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UCC5621MWPTRG4 PDF预览

UCC5621MWPTRG4

更新时间: 2024-09-20 21:15:15
品牌 Logo 应用领域
德州仪器 - TI 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
IC 27-LINE 110 ohm SCSI BUS TERMINATOR, PDSO44, SSOP-44, Bus Terminator

UCC5621MWPTRG4 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, SOP44,.4,32针数:44
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.82
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
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 mm
Base Number Matches:1

UCC5621MWPTRG4 数据手册

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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  

UCC5621MWPTRG4 替代型号

型号 品牌 替代类型 描述 数据表
UCC5621MWP TI

功能相似

27-LINE 110ohm SCSI BUS TERMINATOR, PDSO44
UCC5621MWPTR TI

功能相似

27-LINE 110ohm SCSI BUS TERMINATOR, PDSO44, SSOP-44

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