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UCC5621MWPTR PDF预览

UCC5621MWPTR

更新时间： 2024-11-08 21:15:15
品牌 Logo 应用领域
德州仪器 - TI 信息通信管理光电二极管接口集成电路
页数 文件大小 规格书
4页 153K
描述
27-LINE 110ohm SCSI BUS TERMINATOR, PDSO44, SSOP-44

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中文翻译

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UCC5621MWPTR 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Obsolete零件包装代码：SSOP
包装说明：SSOP-44针数：44
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：1 week
风险等级：5.81Is Samacsys：N
差分输出：NO接口集成电路类型：SCSI BUS TERMINATOR
JESD-30 代码：R-PDSO-G44长度：17.905 mm
功能数量：1信号线数量：27
端子数量：44最高工作温度：70 °C
最低工作温度：封装主体材料：PLASTIC/EPOXY
封装代码：SSOP封装等效代码：SOP44,.4,32
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, SHRINK PITCH
峰值回流温度（摄氏度）：NOT SPECIFIED电源：5 V
标称上拉电阻：110 Ω认证状态：Not Qualified
座面最大高度：2.64 mm子类别：Bus Terminators
最大供电电压：7 V最小供电电压：4 V
标称供电电压：4.75 V表面贴装：YES
技术：BICMOS温度等级：COMMERCIAL
端子形式：GULL WING端子节距：0.8 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：7.5 mmBase Number Matches：1

UCC5621MWPTR 数据手册

 浏览型号UCC5621MWPTR的Datasheet PDF文件第2页浏览型号UCC5621MWPTR的Datasheet PDF文件第3页浏览型号UCC5621MWPTR的Datasheet PDF文件第4页 
UCC5621  
27 - Line SCSI Terminator With Split Reverse Disconnect  
FEATURES  
DESCRIPTION  
• Complies with SCSI, SCSI-2, SCSI-3, UCC5621 provides 27 lines of active termination for a SCSI (Small Com-  
SPI and FAST-20 (Ultra) Standards  
puter Systems Interface) parallel bus. The SCSI standard recommends ac-  
tive termination at both ends of the cable.  
• 2.5pF Channel Capacitance During  
Disconnect  
The UCC5621 is ideal for high performance 5V SCSI systems. During dis-  
connect the supply current is typically only 100 A, which makes the IC at-  
tractive for lower powered systems.  
• 100 A Supply Current in Disconnect  
Mode  
The UCC5621 features a split reverse disconnect allowing the user to con-  
trol termination lines 10 to 27 with disconnect one, DISCNCT1, and control  
terminiation lines 1 to 9 with disconnect two, DISCNCT2.  
• 4V To 7V Operation  
• 110 Termination  
The UCC5621 is designed with a low channel capacitance of 2.5pF, which  
eliminates effects on signal integrity from disconnected terminators at in-  
terim points on the bus.  
• Completely Meets SCSI Hot Plugging  
• –900mA Sourcing Current for  
Termination  
The power amplifier output stage allows the UCC5621 to source full termi-  
nation current and sink active negation current when all termination lines  
are actively negated.  
• +500mA Sinking Current for Active  
Negation  
• Logic Command Disconnects all  
The UCC5621, as with all Unitrode terminators, is completely hot plugga-  
ble and appears as high impedance at the teminating channels with  
VTRMPWR = 0V or open.  
Termination Lines  
• Split Reverse Controls Lines 1 to 9  
and 10 to 27 Separately  
Internal circuit trimming is utilized, first to trim the 110 impedance, and  
then most importantly, to trim the output current as close to the maximum  
SCSI-3 specification as possible, which maximizes noise margin in FAST-  
20 SCSI operation.  
• Trimmed Impedance to 5%  
• Current Limit and Thermal Shutdown  
Protection  
(continued)  
BLOCK DIAGRAM  
UDG-96111  
Circuit Design Patented  
SLUS310A - OCTOBER 1998 - REVISED APRIL 2002  
1234

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