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UCC5630AFQPTR PDF预览

UCC5630AFQPTR

更新时间： 2024-11-22 21:53:47
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德州仪器 - TI /
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8页 146K
描述
Multimode SCSI 9 Line Terminator

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UCC5630AFQPTR 数据手册

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UCC5630A  
Multimode SCSI 9 Line Terminator  
FEATURES  
DESCRIPTION  
• Auto Selection Single Ended (SE) or  
Low Voltage Differential (LVD)  
Termination  
The UCC5630A Multimode SCSI Terminator provides a smooth transition  
into the LVD SCSI Parallel Interface (SPI-2, SPI-3, SPI-4). It automatically  
senses the bus, via DIFFB, and switches the termination to either single  
ended (SE) or low voltage differential (LVD) SCSI, dependent on which  
type of devices are connected to the bus. The UCC5630A can not be used  
on a HVD, EIA485, differential SCSI bus. If the UCC5630A detects a HVD  
SCSI device, it switches to a high impedance state.  
• Meets SCSI-1, SCSI-2, Ultra2 (SPI-2  
LVD), Ultra3, Ultra160 (SPI-3) and  
Ultra320 (SPI-4) Standards  
• 2.7V to 5.25V Operation  
• Differential Failsafe Bias  
The Multimode terminator contains all functions required to terminate and  
auto detect and switch modes for SPI-2, SPI-3 and SPI-4 bus architectures.  
Single Ended and Differential impedances and currents are trimmed for  
maximum effectiveness. Fail Safe biasing is provided to insure signal integ-  
rity. 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 pro-  
vides all the performance analog functions necessary to implement SPI-2  
termination in a single monolithic device.  
• Thermal packaging for low junction  
temperature and better MTBF  
• Master/Slave Input  
• Supports Active Negation  
• 3pF Channel Capacitance  
The UCC5630A is offered in a 36 pin SSOP package, as well as a 48 pin  
LQFP package for a temperature range of 0°C to 70°C.  
BLOCK DIAGRAM  
HIPD LVD  
35 34  
SE  
33  
(NOISE LOAD)  
REF 1.3V  
HIPD  
2.15V  
1.3V  
20 DIFSENS  
DIFFB 21  
LVD  
SE  
–15mA ≤ I  
≤ –5mA  
SOURCE  
0.6V  
50µA ≤ I  
≤ 200µA  
SINK  
19  
MSTR/SLV  
110  
124  
SOURCE/SINK REGULATOR  
SE REF 2.7V  
56mV  
52.5  
52.5  
–
+
5
4
L1–  
L1+  
LVD REF 1.25V  
56mV  
+
–
ALL  
SWITCHES  
MODE  
SE GND SWITCH  
56mV  
SE  
LVD  
UP  
110  
124  
10µA  
DOWN  
OPEN  
OPEN  
HIPD  
52.5  
52.5  
ENABLE  
SWITCHES  
–
+
DISCNCT  
17  
DISCNCT  
32 L9–  
31 L9+  
56mV  
+
–
TRMPWR 36  
SE GND SWITCH  
18  
8
9
10  
26  
27  
28  
1
PATENTED CIRCUIT DESIGN  
GND  
REG  
HS/GND  
UDG-98192  
Note: Indicated pinout is for 36 pin SSOP package.  
SLUS322C - SEPTEMBER 1999 - REVISED MARCH 2002  
12345678

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UCC5630AFQPTR 替代型号

型号 品牌 替代类型 描述 数据表
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