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PDF SP2209E Data sheet ( Hoja de datos )
| Número de pieza | SP2209E | |
| Descripción | High ESD Dual Port RS-232 Transceiver | |
| Fabricantes | Exar | |
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SP2209E
High ESD Dual Port RS-232 Transceiver
FEATURES
■ Meets True EIA/TIA-232-F Standards
■ Complies with 89/336/EEC EMC Directive
■ Single +12V Power Supply
■ <5mA Low Power CMOS Operation
■ 100µA Low Standby Current
■ Operates With +3V or +5V Logic
■ Provides +3.3V to +5V Standby Supply
■ Two Complete Serial Ports, 6 Drivers And 10
Receivers
■ One Receiver On Each Port Active In Standby
■ Failsafe Receiver Outputs
■ 460kbps Minimum Data Rate
■ Ideal For High Speed RS-232 Applications
■ Low EMI Emissions (EN55022)
■ Pin Compatible To ADM2209E device
■ Enhanced ESD Specifications:
+15kV Human Body Model
+15kV IEC61000-4-2 Air Discharge
+8kV IEC61000-4-2 Contact Discharge
■ Fast Transient Burst (EFT) Immunity
(IEC61000-4-4)
Now Available in Lead Free Packaging
DESCRIPTION
The rugged, high ESD SP2209E device is a complete dual RS-232 port integrated onto a
single integrated circuit. Six drivers and ten receivers provide designers a dual port solution
fully meeting the EIA/TIA-232 and ITU-T V.28/V.24 communication protocols and can be
implemented in applications such as personal desktop computers and workstations. Features
include high transmission rates, low power consumption, an internal charge-pump power
supply that requires only two capacitors, space saving 38-pin TSSOP package dimensions,
and compatibility with the EU directive on electromagnetic compatibility. This device is ideal
for operation in electrically harsh environments or where RS-232 cables are frequently be-
ing plugged and unplugged. This device is also immune to high RF field strengths without
special shielding precautions.
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP2209E_100_071612
1 page  
PINOUT
Figure 1. Pinout Configuration for the SP2209E
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP2209E_100_071612
5 Page 
ESD Tolerance
The SP2209E device incorporates rug-
gedized ESD cells on all driver output and
receiver input pins. The ESD structure
is improved over our previous family for
more rugged applications and environ-
ments sensitive to electro-static dis-
charges and associated transients. The
improved ESD tolerance is at least +15kV
without damage nor latch-up.
There are different methods of ESD testing
applied:
a) MIL-STD-883, Method 3015.7
b) IEC 61000-4-2 Air-Discharge
c) IEC 61000-4-2 Direct Contact
The Human Body Model has been the
generally accepted ESD testing method
for semi-conductors. 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 10. This method will test the IC’s
capability to withstand an ESD transient
during normal handling such as in manu-
facturing areas where the IC's tend to be
handled frequently.
The IEC-61000-4-2, 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 IEC
RC
DESCRIPTION
61000-4-2 is that the system is required to
withstand an amount of static electricity when
ESD is applied to points and surfaces of the
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 IEC 61000-4-2 is shown
on Figure 11. There are two methods within
IEC 61000-4-2, 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 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 situ-
ations such as hand held systems, the ESD
charge can be directly discharged to the
RS
DC Power
Source
SW1
CS
SW2
Device
Under
Test
Figure 10. ESD Test Circuit for Human Body Model
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
11
SP2209E_100_071612
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet SP2209E.PDF ] | |
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