參數(shù)資料
型號: SP3220E
元件分類: 外設(shè)及接口
英文描述: Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????)
中文描述: 單電源RS232C接口線路驅(qū)動器/接收器(單電源RS232C接口線收發(fā)器(2發(fā)2收))
文件頁數(shù): 14/18頁
文件大小: 169K
代理商: SP3220E
SP3220E DS/04 SP3220E True +3.0 to +5.0V RS-232 Transceivers
Copyright 2000 Sipex Corporation
14
Figure 16. ESD Test Waveform for IEC1000-4-2
30A
I
0A
15A
t=30ns
t
t=0ns
Device Pin
Tested
Human Body
Model
IEC1000-4-2
Air Discharge Direct Contact Level
Driver Outputs
Receiver Inputs
+15kV
+15kV
+15kV
+15kV
+8kV
+8kV
4
4
Table 3. Transceiver ESD Tolerance Levels
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
S
)
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.
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