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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP207E_100_072309
Table 1. Model Selection Table
DESCRIPTION
The SP207E-SP213E are enhanced transceivers intended for use in RS-232 and V.28 se-
rial communication. These devices feature very low power consumption and single-supply
operation making them ideal for space-constrained applications. Exar-patented (5,306,954)
on-board charge pump circuitry generates fully compliant RS-232 voltage levels using small
and inexpensive 0.1µF charge pump capacitors. External +12V and -12V supplies are not
required. The SP211E and SP213E feature a low-power shutdown mode, which reduces
power supply drain to 1µA. SP213E includes two receivers that remain active during shut-
down to monitor for signal activity.
The SP207E-SP213E devices are pin-to-pin compatible with our previous SP207, SP208,
SP211 and SP213 as well as industry-standard competitor devices. Driver output and re-
ceiver input pins are protected against ESD to over ±15kV for both Human Body Model and
IEC1000-4-2 Air Discharge test methods. Data rates of over 120kbps are guaranteed with
230kbps typical, making them compatible with high speed modems and PC remote-access
applications. Receivers also incorporate hysteresis for clean reception of slow moving
signals.
T
1
IN
+5V INPUT
T
1
OUT
0.1µF
6.3V 0.1µF
6.3V
0.1µF
16V
0.1µF
16V
0.1µF
6.3V
+
+
+
+
C
1
+
C
1
–
C
2
+
C
2
–
V +
V –
V
CC
T
2
IN T
2
OUT
T
3
IN T
3
OUT
T
4
IN T
4
OUT
R
1
OUT R
1
IN
10
12
13
14
7
6
18
19
17
9
11
15
2
3
1
24
4
SP207E
T
1
T
2
T
3
T
4
8
TTL/CMOS INPUTS
RS-232 OUTPUTS
GND
R
2
OUT R
2
IN
5
23
R
3
OUT R
3
IN
22
16
R
1
R
2
R
3
TTL/CMOS OUTPUTS
RS-232 INPUTS
T
5
IN T
5
OUT
21 20
T
5
400kΩ
400kΩ
400kΩ
400kΩ
400kΩ
5kΩ
5kΩ
5kΩ
Now Available in Lead Free Packaging
■ MeetsAllEIA-232andITUV.28
Specications
■ Single+5VSupplyOperation
■ 3mATypicalStaticSupplyCurrent
■ 4x0.1μFExternalChargePumpCapacitors
■ Typical230kbpsTransmissionRates
■ StandardSOICandSSOPFootprints
■ 1μAShutdownMode(SP211E&SP213E)
■ TwoWake-UpReceivers(SP213E)
■ Tri-State/RxEnable(SP211E&SP213E)
■ ImprovedESDSpecications:
+15kV Human Body Model
+15kV IEC1000-4-2 Air Discharge
+8kV IEC1000-4-2 Contact Discharge
Low Power, High ESD +5V RS-232 Transceivers
SP207E–SP213E
Device Drivers Receivers Pins
SP207E 5 3 24
SP208E 4 4 24
SP211E 4 5 28
SP213E 4 5 28
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2
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional opera-
tion of the device at these or any other above those
indicatedintheoperationsectionsofthespecica-
tions below is not implied. Exposure to absolute
maximum rating conditions for extended periods of
time may affect reliability.
VCC ..................................................................+6V
V+ ...................................... (VCC – 0.3V) to +13.2V
V– .................................................................13.2V
Input Voltages
TIN ........................................ –0.3V to (VCC +0.3V)
RIN .................................................................±20V
OutputVoltages
TOUT ............................... (V+, +0.3V) to (V–, –0.3V)
ROUT ...................................... –0.3V to (VCC +0.3V)
Short Circuit Duration on TOUT ............. Continuous
SPECIFICATIONS
VCC at nominal ratings; 0.1µF charge pump capacitors; TMIN to TMAX, unless otherwise noted.
Power Dissipation Per Package
24-pinSSOP(derate11.2mW/oC above +70oC)....900mW
24-pinSOIC(derate12.5mW/oC above +70oC)...1000mW
28-pinSSOP(derate11.2mW/oC above +70oC)....900mW
28-pinSOIC(derate12.7mW/oC above +70oC)...1000mW
PARAMETER MIN. TYP. MAX. UNIT CONDITIONS
TTL INPUTS TIN, EN, SD
Logic Threshold VIL 0.8 Volts
Logic Threshold VIH 2.0 Volts
LogicPull-UpCurrent 15 200 µA TIN = 0V
Maximum Transmission Rate 120 230 kbps CL = 1000pF, RL=3kΩ
TTL OUTPUTS
Compatibility TTL/CMOS
VOL 0.4 Volts IOUT=3.2mA:Vcc=+5V
VOH 3.5 Volts IOUT = -1.0mA
Leakage Current 0.05 +/-10 µA 0V≤VOUT≤Vcc;SP211EEN
= 0V; SP213E EN = Vcc, TA =
+25ºC
RS-232 OUTPUT
OutputVoltageSwing +/-5 +/-7 Volts All transmitter outputs loaded
with3kΩtoground
OutputResistance 300 ΩVcc = 0V; VOUT=+/-2V
OutputShortCircuitCurrent +/-25 mA Infinite Duration, VOUT = 0V
RS-232 INPUT
Voltage Range -15 +15 Volts
Voltage Threshold Low 0.8 1.2 Volts Vcc = 5V, TA = +25ºC
Voltage Threshold High 1.7 2.8 Volts Vcc = 5V, TA = +25ºC
Hysteresis 0.2 0.5 1.0 Volts Vcc = 5V
Resistance 3 5 7 kΩ VIN=+/-15V,TA = +25ºC
DYNAMIC CHARACTERISTICS
Driver Propagation Delay 1.5 µs TTL to RS-232
Receiver Propagation Delay 0.5 1.5 µs RS-232 to TTL
Instantaneous Slew Rate 30 V/µs CL = 50pF, RL=3-7kΩ;
TA=+25ºC;from+/-3V
3
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP207E_100_072309
TransmitterOutput@120kbps
RL=3KΩ,CL=2,500pF
TransmitterOutput@120kbps
RL=3KΩ,CL=1,000pF
SPECIFICATIONS
VCC at nominal ratings; 0.1µF charge pump capacitors; TMIN to TMAX, unless otherwise noted.
PARAMETER MIN. TYP. MAX. UNIT CONDITIONS
DYNAMIC CHARACTERISTICS continued
Transition Time 1.5 µs CL = 2500pF, RL=3kΩ,
Measured from -3V to +3V or
+3V to -3V
OutputEnableTime 400 ns
OutputDisableTime 250 ns
POWER REQUIREMENTS
Vcc SP207 4.75 5.00 5.25 Volts
Vcc all other parts 4.50 5.00 5.50 Volts
Icc 3 6 mA NoLoad:Vcc=+/-10%,TA =
+25ºC
Icc 15 mA All Transmitters RL=3kΩ
Shutdown Current 1 10 µA TA = +25ºC
ENVIRONMENTAL AND MECHANICAL
OperatingTemperature
Commercial, _C 0 +70 ºC
Extended, _E -40 +85 ºC
Storage Temperature -65 +125 ºC
Package
_A
_T
Shrink(SSOP)smalloutline
Wide(SOIC)smalloutline
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PINOUT
SP211E
SP213E
SP207E
SP208E
TransmitterOutput@240kbps
RL=3KΩ,CL=1,000pF
TransmitterOutput@240kbps
RL=3KΩ,CL=2,500pF
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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP207E_100_072309
FEATURES
The SP207E, SP208E, SP211E and
SP213E multi–channeltransceiverstmost
RS-232/V.28communicationneeds.Allof
thesedevicesfeaturelow–powerCMOScon-
struction and EXAR–proprietary on-board
charge pump circuitry to generate RS-232
signal-voltages, making them ideal for appli-
cations where +9V and -9V supplies are not
available.Thehighlyefcientchargepump
is optimized to use small and inexpensive
0.1µF charge pump capacitors, saving board
space and reducing overall circuit cost.
Each device provides a different driver/
receiver combination to match standard
application requirements. The SP207E is
a 5-driver, 3-receiver device, ideal for DCE
applications such as modems, printers or
other peripherals. SP208Eisa4-driver/4-
receiver device, ideal for providing hand-
shaking signals in V.35 applications or other
general-purpose serial communications.
The SP211E and SP213E are each 3-driver,
5-receiver devices ideal for DTE serial ports
on a PC or other data-terminal equipment.
The SP211E and SP213E feature a low–
power shutdown mode, which reduces power
supply drain to 1µA. The SP213E 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and24pinSO
(wide)andSSOP(shrink)smalloutlinepack-
ages.Devicescanbespeciedforcommer-
cial(0˚Cto+70˚C)andindustrial/extended
(–40˚Cto+85˚C)operatingtemperatures.
THEORY OF OPERATION
Exar RS-232 transceivers contain three
basiccircuitblocks—a)transmitter/driver,
b) receiver and c) the EXAR–proprietary
charge pump. SP211E and SP213E also
include SHUTDOWN and ENABLE func-
tions.
Transmitter/Drivers
The drivers are single-ended inverting trans-
mitters,whichaccepteitherTTLorCMOS
inputs and output the RS-232 signals with
an inverted sense relative to the input logic
levels. Should the input of the driver be left
open, an internal pullup to VCC forces the
input high, thus committing the output to a
logic-1 (MARK) 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 even when loaded. Driver output
voltage swing is ±7V (typical) with no load,
and ±5V or greater at maximum load. The
transmitter outputs are protected against
innite short–circuits to ground without
degradation in reliability.
The drivers of the SP211E, and SP213E
canbetri–statedbyusingtheSHUTDOWN
function. In this “power-off” state the charge
pump is turned off and VCC current drops to
1µA typical. Driver output impedance will
remain greater than 300Ω, satisfying the
RS-232andV.28specications.ForSP211E
SHUTDOWNisactivewhenpin25isdriven
high. For SP213ESHUTDOWNisactive
when pin 25 is driven low.
Receivers
The receivers convert RS-232 level input
signals to inverted TTL level signals. Because
signals are often received from a transmis-
sion line where long cables and system
interference can degrade signal quality, the
inputs have enhanced sensitivity to detect
weakened signals. The receivers also fea-
ture a typical hysteresis margin of 500mV for
clean reception of slowly transitioning signals
in noisy conditions. These enhancements
ensure that the receiver is virtually immune
to noisy transmission lines.
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP207E_100_072309
6
Receiver input thresholds are between 1.2
to 1.7 volts typical. This allows the receiver
todetectstandardTTLorCMOSlogic-level
signals as well as RS-232 signals. If a re-
ceiver input is left unconnected or un-driven,
a5kΩpulldownresistortogroundwillcommit
the receiver to a logic-1 output state.
Highly Efcient Charge–Pump
The onboard dual-output charge pump is
used to generate positive and negative signal
voltages for the RS-232 drivers. This enables
fully compliant RS-232 and V.28 signals from
a single power supply device.
The charge pumps use four external capaci-
tors to hold and transfer electrical charge.
The Exar–patented design (US Patent
#5,306,954) uses a unique approach com-
paredtoolder,less–efcientdesigns.The
pumps use a four–phase voltage shifting
technique to attain symmetrical V+ and V-
power supplies. An intelligent control oscil-
lator regulates the operation of the charge
pump to maintain the proper voltages at
maximumefciency.
Phase 1
VSS charge store and double — The positive
terminals of capacitors C1 and C2 are charged
from VCC
with their negative terminals initially
connected to ground. Cl+ is then connected
to ground and the stored charge from C1
–
is
superimposed onto C2
–
. Since C2+ is still
connected to VCC the voltage potential across
capacitor C2 is now 2 x VCC.
V
CC
= +5V
–5V –5V
+5V
V
SS
Storage Capacitor
V
DD
Storage Capacitor
C
1
C
2
C
3
C
4
+
+
+ +
–
–
––
Phase 2
— VSS transfer and invert — Phase two con-
nects the negative terminal of C2 to the VSS
storage capacitor and the positive terminal
of C2 to ground. This transfers the doubled
and inverted (V-) voltage onto C3. Meanwhile,
capacitor C1 charged from VCC to prepare it
for its next phase.
Phase 3
VDD charge store and double —Phase three
isidenticaltotherstphase.Thepositive
terminals of capacitors C1 and C2 are charged
from VCC
with their negative terminals initially
connected to ground. Cl+ is then connected
to ground and the stored charge from C1
– is
superimposed onto C2
–. Since C2+ is still
connected to VCC the voltage potential across
capacitor C2 is now 2 x VCC.
Phase 4
VDD transfer — The fourth phase connects
the negative terminal of C2 to ground and
the positive terminal of C2 to the VDD stor-
age capacitor. This transfers the doubled
(V+) voltage onto C4. Meanwhile, capacitor
C1 is charged from VCC to prepare it for its
next phase.
Figure 1. Charge Pump — Phase 1
V
CC
= +5V
–10V
V
SS
Storage Capacitor
V
DD
Storage Capacitor
C
1
C
2
C
3
C
4
+
+
+ +
–
–
––
Figure 2. Charge Pump — Phase 2
V
CC
= +5V
–5V –5V
+5V
V
SS
Storage Capacitor
V
DD
Storage Capacitor
C
1
C
2
C
3
C
4
+
+
+ +
–
–
––
Figure 3. Charge Pump — Phase 3
7
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP207E_100_072309
The Exar charge-pump generates V+ and V-
independently from VCC. Hence in a no–load
condition V+ and V- will be symmetrical.
Older charge pump approaches generate
V+ and then use part of that stored charge
to generate V-. Because of inherent losses,
the magnitude of V- will be smaller than V+
on these older designs.
Underlightlyloadedconditionstheintelligent
pump oscillator maximizes efciency by
running only as needed to maintain V+ and
V-. Since interface transceivers often spend
muchoftheirtimeatidle,thispower-efcient
innovation can greatly reduce total power
consumption. This improvement is made
possible by the independent phase sequence
of the Exar charge-pump design.
The clock rate for the charge pump typically
operates at greater than 15kHz, allowing
thepumptorunefcientlywithsmall0.1µF
capacitors.Efcientoperationdependson
rapidly charging and discharging C1 and
C2, therefore capacitors should be mounted
close to the IC and have low ESR (equivalent
series resistance). Low cost surface mount
ceramic capacitors (such as are widely used
for power-supply decoupling) are ideal for
use on the charge pump.
However the charge pumps are designed
to be able to function properly with a wide
range of capacitor styles and values. If
polarized capacitors are used, the positive
and negative terminals should be connected
as shown.
Figure 4. Charge Pump — Phase 4
V
CC
= +5V
+10V
V
SS
Storage Capacitor
V
DD
Storage Capacitor
C
1
C
2
C
3
C
4
+
+
+ +
–
–
––
Voltage potential across any of the capaci-
tors will never exceed 2 x VCC. Therefore
capacitors with working voltages as low as
10V rating may be used with a nominal VCC
supply. C1 will never see a potential greater
than VCC , so a working voltage of 6.3V is
adequate. The reference terminal of the
VDD capacitor may be connected either to
VCC or ground, but if connected to ground a
minimum 16V working voltage is required.
Higherworkingvoltagesand/orcapacitance
values may be advised if operating at higher
VCC or to provide greater stability as the
capacitors age.
+10V
a) C2
+
GND
GND
b) C2
–
–10V
Figure 5. Typical waveforms seen on ca-
pacitor C2 when all drivers are at maximum
load.
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP207E_100_072309
8
SHUTDOWN MODE
SP211E and SP213E feature a control input
which will shut down the device and reduce
the power supply current to less than 10µA,
making the parts ideal for battery–powered
systems. In shutdown mode the transmitters
will be tri–stated, the V+ output of the charge
pump will discharge to VCC, and the V– output
will discharge to ground. Shutdown will tri-
state all receiver outputs of the SP211E.
SP213E WAKEUP FUNCTION
On the SP213E, shutdown will tri-state re-
ceivers 1-3. Receivers 4 and 5 remain active
to provide a “wake-up” function and may be
used to monitor handshaking and control
inputsforactivity.Withonlytworeceivers
active during shutdown, the SP213E draws
only 5–10µA of supply current.
ManystandardUARTdevicesmaybecon-
guredtogenerateaninterruptsignalbased
on changes to the Ring Indicate (RI) or other
inputs. A typical application of this function
would be to detect modem activity with the
computer in a power–down mode. The ring
indicator signal from the modem could be
passed through an active receiver in the
SP213E that is itself in the shutdown mode.
The ring indicator signal would propagate
through the SP213E to the power manage-
ment circuitry of the computer to power up
the microprocessor and the SP213E driv-
ers. After the supply voltage to the SP213E
reaches +5.0V, the SHUTDOWN pin can
be disabled, taking the SP213E out of the
shutdown mode.
All receivers that are active during shutdown
maintain 500mV (typ.) of hysteresis. All
receivers on the SP213E may be put into
tri-state using the ENABLE pin.
SHUTDOWN CONDITIONS
For complete shutdown to occur and the
10µA power drain to be realized, the follow-
ingconditionsmustbemet:
SP211E:
• +5V must be applied to the SD pin
• ENABLE must be either Ground, +5.0V or
not connected
• the transmitter inputs must be either +5.0V
or not connected
• VCC must be +5V
• Receiver inputs must be >0V and <+5V
SP213E:
• 0V must be applied to the SD pin
• ENABLE must be either 0V, +5.0V or not
connected
• the transmitter inputs must be either +5.0V
or not connected
• VCC must be +5V
• Receiver inputs must be >0V and <+5V
9
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP207E_100_072309
Figure6.Wake–UpTiming
Table2.Shut-downandWake–UpTruthTables
RECEIVER ENABLE
SP211E and SP213E feature an enable
input, which allows the receiver outputs to
be either tri–stated or enabled. This can be
especially useful when the receiver is tied
directly to a shared microprocessor data
bus. For the SP211E, enable is active low;
that is, ZeroV applied to the ENABLE pin
will enable the receiver outputs. For the
SP213E, enable is active high; that is, +5V
applied to the ENABLE pin will enable the
receiver outputs.
+5V
0V
ENABLE
DISABLE
SD
ROUT DATA VALID
+5V
0V
ROUT
+5V
0V
ROUT
tWAIT
t0 (POWERUP)
ENABLE
DISABLE
SD
POWER UP WITH SD ACTIVE (Charge pump in shutdown mode)
POWER UP WITH SD DISABLED (Charge pump in active mode)
t0 (POWERUP)
tENABLE
DATA VALID
SD
DATA VALID DATA VALID DATA VALID
EXERCISING WAKE–UP FEATURE
t0 (POWERUP)
tENABLE tENABLE tENABLE
tWAIT
DISABLE DISABLEENABLE
tWAIT = 2ms typical, 3ms maximum
tENABLE = 1ms typical, 2ms maximum
VCC = +5V –10%; TA = 25 C
SP211E
SD EN# Drivers Receivers
0 1 Active Tri-State
0 0 Active Active
1 1 Off Tri-State
1 0 Off Tri-State
SP213E
SD# EN Drivers RX 1-3 RX 4-5
0 1 Off Tri-State Active
0 0 Off Tri-State Tr-State
1 1 Active Active Active
1 0 Active Tri-State Tri-State
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10
ESD TOLERANCE
The SP207E Family incorporates rug-
gedized ESD cells on all driver output
and receiver input pins. The ESD struc-
ture is improved over our previous fam-
ily for more rugged applications and
environments sensitive to electro-static
discharges 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) 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
specied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 7. This method will test the IC’s
capability to withstand an ESD transient
during normal handling such as in manu-
facturing 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,
R
C
Device
Under
Test
DC Power
Source
C
S
R
S
SW1 SW2
they must guarantee a certain amount of ESD
protection since the system itself is exposed
to the outside environment and human pres-
ence. 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 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 8.
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 person ready to connect
a cable onto the rear of the system only to
ndanunpleasantzap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.
Figure 7. ESD Test Circuit for Human Body Model
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R
S
and
R
V
add up to 330Ω for IEC1000-4-2.
R
C
Device
Under
Test
DC Power
Source
C
S
R
S
SW1 SW2
R
V
Contact-Discharge Model
Figure 8. ESD Test Circuit for IEC1000-4-2
Figure9.ESDTestWaveformforIEC1000-4-2
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 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nally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 rst
switch(SW1)ison.
Now that the capacitor is charged, the sec-
ond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 dura-
tion of voltage.
For the Human Body Model, the current
limiting resistor (RS) and the source capacitor
(CS)are1.5kΩan100pF,respectively.For
IEC-1000-4-2, the current limiting resistor
(RS) and the source capacitor (CS)are330Ω
an 150pF, respectively.
The higher CS value and lower RS 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.
t=0ns t=30ns
0A
15A
30A
t
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DEVICE PIN HUMAN BODY IEC1000-4-2
TESTED MODEL Air Discharge Direct Contact Level
DriverOutputs +15kV +15kV +8kV 4
Receiver Inputs +15kV +15kV +8kV 4
EIA STANDARDS
The Electronic Industry Association (EIA)
developed several standards of data
transmission which are revised and up-
dated in order to meet the requirements
of the industry. In data processing, there
are two basic means of communicating
between systems and components. The
RS--232 standard was rst introduced in
1962 and, since that time, has become an
industry standard.
Table 3. Transceiver ESD Tolerance Levels
The RS-232 is a relatively slow data exchange
protocol, with a maximum baud rate of only
20kbps, which can be transmitted over a
maximum copper wire cable length of 50 feet.
The SP207E through SP213E Series of data
communications interface products have
been designed to meet both the EIA protocol
standards, and the needs of the industry.
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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TYPICAL APPLICATION CIRCUITS...SP207E TO SP213E
Figure 10. Typical SP213E Application
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TYPICAL APPLICATION CIRCUITS...SP207E TO SP213E
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ORDERING INFORMATION
RS232Transceivers:
Model ......................Drivers ............................. Receivers ........................................Temperature Range .................................... Package Type
SP207ECA-L ...............5 ........................................3 .................................................... 0°C to +70°C ................................................. 24–pinSSOP
SP207ECT-L ..............5 ........................................3 .................................................... 0°C to +70°C .................................................. 24–pinSOIC
SP207EEA -L ...............5 ........................................3 ................................................ –40°C to +85°C ................................................. 24–pinSSOP
SP207EET-L ................5 ........................................3 ................................................ –40°C to +85°C .................................................. 24–pinSOIC
SP208ECA-L ...............4 ........................................4 .................................................... 0°C to +70°C ................................................. 24–pinSSOP
SP208ECT-L ...............4 ........................................4 .................................................... 0°C to +70°C .................................................. 24–pinSOIC
SP208EEA-L ...............4 ........................................4 ................................................ –40°C to +85°C .................................................24–pinSSOP
SP208EET-L ................4 ........................................4 ................................................ –40°C to +85°C .................................................. 24–pinSOIC
RS232TransceiverswithLow–PowerShutdownandTri–stateEnable:
Model ......................Drivers ............................. Receivers ........................................Temperature Range .................................... Package Type
SP211ECA-L.................4 .................................. ......5.....................................................0°C to +70°C ................................................28–pinSSOP
SP211ECT-L .................4 .................................. ......5.....................................................0°C to +70°C ................................................. 28–pinSOIC
SP211EEA-L .................4 ................................. ......5.................................................–40°C to +85°C ................................................ 28–pinSSOP
SP211EET-L .................4 .................................. ......5.................................................–40°C to +85°C ................................................. 28–pinSOIC
RS232TransceiverswithLow–PowerShutdown,Tri–stateEnable,andWake–UpFunction:
Model ......................Drivers ............................. Receivers ........................................Temperature Range .................................... Package Type
SP213ECA-L .......... 4 ........................................ 5, with 2 active in Shutdown.................0°C to +70°C ................................................ 28–pinSSOP
SP213ECT-L .......... 4 ........................................ 5, with 2 active in Shutdown.................0°C to +70°C ................................................. 28–pinSOIC
SP213EEA-L .......... 4 ........................................ 5, with 2 active in Shutdown.............–40°C to +85°C ................................................ 28–pinSSOP
SP213EET-L ........... 4 ........................................ 5, with 2 active in Shutdown.............–40°C to +85°C ................................................. 28–pinSOIC
PleaseconsultthefactoryforpricingandavailabilityonaTape-On-Reeloption.
Notice
EXAR Corporation reserves the right to make changes to any products contained in this publication in order to improve design, performance or reli-
ability. EXAR Corporation assumes no representation that the circuits are free of patent infringement. Charts and schedules contained herein are
onlyforillustrationpurposesandmayvarydependinguponauser'sspecicapplication.Whiletheinformationinthispublicationhasbeencarefully
checked;
no responsibility, however, is assumed for inaccuracies.
EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can
reasonablybeexpectedtocausefailureofthelifesupportsystemortosignicantlyaffectitssafetyoreffectiveness.Productsarenotauthorizedfor
useinsuchapplicationsunlessEXARCorporationreceives,inwritting,assurancestoitssatisfactionthat:(a)theriskofinjuryordamagehasbeen
minimized ; (b) the user assumes all such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances.
Copyright 2009 EXAR Corporation
Datasheet July 2009
SendyourInterfacetechnicalinquirywithtechnicaldetailsto:uarttechsupport@exar.com
Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited.
DATE REVISION DESCRIPTION
1/27/06 -- Legacy Sipex Datasheet
07/23/09 1.0.0 Convert to Exar format, update ordering information and
change rev to 1.0.0