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參數(shù)資料
| 型號： | LX5243CPW |
| 廠商： | MICROSEMI CORP |
| 元件分類： | Bus Terminator |
| 英文描述： | 9-LINE 105 ohm SCSI BUS TERMINATOR, PDSO28 |
| 封裝： | ROHS COMPLIANT, PLASTIC, TSSOP-28 |
| 文件頁數(shù)： | 5/7頁 |
| 文件大小： | 215K |
| 代理商： | LX5243CPW |
M U L TIMODE SCSI T ERMIN A TOR
LX5241/5242/5243
PRODUCT D A T ABOOK 1996/1997
5
Copyright 2001
Rev. 1.5a 02/13
P RODUCTION D AT A S HEET
UltraMAX
1-, 2-, 3-, 4-, 5-, 6-, 7-, 8-, 9-6Negative signal termination lines for LVD mode. Signal termination lines for SE mode.
1+, 2+, 3+, 4+, 5+, 6+, 7+, 8+, 9+ Positive signal termination lines for LVD mode. Pseudo-ground lines for SE mode.
V
TERM
Power supply pin for terminator. Connect to SCSI bus TERMPWR. Must be decoupled by one 4.7F
low-ESR capacitor for every three terminator devices. It is absolutely necessary to connect this pin to
the decoupling capacitor through a very low impedance (big traces on PCB). Keeping distances very
short from the decoupling capacitors to the V
TERM pin is also critical. The value of the decoupling
capacitor is somewhat layout dependant and some applications may benefit from high-frequency
decoupling with 0.1F capacitors right at V
TERM pin.
DISCONNECT6Enables / disables terminator. See Power Down Function Table for logic levels per device.
GND6Terminator ground pin. Connect to ground.
MASTER / SLAVE6Sometimes referred to as M/S pin in this data sheet. Used to select which terminator is the control-
ling device. MASTER/SLAVE pin High or Open enables the DIFFSENSE output drive. Please see
MASTER/SLAVE Function Table.
DIFFSENSE6This is a dual function pin. It drives the SCSI bus DIFFSENS line. It is also the sense pin to detect the
SCSI bus mode (LVD, SE or HVD). DIFFSENSE output drive can be disabled with Low level on the
MASTER/SLAVE pin. Please see DIFFSENSE and MASTER/SLAVE Function Tables. Internally
connected to DIFFB pin through 20kOhm resistor.
DIFFB6Internally connected to DIFFSENSE pin through 20kOhm resistor. It can be used as a mode sense
pin when the device is a non-controlling terminator (MASTER/SLAVE pin is Low). An RC filter
(20kOhm / 0.1F) is not required on the LX5241/42/43, as it has an internal timer.
SE6Single-ended output; when High, terminator is operating in SE mode.
LVD6Low Voltage Differential output. When High, terminator is operating in LVD mode.
HVD6High Voltage Differential output. When High, terminator is operating in HVD mode.
HEATSINK6Attached to die mounting pad, but not bonded to GND pin. Pins should be considered a heat sink
only, and not a true ground connection. It is recommeneded that these pins be connected to ground,
but can be left floating.
Pin
Designator
Description
FUNCTIONAL PIN DESCRIPTION
O
B
SO
LETE
PRO
D
UCT
NOT
RECOMMENDED
FOR
NEW
DESIGNS
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LX5243CPWT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Terminator |
| LX5245 | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:9 - LINE LVD SCSI TERMINATO |
| LX5245CPW | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:9 - LINE LVD SCSI TERMINATO |
| LX5245-CPWT | 制造商:Microsemi Corporation 功能描述:SCSI TERMINATION 3V TO 5.25V 24TSSOP - Tape and Reel |
| LX5246 | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:9 - LINE LVD SCSI TERMINATO |
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