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參數(shù)資料
| 型號： | DS2114Z |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 2/6頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TERM SCSI 2% 150MIL 16-SOIC |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 50 |
| 類型： | SCSI，SE |
| 端子數(shù)： | 9 |
| 電源電壓： | 4 V ~ 5.5 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 |
DS2114
070198 2/6
FUNCTIONAL DESCRIPTION
The DS2114 consists of a bandgap reference, buffer
amplifier, and nine termination resistors (Figure 1). The
bandgap reference circuit produces a precise 2.55 volts
level which is fed to a buffer amplifier. The buffer pro-
duces a 2.85 volts level and is capable of sourcing at
least 24 mA into each of the termination resistors when
the signal line is low (active). When the driver for a given
signal line turns off, the terminator will pull the signal line
to 2.85 volts (quiescent state). To handle actively ne-
gated SCSI signals, the buffer can sink at least 200 mA
and Vref will move less than 60 mV. When all lines settle
in the quiescent state, the regulator will consume about
2.5 mA.
To ensure proper operation, both the TERMPWR1 and
TERMPWR2 pins must be connected to the SCSI bus
TERMPWR line and both the VREF1 and VREF2 pins
must be tied together externally. Each DS2114 requires
a 4.7
F capacitor connected between the VREF pins
and ground. Figure 2 details a typical SCSI bus configu-
ration. In an 8–bit wide SCSI bus arrangement (“A”
Cable), two DS2114’s would be needed at each end of
the SCSI cable in order to terminate the 18 active signal
lines. In a 16–bit wide SCSI bus arrangement (“P”
Cable), three DS2114’s would be needed at each end of
the SCSI cable in order to terminate the 27 active signal
lines.
DS2114 BLOCK DIAGRAM Figure 1
GND
TERMPWR1
TERMPWR2
BANDGAP
REFERENCE
R1
R2
R3
R4
R5
R6
R7
R8
R9
VREF1
VREF2
+
–
110 ohms
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|---|---|
| DS2114Z/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 |
| DS2116E | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Terminator |
| DS2116FP000 | 制造商:Thomas & Betts 功能描述:200A,CON,2P3W,MG,116,120V |
| DS2116MR000 | 制造商:Thomas & Betts 功能描述:200A,NLT,2P3W,MG,116.120V |
| DS2117M | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Ultra3 LVD/SE SCSI Terminator |
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