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参数资料
| 型号： | DS2108S+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/5页 |
| 文件大小： | 0K |
| 描述： | IC TERM SCSI DIFF/SWITCH 24-SOIC |
| 标准包装： | 1,000 |
| 类型： | SCSI，HVD，SE |
| 端子数： | 9 |
| 电源电压： | 4 V ~ 5.25 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 24-SOIC W |
| 包装： | 带卷 (TR) |
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112099
FEATURES
Fully compliant with SCSI, SCSI-2 and SCSI-
3 standards
Conforms to EIA RS-485 standard
Provides differential termination for 9 pairs of
signal lines
Operates with SCSI signal voltages of -7 to
+12 Volts
Laser-trimmed 330 and 150-ohm termination
resistors have ±5% tolerance over full
temperature range
Switchable power-down mode
Low power down capacitance of 6 pF
24-pin plastic SOIC (DS2108S)
PIN ASSIGNMENT
DESCRIPTION
The DS2108 SCSI Terminator has been specifically designed for High Voltage Differential (HVD) SCSI
systems requiring switchable termination. The DS2108 integrates eighteen 330-ohm and nine 150-ohm
precise switched termination resistors into a monolithic IC. The surface mount SOIC package saves board
space over conventional resistor SIPs. The termination resistors can be isolated from the SCSI bus under
software or hardware control. While in the powered down mode, the DS2108 isolates the nine terminator
blocks from the bus while adding only 6 pF capacitance to each signal line of the SCSI bus.
FUNCTIONAL DESCRIPTION
The DS2108 consists of power-down circuitry, eighteen 330-ohm and nine 150-ohm termination resistors
(Figure 1). The DS2108 can be removed from the circuit by bringing the power down pin (PD) low. The
power down capacitance on the terminating resistors is 6 pF, well below the SCSI-3 allotment of 25 pF.
The DS2108 supports SCSI signal voltages of -7 to +12 volts when powered on or off. When all lines
settle into the quiescent state (no signal transitions), 56 mA is typically consumed.
Only 1 mA is
typically consumed in the powered down mode.
DS2108
Differential SCSI Switchable Terminator
www.dalsemi.com
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PD
GND
R1P
R3P
R4P
R5P
R6P
R7P
R8P
R9P
GND
R2P
TPWR
R1N
R2N
R4N
R5N
R6N
R7N
R8N
R9N
TPWR
NC
R3N
DS2108S 24-Pin SOIC (300-mil)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2109 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Plug and Play SCSI Terminator |
| DS2109DK | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Demo Board |
| DS2109S | 功能描述:IC TERM SCSI PLUG/PLAY 28-SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 信号终端器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 类型:SCSI，SE 端子数:9 电源电压:4 V ~ 5.25 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:管件 |
| DS2109S/T&R | 制造商:Maxim Integrated Products 功能描述:PNP SCSI TERMINATOR 28P SOIC-TRL - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC TERM SCSI PLUG/PLAY 28-SOIC |
| DS2109S/T&R | 功能描述:IC TERM SCSI PLUG/PLAY 28-SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 信号终端器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 类型:SCSI，SE 端子数:9 电源电压:4 V ~ 5.25 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:管件 |
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