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UC5603NTR PDF预览

UC5603NTR

更新时间： 2024-11-23 13:15:07
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
5页 257K
描述
IC SCSI BUS TERMINATOR, Bus Terminator

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中文翻译

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UC5603NTR 技术参数

生命周期：Obsolete包装说明：,
Reach Compliance Code：compliant风险等级：5.78
Is Samacsys：N接口集成电路类型：SCSI BUS TERMINATOR
Base Number Matches：1

UC5603NTR 数据手册

 浏览型号UC5603NTR的Datasheet PDF文件第2页浏览型号UC5603NTR的Datasheet PDF文件第3页浏览型号UC5603NTR的Datasheet PDF文件第4页浏览型号UC5603NTR的Datasheet PDF文件第5页 
UC5603  
9-Line SCSI Active Terminator  
FEATURES  
DESCRIPTION  
•
•
•
Complies with SCSI, SCSI-2 and  
SPI-2 Standards  
The UC5603 provides 9 lines of active termination for a SCSI (Small Comput-  
ers Systems Interface) parallel bus. The SCSI standard recommends active  
termination at both ends of the cable segment.  
6pF Channel Capacitance during  
Disconnect  
The UC5603 provides a disconnect feature which, when opened or driven  
high, will disconnect all terminating resistors, and disables the regulator;  
greatly reducing standby power. The output channels remain high impedance  
even without Termpwr applied. A low channel capacitance of 6pF allows units  
at interim points of the bus to have little to no effect on the signal integrity.  
100µA Supply Current in  
Disconnect Mode  
•
•
Meets SCSI Hot Plugging  
Functionally the UC5603 is similar to its predecessor, the UC5601 - 18 line  
Active Terminator. Several electrical enhancements were incorporated in the  
UC5603, such as a sink/source regulator output stage to accommodate all  
signal lines at +5V, while the regulator remains at its nominal value, reduced  
channel capacitance to 6pF typical, and as with the UC5601, custom power  
packages are utilized to allow normal operation at full power conditions (1.2  
watts).  
-400mA Sourcing Current for  
Termination  
•
•
•
+400mA Sinking Current for  
Active Negation Drivers  
Logic Command Disconnects all  
Termination Lines  
Trimmed Termination Current to  
3%  
Internal circuit trimming is utilized, first to trim the impedance to a 3% toler-  
ance, and then most importantly, to trim the output current to a 3% tolerance,  
as close to the max SCSI spec as possible, which maximizes noise margin in  
fast SCSI operation.  
•
•
Trimmed Impedance to 3%  
Negative Clamping on all Signal  
Lines  
Other features include negative clamping on all signal lines to protect exter-  
nal circuitry from latch-up, thermal shutdown and current limit.  
•
Current Limit and Thermal  
Shutdown Protection  
This device is offered in low thermal resistance versions of the industry stand-  
ard 16 pin narrow body SOIC, 16 pin ZIP (zig-zag in line package) and 24 pin  
TSSOP.  
BLOCK DIAGRAM  
UDG-94049  
Circuit Design Patented  
3/97  
12345

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