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參數(shù)資料
| 型號(hào)： | UCC5642 |
| 廠商： | Benchmark Technology Group |
| 英文描述： | LVD-only Small Computer System Interface (SCSI) Terminator(用于低壓差分小型計(jì)算機(jī)系統(tǒng)接口的終端匹配器) |
| 中文描述： | 內(nèi)徑僅小型計(jì)算機(jī)系統(tǒng)接口（SCSI）終結(jié)者（用于低壓差分小型計(jì)算機(jī)系統(tǒng)接口的終端匹配器） |
| 文件頁(yè)數(shù)： | 1/8頁(yè) |
| 文件大小： | 136K |
| 代理商： | UCC5642 |
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SLUS477 – FEBRUARY 2000 – REVISED DECEMBER 2000
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
LVD-Only Active Termination
2.7-V to 5.25-V Operation
Differential Failsafe Bias
Integrated SPI-3 Mode Change/Filter Delay
Thermal Packaging for Low Junction
Temperature and Better MTBF
2.85-V Regulator With Load Share
Meets Ultra2 (SPI-2 LVD), Ultra3/Ultra160
(SPI-3) and Ultra320 (SPI-4) Standards
description
The UCC5642 is an LVD-only small computer system interface (SCSI) terminator that integrates the mode
change delay function required by the SPI-3 specification. The device senses what types of SCSI drivers are
present on the bus via the voltage on the DIFFSENS SCSI control line. Single-ended (SE) and high-voltage
differential (HVD) (EIA485) SCSI drivers are not supported. If the chip detects the presence of an SE or HVD
SCSI driver, it disconnects itself by switching all terminating resistors off the bus and enters a high-impedance
state. The terminator can also be commanded to disconnect the terminating resistors with the DISCNCT input.
Impedance is trimmed for accuracy and maximum effectiveness. Bus lines are biased to a failsafe state to
ensure signal integrity. A 2.85-V, 300-mA sourcing regulator on chip can share with two other UCC5642 devices
in a parallel configuration for a 900 mA total.
The UCC5642 is offered in a 36-pin QSOP (MWP) package for a temperature range of 0
°
C to 70
°
C.
block diagram
UDG-00158
11
6
DIFSENS
DIFFSENS
REF 1.3 V
ENABLE
21
L1–
52
22
L1+
52
L9–
L9+
56 mV
+ –
56 mV
+
124
34
52
33
52
56 mV
+ –
56 mV
– +
124
REG
5
DIFFB
0.6 V
2.1 V
FILTER/
DELAY
12
TRMPWR
LVD REF
1.25 V
SOURCE/SINK
REGULATOR
ENABLE
10
μ
A
28
26
HS/GND
HS/GND
32
GND
7
DISCNCT
SE
LVD
DISCNCT
HPD
DOWN
DOWN
OPEN
DOWN
DOWN
OPEN
OPEN
OPEN
MODE
SW1
OTHER
SWITCHES
HPD
LVD
SE
10
8
HS/GND
HS/GND
31
30
25
24
29
3.6 k
1.5 V
VOLTAGE
AMPLIFIER
CURRENT
AMPLIFIER
VCC TO 2.85 V REGULATOR
TTL DRIVERS
LVD
SHARE
VREG
VOUTM
VCC
4 k
SW1
Copyright
2000, Texas Instruments Incorporated
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+*+#&! ' $$ ()%+)*
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UCC5642MWP | 功能描述:SCSI 接口集成電路 9line 3-5V SCSI Mult RoHS:否 制造商:Texas Instruments 工作電源電壓:2.7 V to 5.25 V 電源電流:13 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSOP-36 封裝:Tube |
| UCC5642MWPG4 | 功能描述:SCSI 接口集成電路 9line 3-5V SCSI Mult RoHS:否 制造商:Texas Instruments 工作電源電壓:2.7 V to 5.25 V 電源電流:13 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSOP-36 封裝:Tube |
| UCC5642MWPR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:TERMINATOR|SOP|36PIN|PLASTIC |
| UCC5642MWPTR | 功能描述:SCSI 接口集成電路 9Line LVD Term RoHS:否 制造商:Texas Instruments 工作電源電壓:2.7 V to 5.25 V 電源電流:13 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSOP-36 封裝:Tube |
| UCC5642MWPTRG4 | 功能描述:SCSI 接口集成電路 9Line LVD Term RoHS:否 制造商:Texas Instruments 工作電源電壓:2.7 V to 5.25 V 電源電流:13 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSOP-36 封裝:Tube |
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