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參數(shù)資料
| 型號(hào)： | DS2125+T&R |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 5/7頁(yè) |
| 文件大小： | 0K |
| 描述： | IC TERM SCSI ULT3 LVD/SE 48-LQFP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,000 |
| 類型： | SCSI，LVD，SE |
| 端子數(shù)： | 15 |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-LQFP |
| 供應(yīng)商設(shè)備封裝： | 48-LQFP（7x7） |
| 包裝： | 帶卷 (TR) |
DS2125 Ultra3 LVD/SE SCSI 15-Line Terminator
5 of 7
Figure 2. SCSI Bus Configuration
Note: The following terms are used throughout this data sheet:
DIFFSENS: Refers to the SCSI bus signal.
DIFFSENSE: Refers to the DS2125 pin name and internal circuitry capable of driving the DIFFSENS line.
DIFF_CAP: Refers to the DS2125 pin name and internal circuitry relating to monitoring the DIFFSENS line.
DETAILED DESCRIPTION
The DS2125 combines LVD and SE termination with DIFFSENSE sourcing and detection. A bandgap reference is
fed into two amplifiers, which creates a 1.25V reference voltage and a 2.85V reference voltage. The control logic
determines which of these references are applied to the termination resistors. If the SCSI bus is in LVD mode, the
1.25V reference is used. If the SCSI bus is in SE mode, the 2.85V reference is used. That same control logic
switches in/out parallel resistors to change the total termination resistance accordingly. Finally, in SE mode the Rp
pins are switched to ground.
The DIFFSENSE circuitry decodes trinary logic. There is one of three voltages on the SCSI control line called
DIFFSENS. Two comparators and a NAND gate determine if the voltage is below 0.6V, above 2.15V, or in
between, which indicates the mode of the bus as SE, HVD, or LVD, respectively.
TERMPWR
4.7
F
0.1
F
DIFFSENSE
TPWR
ISO
VREF
DIFF_CAP
DIFFSENS
4.7
F
TPWR
ISO
VREF
DIFF_CAP
DIFFSENS
CONTROL LINES (15)
0.1
F
TPWR
ISO
VREF
DIFF_CAP
DIFFSENS
4.7
F
4.7
F
TPWR
ISO
VREF
DIFF_CAP
DIFFSENS
CONTROL LINES (15)
20k
20k
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS2127 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Ultra3 LVD/SE SCSI 14-Line Terminator |
| DS2127/T&R | 制造商:Maxim Integrated Products 功能描述:14 LINE LVD/SE TERMINATOR T&R - Tape and Reel |
| DS2127+ | 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 |
| DS2127+T&R | 制造商:Maxim Integrated Products 功能描述:IC TERM SCSI LVD/SE 48-LQFP |
| DS2127+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 |
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