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DS2119ME PDF预览

DS2119ME

更新时间: 2024-11-21 20:27:11
品牌 Logo 应用领域
达拉斯 - DALLAS 光电二极管接口集成电路
页数 文件大小 规格书
9页 93K
描述
SCSI Terminator, 9-Line, 52ohm, CMOS, PDSO28, TSSOP-28

DS2119ME 技术参数

是否Rohs认证: 不符合生命周期:Transferred
包装说明:TSSOP-28Reach Compliance Code:unknown
风险等级:5.63差分输出:YES
接口集成电路类型:SCSI BUS TERMINATORJESD-30 代码:R-PDSO-G28
JESD-609代码:e0功能数量:1
信号线数量:9端子数量:28
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:TSSOP
封装等效代码:TSSOP28,.25封装形状:RECTANGULAR
封装形式:SMALL OUTLINE电源:3/5 V
标称上拉电阻:52 Ω认证状态:Not Qualified
子类别:Bus Terminators最大供电电压:5.5 V
最小供电电压:2.7 V表面贴装:YES
技术:CMOS温度等级:COMMERCIAL
端子面层:Tin/Lead (Sn/Pb)端子形式:GULL WING
端子节距:0.635 mm端子位置:DUAL
Base Number Matches:1

DS2119ME 数据手册

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DS2119M  
Ultra3 LVD/SE SCSI Terminator  
www.maxim-ic.com  
PIN ASSIGNMENT  
FEATURES  
ꢀꢁFully compliant with SCSI SPI-2, SPI-3,  
SPI-4, Ultra160, and Ultra320  
1
2
28  
27  
26  
25  
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
TPWR  
TPWR  
R9N  
R9P  
R8N  
R8P  
HS GND  
R7N  
R7P  
R6N  
VREF  
RIP  
ꢀꢁProvides multimode low-voltage  
differential/single-ended (LVD/SE)  
termination for nine signal-line pairs  
ꢀꢁAuto-selection of LVD or SE termination  
ꢀꢁ5% tolerance on SE and LVD termination  
resistance  
ꢀꢁLow power-down capacitance of 3pF  
ꢀꢁOnboard thermal-shutdown circuitry  
ꢀꢁSCSI-bus hot-plug compatible  
ꢀꢁFully supports actively negated SE SCSI  
signals  
RIN  
R2P  
3
4
R2N  
5
HS GND  
6
R3P  
7
R3N  
8
R4P  
9
R4N  
R5P  
R5N  
ISO  
10  
11  
12  
13  
14  
R6P  
DIFF_CAP  
DIFFSENSE  
MSTR/SLV  
GND  
DS2119ME 28-Pin TSSOP  
DESCRIPTION  
The DS2119M Ultra3 LVD/SE SCSI Terminator is both a low-voltage differential (LVD) and single-  
ended (SE) terminator. The multimode operation enables the designer to implement LVD in current  
products while allowing the end-user SE-backward compatibility with legacy devices. If the device is  
connected in an LVD-only bus, the DS2119M will use LVD termination. If any SE devices are connected  
to the bus, the DS2119M will use SE termination. This is accomplished automatically inside the part by  
sensing the voltage on the SCSI bus DIFFSENS line.  
For the LVD termination, the DS2119M integrates two current sources with nine precision resistor  
strings. For the SE termination, one regulator and nine precision 110; resistors are used. Three  
DS2119M terminators are needed for a wide SCSI bus.  
REFERENCE DOCUMENTS  
Small Computer Systems Interface (SCSI-3) SCSI Parallel Interface (SPI)  
Project: 0855-M, 1995  
Small Computer Systems Interface (SCSI-3) SCSI Parallel Interface 2 (SPI-2) Project: 1142-M, 1998  
Small Computer Systems Interface (SCSI-3) SCSI Parallel Interface 3 (SPI-3) Project: 1302-D, 1999  
Small Computer Systems Interface (SCSI-3) SCSI Parallel Interface 4 (SPI-4) Project: 1365-D, 200x  
Available From:  
American National Standards Institute (ANSI) Phone: (212) 642-4900  
Global Engineering Documents 15 Inverness Way East; Englewood, CO 80112 Phone: (800) 854-7179  
1 of 9  
022002  

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