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| 型號： | SP490EEN |
| 英文描述： | Enhanced Full Duplex RS-485 Transceivers |
| 中文描述： | 增強型全雙工RS - 485接口收發(fā)器 |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 109K |
| 代理商： | SP490EEN |
SP490EDS/14
SP490E Enhanced Full Duplex RS-485 Transceivers
Copyright 2000 Sipex Corporation
8
There are different methods of ESD testing
applied:
a) MIL-STD-883, Method 3015.7
b) IEC1000-4-2 Air-Discharge
c) IEC1000-4-2 Direct Contact
The Human Body Model has been the generally
accepted ESD testing method for semiconductors.
This method is also specified in MIL-STD-883,
Method 3015.7 for ESD testing. The premise of
this ESD test is to simulate the human body’s
potential to store electro-static energy and
discharge it to an integrated circuit. The
simulation is performed by using a test model as
shown in
Figure 9
. This method will test the IC’s
capability to withstand an ESD transient during
normal handling such as in manufacturing areas
where the ICs tend to be handled frequently.
The IEC-1000-4-2, formerly IEC801-2, is
generally used for testing ESD on equipment and
systems. For system manufacturers, they must
guarantee a certain amount of ESD protection
since the system itself is exposed to the outside
environment and human presence. The premise
with IEC1000-4-2 is that the system is required
to withstand an amount of static electricity when
ESD is applied to points and surfaces of the
R
f
RS and RV add up to 330
f
or IEC1000-4-2.
Contact-Discharge Module
R
R
V
V
V
R
R
C
C
C
C
S
S
R
R
S
S
SW1
SW2
C
Device
Under
Test
DC Power
Source
S
S
Figure 10. ESD Test Circuit for IEC1000-4-2
Figure 11. ESD Test Waveform for IEC1000-4-2
t=0ns
t=30ns
0A
15A
30A
t
￥
i
￥
equipment that are accessible to personnel during
normal usage. The transceiver IC receives most
of the ESD current when the ESD source is
applied to the connector pins. The test circuit for
IEC1000-4-2 is shown on
Figure 10
. There are
two methods within IEC1000-4-2, the Air
Discharge method and the Contact Discharge
method.
With the Air Discharge Method, an ESD voltage
is applied to the equipment under test (EUT)
through air. This simulates an electrically charged
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SP490EEP | Enhanced Full Duplex RS-485 Transceivers |
| SP491E | Enhanced Full Duplex RS-485 Transceivers |
| SP491ECN | Enhanced Full Duplex RS-485 Transceivers |
| SP491ECP | Enhanced Full Duplex RS-485 Transceivers |
| SP491EEN | Enhanced Full Duplex RS-485 Transceivers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP490EEN-L | 功能描述:RS-422/RS-485 接口 IC RS485 10000 kbps 5V temp -40C to 85C RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| SP490EEN-L/TR | 功能描述:RS-485接口IC Full Duplex RS-485 s RoHS:否 制造商:Texas Instruments 數(shù)據(jù)速率:250 Kbps 工作電源電壓:3.3 V 電源電流:750 uA 工作溫度范圍:- 40 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| SP490EEP | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Enhanced Full Duplex RS-485 Transceivers |
| SP490EEP-L | 功能描述:RS-485接口IC Full Duplex RS-485 s RoHS:否 制造商:Texas Instruments 數(shù)據(jù)速率:250 Kbps 工作電源電壓:3.3 V 電源電流:750 uA 工作溫度范圍:- 40 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| SP490EEP-L | 制造商:Exar Corporation 功能描述:TRANSCEIVER, RS485, 10MBPS, 5V, DIP-8; Device Type:RS485 Transceiver; IC Interface Type:RS485; No. of Drivers:1; Supply Voltage Min:4.75V; Supply Voltage Max:5.25V; Driver Case Style:DIP; No. of Pins:8; Operating Temperature Max:85C;RoHS Compliant: No |
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