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參數(shù)資料
| 型號(hào)： | UCC5639 |
| 廠商： | Benchmark Technology Group |
| 英文描述： | Multimode SCSI 15 Line Terminator with Reverse Disconnect(多模式小型計(jì)算機(jī)接口終端匹配器（帶反向斷開）) |
| 中文描述： | 多模的SCSI 15線終結(jié)者與反向斷開（多模式小型計(jì)算機(jī)接口終端匹配器（帶反向斷開）） |
| 文件頁數(shù)： | 1/6頁 |
| 文件大?。?/td> | 62K |
| 代理商： | UCC5639 |
UCC5639
DESCRIPTION
The UCC5639 Multimode SCSI Terminator provides a smooth transition
into the next generation of the SCSI Parallel Interface (SPI-2). It automati-
cally senses the bus, via DIFFB, and switches the termination to either sin-
gle ended (SE) or low voltage differential (LVD) SCSI, dependent on which
type of devices are connected to the bus. The UCC5639 can not be used
on a HVD, EIA485, differential SCSI bus. If the UCC5639 detects a HVD
SCSI device, it switches to a high impedance state.
The Multimode terminator contains all functions required to terminate and
auto detect and switch modes for SPI-2 bus architectures. Single Ended
and Differential impedances and currents are trimmed for maximum effec-
tiveness. Fail Safe biasing is provided to insure signal integrity. Device/Bus
type detection circuitry is integrated into the terminator to provide automatic
switching of termination between single ended and LVD SCSI and a high
impedance for HVD SCSI. The multimode function provides all the perform-
ance analog functions necessary to implement SPI-2 termination in a sin-
gle monolithic device.
The UCC5639 is offered in a 48 pin LQFP package for a temperature range
of 0°C to 70°C.
Multimode SCSI 15 Line Terminator with Reverse Disconnect
FEATURES
Auto Selection Single Ended (SE) or
Low Voltage Differential (LVD)
Termination
Meets SCSI-1, SCSI-2, SCSI-3, SPI,
Ultra (Fast-20), Ultra2 (SPI-2 LVD)
and Ultra3 Standards
2.7V to 5.25V Operation
Differential Failsafe Bias
Thermal packaging for low junction
temperature and better MTBF.
03/99
REF
1.25V
36
DISCNCT
REG
L1+
L15–
L15+
SOURCE/SINK REGULATOR
REF
1.3V
4.7
μ
F
.
35
DIFFSENS
–15mA
≤
I
SOURCE
≤
–5mA
50
μ
A
≤
I
SINK
≤
200
μ
A
HIGH POWER
DIFFERENTIAL
LOW VOLTAGE
DIFFERENTIAL
SINGLE ENDED
34
DIFFB
0.6V
2.05V
52.5
2
52.5
1
110
10
REF
2.7V
SE GND SWITCH
3
TRMPWR
27
GND
4-9
HS/GND
28-33
HS/GND
L1–
124
52.5
12
52.5
11
110
124
1.3V
(NOISE LOAD)
MODE
SE
LVD
DISCNCT
ALL SWITCHES
UP
DOWN
OPEN
SE GND SWITCH
56mV
– +
+ –
– +
56mV
56mV
56mV
+ –
BLOCK DIAGRAM
UDG-98110
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UCC5639FQP | 功能描述:SCSI 接口集成電路 15Ln 3-5V SCSI Multi 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 |
| UCC5639FQPG4 | 功能描述:SCSI 接口集成電路 15Ln 3-5V SCSI Multi 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 |
| UCC5639FQPTR | 功能描述:SCSI 接口集成電路 15 Line 2.7-5V Multi mode 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 |
| UCC5639FQPTRG4 | 功能描述:SCSI 接口集成電路 15 Line 2.7-5V Multi mode 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 |
| UCC5640 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Low Voltage Differential LVD SCSI 9 Line Terminator |
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