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DS2118MB PDF预览

DS2118MB

更新时间: 2024-11-20 23:48:51
品牌 Logo 应用领域
达拉斯 - DALLAS /
页数 文件大小 规格书
8页 144K
描述
Terminator

DS2118MB 技术参数

是否Rohs认证: 不符合生命周期:Transferred
包装说明:SSOP-36Reach Compliance Code:unknown
风险等级:5.61差分输出:YES
接口集成电路类型:SCSI BUS TERMINATORJESD-30 代码:R-PDSO-G36
JESD-609代码:e0功能数量:1
信号线数量:9端子数量:36
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:SOP36,.4,32封装形状:RECTANGULAR
封装形式:SMALL OUTLINE电源:5 V
标称上拉电阻:110 Ω认证状态:Not Qualified
子类别:Bus Terminators最大供电电压:5.5 V
标称供电电压:5 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:0.8 mm端子位置:DUAL
Base Number Matches:1

DS2118MB 数据手册

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DS2118M  
Ultra2 LVD/SE SCSI Terminator  
www.dalsemi.com  
FEATURES  
PIN ASSIGNMENT  
Fully compliant with Ultra2 SCSI  
Provides Multimode Low Voltage  
Differential/Single-Ended (LVD/SE)  
termination for 9 signal line pairs  
Auto-selection of LVD or SE termination  
5% tolerance on SE and LVD termination  
resistance  
Low power down capacitance of 3 pF  
Onboard thermal shutdown circuitry  
SCSI bus hot plug compatible  
Fully supports actively negated SE SCSI  
signals  
VREF  
NC  
NC  
R1P  
R1N  
R2P  
R2N  
1
2
3
4
5
6
7
8
9
10  
36  
35  
34  
33  
32  
31  
30  
29  
28  
27  
26  
TPWR  
HVD  
LVD  
SE  
R9N  
R9P  
R8N  
R8P  
HS GND  
HS GND  
HS GND  
HS GND  
HS GND  
HS GND  
R3P 11  
25 R7N  
12  
13  
14  
15  
16  
17  
18  
R3N  
R4P  
R4N  
R5P  
R5N  
ISO  
24  
23  
22  
21  
20  
19  
R7P  
R6N  
R6P  
DIFF_CAP  
DIFFSENSE  
MSTR/SLV  
GND  
DS2118MB 36-Pin SSOP  
DESCRIPTION  
The DS2118M Ultra2 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 DS2118M will use LVD termination. If any SE devices are connected  
to the bus, the DS2118M 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 DS2118M integrates two regulated supplies with nine precision resistor  
strings. For the SE termination, one regulator and nine precision 110-ohm resistors are used. Three  
DS2118M terminators are needed for a Wide SCSI bus.  
1 of 8  
090199  

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