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| 型号： | SP3221 |
| 元件分类： | 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收发器与0.1uF电容 |
| 文件页数： | 15/18页 |
| 文件大小： | 115K |
| 代理商： | SP3221 |
15
Date: 7/21/04
SP3221E +3.0V to +5.5V RS-232 Transceiver
Copyright 2004 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
R
R
S
R
R
V
for IEC1000-4-2.
R
S
and
R
V
add up to 330
Contact-Discharge Module
R
R
V
V
V
R
R
C
C
C
C
S
S
R
R
S
S
SW1
SW2
R
C
Device
Under
Test
DC Power
Source
C
S
R
S
The circuit model in
Figures 17
and
18
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
1.5k
an 100pF, respectively. For IEC-1000-4-
2, the current limiting resistor (R
) and the source
capacitor (C
S
) are 330
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 19. ESD Test Waveform for IEC1000-4-2
t=0ns
t=30ns
0A
15A
30A
t
i
Figure 18. ESD Test Circuit for IEC1000-4-2
Table 4. Transceiver ESD Tolerance Levels
相关PDF资料 |
PDF描述 |
|---|---|
| SP3221E | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| SP3221ECA | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| SP3221ECY | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| SP3221EEY | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| SP3221EEA | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SP3221E | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Intelligent +3.0V to +5.5V RS-232 Transceiver |
| SP3221ECA | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Intelligent +3.0V to +5.5V RS-232 Transceiver |
| SP3221ECA/TR | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Intelligent +3.0V to +5.5V RS-232 Transceiver |
| SP3221ECY | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Intelligent +3.0V to +5.5V RS-232 Transceiver |
| SP3221ECY/TR | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Intelligent +3.0V to +5.5V RS-232 Transceiver |
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