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參數(shù)資料
| 型號： | DS2109S |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Bus Terminator |
| 英文描述： | 18-LINE 110 ohm SCSI BUS TERMINATOR, PDSO28 |
| 封裝： | 0.300 INCH, SOIC-28 |
| 文件頁數(shù)： | 1/10頁 |
| 文件大?。?/td> | 85K |
| 代理商： | DS2109S |
DS2109
Plug and Play SCSI Terminator
DS2109
022698 1/10
FEATURES
Fully compliant with SCSI–1, Fast SCSI and Ultra
SCSI
Compatible with Plug and Play SCSI Profile
Functionally compatible with DS21S07A
Provides active termination for 18 signal lines
2% tolerance on termination resistors and voltage
regulator
Bus termination sensing
Low power down capacitance of 3 pF
Onboard thermal shutdown circuitry
PIN ASSIGNMENT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
GND
R18
R17
R16
R15
R14
TCS
HS–GND
PDE
R13
R12
R11
R10
VREF
PDI
R1
R2
R3
R4
R5
HS–GND
PDO
R6
R7
R8
R9
TPWR
DS2109, DS2109S 28–PIN SOIC (300 MIL)
DESCRIPTION
The DS2109 is intended for one chip Plug and Play
(PnP) SCSI termination. Plug and Play SCSI requires
the exit–point terminator on computer motherboards or
host bus adapters to automatically switch off if an exter-
nal device is connected to the system. The DS2109 sat-
isfies this requirement by offering the engineer a choice
of onboard current sensing circuitry or onboard ground
detect circuitry. If an external device is connected, the
DS2109 will automatically be isolated from the SCSI
bus thereby maintaining proper system termination.
The DS2109 integrates a low drop–out regulator, 18
precise switched 110 ohm termination resistors, and
bus termination sensors into a 28–pin 300 mil SOIC
package. Active termination provides: greater immu-
nity to voltage drops on the TERMPWR (TERMination
PoWeR) line, enhanced high–level noise immunity,
intrinsic TERMPWR decoupling, and very low quies-
cent current consumption. The DS2109 contains an
output port that can control the power down pin of addi-
tional terminators (DS21S07A) for Wide SCSI applica-
tions.
相關(guān)PDF資料 |
PDF描述 |
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| DS2114Z | 9-LINE 110 ohm SCSI BUS TERMINATOR, PDSO16 |
| DS2117MB | 9-LINE 52 ohm SCSI BUS TERMINATOR, PDSO36 |
| DS2118M | 9-LINE SCSI BUS TERMINATOR, PDSO36 |
| DS2119ME | 9-LINE 52 ohm SCSI BUS TERMINATOR, PDSO28 |
| DS2154LN | DATACOM, FRAMER, PQFP100 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 類別:集成電路 (IC) >> 接口 - 信號終端器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 類型:SCSI，SE 端子數(shù):9 電源電壓:4 V ~ 5.25 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC 包裝:管件 |
| DS2109S-T | 制造商:Maxim Integrated Products 功能描述: |
| DS210SY06 | 制造商:n/a 功能描述:Power Diode |
| DS211 | 功能描述:安裝硬件 GASKET RoHS:否 制造商:Harwin 類型:SMT Cable Clip 材料:Phosphor Bronze 安裝孔大小: 長度:5 mm 外徑: 內(nèi)徑: 厚度: 電鍍:Tin 螺紋大小: |
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