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參數(shù)資料
| 型號(hào)： | DS2108 |
| 廠(chǎng)商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類(lèi)： | 通用總線(xiàn)功能 |
| 英文描述： | Differential SCSI Switchable Terminator(差分SCSI可轉(zhuǎn)換終端) |
| 中文描述： | 9-LINE 330 ohm SCSI BUS TERMINATOR, PDSO24 |
| 封裝： | 0.300 INCH, PLASTIC, SOIC-24 |
| 文件頁(yè)數(shù)： | 1/5頁(yè) |
| 文件大小： | 54K |
| 代理商： | DS2108 |
DS2108
Differential SCSI Switchable Terminator
DS2108
PRELIMINARY
022698 1/5
FEATURES
Fully compliant with SCSI, SCSI–2 and SCSI–3 stan-
dards
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 resis-
tors 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
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
PD
GND
R1P
R2P
R3P
R4P
R5P
R6P
R7P
R8P
R9P
GND
TPWR
R1N
R2N
R3N
R4N
R5N
R6N
R7N
R8N
R9N
TPWR
NC
DS2108S 24–PIN SOIC (300 MIL)
DESCRIPTION
The DS2108 SCSI Terminator has been specifically
designed for High Voltage Differential (HVD) SCSI sys-
tems 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 9 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 sup-
ports SCSI signal voltages of –7 to +12 volts when pow-
ered on or off. When all lines settle into the quiescent
state (no signal transitions), 56 mA is typically con-
sumed. Only 1 mA is typically consumed in the powered
down mode.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS2108S | 功能描述:IC TERM SCSI DIFF/SWITCH 24-SOIC RoHS:否 類(lèi)別:集成電路 (IC) >> 接口 - 信號(hào)終端器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 類(lèi)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(lèi)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 |
| DS2108S/T&R | 制造商:Maxim Integrated Products 功能描述:SCSI DIFFERENTIAL TERMINATOR-SO-TRL - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC TERM SCSI DIFF/SWITCH 24-SOIC |
| DS2108S/T&R | 功能描述:SCSI 接口集成電路 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 |
| DS2108S/T&R/C02 | 功能描述:SCSI 接口集成電路 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 |
| DS2108S/T&R/C03 | 功能描述:SCSI 接口集成電路 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 |
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