SP3221ECA-L/TR

SP3221E Intelligent +3.0V to +5.5V RS-232 Transceiver FEATURES • Meets true EIA/TIA-232-F Standards from a +3.0V to +5.5V power supply • Interoperable with EIA/TIA-232 and adheres to EIA/TIA-562 down to a +2.7V power source • AUTO ON-LINE® circuitry automatically wakes up from a 1µA typical shutdown • Minimum 250kbps data rate under load • Regulated charge pump yields stable RS-232 outputs regardless of VCC variations • ESD specifications: +15KV Human Body Model +15KV IEC61000-4-2 Air Discharge +8KV IEC61000-4-2 Contact Discharge EN 16 SHDN 1 C1+ 2 15 VCC V+ 3 C1- 4 14 GND SP3221E C2+ 5 13 T1OUT 12 ONLINE C2- 6 11 T1IN V- 7 10 R1IN 8 9 STATUS R1OUT DESCRIPTION The SP3221E is an RS-232 transceiver solution intended for portable applications such as notebook and hand held computers. This device uses an internal high-efficiency, charge-pump power supply that requires only 0.1µF capacitors in 3.3V operation. This charge pump and Exar's driver architecture allow the SP3221E to deliver compliant RS-232 performance from a single power supply ranging from +3.0V to +5.5V. The SP3221E is a 1-driver/1-receiver device ideal for laptop/notebook computer and PDA applications. The SP3221E is offered in 16 pin TSSOP and SSOP packages. The AUTO ON-LINE® feature allows the device to automatically "wake-up" during a shutdown state when an RS-232 cable is connected and a connected peripheral is turned on. Otherwise, the device automatically shuts itself down drawing less than 1µA. SELECTION TABLE Device Power Supplies RS- 232 Drivers RS-232 Receivers AUTO ON-LINE ® TTL 3-state Data Rate (kbps) SP3221E +3.0V to +5.5V 1 1 YES YES 250 SP3221E_201_031920 1 ABSOLUTE MAXIMUM RATINGS Output Voltages TxOUT.............................................................+13.2V RxOUT, STATUS.......................-0.3V to (VCC + 0.3V) Short-Circuit Duration TxOUT.....................................................Continuous Storage Temperature......................-65°C to +150°C These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability and cause permanent damage to the device. VCC.......................................................-0.3V to +6.0V V+ (NOTE 1).......................................-0.3V to +7.0V V- (NOTE 1)........................................+0.3V to -7.0V V+ + |V-| (NOTE 1)...........................................+13V ICC (DC VCC or GND current).........................+100mA Input Voltages TxIN, ONLINE, SHUTDOWN, EN......................-0.3V to VCC + 0.3V RxIN...................................................................+15V Power Dissipation per package 16-pin TSSOP Theta-JA.................................................100.4°C/W Theta-JC.................................................19°C/W 16-pin SSOP Theta-JA.................................................87°C/W Theta-JC.................................................26°C/W NOTE 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V. ELECTRICAL CHARACTERISTICS Unless otherwise noted, the following specifications apply for VCC = +3.0V to +5.5V with TAMB = TMIN to TMAX. Typical values apply at VCC = +3.3V or +5.0V and TAMB = 25°C (Note 2). PARAMETER MIN. TYP. MAX. UNITS CONDITIONS Supply Current, AUTO ON-LINE® 1.0 10 µA RxIN open, ONLINE = GND, SHUTDOWN = Vcc, TxIN = Vcc or GND, Vcc = +3.3V, TAMB = +25ºC Supply Current, Shutdown 1.0 10 µA SHUTDOWN = GND, TxIN = Vcc or GND, Vcc = +3.3V, TAMB = +25ºC Supply Current, AUTO ON-LINE® Disabled 0.3 1.0 mA ONLINE = SHUTDOWN = Vcc, No Load, Vcc = +3.3V, TAMB = +25ºC 0.8 V DC CHARACTERISTICS LOGIC INPUTS AND RECEIVER OUTPUT Input Logic Threshold LOW HIGH 2.0 Vcc = 3.3V or 5.0V, TxIN, EN, SHUTDOWN, ONLINE Input Leakage Current +/-0.01 +/-1.0 µA TxIN, EN, ONLINE, SHUTDOWN, TAMB = +25ºC, Vin = 0V to Vcc Output Leakage Current +/-0.05 +/-10 µA Receiver disabled, Vout = 0V to Vcc 0.4 V IOUT = 1.6mA V IOUT = -1.0mA Output Voltage LOW Output Voltage HIGH Vcc - 0.6 Vcc - 0.1 NOTE 2: C1 - C4 = 0.1µF, tested at 3.3V ±10%. C1 = 0.047µF, C2-C4 = 0.33µF, tested at 5V±10%. SP3221E_201_031920 2 ELECTRICAL CHARACTERISTICS Unless otherwise noted, the following specifications apply for VCC = +3.0V to +5.5V with TAMB = TMIN to TMAX. Typical values apply at VCC = +3.3V or +5.0V and TAMB = 25°C (Note 2). PARAMETER MIN. TYP. +/-5.0 +/-5.4 MAX. UNITS CONDITIONS DRIVER OUTPUT Output Voltage Swing Output Resistance 300 V Driver output loaded with 3kΩ to GND, TAMB = +25ºC Ω Vcc = V+ = V- = 0V, Vout = +/-2V Output Short-Circuit Current +/-60 mA Vout = 0V Output Leakage Current +/-25 µA Vcc = 0V or 3.0V to 5.5V, Vout = +/-12V, Driver disabled +15 V RECEIVER INPUT Input Voltage Range -15 Input Threshold LOW 0.6 Input Threshold LOW 0.8 1.2 Vcc = 3.3V V Vcc = 5.0V Input Threshold HIGH 1.5 2.4 V Vcc = 3.3V Input Threshold HIGH 1.8 2.4 V Vcc = 5.0V Input Hysteresis 0.3 Input Resistance 3 1.5 V V 5 7 kΩ AUTO ON-LINE® CIRCUITRY CHARACTERISTICS (ONLINE = GND, SHUTDOWN = Vcc) STATUS Output Voltage LOW STATUS Output Voltage HIGH 0.4 Vcc - 0.6 V IOUT = 1.6mA V IOUT = -1.0mA Receiver Threshold to Driver Enabled (tONLINE) 100 µs Figure 13 Receiver Positive or Negative Threshold to STATUS HIGH (tSTSH) 0.5 µs Figure 13 Receiver Positive or Negative Threshold to STATUS LOW (tSTSL) 20 µs Figure 13 NOTE 2: C1 - C4 = 0.1µF, tested at 3.3V ±10%. C1 = 0.047µF, C2-C4 = 0.33µF, tested at 5V±10%. SP3221E_201_031920 3 TIMING CHARACTERISTICS Unless otherwise noted, the following specifications apply for VCC = +3.0V to +5.5V with TAMB = TMIN to TMAX. Typical values apply at VCC = +3.3V or +5.0V and TAMB = 25°C. PARAMETER MIN. TYP. MAX. UNITS CONDITIONS AC CHARACTERISTICS Data Rate 250 kbps RL = 3kΩ, CL = 1000pF, Receiver Propagation Delay tPHL and tPLH 0.15 µs Receiver input to Receiver output, CL = 150pF Receiver Output Enable Time 200 ns Normal Operation Receiver Output Disable Time 200 ns Normal Operation Driver Skew 350 800 ns │tPHL - tPLH│, RL = 3kΩ, CL = 1000pF Receiver Skew 50 800 ns │tPHL - tPLH│, CL = 150pF 30 V/µs Transition-Region Slew Rate 6 Vcc = 3.3V, RL = 3kΩ, CL = 150pF to 1000pF, TAMB = 25°C, measurements taken from -3.0V to +3.0V or +3.0V to -3.0V SP3221E_201_031920 4 TYPICAL OPERATING CIRCUIT Figure 1. SP3221E Typical Operating Circuit SP3221E_201_031920 5 TYPICAL PERFORMANCE CHARACTERISTICS Unless otherwise noted, the following performance characteristics apply for VCC = +3.3V, 250Kbps data rate, driver loaded with 3kΩ, 0.1µF charge pump capacitors, and TAMB = +25°C. 14 6 12 4 10 2 Ic c (m A ) 8 V out 6 4 0 -2 2 0 Txout+ 2.7 3.2 3.7 4.2 4.7 -4 5.2 -6 V c c (V ) 2.7 3.2 3.7 4.2 4.7 5.2 TxoutVcc Figure 3. Transmitter Output Voltage VS. Supply Voltage Figure 2. Supply Current VS. Supply Voltage 12 10 mA 8 6 4 2 0 0 100 200 300 kb p s Figure 4. Supply Current VS.Data Rate SP3221E_201_031920 6 PIN DESCRIPTION Name Function Pin # EN Receiver Enable, apply logic LOW for normal operation. Apply logic HIGH to disable receiver output (high-Z state). 1 C1+ Positive terminal of the voltage doubler charge-pump capacitor 2 V+ Regulated +5.5V output generated by charge pump 3 C1- Negative terminal of the voltage doubler charge-pump capacitor 4 C2+ Positive terminal of the inverting charge-pump capacitor 5 C2- Negative terminal of the inverting charge-pump capacitor 6 Regulated -5.5V output generated by charge pump 7 RS-232 receiver input 8 VR1IN R1OUT TTL/CMOS receiver output 9 TTL/CMOS output indicating receiver signal activity 10 TTL/CMOS driver input 11 Apply logic HIGH to override AUTO ON-LINE ® circuitry keeping driver active (SHUTDOWN must also be logic HIGH, refer to table 2) 12 RS-232 driver output 13 GND Ground 14 Vcc +3.0V to +5.5V supply voltage 15 Apply logic LOW to shut down drivers and charge pump. This overrides all AUTO ON-LINE ® circuitry and ONLINE (refer to table 2). 16 STATUS T1IN ONLINE T1OUT SHUTDOWN SP3221E_201_031920 7 DESCRIPTION THEORY OF OPERATION The SP3221E is a 1-driver/1-receiver device ideal for portable or handheld applications. The SP3221E transceiver meets the EIA/ TIA-232 and ITU-T V.28/V.24 communication protocols and can be implemented in batterypowered, portable, or handheld applications such as notebook or handheld computers. The SP3221E device features the Exar proprietary and patented (U.S.‑‑ 5,306,954) on-board charge pump circuitry that generates ±5.5V RS-232 voltage levels from a single +3.0V to +5.5V power supply. The SP3221E is made up of four basic circuit blocks: 1. Driver, 2. Receiver, 3. The Exar proprietary charge pump, and 4. AUTO ON-LINE® circuitry. Driver The driver is an inverting level transmitter that converts TTL or CMOS logic levels to 5.0V EIA/TIA-232 levels with an inverted sense relative to the input logic levels. Typically, the RS-232 output voltage swing is +5.4V with no load and +5V minimum fully loaded. The driver output is protected against infinite short-circuits to ground without degradation in reliability. This driver will comply with the EIA-TIA-232F and all previous RS-232 versions. Unused driver inputs should be connected to GND or VCC. This device is an ideal choice for power sensitive designs. Featuring AUTO ON-LINE® circuitry, the SP3221E reduces the power supply drain to a 1µA supply current. In many portable or handheld applications, an RS-232 cable can be disconnected or a connected peripheral can be turned off. Under these conditions, the internal charge pump and the drivers will be shut down. Otherwise, the system automatically comes online. This feature allows design engineers to address power saving concerns without major design changes. The driver can guarantee an output data rate of 250kbps while being fully loaded with 3kΩ in parallel with 1000pF, ensuring compatibility with PC-to-PC communication software. The slew rate of the driver output is internally limited to a maximum of 30V/µs in order to meet the EIA standards (EIA RS-232D 2.1.7, Paragraph 5). The transition of the loaded output from HIGH to LOW also meets the monotonicity requirements of the standard. VCC C5 C1 C2 + + + 2 C1+ 0.1µF 0.1µF TTL/CMOS OUTPUT V+ SP3221E C3 C4 T1OUT 13 11 T1IN R1IN 9 R1OUT 1 16 12 + 0.1µF V- 7 6 C2- 5KΩ VCC 3 4 C15 C2+ TTL/CMOS INPUT UART or Serial µC 15 VCC 0.1µF 8 + 0.1µF Figure 6 shows a loopback test circuit used to test the RS-232 Driver. Figure 8 shows the test results where the driver was active at 250kbps and loaded with an RS-232 receiver in parallel with a 1000pF capacitor. RS-232 data transmission rate of 250kbps provides compatibility with designs in personal computer peripherals and LAN applications. RS-232 OUTPUT RS-232 INPUT EN SHUTDOWN ONLINE 10 STATUS GND 14 RESET µP Supervisor IC VIN Figure 5. Interface Circuitry Controlled by Microprocessor Supervisory Circuit SP3221E_201_031920 8 Receiver The receiver converts ±5.0V EIA/TIA-232 levels to TTL or CMOS logic output levels. The receiver has an inverting output that can be disabled by using the EN pin. The receiver is active when the AUTO ONLINE® circuitry is enabled or when in shutdown. During the shutdown, the receiver will continue to be active. If there is no activity present at the receiver for a period longer than 20µs or when SHUTDOWN is enabled, the device goes into a standby mode where the circuit draws 1µA. Driving EN to a logic HIGH forces the output of the receiver into high-impedance. The truth table logic of the SP3221E driver and receiver outputs can be found in Table 2. Since receiver 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 300mV. This ensures that the receiver is virtually immune to noisy transmission lines. Should an input be left unconnected, an internal 5kΩ pull-down resistor to ground will commit the output of the receiver to a HIGH state. Figure 6. Loopback Test Circuit for RS-232 Driver Data Transmission Rates Figure 7. Loopback Test Circuit result at 250Kbps (Driver Fully Loaded) Device: SP3221E SHUTDOWN EN TXOUT RXOUT 0 0 High Z Active 0 1 High Z High Z 1 0 Active Active 1 1 Active High Z Table 2. SHUTDOWN and EN Truth Tables Note: In AUTO ON-LINE® Mode where ONLINE = GND and SHUTDOWN = VCC, the device will shut down if there is no activity present at the Receiver inputs. SP3221E_201_031920 9 Charge Pump Phase 3 — VDD charge storage — The third phase of the clock is identical to the first phase — the charge transferred in C1 produces –VCC in the negative terminal of C1, which is applied to the negative side of capacitor C2. Since C2+ is at VCC, the voltage potential across C2 is 2 times VCC. The charge pump uses a unique approach compared to older less–efficient designs. The charge pump still requires four external capacitors, but uses a four–phase voltage shifting technique to attain symmetrical 5.5V power supplies. The internal power supply consists of a regulated dual charge pump that provides output voltages of +/-5.5V regardless of input voltage (VCC) over the +3.0V to +5.5V range. This is important to maintain compliant RS232 levels regardless of power supply fluctuations. Phase 4 — VDD transfer — The fourth phase of the clock connects the negative terminal of C2 to GND, and transfers this positive generated voltage across C2 to C4, the VDD storage capacitor. This voltage is regulated to +5.5V. At this voltage, the internal oscillator is disabled. Simultaneous with the transfer of the voltage to C4, the positive side of capacitor C1 is switched to VCC and the negative side is switched to GND, allowing the charge pump cycle to begin again. The charge pump cycle will continue as long as the operational conditions for the internal oscillator are present. The charge pump operates in a discontinuous mode using an internal oscillator. If the output voltages are less than a magnitude of 5.5V, the charge pump is enabled. If the output voltages exceed a magnitude of 5.5V, the charge pump is disabled. This oscillator controls the four phases of the voltage shifting. A description of each phase follows. Since both V+ and V– are separately generated from VCC, in a no–load condition V+ and V– will be symmetrical. Older charge pump approaches that generate V– from V+ will show a decrease in the magnitude of V– compared to V+ due to the inherent inefficiencies in the design. Phase 1 — VSS charge storage — During this phase of the clock cycle, the positive side of capacitors C1 and C2 are initially charged to VCC. Cl+ is then switched to GND and the charge in C1– is transferred to C2–. Since C2+ is connected to VCC, the voltage potential across capacitor C2 is now 2 times VCC. Phase 2 — VSS transfer — Phase two of the clock connects the negative terminal of C2 to the VSS storage capacitor and the positive terminal of C2 to GND. This transfers a negative generated voltage to C3. This generated voltage is regulated to a minimum voltage of -5.5V. Simultaneous with the transfer of the voltage to C3, the positive side of capacitor C1 is switched to VCC and the negative side is connected to GND. SP3221E_201_031920 10 VCC = +5V C4 +5V + C1 C2 – –5V + – + – – + VDD Storage Capacitor VSS Storage Capacitor C3 –5V Figure 8. Charge Pump - Phase 1 VCC = +5V C4 C1 + C2 – + – + – – + VDD Storage Capacitor VSS Storage Capacitor C3 –10V Figure 9. Charge Pump - Phase 2 [ T ] +6V a) C2+ T 1 2 0V 2 0V b) C2- T Ch1 2.00V Ch2 2.00V M 1.00ms Ch1 1.96V -6V Figure 10. Charge Pump Waveforms VCC = +5V C4 +5V C1 + – C2 –5V + + – – + – VDD Storage Capacitor VSS Storage Capacitor C3 –5V Figure 11. Charge Pump - Phase 3 VCC = +5V +10V C1 + – C2 C4 + + – – – + VDD Storage Capacitor VSS Storage Capacitor C3 Figure 12. Charge Pump - Phase 4 SP3221E_201_031920 11 Charge Pump Capacitor selection The Exar charge pump is designed to operate reliably with a range of low cost capacitors.Either polarized or non polarized capacitors may be used. If polarized capacitors are used they should be oriented as shown in the Typical Operating Circuit. The V+ capacitor may be connected to either ground or Vcc (polarity reversed.) on the transmitter outputs and may slightly reduce power consumption. C2, C3, and C4 can be increased without changing C1’s value For best charge pump efficiency locate the charge pump and bypass capacitors as close as possible to the IC. Surface mount capacitors are best for this purpose. Using capacitors with lower equivalent series resistance (ESR) and self-inductance, along with minimizing parasitic PCB trace inductance will optimize charge pump operation. Designers are also advised to consider that capacitor values may shift over time and operating temperature. The charge pump operates with 0.1µF capacitors for 3.3V operation. For other supply voltages, see the table for required capacitor values. Do not use values smaller than those listed. Increasing the capacitor values (e.g., by doubling in value) reduces ripple Minimum recommended charge pump capacitor value Input Voltage VCC Charge pump capacitor value 3.0V to 3.6V C1 - C4 = 0.1µF 4.5V to 5.5V C1 = 0.047µF, C2-C4 = 0.33µF 3.0V to 5.5V C1 - C4 = 0.22µF Table 4. Capacitor selection table SP3221E_201_031920 12 The second stage of the AUTO ON-LINE® circuitry, shown in Figure 15, processes the receiver's RXINACT signal with an accumulated delay that disables the device to a 1µA typical supply current. The STATUS pin goes to a logic LOW when the cable is disconnected. The typical accumulated delay is around 20µs. When the SP3221E driver and internal charge pump are disabled, the supply current is reduced to 1µA typical. This can commonly occur in handheld or portable applications where the RS-232 cable is disconnected or the RS-232 driver of the connected peripheral are truned off. AUTO ON-LINE Circuitry ® The SP3221E device has AUTO ON-LINE® circuitry on board that saves power in applications such as laptop computers, PDA's, and other portable systems. The SP3221E device incorporates an AUTO ON-LINE® circuit that automatically enables itself when the external transmitter is enabled and the cable is connected. Conversely, the AUTO ON-LINE® circuit also disables most of the internal circuitry when the device is not being used and goes into a standby mode where the device typically draws 1µA. This function is externally controlled by the ONLINE pin. When this pin is tied to a logic LOW, the AUTO ON-LINE® function is active. Once active, the device is enabled until there is no activity on the receiver input. The receiver input typically sees at least ±3V, which are generated from the transmitter at the other end of the cable with a ±5V minimum. When the external transmitter is disabled or the cable is disconnected, the receiver input will be pulled down by its internal 5kΩ resistor to ground. When this occurs over a period of time, the internal transmitter will be disabled and the device goes into a shutdown or standby mode. When the ONLINE pin is HIGH, the AUTO ON-LINE® mode is disabled. The AUTO ON-LINE® mode can be disabled by the SHUTDOWN pin. If this pin is a logic LOW, the AUTO ON-LINE® function will not operate regardless of the logic state of the ONLINE pin. Table 3 summarizes the logic of the AUTO ON-LINE® operating modes. The truth table logic of the SP3221E driver and receiver outputs can be found in Table 2. When the SP3221E device is shutdown, the charge pumps are turned off. V+ charge pump output decays to VCC,the V- output decays to GND. The decay time will depend on the size of capacitors used for the charge pump. Once in shutdown, the time required to exit the shut down state and have valid V+ and V- levels is typically 200µs. For easy programming, the STATUS can be used to indicate DTR or a Ring Indicator signal. Tying ONLINE and SHUTDOWN together will bypass the AUTO ON-LINE® circuitry so this connection acts like a shutdown input pin The AUTO ON-LINE ® circuit has two stages: 1) Inactive Detection 2) Accumulated Delay The first stage, shown in Figure 14, detects an inactive input. A logic HIGH is asserted on RXINACT if the cable is disconnected or the external transmitters are disabled. Otherwise, RXINACT will be at a logic LOW. SP3221E_201_031920 13 RS-232 SIGNAL AT RECEIVER INPUT SHUTDOWN ONLINE STATUS TRANSCEIVER STATUS YES HIGH LOW HIGH Normal Operation (AUTO ON-LINE©) YES HIGH HIGH HIGH Normal Operation NO HIGH HIGH LOW Normal Operation NO HIGH LOW LOW Shutdown (AUTO ON-LINE©) YES LOW HIGH/LOW HIGH Shutdown NO LOW HIGH/LOW LOW Shutdown Table 3. AUTO ON-LINE® Logic S H U T RECEIVER +2.7V 0V RS-232 INPUT VOLTAGES -2.7V D O W N VCC STATUS 0V tSTSL tSTSH tONLINE DRIVER RS-232 OUTPUT VOLTAGES +5V 0V -5V Figure 13. AUTO ON-LINE® Timing Waveforms Inactive Detection Block RXIN RS-232 Receiver Block RX INACT RXOUT Figure 14. Stage I of AUTO ON-LINE® Circuitry SP3221E_201_031920 14 ESD TOLERANCE The SP3221E device incorporates ruggedized ESD cells on the driver output and receiver input pins. The ESD structure is improved over our previous family 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. 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 IEC61000-4-2 is shown on Figure 16. There are two methods within IEC61000-4-2, 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 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. There are different methods of ESD testing applied: a) MIL-STD-883, Method 3015.7 b) IEC61000-4-2 Air-Discharge c) IEC61000-4-2 Direct Contact The Human Body Model has been the generally accepted ESD testing method for semiconductors. 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 15. 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. 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 IEC61000-4-2 is that the system is required to withstand an amount of static electricity when Figure15. ESD Test Circuit for Human Body Model SP3221E_201_031920 15 Figure 16. ESD Test Circuit for IEC61000-4-2 i→ The circuit model in Figures 15 and 16 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. 30A 15A 0A For the Human Body Model, the current limiting resistor (RS) and the source capacitor (CS) are 1.5kΩ an 100pF, respectively. For IEC-61000-4-2, the current limiting resistor (RS) and the source capacitor (CS) are 330Ω an 150pF, respectively. t=0ns t→ t=30ns Figure 17. ESD Test Waveform for IEC61000-4-2 The higher CS value and lower RS value in the IEC-61000-4-2 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. DEVICE PIN TESTED Driver Output Receiver Input HUMAN BODY MODEL Air Discharge ±15kV ±15kV ±15kV ±15kV IEC61000-4-2 Direct Contact ±8kV ±8kV Level 4 4 Table 5. Transceiver ESD Tolerance Levels SP3221E_201_031920 16 PACKAGE: 16 Pin TSSOP     SP3221E_201_031920 17 PACKAGE: 16 Pin SSOP    SP3221E_201_031920 18 ORDERING INFORMATION(1) Part Number Temperature Range Package Packaging Method Lead-Free(2) SP3221EEA-L/TR -40°C to +85°C 16-pin SSOP Tape and Reel Yes SP3221EEY-L/TR -40°C to +85°C 16-pin TSSOP Tape and Reel Yes NOTES: 1. Refer to www.maxlinear.com/SP3221E for most up-to-date Ordering Information. 2. Visit www.maxlinear.com for additional information on Environmental Rating. SP3221E_201_031920 19 REVISION HISTORY DATE REVISION DESCRIPTION Nov 2012 1.0.0 Production release Dec 2012 1.0.1 Remove reference to SSOP package Sept 2014 1.0.2 Add SSOP package option, update package thermal information ECN 1414-04 Oct 2014 Aug 2016 2.0.0 Update Auto On-Line Circuitry section and Logic table Mar 2020 2.0.1 Update to MaxLinear logo. Update Ordering Information. MaxLinear, Inc. 5966 La Place Court, Suite 100 Carlsbad, CA 92008 760.692.0711 p. 760.444.8598 f. www.maxlinear.com The content of this document is furnished for informational use only, is subject to change without notice, and should not be construed as a commitment by MaxLinear, Inc. MaxLinear, Inc. assumes no responsibility or liability for any errors or inaccuracies that may appear in the informational content contained in this guide. Complying with all applicable copyright laws is the responsibility of the user. Without limiting the rights under copyright, no part of this document may be reproduced into, stored in, or introduced into a retrieval system, or transmitted in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise), or for any purpose, without the express written permission of MaxLinear, Inc. Maxlinear, Inc. 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 MaxLinear, Inc. receives, in writing, 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 MaxLinear, Inc. is adequately protected under the circumstances. MaxLinear, Inc. may have patents, patent applications, trademarks, copyrights, or other intellectual property rights covering subject matter in this document. Except as expressly provided in any written license agreement from MaxLinear, Inc., the furnishing of this document does not give you any license to these patents, trademarks, copyrights, or other intellectual property. MaxLinear, the MaxLinear logo, and any MaxLinear trademarks, MxL, Full-Spectrum Capture, FSC, G.now, AirPHY and the MaxLinear logo are all on the products sold, are all trademarks of MaxLinear, Inc. or one of MaxLinear’s subsidiaries in the U.S.A. and other countries. All rights reserved. Other company trademarks and product names appearing herein are the property of their respective owners. © 2012 - 2020 MaxLinear, Inc. All rights reserved. SP3221E_201_031920 20