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參數(shù)資料
| 型號： | SP3249 |
| 元件分類： | RS-232 |
| 英文描述： | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| 中文描述： | 5V的高速RS - 232收發(fā)器與0.1uF電容 |
| 文件頁數(shù)： | 11/14頁 |
| 文件大?。?/td> | 128K |
| 代理商： | SP3249 |
11
Rev.4/08/02
SP3249E Intelligent +3.0V to +5.5V RS-232 Transceivers
Copyright 2002 Sipex Corporation
DEVICE PIN
TESTED
HUMAN BODY
MODEL Air Discharge Direct Contact Level
IEC1000-4-2
Driver Outputs
Receiver Inputs
±
15kV
±
15kV
±
15kV
±
15kV
±
8kV
±
8kV
4
4
The circuit model in Figures 16
and 17 represent
the typical ESD testing circuit used for all three
methods. The C
S
is initially charged with the DC
power supply when the first switch (SW1) is on.
Now that the capacitor is charged, the second
switch (SW2) is on while SW1 switches off. The
voltage stored in the capacitor is then applied
through R
S
, the current limiting resistor, onto the
device under test (DUT). In ESD tests, the SW2
switch is pulsed so that the device under test
receives a duration of voltage.
For the Human Body Model, the current limiting
resistor (R
) and the source capacitor (C
) are
1.5kW an 100pF, respectively. For IEC-1000-4-
2, the current limiting resistor (R
) and the source
capacitor (C
S
) are 330W an 150pF, respectively.
The higher C
value and lower R
value in the
IEC1000-4-2 model are more stringent than the
Human Body Model. The larger storage capacitor
injects a higher voltage to the test point when
SW2 is switched on. The lower current limiting
resistor increases the current charge onto the test
point.
Figure 18. ESD Test Waveform for IEC1000-4-2
t=0ns
t=30ns
0A
15A
30A
t
i
Figure 17. ESD Test Circuit for IEC1000-4-2
Table 2. Transceiver ESD Tolerance Levels
R
R
S
R
R
V
R
S
and
R
V
add up to 330
for IEC1000-4-2.
Contact-Discharge Module
R
V
V
R
V
R
R
C
C
C
C
S
S
R
R
S
S
SW1
SW2
C
Device
Under
Test
DC Power
Source
S
R
S
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SP3249E | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Intelligent +3.0V to +5.5V RS-232 Transceivers |
| SP3249ECA | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Intelligent +3.0V to +5.5V RS-232 Transceivers |
| SP3249ECA-L | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
| SP3249ECA-L/TR | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
| SP3249ECY | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
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