參數(shù)資料
型號: DS2119M
英文描述: Ultra3 LVD/SE SCSI Terminator
中文描述: Ultra3 LVD/SE SCSI端接器
文件頁數(shù): 6/9頁
文件大?。?/td> 166K
代理商: DS2119M
DS2119M
6 of 9
Table 1.
PIN DESCRIPTION
PIN
SYMBOL
1
DESCRIPTION
VREF
Reference Voltage.
2.85V reference in SE mode and 1.25V reference in
LVD mode; must be decoupled with a 4.7μF cap.
Signal Termination.
Connect to SCSI bus signal lines.
2–5, 7–12,
18–21, 23–26
6, 22
RxP,
RxN
HS GND
Heat Sink Ground.
Internally connected to the mounting pad. Should
be grounded.
Isolation.
When pulled high, the DS2119M isolates its bus pins (RxP,
RxN) from the SCSI bus.
Ground.
Signal ground; 0V.
MSTR/SLV
Master/Slave.
Mode-select for the noncontrolling terminator. When
pulled high, MSTR enables the DIFFSENSE driver.
DIFFSENSE
DIFFSENSE.
Output to drive the SCSI bus DIFFSENS line.
DIFF_CAP
DIFFSENSE CAPACITOR.
Connect a 0.1μF capacitor for
DIFFSENSE filter. Input to detect the type of device (differential or
single-ended) on the SCSI bus.
TPWR
Termination Power.
Connect to the SCSI TERMPWR line and
decouple with a 2.2μF capacitor.
13
ISO
14
15
GND
16
17
27, 28
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Termpower Voltage
SE Mode
LVD Mode
Logic 0
Logic 1
Operating Temperature
SYMBOL
V
TPWR
(SE)
V
TPWR
(LVD)
V
IL
V
IH
V
AMB
MIN
4.0
2.7
-0.3
2.0
0
TYP
MAX
5.5
5.5
+0.8
V
TPWR
+ 0.3
70
UNITS
V
V
V
V
°C
NOTES
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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