPERATION
■ 150mA SINK CURRENT FOR ACTIVE
NEGATION
■ LOGIC COMMAND DISCONNECTS ALL
TERMINATION LINES
■ CURRENT LIMIT AND THERMAL
PROTECTION
■ COMPATIBLE WITH SCSI 1, 2 AND 3
STANDARDS
■ CONSULT FACTORY FOR APPLICATION
TEST REPORT: 5204TR
The LX5204 is a superior, pin-for-pin
replacement for a variety of industry prod-
ucts such as the UC5603 and UC5613.
IMPORTANT: For the most current data, consult LinFinity's web site: http://www.linfinity.com.
PRODUCT HIGHLIGHT
RECEIVING WAVEFORM - 10MHZ
DRIVING WAVEFORM - 10MHZ
Receiver
Driver
NOTE:
For An In-Depth
1 Meter, AWG 28
Discussion On Applying
SCSI, Request Linfinity
Application Note:
"Understanding The
Single-Ended SCSI Bus"
LX5204
LX5204
LX5268
LX5268
PACKAGE ORDER INFORMATION
Plastic TSSOP
24-pin, Power
Plastic SOIC
16-pin, Power
TA (°C)
PWP
DP
0 to 70
LX5204CPWP
LX5204CDP
Note: All surface-mount packages are available in Tape & Reel.
Append the letter "T" to part number. (i.e. LX5204CDPT)
L I N F I N I T Y M I C R O E L E C T R O N I C S I N C .
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570
Copyright © 1997
Rev. 1.1 12/96
1