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參數(shù)資料
| 型號： | UC5605DPTR |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Very low drop voltage regulators with inhibit |
| 中文描述： | 終結者 |
| 文件頁數(shù)： | 4/6頁 |
| 文件大?。?/td> | 386K |
| 代理商： | UC5605DPTR |
Typical SCSI Bus Configuration Using the UC5602
UC5602
A Look at the Response of a SCSI-2 Cable
Figure 1 shows a single line of a SCSI cable. The driver
is an open colletor type which when asserted pulls low,
and when negated the termination resistance serves as
the pull-up.
Figure 2 shows a worst case scenario of mid cable de-
assertion with a close proximity receiver. The voltage
V
STEP
is defined as:
V
STEP
= V
OL
+I
O
Z
0
Driver Output Low Voltage
Current from Receiving Terminator
Cable Characteristic Impedance
V
OL
=
I
O
Z
0
=
=
I
O
=
V
REG
V
OL
110
In the pursuit of higher data rates, sampling could occur
during this step portion, therefore it is important to ensure
that the step is as high as possible to get the most noise
margin. For this reason the UC5602 is trimmed so that
the output current (I
O
) is as close as possible to the SCSI
max current spec of 22.4mA. The Termination impedance
is initially trimmed on the IC to 110 ohms typical, then the
regulator voltage is trimmed for the highest output cur-
rent to within 22.4mA.
Figure 1. A Single Line of a SCSI Cable
Figure 2. A Typical Response of a SCSI Cable
UDG-94054
UDG-94055
UDG-94053
4
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相關PDF資料 |
PDF描述 |
|---|---|
| UC5605J | Very low drop voltage regulators with inhibit |
| UC5605N | Very low drop voltage regulators with inhibit |
| UC5605PWP | Very low drop voltage regulators with inhibit |
| UC5605PWPTR | Very low drop voltage regulators with inhibit |
| UC5607DWP | Very low drop voltage regulators with inhibit |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| UC5605J | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Terminator |
| UC5605N | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Terminator |
| UC5605PWP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Terminator |
| UC5605PWPTR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Terminator |
| UC5607 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Plug and Play, 18-Line SCSI Active Terminator |
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