Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

SP485EEP Datasheet(PDF) 8 Page - Sipex Corporation

Part # SP485EEP
Description  Enhanced Low Power Half-Duplex RS-485 Transceivers
Download  11 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  SIPEX [Sipex Corporation]
Direct Link  http://www.sipex.com
Logo SIPEX - Sipex Corporation

SP485EEP Datasheet(HTML) 8 Page - Sipex Corporation

Back Button SP485EEP Datasheet HTML 3Page - Sipex Corporation SP485EEP Datasheet HTML 4Page - Sipex Corporation SP485EEP Datasheet HTML 5Page - Sipex Corporation SP485EEP Datasheet HTML 6Page - Sipex Corporation SP485EEP Datasheet HTML 7Page - Sipex Corporation SP485EEP Datasheet HTML 8Page - Sipex Corporation SP485EEP Datasheet HTML 9Page - Sipex Corporation SP485EEP Datasheet HTML 10Page - Sipex Corporation SP485EEP Datasheet HTML 11Page - Sipex Corporation  
Zoom Inzoom in Zoom Outzoom out
 8 / 11 page
background image
Rev. 5/16/03
SP481E Low Power Half-Duplex RS485 Transceivers
© Copyright 2003 Sipex Corporation
8
With the Air Discharge Method, an ESD voltage
is applied to the equipment under test (EUT)
through air. This simulates an electrically charged
person ready to connect a cable onto the rear of
the system only to find an unpleasant zap just
before the person touches the back panel. The
high energy potential on the person discharges
through an arcing path to the rear panel of the
system before he or she even touches the system.
This energy, whether discharged directly or
through air, is predominantly a function of the
discharge current rather than the discharge
voltage. Variables with an air discharge such as
approach speed of the object carrying the ESD
potential to the system and humidity will tend to
change the discharge current. For example, the
rise time of the discharge current varies with the
approach speed.
The Contact Discharge Method applies the ESD
current directly to the EUT. This method was
devised to reduce the unpredictability of the
ESD arc. The discharge current rise time is
constant since the energy is directly transferred
without the air-gap arc. In situations such as
hand held systems, the ESD charge can be directly
discharged to the equipment from a person already
holding the equipment. The current is transferred
on to the keypad or the serial port of the equipment
directly and then travels through the PCB and finally
to the IC.
The circuit model in Figures 7 and 8 represent
the typical ESD testing circuit used for all three
methods. The CS 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 RS, 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
S) and the source capacitor (CS) are
1.5k
Ω an 100pF, respectively. For IEC-1000-4-
2, the current limiting resistor (R
S) and the source
capacitor (C
S) are 330Ω an 150pF, respectively.
The higher C
S value and
lower R
S 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 9. ESD Test Waveform for IEC1000-4-2
t=0ns
t=30ns
0A
15A
30A
t
HUMAN BODY
IEC1000-4-2
MODEL
Air Discharge
Direct Contact
Level
Driver Outputs
±15kV
±15kV
±8kV
4
Receiver Inputs
±15kV
±15kV
±8kV
4
SP481E, SP485E
FAMILY


Similar Part No. - SP485EEP

ManufacturerPart #DatasheetDescription
logo
Sipex Corporation
SP485EEP SIPEX-SP485EEP Datasheet
100Kb / 11P
   Enhanced Low Power Half-Duplex RS-485 Transceivers
logo
Exar Corporation
SP485EEP-L EXAR-SP485EEP-L Datasheet
618Kb / 12P
   Enhanced Low Power Half-Duplex RS-485 Transceivers
More results

Similar Description - SP485EEP

ManufacturerPart #DatasheetDescription
logo
Exar Corporation
SP481E EXAR-SP481E Datasheet
618Kb / 12P
   Enhanced Low Power Half-Duplex RS-485 Transceivers
logo
Sipex Corporation
SP481E SIPEX-SP481E_07 Datasheet
712Kb / 11P
   Enhanced Low Power Half-Duplex RS-485 Transceivers
SP481E SIPEX-SP481E Datasheet
100Kb / 11P
   Enhanced Low Power Half-Duplex RS-485 Transceivers
logo
Exar Corporation
SP1481E EXAR-SP1481E Datasheet
576Kb / 10P
   Enhanced Low Power Half-Duplex RS-485 Transceivers
logo
Sipex Corporation
SP1485E SIPEX-SP1485E Datasheet
78Kb / 11P
   Enhanced Low Power Half-Duplex RS-485 Transceivers
SP1481E SIPEX-SP1481E Datasheet
73Kb / 11P
   짹15kV Enhanced Low Power Half-Duplex RS-485 Transceivers
logo
Exar Corporation
SP483 EXAR-SP483_17 Datasheet
633Kb / 13P
   Low Power Half-Duplex RS-485 Transceivers
logo
Sipex Corporation
SP481 SIPEX-SP481 Datasheet
100Kb / 10P
   Low Power Half-Duplex RS-485 Transceivers
SP481 SIPEX-SP481 Datasheet
78Kb / 10P
   Low Power Half-Duplex RS-485 Transceivers
logo
Exar Corporation
SP485EN-L EXAR-SP485EN-L Datasheet
564Kb / 11P
   Low Power Half-Duplex RS-485 Transceivers
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com