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MCCS142235DWR2

更新时间： 2024-11-26 14:53:15
品牌 Logo 应用领域
安森美 - ONSEMI 光电二极管
页数 文件大小 规格书
12页 96K
描述
18-LINE 110ohm SCSI BUS TERMINATOR, PDSO24, SOIC-24

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中文翻译

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MCCS142235DWR2 技术参数

是否Rohs认证：不符合生命周期：Obsolete
零件包装代码：SOIC包装说明：SOIC-24
针数：24Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.15Is Samacsys：N
差分输出：NO接口集成电路类型：SCSI BUS TERMINATOR
JESD-30 代码：R-PDSO-G24JESD-609代码：e0
长度：15.4 mm功能数量：1
信号线数量：18端子数量：24
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：SOP
封装等效代码：SOP24,.4封装形状：RECTANGULAR
封装形式：SMALL OUTLINE峰值回流温度（摄氏度）：NOT SPECIFIED
电源：2.9 V标称上拉电阻：110 Ω
认证状态：Not Qualified座面最大高度：2.65 mm
子类别：Bus Terminators最大供电电压：2.95 V
最小供电电压：2.75 V标称供电电压：2.85 V
表面贴装：YES温度等级：COMMERCIAL
端子面层：Tin/Lead (Sn/Pb)端子形式：GULL WING
端子节距：1.27 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

MCCS142235DWR2 数据手册

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ON Semiconductort  
MCCS142235  
18-Bit Switchable Active  
SCSI Bus Terminator (110Ω)  
The MCCS142235 is a precision 18–bit switchable active SCSI  
bus terminator. It is used in conjunction with a 2.85V regulator  
18–BIT ACTIVE  
SCSI TERMINATOR  
(110Ω)  
(MC34268). Also provided is a Local–V (LV ) low voltage sense  
CC  
CC  
circuit to latch the enable state when a peripheral is shut down or loses  
power. When the device is enabled according to the truth table below,  
the MCCS142235 provides 110Ω precision resistor pull–ups to a  
2.85V reference for termination of 18–bits in a SCSI standard bus  
system interface. When the switch is disabled, the device is in a High  
Impedance State on all 18 bits.  
The low voltage sense circuit gives the device the ability to latch the  
current output state when power is removed from the LV pin. As  
CC  
long as TERMPWR remains, there is no interruption to the SCSI bus  
when powering down a SCSI peripheral, because the proper  
termination condition remains.  
DW SUFFIX  
24–LEAD WIDE SOIC PACKAGE  
CASE 751E–04  
In 8–bit SCSI applications (“A” cable), only one ‘2235 is needed at  
each end of the SCSI cable in order to terminate the 18 active signal  
lines. In 16–bit WIDE SCSI applications (“P” cable), one ‘2235 and  
one ‘2234 (or two ‘2235s) would be needed at each end of the SCSI  
cable in order to terminate the 27 active signal lines.  
For information on “Power Dissipation for Active SCSI  
Terminators,” refer to ON Semiconductor Application Note  
AN1408/D, available through the ON Semiconductor Fax System, or  
through the ON Semiconductor Literature Distribution Center.  
FA SUFFIX  
32–LEAD PLASTIC FQFP PACKAGE  
CASE 873A–02  
• Complies With SCSI and SCSI–2 Standards  
• 18 Switchable 110Ω Terminating Resistors  
• Operating Temperature Range: 0°C to 70°C  
• Operating Voltage Range: 2.75 to 2.95V  
• Resistor Tolerance ±5.0% (Over Temperature and Supply Voltage  
Ranges)  
• Local–V (LV ) Low Voltage Sense Circuit  
CC  
CC  
TRUTH TABLE  
Test  
Enable  
Output  
Active  
Mode  
0
0
0
1
Z
Terminated  
Test  
Mode  
1
X
Test Mode  
VREG LV  
O18 O17 O16 O15 O14 O13 O12 O11 O10 Test  
CC  
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
MCCS142235  
1
2
3
4
5
6
7
8
9
10  
11  
12  
V
ref  
Enable O1 O2  
O3  
O4  
O5  
O6  
O7  
O8  
O9 GND  
Figure 1. 24–Lead Pinout (Top View)  
Semiconductor Components Industries, LLC, 2001  
1
Publication Order Number:  
August, 2001 – Rev. 3  
MCCS142235/D  
1234567...12

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