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參數資料
型號: LX5205CDWPT
廠商: MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP
元件分類: 通用總線功能
英文描述: Terminator
中文描述: 18-LINE 110 ohm SCSI BUS TERMINATOR, PDSO28
封裝: POWER, PLASTIC, SO-28
文件頁數: 1/4頁
文件大小: 142K
代理商: LX5205CDWPT
D E S C R I P T I O N
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 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. In disconnect mode each termination
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.
P R O D U C T H I G H L I G H T
PACKAGE ORDER INFO
DWP
T
A
(°C)
0 to 70
LX5205CDWP
Plastic SOWB
28-pin, Power
During normal operation, the LX5205
consumes only 800μA 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 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.
The LX5205 is a superior, pin-for-pin
replacement for the UC5607.
K E Y F E AT U R E S
I
SCSI PLUG AND PLAY, DUAL LOW
DISCONNECT, LOGIC LOW COMMAND
DISCONNECTS ALL TERMINATION LINES
I
2.5pF OUTPUT CAPACITANCE DURING
DISCONNECT
I
500nA SUPPLY CURRENT IN DISCONNECT
MODE
I
800μA SUPPLY CURRENT DURING NORMAL
OPERATION
I
100mA SINK CURRENT FOR ACTIVE
NEGATION
I
LOGIC COMMAND DISCONNECTS ALL
TERMINATION LINES
I
CURRENT LIMIT AND THERMAL PROTEC-
TION
I
COMPATIBLE WITH SCSI 1, 2, 3, AND
FAST-20 STANDARDS
I
HOT SWAP COMPATIBLE
18-L
INE
P
LUG
AND
P
LAY
, μP
OWER
SCSI T
ERMINATOR
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
LX5205
LIN D
OC
#: 5205
R
ECEIVING
W
AVEFORM
- 20MH
Z
D
RIVING
W
AVEFORM
- 20MH
Z
Receiver
LX5205
PnP
LX5268
LX5268
1 Meter, AWG 28
Driver
LX5205
PnP
Disconnect 1
Disconnect 2
Disconnect 1
Disconnect 2
Note: All surface-mount packages are available in Tape & Reel.
Append the letter "T" to part number. (i.e. LX5205CDWPT)
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.
Copyright 1998
Rev. 0.7 3/98
1
11861 W
ESTERN
A
VENUE
, G
ARDEN
G
ROVE
, CA. 92841, 714-898-8121, F
AX
: 714-893-2570
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
.
相關PDF資料
PDF描述
LX5205 18-LINE PLUG AND PLAY, レPOWER SCSI TERMINATOR
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