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UC5602NTR PDF预览

UC5602NTR

更新时间: 2024-11-19 03:24:35
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
6页 364K
描述
SCSI Active Terminator

UC5602NTR 数据手册

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UC5602  
SCSI Active Terminator  
FEATURES  
DESCRIPTION  
The UC5602 is a pin compatible version of its predecessor, the UC5601,  
and is targeted for high volume applications which require active termina-  
tion, but not the high performance of the UC5601. The major differences  
are relaxed output current and termination tolerances, and the absence of  
low side clamps.  
Complies with SCSI, SCSI-2  
Standards  
10pF Channel Capacitance During  
Disconnect  
Active Termination for 18 Lines  
The UC5602 provides 18 lines of active termination for a SCSI (Small  
Computer Systems Interface) parallel bus. The SCSI-2 standard recom-  
mends active termination at both ends of the cable segment, and SCSI-3  
will make it a requirement.  
Logic Command Disconnects all  
Termination Lines  
Low Supply Current in Disconnect  
Mode  
The UC5602 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 imped-  
ance even without Termpwr applied.  
Trimmed Regulator for Accurate  
Termination Current  
Current Limit and Thermal  
Shutdown Protection  
Internal circuit trimming is utilized, first to trim the impedance to a 7% toler-  
ance; and then most importantly, to trim the output current 7% tolerance,  
as close to the max SCSI as possible, which maximizes noise margin in  
fast SCSI operation.  
110 Ohm Termination  
Meets SCSI Hot Plugging  
Other features include thermal shutdown, current limit, and 40mA of active  
negation sink current capability.  
This device is offered in low thermal resistance versions of the industry  
standard 28 pin wide body SOIC and PLCC, as well as a 24 pin DIL plastic  
package.  
BLOCK DIAGRAM  
UDG-94052  
Circuit Design Patented  
10/94  

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