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PDF SP213EH Data sheet ( Hoja de datos )
| Número de pieza | SP213EH | |
| Descripción | High Speed +5V High Performance RS-232 Transceivers | |
| Fabricantes | Exar | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SP213EH (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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SP211EH/213EH
High Speed +5V High Performance
RS-232 Transceivers
■ Single +5V Supply Operation
■ 0.1μF External Charge Pump Capacitors
■ 500kbps Data Rate Under Load
■ Standard SOIC and SSOP Footprints
■ Lower Supply Current Than Competition
(typical 3mA)
■ 1μA Shutdown Mode
■ Wake-Up Feature in Shutdown Mode
■ Tri-State Receiver Outputs
■ Ideal for High Speed RS-232 Applications
■ Improved ESD Specifications:
+15kV Human Body Model
+15kV IEC 61000-4-2 Air Discharge
+8kV IEC 61000-4-2 Contact Discharge
Now Available in Lead Free Packaging
+5V INPUT
0.1µF
6.3V
0.1µF
6.3V
0.1µF
16V
12
+
C1 +
11
VCC
14 C1 –
15
+
C2 +
16 C2 –
SP211EH
0.1µF
+ 6.3V
V + 13
V – 17
0.1µF
16V
+
400KOHM
T1 IN 7
400KOHM
T1
2 T1 OUT
T2 IN 6
400KOHM
T2
3 T2 OUT
T3 IN 20
400KOHM
T3
1 T3 OUT
T4 IN 21
T4 28 T4 OUT
R1 OUT 8
R2 OUT 5
R3 OUT 26
R4 OUT 22
R1
5KOHM
R2
5KOHM
R3
5KOHM
R4
9 R1 IN
4 R2 IN
27 R3 IN
23 R4IN
R5 OUT 19
EN 24
5KOHM
R5
5KOHM
10
GND
18 R5 IN
25 SD
DESCRIPTION
The SP211EH/213EH devices are high speed enhanced multi-channel RS-232 line transceiv-
ers with improved electrical performance. The SP211EH/213EH series is a superior drop-in
replacement to our previous versions as well as popular industry standards. All devices fea-
ture very low power CMOS construction and the Exar-patented (5,306,954) on-board charge
pump circuitry that generates the +/-10V RS-232 voltage levels using 0.1µF charge pump
capacitors. The SP211EH and SP213EH devices feature a low-power shutdown mode, which
reduces power supply drain to 1µA. Enhancements to this series include a higher transmis-
sion rate of 500kbps, a lower power supply current at 3mA typical (no load), and superior
ESD performance. The ESD tolerance has been improved for this series to over +/-15kV for
both Human Body Model and IEC61000-4-2 Air Discharge test methods.
Model
SP211EH
SP213EH
No. of RS-232
Drivers Receivers
45
45
No. of Receivers
Active in Shutdown
0
2
No. of External
0.1µF Capacitors
4
4
Shutdown
Yes
Yes
Wake-Up
No
Yes
Table 1. Model Selection Table
TTL
Tri-State
Yes
Yes
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP211EH_213EH_101_060111
1 page  
features
As in the original RS-232 multi-channel
products, the SP211EH and SP213EH high
speed multi–channel RS-232 line transceiv-
ers provide a variety of configurations to fit
most designs, especially high speed appli-
cations where +/-12V is not available. The
SP211EH/213EH is a superior high speed
drop-in replacement to our previous versions
as well as popular industry standards.
All devices in this series feature low–power
CMOS construction and Exar's–proprietary
on-board charge pump circuitry to generate
the RS-232 signal voltages. The ability to
use 0.1µF charge pump capacitors saves
board space and reduces production costs.
The devices in this series provide different
driver/receiver combinations to match any
application requirement.
The SP211EH and SP213EH models feature
a low–power shutdown mode, which reduces
power supply drain to 1µA. The SP213EH
includes a Wake-Up function which keeps
two receivers active in the shutdown mode,
unless disabled by the EN pin.
The family is available in 28 SOIC (wide)
and SSOP (shrink) small outline packages.
Devices can be specified for commercial (0˚C
to +70˚C) and industrial/extended (–40˚C to
+85˚C) operating temperatures.
Theory of Operation
The SP211EH and SP213EH devic-
es are made up of three basic cir-
cuit blocks — 1) transmitter/driver,
2) receiver and 3) the EXAR–proprietary
charge pump. Each model within the series
incorporates variations of these circuits to
achieve the desired configuration and per-
formance.
Transmitter/Drivers
The drivers of this series can maintain a
typical data rate of 500kbps.
This superior RS-232 data transmission
rate makes the SP211EH/213EH series an
ideal match for many designs in personal
computer peripherals and LAN applications
that demand high speed performance.
The drivers are inverting transmitters, which
accept either TTLor CMOS inputs and output
the RS-232 signals with an inverted sense
relative to the input logic levels. Typically, the
RS-232 output voltage swing is +/-9V with
no load, and +/-5V minimum with full load.
The transmitter outputs are protected against
infinite short–circuits to ground without
degradation in reliability. The drivers of the
SP211EH, and SP213EH can be tri–stated
by using the SHUTDOWN function.
In the "power-off" state, the output imped-
ance will remain greater than 300 ohms,
again satisfying the RS-232 specifications.
Should the input of the driver be left open,
an internal 400k ohm pull-up resistor to VCC
forces the input high, thus committing the
output to a low state. The slew rate of the
transmitter output is internally limited to a
maximum of 30V/µs in order to meet the
EIA/RS-232 and ITU V.28 standards. The
transition of the output from high to low also
meets the monotonicity requirements of the
standard.
Receivers
The high performance receivers of the
SP211EH/213EH devices can accept input
signals at a typical data rate or 500kbps. The
receivers convert RS-232 level input signals
to inverted TTL level signals. Since the input
is usually from a transmission line where long
cable lengths and system interference can
degrade the signal, the inputs have a typical
hysteresis margin of 500mV. This ensures
that the receiver is virtually immune to noisy
transmission lines. Should an input be left
unconnected, a 5kΩ pull-down resistor to
ground will commit the output of the receiver
to a high state.
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP211EH_213EH_101_060111
5 Page 
RC
DC Power
Source
SW1
Contact-Discharge Model
RS RV
SW2
CS
Device
Under
Test
RS and RV add up to 330Ω for IEC61000-4-2.
Figure 11. ESD Test Circuit for IEC61000-4-2
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 situa-
tions 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 10 and 11 repre-
sent the typical ESD testing circuit used for
awliltthhrteheemDeCthopdosw. eTrhseuCpSpilsyinwithiaellny
charged
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 (RS) and the source capacitor
30A
15A
0A
t=0ns
t
t=30ns
Figure 12. ESD Test Waveform for IEC61000-4-2
(CS) are 1.5kΩ an 100pF, respectively. For
IEC-61000-4-2, the current limiting resistor
(aRnS1) 5a0npdFth, eressopuerccteivcealyp.acitor (CS) are 330Ω
TthheeIEhCig6h1e0r 0C0S-4v-a2lumeoadnedl alroewmeor rReSsvtrainlugeenint
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.
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
11
SP211EH_213EH_101_060111
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet SP213EH.PDF ] | |
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