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LX5205CDWPT

更新时间: 2024-11-07 23:48:55
品牌 Logo 应用领域
美高森美 - MICROSEMI /
页数 文件大小 规格书
4页 145K
描述
Terminator

LX5205CDWPT 数据手册

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LIN DOC #: 5205  
LX5205  
18-LINE PLUG AND PLAY, µPOWER SCSI TERMINATOR  
P R E L I M I N A R Y 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  
SCSI PLUG AND PLAY, DUAL LOW  
The LX5205 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 normal operation, the LX5205  
consumes only 800µA of current which is  
DISCONNECT, LOGIC LOW COMMAND  
DISCONNECTS ALL TERMINATION LINES  
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 LX5205 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 LX5205 sinks up to 100mA of  
current making it compatible with today's  
fast active negation drivers.  
2.5pF OUTPUT CAPACITANCE DURING  
DISCONNECT  
During disconnect mode, the LX5205  
requires a meager 500nA of supply current  
while offering only 2.5pF of output capaci-  
tance. To enter this low power mode, the  
disconnect pins can be left open (floating)  
or driven low thereby disconnecting the  
terminating resistors and placing the internal  
low dropout regulator into low power  
mode. Indisconnectmodeeachtermination  
line presents a high impedance to the SCSI  
bus with the overall effect being to preserve  
high signal integrity and subsequent reli-  
able, error free communications. The  
LX5205 has two disconnect pins for SCSI  
Plug and Play (PnP) applications.  
500nA SUPPLY CURRENT IN DISCONNECT  
MODE  
800µA SUPPLY CURRENT DURING NORMAL  
OPERATION  
100mA SINK CURRENT FOR ACTIVE  
NEGATION  
LOGIC COMMAND DISCONNECTS ALL  
TERMINATION LINES  
CURRENT LIMIT AND THERMAL PROTEC-  
TION  
COMPATIBLE WITH SCSI 1, 2, 3, AND  
FAST-20 STANDARDS  
The LX5205 is a superior, pin-for-pin  
replacement for the UC5607.  
HOT SWAP COMPATIBLE  
IMPORTANT: For the most current data, consult LinFinity's web site: http://www.linfinity.com.  
PRODUCT HIGHLIGHT  
RECEIVING WAVEFORM - 20MHZ  
DRIVING WAVEFORM - 20MHZ  
Receiver  
Driver  
1 Meter, AWG 28  
Disconnect 1  
Disconnect 2  
Disconnect 1  
Disconnect 2  
LX5205  
PnP  
LX5205  
PnP  
LX5268  
LX5268  
NOTE:  
For An In-Depth  
PACKAGE ORDER INFO  
Discussion On Applying  
SCSI, Request Linfinity  
Application Note:  
"Understanding The  
Single-Ended SCSI Bus"  
Plastic SOWB  
28-pin, Power  
TA (°C)  
DWP  
0 to 70  
LX5205CDWP  
Note: All surface-mount packages are available in Tape & Reel.  
Append the letter "T" to part number. (i.e. LX5205CDWPT)  
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 © 1998  
Rev. 0.7 3/98  
1

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