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參數(shù)資料
| 型號： | LX5250 |
| 廠商： | Microsemi Corporation |
| 英文描述： | 9-Line Multimode SCSI Terminator |
| 中文描述： | 9線多模的SCSI終結(jié)者 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大?。?/td> | 196K |
| 代理商： | LX5250 |
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright
2002
Rev. 1.2b, 2005-08-29
W
M
.
C
LX5250/5252
9-Line Multimode SCSI Terminator
P
RODUCTION DATA SHEET
TM
D E S C R I P T I O N
The LX5250/52 is a multimode SCSI
terminator that is compatible with the
SCSI SPI-2 (Ultra2 SCSI), SCSI SPI-3
(Ultra3 SCSI or Ultra160 SCSI), and
SCSI SPI-4 (Ultra320) specifications
developed
by
the
committee for low voltage differential
(LVD) termination, while providing
backwards compatibility to the SCSI,
SCSI-2,
and
SPI
specifications. Multimode compatibility
permits the use of legacy devices on the
bus
without
hardware
Automatic mode selection is achieved
through
voltage
detection
Diffsense line.
The LX5250/52 utilizes an industry
standard
LVD
individual
high
bandwidth
maximize channel separation, reduce
channel-to-channel noise and cross talk
to insure Ultra320 performance.
When the LX5250/52 is enabled, the
differential sense (DIFFSENSE) pin
supplies a voltage between 1.2V and
T10
standards
single-ended
alterations.
on
the
architecture.
The
drivers
1.4V. In application this pin is tied to the
DIFFSENSE input of the corresponding LVD
transceivers. This action enables the LVD
transceiver function. DIFFSENSE is capable of
supplying a maximum of 10mA.
Tying the DIFFSENSE pin high places the
LX5250/52 in a HI Z state indicating the
presence of an HVD device. Tying the pin low
places the part in a single-ended mode while
also signaling the multimode transceiver to
operate in a single-ended mode.
Recognizing the needs of portable and
configurable peripherals, the LX5250/52 has a
TTL compatible sleep/disable mode. During
this sleep/disable mode, power dissipation is
reduced to a meager 15uA while also placing
all outputs in a HI Z state. Also during
sleep/disable mode, the DIFFSENSE function
is disabled and is placed in a HI Z state.
The LX5250/52 also provides a master /
slave function. Driving this pin high or
floating the pin enables the 1.3V DIFFSENSE
reference. Driving the pin low disables the on
board DIFFSENSE reference and enables use
of an external master reference device.
IMPORTANT:
For the most current data, consult
MICROSEMI
’s website:
http://www.microsemi.com
K E Y F E A T U R E S
Compliant with SCSI SPI-2
(Ultra2), SPI-3 (Ultra160), and
SPI-4 (Ultra320)
Auto-Selectable LVD or Single-
Ended Termination
Fast Response, No Output
Capacitors Required
Compatible with Active Negation
Drivers
15μA Supply Current in
Disconnect Mode
Logic Command Disconnects All
Termination Lines
Diffsense Line Driver
Ground Driver Integrated for
Single-Ended Operation
Current Limit and Thermal
Protection
Hot-Swap Compatible (Single-
Ended)
Available in 36-pin QSOP and 28-
pin TSSOP package
LX5250, 36-pin QSOP: Pin
Compatible With DS2118,
UCC5630A and UCC5672
LX5250 28-pin TSSOP: Pin
Compatible with DS2119, and
UCC5672
P R O D U C T H I G H L I G H T
LX5250/
LX5252
LX5250/
LX5252
+
-
+
-
PACK AGE ORDER INFO
QSOP
36-Pin
RoHS Compliant / Pb-free
Transition DC: 0535
LX5250CDB
LX5252CDB
DB
PW
RoHS Compliant / Pb-free
Transition DC: 0518
LX5250CPW
TSSOP
28-Pin
T
A
(
°
C)
0 to 70
-
Note: Available in Tape & Reel.
Append the letters “TR” to the part number. (i.e. LX5250CDB-TR)
L
X
5
2
5
0
/
5
2
5
2
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