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UCC5618PWP PDF预览

UCC5618PWP

更新时间: 2024-11-19 12:05:55
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
9页 748K
描述
18-Line SCSI Terminator

UCC5618PWP 数据手册

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UCC5618  
18-Line SCSI Terminator  
FEATURES  
DESCRIPTION  
Complies with SCSI, SCSI-2, SCSI-3, The UCC5618 provides 18 lines of active termination for a SCSI (Small  
SPI and FAST-20 Standards  
Computers Systems Interface) parallel bus. The SCSI standard recom-  
mends and Fast-20 (Ultra) requires active termination at both ends of the  
cable.  
2pF Channel Capacitance During  
Disconnect  
Pin for pin compatible with the UC5601 and UC5608, the UCC5618 is ideal  
for high performance 5V SCSI systems, Termpwr 4.0-5.25V. During discon-  
nect the supply current is only 50µA typical, which makes the IC attractive  
for lower powered systems.  
50µA Supply Current in Disconnect  
Mode  
110Termination  
SCSI Hot Plugging Compliant, 10nA  
Typical  
The UCC5618 is designed with a low channel capacitance of 2pF, which  
eliminates effects on signal integrity from disconnected terminators at in-  
terim points on the bus.  
+400mA Sinking Current for Active  
Negation  
The power amplifier output stage allows the UCC5618 to source full termi-  
nation current and sink active negation current when all termination lines  
are actively negated.  
–650mA Sourcing Current for  
Termination  
The UCC5618, as with all Unitrode terminators, is completely hot pluggable  
and appears as high impedance at the terminating channels with  
TRMPWR=0V or open.  
Trimmed Impedance to 5%  
Thermal Shutdown  
Current Limit  
Internal circuit trimming is utilized, first to trim the 110impedance, and  
then most importantly, to trim the output current as close to the max  
SCSI-3 spec as possible, which maximizes noise margin in fast SCSI op-  
eration.  
This device is offered in low thermal resistance versions of the industry  
standard 28 pin wide body SOIC, TSSOP and PLCC.  
BLOCK DIAGRAM  
UDG-96005-1  
Patented Circuit Design  
6/98  

UCC5618PWP 替代型号

型号 品牌 替代类型 描述 数据表
UCC5618QP TI

完全替代

18-Line SCSI Terminator

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