• Operates from a Single +5V Power Supply
• Meets all RS-232D and ITU V.28 Specifications• Operates with 0.μF to 0μF Ceramic Capacitors• No External Capacitors required (SP233E)• Low Power Shutdown (SP30E, SP32E)• High Data Rate - 20kbps under load• Low power CMOS Operation• Lead Free packaging available• Improved ESD Specifications: +/-5kV Human Body Model
DESCRIPTION
The SP202E, SP232E, SP233E, SP30E and SP32E devices are a family of line driver and re-ceiver pairs that meets the specifications of RS-232 and V.28 serial protocols. The devices are pin-to-pin compatible with Exar's SP232A, SP233A, SP30A and SP32A devices as well as popular industry standard pinouts. The ESD tolerance has been improved on these devices to over +/-5kV for Human Body Model. This series offer a 20kbps data rate under load, small ceramic type 0.μF charge pump capacitors and overall ruggedness for comercial applications. Features include Exar's BiCMOS design which allowing low power operation without sacrificing performance. The series is available in lead free packages with commercial and industrial temperature ranges.
SELECTION TABLE
Model
Number of RS-232Drivers
Receivers
No. of RX active in Shutdown
No. of External 0.μF Capacitors
Shutdown
WakeUp
TTL Tri-State
SP202ESP232ESP233ESP30ESP32E
2 2 2 2 2
2 2 2 2 2
0 0 0 0 2
4 4 0 4 4
No No No Yes Yes
No No No No Yes
No No No Yes Yes
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-7000 • www.exar.com SP202E,232E,233E, 30E, 32E_00_0608
This is a stress rating only and functional operation of the device at these ratings or any other above those indicated in the operation section of the specification is not implied. Exposure to absolute maximum ratings conditions for extended periods of time may affect re-liability.
Supply Voltage (VCC)....................................................+ 6VV+........................................................................... (Vcc-0.3V) to +.0VV- .............................................................................-.0VInput Voltages
Tin.....................................................-0.3V to (Vcc + 0.3V)Rin............................................................................+/-5VOutput Voltages
Tout...............................................(V+, +0.3V) to (V-, -0.3VRout...................................................-0.3V to (Vcc + 0.3V)
AbSoLUTE MAxiMUM RATingS
Short Circuit duration
Tout.....................................................ContinuousPackage Power Dissipation:
Plastic DIP...............................................375mW(derate 7mW/°C above +70°C)
Small Outline...........................................375mW(derate 7mW/°C above +70°C)
Storage Temperature..................-65°C to +50°C
Vcc = 5V ±0%, 0.μF charge pump capacitors, Tmin to Tmax, unless otherwise noted, Typical values are Vcc = 5V and Ta=25°C
PARAMETER
TTL inPUT
Logic Threshold LOWLogic Threshold HIGHLogic Pull-Up CurrentTTL oUTPUTOutput Voltge LOWOutput Voltage HIGH
Leakage Current **; Ta = +25°CRS-232 oUTPUTOutput Voltage SwingOutput Resistance
Output Short Circuit CurrentMaximum Data RateRS-232 inPUTVoltage Range
Voltage Threshold LOWVoltage Threshold HIGHHysteresisResistance
** SP30E and SP32E only
ELECTRiCAL CHARACTERiSTiCS
Min
TYP
MAx
UniT
TEST ConDiTionS
Tin, En, SD, On/OFFTin, En, SD, On/OFFTin = 0V
2.05
0.8VoltsVolts
200μA
iOuT = 3.2ma: Vcc = +5ViOuT = -1.0ma
En = Vcc, 0V ≤ VOuT ≤ Vcc
3.50.05
0.4VoltsVolts
+/-0μA
all Transmitter outputs loaded
+/-5.0with 3k ohms to GNDVcc = 0V, Vout = +/-2VInfinite DurationCL = 2500pF, RL = 3kΩ
20 300+/-6VoltsOhms
+/-8240
mAkbps
-5Vcc = 5V, Ta=25°CVcc = 5V, Ta=25°CVcc = 5V, Ta=25°C
0.2 3 0.8.2.70.55
+5VoltsVolts
2.8 .0 7VoltsVoltskΩ
Ta = 25°C, -15V ≤ Vin ≤ +15V
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-7000 • www.exar.com SP202E,232E,233E, 30E, 32E_00_0608
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Vcc = 5V ±0%, 0.μF charge pump capacitors, Tmin to Tmax, unless otherwise noted, Typical values are Vcc = 5V and Ta=25°C
Parameter
DYnAMiC CHARACTERiSTiCSDriver Propagation DelayReceiver Propagation DelayInstantaneous Slew RateTransition Region Slew RateOutput Enable Time **Output Disable Time **PoWER REQUiREMEnTSVcc Power Supply CurrentVcc Power Supply Current, LoadedShutdown Supply Current **
** SP30E and SP32E onlyELECTRiCAL CHARACTERiSTiCS
Min TYP
MAx
Unit
TEST ConDiTionS
TTL to RS-232; CL = 50pFRS-232 to TTL
CL = 0pF, RL = 3-7kΩ; TA= 25°CCL = 2500pF, RL = 3kΩ;
Measured from +3V to -3V or -3V to +3V
SP30E and SP32E onlySP30A and SP32A only
.5 0.
3.0.030
μsμsV/μsV/μsnsns
0 400 250
No Load, Vcc = 5V, TA= 25°CAll Transmitters RL = 3kΩ, Ta= 25°C
Vcc = 5V, Ta= 25°C
3 5
5mAmA
5μA
PERFoRMAnCE CURvES
-11-10-91210VCC = 6VVCC = 6VV– Voltage (Volts)-8-7-6-5-4-302468VCC = 5VVCC = 4VVCC = 5VV+ (Volts)1214642VCC = 4V8100Load Current (mA)0510152025303540Load Current (mA)302520VCC = 6V9.08.58.07.5ICC (mA)5VCC = 5V0VCC = 4V5VCC = 3V0-55-40025708525VOH (Volts)7.06.56.05.55.04.54.75Load current = 0mATA = 25CTemperature ( C)5.0VCC (Volts)5.255.5Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-7000 • www.exar.com SP202E,232E,233E, 30E, 32E_00_0608
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Pin ASSignMEnTS
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DETAiLED DESCRiPTion
The SP202E, SP232E, SP233E, SP30E and SP32A devices are a family of line driver and receiver pairs that meet the EIA/TIA-232 and V.28 serial communication protocols. The ESD tolerance has been improved on these devices to over +/-5kV for Human Body Model. These devices are pin-to-pin compatible with Exar's 232A, 233A, 30A and 32A as well as popular industry standards. This family of parts offer a 20kbps data rate, 0V/μs slew rate and an on-board charge pump that operates from a single 5V supply using 0.μF ceramic capacitors. The SP202E, 232E, 233E, 30E and 32E de-vices have internal charge pump voltage con-verters which allow them to operate from a sin-gle +5V supply. The charge pumps will operate with polarized or non-polarized capacitors rang-ing from 0. to 0µF and will generate the +/-6V needed to generate the RS-232 output levels.The SP233E design offers internal charge pump capacitors. The SP30E provides an ON/OFF input that simultaneously disables the internal charge pump circuit and puts all transmitter and receiver outputs into a high impedance state. The SP32E is identical to the SP30E but with seperate tri-state and shutdown inputs
Theory of operation
The SP202E, SP232E, SP233E, SP30E and SP32E devices are made up of three basic circuit blocks: 1. Drivers, 2. Receivers, and 3. charge pump. Each block is described below.Drivers
The drivers are inverting level transmitters that convert TTL or CMOS logic levels to EIA/TIA-232 levels with an inverted sense relative to the input logic levels. The typical driver output voltage swing is +/-6V. Even under worst case loading conditions of 3k ohms and 2500pF, the driver output is guaranteed to be +/-5.0V mini-mum, thus satisfying the RS-232 specification. The driver outputs are protected against infinite short-circuits to ground without degradation in reliability.
The slew rate of the driver output is internally limited to 30V/μs in order to meet the EIA stan-dards (EIA-232F). Additionally, the driver out-puts LOW to HIGH transition meets the mon-tonic output requirements of the standard.
Receivers
The receivers convert EIA/TIA-232 signal lev-els to inverted TTL or CMOS logic output lev-els. Since the input is usually from a transmis-sion line, where long cable length 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. The input thresholds are 0.8V minimum and 2.8V maximum, again well within the +/-3V RS-232 requirements. Should an input be left unconnected, an internal 5kohm pull-down resistor to ground will commit the output of the receiver to a HIGH state.In actual system applications, it is quite pos-sible for signals to be applied to receiver inputs before power is applied to the receiver circuitry. This occurs, for example, when a PC user at-tempts to print, only to realize that the printer wasn't turned on. In this case an RS-232 signal from the PC will appear on the receiver input at the printer. When the printer power is turned on, the receiver will operate normally. All of these devices are fully protected.
Charge pump
The charge pump is an Exar patented design and uses a unique approach compared to older less efficiant designs. The charge pump requires 4 external capacitors and uses a four phase voltage shifting technique. The internal power supply consists of a dual charge pump that provides a driver output voltage swing of +/-6V. The internal oscillator controls the four phases of the voltage shifting. A description of each phase follows:
Phase 1
Vss charge store and double: The positive ter-minals of capacitors C and C2 are charged from Vcc with their negative terminals initially connected to ground. C+ is then connected to ground and the stored charge from C- is superimposed onto C2-. Since C2+ is still con-nected to Vcc the voltage potential across C2 is now 2 x Vcc.
Phase 2
Vss transfer and invert: Phase two connects the negative terminal of C2 to the Vss storage capacitor and the positive terminal of C2 to ground. This transfers the doubled and invert-ed (V-) voltage onto C4. Meanwhile, capacitor
DESCRiPTionExar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-7000 • www.exar.com SP202E,232E,233E, 30E, 32E_00_0608
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C is charged from Vcc to prepare it for its next phase.
Phase 3
Vdd charge store and double: Phase three is identical to the first phase. The positive termi-nals of C and C2 are charged from Vcc with their negative terminals initially connected to ground. C+ is then connected to ground and the stored charge from C- 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 posi-tive terminal of C2 to the Vdd storage capacitor. This transfers the doubled (V+) voltage onto C3. Meanwhile, capacitor C is charged from Vcc to prepare it for its next phase.
The clock rate for the charge pump typically op-erates at greater than 5kHz allowing the pump to run efficiently with small 0.1uF capacitors. Ef-ficient operation depends on rapid charging and discharging of C and C2, therefore capacitors should be mounted as close as possible to the IC and have low ESR (equivalent series resis-tance). Inexpensive surface mount, ceramic ca-pacitors are ideal for using on charge pump. If polarized capacitors are used the positive and negative terminals should be connected as shown in the typical operating circuit. A diagram of the individual phases are shown in Figure .Shutdown (SD) and Enable (En) features for the SP310E and SP312E
Both the SP30E and SP32E have a shutdown / standby mode to conserve power in battery-powered applications. To activate the shutdown mode, which stops the operation of the charge pump, a logic \"0\" is applied to the appropriate control line. For the SP30E, this control line is the ON/OFF (pin 8) input. Activating the shut-down mode puts the SP30E transmitter and receiver ouptuts into a high impedance con-dition. For the SP32E, this control line is the SHUTDOWN (pin8) input; this also puts the transmitter outputs in a tri-state mode. The re-ceiver outputs can be tri-stated seperately dur-ing normal operation or shutdown by applying a logic \"\" on the EN line (pin ).Wake-Up Feature for the SP312E
The SP32E has a wake-up feature that keeps the receivers active when the device is placed into shutdown. Table 1 defines the truth table for the Wake-Up function. When only the receivers are activated, the SP32E typically draws less than 5uA supply current. In the case of when a modem is interfaced to a computer in power down mode, the Ring Indicator (RI) signal from the modem would be used to \"wake-up\" the computer, allowing it to accept data transmis-sion.
After the ring indicator has propagated
through the SP32E receiver, it can be used to trigger the power management circuitry of the computer to power up the microproces-sor, and bring the SD pin of the SP32E to a logic high, taking it out of the shutdown mode. The receiver propagation delay is typically us. The enable time for V+ and V- is typi-cally 2ms. After V+ and V- have settled to their final values, a signal can be sent back to the modem on the data terminal ready (DTR) pin signifying that the computer is ready to accept the transmit data.
DESCRiPTion
SD 0 0 EN 0 0 PowerReceiver Up/Downoutputs Down Down Up UpEnabledTri-state Enabled Tri-stateTable . Wake-up Function truth table
Pin Strapping for the SP233E
To operate properly, the following pairs of pins must be externally wired together as noted in table 2:Pins Wired TogetherTwo V- pinsTwo C2+ pinsTwo C- pins SOICW0 & 72 & 5 & 6Connect Pins 6 and 9 to GND Table 2. Pin Strapping table for SP233E
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-7000 • www.exar.com SP202E,232E,233E, 30E, 32E_00_0608
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+ V CC - DESCRiPTionPhase 2 – Vss transfer from C2 to C4. Meanwhile C 1 is charged to Vcc + + V CC - C Phases 1 and 3: Store/Double. Double charge from C 1 onto C2. C 2 is now charged to -2xVcc + e - 1 C + e - 2 V+ e - C + 3 C Vss 4 + C + 1 C + e - e - 2 V+ C 3 V- + Patented 5,306,954 + V CC - C 4 Phase 4 V DD transfer from C2 to C3. Meanwhile C1 is charged to Vcc V e + DD e + + C + e - 1 C + 2 V+ C 3 V- + C 4 Figure . Charge pump phasesESD ToLERAnCE
The SP202E, 232E, 233E, 30E and 32E devices incorporates ruggedized ESD cells on all driver outputs and receiver input pins. The ESD structure is improved over our previous family for more rugged applications and envi-ronments sensitive to electro-static discharges and associated transients. The improved ESD tolerance is at least +/-5kV Human Body Model without damage nor latch-up.
The Human Body Model has been the gener-ally accepted ESD testing method for semi-conductors. This method is also specified in MIL-STD-883, Method 305.7 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 intergrated circuit. The simulation is peformed by using a test model as shown in figure 2. This method will test the IC's capability to withstand an ESD transient during normal handling such as in manufacturing areas where the IC's tend to be handled frequently.
RCSW1DC Power SourceRSSW2CSDeviceUnderTestFigure 2. ESD test circuit for Human Body Model
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-7000 • www.exar.com SP202E,232E,233E, 30E, 32E_00_0608
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TYPiCAL PERFoRMAnCE CHARACTERiSTiCS
Figure 3, SP232E Charge pump waveforms- no load ( = C+, 2 = C2+, 3 = V+, 4 = V-).
Figure 6, Charge pump outputs at start up ( = Vcc, 2 = V+, 3 = V-).
Figure 4, SP232E Charge pump waveforms when fully loaded with 3Kohms ( = C+, 2 = C2+, 3 = V+, 4 = V-).
Figure 5, Loopback results at 60KHZ and 2500pF load ( = TXin, 2 = TXout/RXin, 3 = RXout).
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-7000 • www.exar.com SP202E,232E,233E, 30E, 32E_00_0608
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Figure 7, SP202E and SP232E Typical Application circuitFigure 9, SP233ECT Typical Application circuit
Figure 8, SP30E Typical Application circuit
9
Figure 0, SP32E Typical Application circuit
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-7000 • www.exar.com SP202E,232E,233E, 30E, 32E_00_0608
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-7000 • www.exar.com SP202E,232E,233E, 30E, 32E_00_0608
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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-7000 • www.exar.com SP202E,232E,233E, 30E, 32E_00_0608
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-7000 • www.exar.com SP202E,232E,233E, 30E, 32E_00_0608
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ORDERING INFORMATIONPart numberSP202ECN-LSP202ECN-L/TRSP202ECP-LSP202ECT-LSP202ECT-L/TRSP202EEN-LSP202EEN-L/TRSP202EEP-LSP202EET-LSP202EET-L/TRSP232ECN-LSP232ECN-L/TRSP232ECP-LSP232ECT-LSP232ECT-L/TRSP232EEN-LSP232EEN-L/TRSP232EEP-LSP232EET-LSP232EET-L/TRSP233ECT-LSP233ECT-L/TRSP233EET-LSP233EET-L/TRSP30ECP-LSP30ECT-LSP30ECT-L/TRSP30EEP-LSP30EET-LSP30EET-L/TRSP32ECT-LSP32ECT-L/TRSP32EET-LSP32EET-L/TR
Temperature range 00C to +700C00C to +700C00C to +700C00C to +700C 00C to +700C-400C to +850C-400C to +850C-400C to +850C-400C to +850C-400C to +850C00C to +700C00C to +700C00C to +700C00C to +700C00C to +700C-400C to +850C-400C to +850C-400C to +850C-400C to +850C-400C to +850C00C to +700C00C to +700C-400C to +850C-400C to +850C00C to +700C00C to +700C00C to +700C-400C to +850C-400C to +850C-400C to +850C00C to +700C00C to +700C-400C to +850C-400C to +850C
Package Type6 pin NSOIC6 pin NSOIC6 pin PDIP6 pin SOICW6 pin SOICW6 pin NSOIC6 pin NSOIC6 pin PDIP6 pin SOICW6 pin SOICW6 pin NSOIC6 pin NSOIC6 pin PDIP6 pin SOICW6 pin SOICW6 pin NSOIC6 pin NSOIC6 pin PDIP6 pin SOICW6 pin SOICW20 pin SOICW20 pin SOICW20 pin SOICW20 pin SOICW8 pin PDIP8 pin SOICW8 pin SOICW8 pin PDIP8 pin SOICW8 pin SOICW8 pin SOICW8 pin SOICW8 pin SOICW8 pin SOICW
All packages are available as lead free (RoHS compliant).
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-7000 • www.exar.com SP202E,232E,233E, 30E, 32E_00_0608
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REVISION HISTORY
Date7-9-04-06-08
Revision
A.0.0
Description
Original Sipex Data sheet
Generate new Datasheet using Exar format and change revision to .0.0. Remove IEC Air and Contact ESD ratings. Update ordering information to remove EOL part numbers. Up-date charge pump description to show regulated charge pump design.
Notice
EXAR Corporation reserves the right to make changes to any products contained in this publication in order to improve design, performance or reliabil-ity. 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 specific 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 significantly 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 2008 EXAR CorporationDatasheet November 2008
Send your Interface technical inquiry with technical details to: customersupport@exar.comReproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited.
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