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參數(shù)資料
| 型號： | DS2119ME |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Bus Terminator |
| 英文描述： | 9-LINE 52 ohm SCSI BUS TERMINATOR, PDSO28 |
| 封裝： | TSSOP-28 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大?。?/td> | 238K |
| 代理商： | DS2119ME |
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090199
FEATURES
§ Fully compliant with Ultra2, Ultra3, and
Ultra 160/m 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
PIN ASSIGNMENT
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-ohm 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, xxxx
Available from:
A
merican National Standards Institute (ANSI) Phone: (212) 642-4900
Global Engineering Documents 15 Inverness Way East; Englewood, CO 80112 Phone: (800) 854-7179
DS2119M
Ultra3 LVD/SE SCSI Terminator
www.dalsemi.com
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24
27
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R9N
R9P
R8N
HS GND
R7N
R7P
R6N
R6P
DIFF_CAP
DIFFSENSE
MSTR/SLV
R8P
RIN
R2P
R2N
R3P
R4P
R4N
R5P
R5N
ISO
GND
HS GND
DS2119ME 28-Pin TSSOP
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28
15
VREF
RIP
TPWR
R3N
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| DS2155L | DATACOM, FRAMER, PQFP100 |
| DS2186 | DATACOM, DIGITAL SLIC, PDSO20 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS2119ME/T&R | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:IC TERM SCSI LVD/SE ULT3 28TSSOP |
| DS2119ME/T&R | 功能描述:SCSI 接口集成電路 Ultra3 LVD/SE SCSI Terminator RoHS:否 制造商:Texas Instruments 工作電源電壓:2.7 V to 5.25 V 電源電流:13 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSOP-36 封裝:Tube |
| DS2119ME+ | 功能描述:SCSI 接口集成電路 Ultra3 LVD/SE SCSI Terminator RoHS:否 制造商:Texas Instruments 工作電源電壓:2.7 V to 5.25 V 電源電流:13 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSOP-36 封裝:Tube |
| DS2119ME+T&R | 制造商:Maxim Integrated Products 功能描述:ULTRA3 LVD/SE SCSI TERMINATOR EOL271208 制造商:Maxim Integrated Products 功能描述:IC TERM SCSI LVD/SE ULT3 28TSSOP |
| DS2119ME+T&R/C02 | 制造商:Maxim Integrated Products 功能描述: |
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