SP3244EEA-L

SP3244E-SP3245E 3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus • Contains 3-Drivers and 5-Receivers; Single-chip DTE (PC or terminal) serial port transceiver • Auto On-line® Plus • SP3244E slew-controlled to 250Kbps under load • SP3245E 1Mbps data rate for high-speed RS-232 • Meets true EIA/TIA-232-F and ITU V.28 standards from a +3.0V to +5.5V power supply • Adheres to EIA/TIA-562 for interoperability with EIA/TIA-232 down to a +2.7V supply voltage • Regulated charge pump yields stable RS-232 outputs regardless of VCC variations • ESD Specifications: ±15KV Human Body Model ±15KV IEC1000-4-2 Air Discharge ± 8KV IEC1000-4-2 Contact Discharge FEATURES C2+ 1 C2- 2 V- 3 R1IN 4 28 C1+ 27 V+ 26 VCC 25 GND 24 C1R2IN 5 R3IN 6 SP3244E 23 ONLINE SP3245E 22 SHUTDOWN R4IN 7 21 STATUS R5IN 8 T1OUT 9 T2OUT 10 T3OUT 11 T3IN 12 T2IN 13 T1IN 14 20 R2OUT 19 R1OUT 18 R2OUT 17 R3OUT 16 R4OUT 15 R5OUT APPLICATIONS • Portable RS-232 • Laptops and handheld PCs and PDA • Cellular telephones, datacables, chargingcradles • Diagnostic/upload ports on embedded applications • Use in conjunction with low-voltage UART or microcontroller • SP3244E is cross-compatible with MAX3244E, ICL3244E • SP3245E is cross-compatible with MAX3245E, ICL3245E The SP3244E/3245E is a 3-driver/5-receiver device ideal for mobile phone, consumer and PDA applications. These devices use an internal high-efficiency, charge-pump power supply that requires only 0.1µF capacitors for 3.3V single-supply operation. This charge pump and Sipex’s driver architecture allow the SP3244E/3245E to deliver compliant RS-232 performance from a power supply ranging from +3.0V to +5.5V. At voltages between +2.7V and +3.0V the driver outputs are compliant with RS-562 and can interface to RS-232 in portable applications. The Auto On-line® Plus feature allows the device to automatically enter a low power shutdown mode if all receiver and driver inputs have been idle for 30 seconds. The device will “wake-up” from this automatic shutdown state upon detecting activity. This power saving feature functions without system intervention or modifications to software or drivers. SP3244E supports serial data rates of 250kbps minimum under full load and while maintaining slew rates of less than 30V/µs. SP3245E is capable of high speed communication of up to 1Mbps. Rev M 10/9/06 SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus © Copyright 2006 Sipex Corporation DESCRIPTION 1 PIN ASSIGNMENTS NAME C2+ C2VR1IN R2IN R3IN R4IN R5IN T1OUT T2OUT T3OUT T3IN T2IN T1IN R5OUT R4OUT R3OUT R2OUT R1OUT FUNCTION Positive terminal of the inverting charge pump capacitor. Negative terminal of the inverting charge pump capacitor. Regulated -5.5V output generated by the charge pump. RS-232 receiver input. RS-232 receiver input. RS-232 receiver input. RS-232 receiver input. RS-232 receiver input. RS-232 driver output. RS-232 driver output. RS-232 driver output. TTL/CMOS driver input. TTL/CMOS driver input. TTL/CMOS driver input. TTL/CMOS receiver output. TTL/CMOS receiver output. TTL/CMOS receiver output. TTL/CMOS receiver output. TTL/CMOS receiver output. Non-inverting receiver 2 output; active in shutdown. Status output. Forced SHUTDOWN input. Drive low to shut down drivers, receivers and charge pump. Will override Auto On-line® Plus. Do not leave this pin open. Auto On-line® input. Active low enabled automatic power saving feature. Equivalent to competitor's FORCEON pin. Do not leave this pin open. Negative terminal of the voltage doubler charge pump capacitor. Ground connection. Device power supply pin (3.0V to 5.5V). Regulated +5.5V output generated by the charge pump. Positive terminal of the voltage doubler charge pump capacitor. PIN NUMBER (T)SSOP 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 QFN 29 30 31 1 2 3 4 5 6 7 8 10 11 12 13 14 15 17 18 19 20 21 R2OUT STATUS SHUTDOWN ONLINE C1GND VCC V+ C1+ 23 24 25 26 27 28 22 23 24 26 27 28 Rev M 10/9/06 SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus © Copyright 2006 Sipex Corporation 2 ABSOLUTE MAXIMUM RATINGS Supply Voltage (Vcc).......................-0.3V to + 6.0V V+ (Note 1)......................................-0.3V to + 7.0V V- (Note 1).......................................+0.3V to - 7.0V |V+| + |V-| .......................................................+13V Input voltage at TTL input pin.. -0.3V toVCC +0.3V RxIN..............................................................+/-18V Driver output (from Ground)...................... +/-13.2V RxOUT, STATUS.....................-0.3V to VCC + 0.3V Short Circuit Duration, TxOUT to GND, Continuous (One output at a time maximum) Storage Temperature.....................-65°C to +150°C Operating Temperature SP324XECX................0°C to +70°C Operating Temperature SP324XEEX...........-40°C to +85°C Lead Temperature (soldering, 10s)..............+300°C SSOP-28, øJA = 67.1ºC/W TSSOP-28, øJA = 83.6ºC/W QFN- 32, øJA= 22.4ºC/W 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. NOTE 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V. Unless otherwise noted VCC = +3.0V to +5.5V, TAMB = TMIN to TMAX, C1–C4 = 0.1µF. Typical values are at TAMB = +25°C, VCC = 3.3V. PARAMETERS DC CHARACTERISTICS Supply Current, Auto On-Line® Plus Supply Current, Shutdown Supply Current, Active Driver Input and Logic Input Pins: High Low Logic Threshold Logic Input Leakage Current Logic Input Hysteresis VIH VIL VT IIL VHYS Vcc = 3.3V Vcc = 5.0V ICC3 ICC2 ICC1 Receivers idle, TxIN = Vcc or GND, ONLINE = GND, SHUTDOWN = Vcc Note 1 SHUTDOWN = GND ONLINE = SHUTDOWN = Vcc, No Load SYMB TEST CONDITIONS ELECTRICAL CHARACTERISTICS MIN. TYP. MAX. UNIT 1 1 1 10 10 5 µA µA mA 2 2.4 0.8 1.5 0.01 100 ±1.0 µA mV V Logic Input Voltage Receiver Outputs and STATUS Output Receiver Output Voltage Low Receiver Output Voltage High Receiver Output Leakage Current Note 1: Characterized, not 100% tested. VOL VOH IOZ IOUT = -1.6mA IOUT = 1mA Receivers disabled. 0.4V < VO < 5.5V VCC -0.6 ±0.02 ±1 0.4 V V µA Rev M 10/9/06 SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus © Copyright 2006 Sipex Corporation 3 Unless otherwise noted VCC = +3.0V to +5.5V, TAMB = TMIN to TMAX, C1–C4 = 0.1µF. Typical values are at TAMB = +25°C, VCC = 3.3V. PARAMETERS Receiver Inputs Input Voltage Range Input Threshold Low VCC = 3.3V VCC = 5.0V Input Threshold High VCC = 3.3V VCC = 5.0V Input Hysteresis Input Resistance Driver Outputs Output Voltage Swing VO All transmitter outputs loaded with 3kΩ to GND Output load = Open Circuit Short Circuit Current Power-Off Impedance Output Leakage Current Mouse Drivability Vout = 0V VCC = V+ = V- = 0, transmitter outputs = ±2V VCC = 0 or 3V to 3.3V, VOUT = ±12V, Drivers disabled T1IN = T2IN = GND, T3IN = VCC, T3 loaded with 3kΩ to GND, T1OUT and T2OUT loaded with 2.5mA each TA = 25ºC 3 SYMB TEST CONDITIONS ELECTRICAL CHARACTERISTICS MIN. TYP. MAX. UNIT -15 0.6 0.8 1.0 1.2 1.2 1.7 200 4.5 +15 V V 2.4 2.4 V V mV 7 kΩ ±5.0 ±5.6 ±15.0 ±60 V mA Ω 300 10M ±25 µA ±5.0 V ESD Protection IEC 1000-4-2 Air Discharge ESD Protection for RxIn, TxOut pins IEC 1000-4-2 Contact Discharge Human Body Model All Other Pins Human Body Model ±15 ±8 ±15 ±2 kV kV Auto On-line® Plus (ONLINE = GND, SHUTDOWN = Vcc) Rx Input Threshold to STATUS Output High Rx Input Threshold to STATUS Output Low Threshold to STATUS High Threshold to STATUS Low Rx or Tx Transition to Drivers Enabled Last Rx or Tx Transition to Drivers Disabled tSTH tSTL tONLINE tOFFLINE Note 1 ±0.3 0.4 30 100 15 30 60 ±2.7 V V µs µs µs sec Note 1: Characterized, not 100% tested. Rev M 10/9/06 SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus © Copyright 2006 Sipex Corporation 4 Unless otherwise noted VCC = +3.0V to +5.5V, TAMB = TMIN to TMAX, C1–C4 = 0.1µF. Typical values are at TAMB = +25°C, VCC = 3.3V. PARAMETERS SP3244E Maximum Data Rate Driver Propagation Delay Transition-Region Slew Rate tDPHL, tDPLH RL = 3kΩ, CL = 1000pF. One transmitter switching. CL=1000pF RL=3kΩ to 7kΩ, CL=150pF to 1000pF, measurements taken from +3V to -3V or from -3V to +3V. |tDPHL - tDPLH| at zero crossing tRPHL,tRPLH tRZH , tRZL tRZH , tRLZ |tPHL - tPLH| at 1.5V RIN to ROUT, CL = 150pF 250 1600 kbps ns SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT TIMING CHARACTERISTICS 4 30 V/µs Driver Skew Receiver Propagation Delay Receiver Output Enable Time Receiver Output Disable Time Receiver Skew SP3245E Maximum Data Rate 50 0.15 0.04 0.1 40 2.0 2.0 ns µs µs µs ns RL = 3kΩ, CL = 250pF. One transmitter switching. RL = 3kΩ, CL = 1000pF. One transmitter switching. 1000 500 700 24 100 0.15 0.05 0.1 2.0 2.0 150 kbps kbps ns V/µs ns µs µs µs ns Driver Propagation Delay Transition-Region Slew Rate tDPHL, tDPLH CL=250pF RL=3kΩ to 7kΩ, CL=150pF to 250pF, measurements taken from +3V to -3V or from -3V to +3V. |tDHPL - tDPLH| at zero crossing Driver Skew Receiver Propagation Delay Receiver Output Enable Time Receiver Output Disable Time Receiver Skew tRPHL,tRPLH tRZH , tRZL tRZH , tRLZ RIN to ROUT, CL = 150pF |tPHL - tPLH| at 1.5V 90 Rev M 10/9/06 SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus © Copyright 2006 Sipex Corporation 5 TYPICAL PERFORMANCE CHARACTERISTICS 400 3 Charge Pump Turn-on Time (µs) 350 2.5 TIN to ROUT Propagation Delay (µs) 300 2 250 1.5 200 Charge Pump Turn-on Time (us) 150 1 Tin to Rout Propagation Delay (us) 0.5 100 -55 -30 -5 20 Temperature (ºC) 45 70 95 0 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 Load Capacitiance (pF) Turn on Time vs. Temperature Transmitter Input to Receiver Output Propagation Delay vs. Load Capacitance 40 35 30 30 Transmitter Output Slew Rate (V/µs) 25 1Mbps Supply Current (mA) 25 20 15 Supply Current (mA) 10 5 0 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 Load Capacitiance (pF) 20 250kbps 15 10 5 Transmitter Output Slew Rate (V/us) 0 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 Load Capacitiance (pF) ICC vs. Load Capacitance Transmitter Output Slew Rate vs. Load Capacitance 400 6 5 350 V+ Transmitter Output Voltage (V) 4 3 2 0 -1 -2 -3 -4 Transmitter Output Voltage (V) -5 -6 0 500 1000 1500 1 300 250 3245, 1Mbps Skew (ns) 200 Skew (ns) 150 100 3244, 250kbps V- 50 2000 2500 3000 3500 4000 4500 5000 0 0 250 500 750 1000 1250 1500 1750 2000 2250 2500 2750 3000 3250 3500 Load Capacitiance (pF) Load Capacitance (pF) Transmitter Output vs. Load Capacitance Transmitter Skew vs. Load Capacitance Rev M 10/9/06 SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus © Copyright 2006 Sipex Corporation 6 TYPICAL PERFORMANCE CHARACTERISTICS SP3244E Charge Pump Levels Out of Shutdown SP3244E C2+ Charge Pump Waveforms - Vcc=3.3V, All channels switching SP3244E Charge Pump Levels Into Shutdown SP3244E C2+ Charge Pump Waveforms Vcc=5.0V, All channels switching SP3244E Charge Pump Waveforms for 250kbps Clock Rate Rev M 10/9/06 SP3244E Charge Pump Power On TimeVcc=3.3V, T=27C © Copyright 2006 Sipex Corporation SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus 7 TYPICAL PERFORMANCE CHARACTERISTICS SP3244E Charge Pump Power On Time - Vcc=3.3V, T=85ºC SP3244E Waveforms for 250kpbs Clock Rate RL=3kΩ CL=4700pF SP3244E Charge Pump Power On Time - Vcc=3.3V, T=-40C SP3245E Waveforms for 1Mbps Clock Rate RL=3kΩ CL=1000pF SP3244E Waveforms for 250kpbs Clock Rate RL=3kΩ CL=1000pF Rev M 10/9/06 SP3245E Waveforms for 1Mbps Clock Rate RL=3kΩ CL=50pF © Copyright 2006 Sipex Corporation SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus 8 TYPICAL PERFORMANCE CHARACTERISTICS SP2345 Waveforms for 1Mbps Clock Rate - RL=3k, CL=250pF Rev M 10/9/06 SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus © Copyright 2006 Sipex Corporation 9 The SP3244E and SP3245E are 3-driver/5-receiver devices ideal for serial ports in batterypowered, portable, or handheld applications such as notebook or handheld computers. SP3244E/3245E transceivers meet the EIA/ TIA-232 and ITU-T V.28/V.24 communication protocols for reliable serial communication. The SP3244E/3245E devices feature Sipex’s 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 SP3244E/3245E is an ideal choice for power sensitive designs. With the Auto On-line® Plus enabled the SP3244E/3245E reduces power consumption to a 1µA supply current whenever the transceivers are idle. In shutdown, the internal charge pump and the drivers will shut down. Receivers remain active unless the device is put into manual shutdown using the SHUTDOWN pin. This feature allows design engineers to address power saving concerns without major design changes. Theory Of Operation The SP3244E/3245E is made up of four basic circuit blocks: 1. Drivers, 2. Receivers, 3. the Sipex proprietary charge pump, and 4. Auto On-line® Plus circuitry. Drivers The drivers are inverting level transmitters that convert 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 outputs are protected against infinite short circuits to ground without degradation in reliability. These drivers comply with the EIA/TIA-232-F and all previous RS-232 versions. Unused driver inputs should be connected to GND or VCC. The SP3244E/3245E devices operate at this typical data rate when fully loaded. The drivers can guarantee output data rates fully loaded with 3KΩ in parallel with 1000pF (SP3244E), or 250pF (SP3245E) ensuring compatibility with popular PC-to-PC communication software. The slew rate of the driver output on the SP3244E is internally limited to a maximum of 30V/µs in order to meet the EIA standards Rev M 10/9/06 (EIA RS-232D 2.1.7, Paragraph 5). The slew rate of SP3245E is not limited to enable higher speed data transfers. The transition of the loaded output from HIGH to LOW also meets the monotonic signal transition requirements of the standard. Receivers The receivers convert EIA/TIA-232 signal levels to TTL or CMOS logic output levels. Receivers remain active unless the device is put into manual shutdown using the SHUTDOWN pin. The non-inverted output of Receiver 2 (R2OUT) will continue to be active in all modes, including shutdown. 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 500mV. This ensures that the receiver is virtually immune to noisy transmission lines. Should an input be left unconnected, an internal 5KΩ pulldown resistor to ground will commit the output of the receiver to a HIGH state. Highly Efficient Charge Pump The 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 3.0 or 5.5V power supply. The charge pumps use four external capacitors to hold and transfer electrical charge. The Sipex patented design (US Patent #5,306,954) uses a unique approach compared to older less efficient designs. The pumps use a four–phase voltage shifting technique to attain symmetrical V+ and V- power supplies. An intelligent control oscillator regulates the operation of the charge pump to maintain the proper voltages at maximum efficiency. 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. C1+ 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. DESCRIPTION SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus © Copyright 2006 Sipex Corporation 10 DESCRIPTION + V CC - Phase 2 – Vss transfer from C2 to C4. Meanwhile C1 is charged to Vcc + + V CC - C + 1 C + 2 V+ e- C + 3 Phases 1 and 3: Store/Double. Double charge from C1 onto C2. C2 is now charged to -2xVcc e- e- C Vss 4 + C + 1 C + 2 V+ V- C + 3 Patented 5,306,954 (Sipex, inc.) + V CC - ee- C 4 Phase 4 VDD transfer from C2 to C3. Meanwhile C1 is charged to Vcc V e+ DD e+ + C + 1 C + 2 V+ V- C + 3 e- C 4 Charge Pump Phases Minimum Recommended Charge Pump Capacitor Values Input Voltage VCC 3.0V to 3.6V 4.5V to 5.5V 3.0V to 5.5V Charge Pump Capacitor Value for SP32XX C1-C4=0.1µF C1=0.047µF, C2-C4=0.33µF C1-C4=0.22µF Charge Pump Capacitor Values Rev M 10/9/06 SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus © Copyright 2006 Sipex Corporation 11 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 inverted (V–) voltage onto C4. 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 first phase. The positive terminals of capacitors C1 and C2 are charged from VCC with their negative terminals initially connected to ground. C1+ 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 storage capacitor. This transfers the doubled (V+) voltage onto C3. Meanwhile, capacitor C1 charged from VCC to prepare it for its next phase. The Sipex chargepump 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 Vwill be smaller than V+ on these older designs. Under lightly loaded conditions the intelligent pump oscillator maximizes efficiency by running only as needed to maintain V+ and V–. Since interface transceivers often spend much of their time at idle this power-efficient innovation can greatly reduce total power consumption. This improvement is made possible by the independent phase sequence of the Sipex charge-pump design. The clock rate for the charge pump typically operates at greater than 70kHz allowing the pump to run efficiently with small 0.1µF capacitors. Efficient 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). Inexpensive Rev M 10/9/06 surface mount ceramic capacitors (such as are widely used for power-supply decoupling) are ideal for use on the charge pump. 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 on the Typical Operating Circuit. Capacitance values may be increased if operating at higher VCC or to provide greater stability as the capacitors age. See Charge Pump Capacitor Value table on page 11. Auto On-line® Plus Circuitry The SP3244E/3245E devices have the advanced Auto On-line® Plus feature that saves power by turning off the charge pumps and driver outputs when the transceiver inputs are idle for more than 30 seconds. RS-232 signals use both positive and negative voltages of greater than ±5V magnitude. Receivers have nominal 5kΩ impedance to ground. Even when idle, drivers will maintain output signal voltage creating a continuous current flow. In low power battery operated devices this constant current drain can decrease battery life significantly. Receiver DESCRIPTION 5kΩ Reciever er 5 kΩ C u r r ent Pat h GND Fig u re 0 R e c ei v 5kΩ Current path toto G round Auto On-line® Plus devices may be configured to emulate the behavior of devices with our earlier Auto On-line® feature. Auto On-line® Plus puts the device into a low power mode when driver and receiver inputs are idle and reawakes upon detecting signal transitions. Auto On-line® puts the device into a low power mode when receiver inputs are left floating and reawakes when receivers are driven greater than ±2.7V magnitude by incoming RS-232 signal. SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus © Copyright 2006 Sipex Corporation 12 Auto On-line® Plus provides greater power savings in typical operation because the transceiver will go into low power standby mode unless a communication link is in use. Signals such as CTS, RTS, DTR, DSR, or RI will typically change signal-state to establish handshaking before any actual data-communication takes place. Transitions on these handshake signals will wake up the Auto On-line® Plus transceiver to prepare it for sending data (tONLINE 100µs typical). Receivers remain active to detect incoming signals in Auto On-line® Plus standby mode. Receiver outputs may be disabled by entering manual shutdown by driving SHUTDOWN pin to logic 0. A special non-inverted receiver output R2OUT remains active in all modes, including SHUTDOWN pin at logic 0. In some applications if there is a significant delay (greater than tOFFLINE) between the handshaking transitions and the start of data communication the transceiver may enter Auto On-Line® Plus standby mode before data communication begins. The tOFFLINE interval is at least 15 seconds and no longer than 60 seconds. In applications where the transceiver needs to remain active anytime it is connected to live RS-232 signals, even if those signals remain idle for longer than tOFFLINE, then the STATUS output may be used to drive the ONLINE pin. The STATUS output pin functions the same in both Auto On-line® and Auto On-line® Plus devices. STATUS will output logic 1 if any of the receiver inputs are driven greater than ±2.7V magnitude by incoming RS-232 signals and drives logic 0 if receiver inputs are floating or driven to ground. Driving the ONLINE pin with the STATUS output disables Auto On-line® Plus (Forced On-Line) whenever RS-232 voltages are seen on any receiver inputs. If no RS-232 voltages are seen on the receiver inputs the Auto On-line® Plus transceiver will still activate its charge pump and driver outputs when the driver inputs are active. This allows the transceiver to signal a remote Auto On-Line® or Auto On-Line® Plus, on the other end of the data cable, to wake up. The STATUS output pin remains active in all Rev M 10/9/06 modes, including SHUTDOWN pin at logic 0. Connecting STATUS output to drive both ONLINE and SHUTDOWN will wake the transceiver if any receiver inputs are driven greater than ±2.7V magnitude and put the transceiver into Forced Shutdown mode if all receiver inputs are floating or driven to ground. DESCRIPTION ±15KV ESD PROTECTION ESD-protection structures are incorporated on all pins to protect against electrostatic discharges encountered during handling and assembly. The driver output and receiver inputs of the SP3244E/3245E have extra protection against static electricity. Sipex uses state-ofthe-art structures to protect these pins against ESD of ±15kV without damage. The ESD structures withstand high ESD in all states: normal operation, shutdown, and powered down. After an ESD event, the SP3244E/3245E keep working without latch-up or damage. ESD protection can be tested in various ways. The transmitter outputs and receiver inputs of the SP3244E/3245E are characterized for protection to the following limits: • ±15kV using the Human Body Model • ±8kV using the Contact Discharge method specified in IEC 1000-4-2 • ±15kV using the Air-Gap Discharge method specified in IEC 1000-4-2 SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus © Copyright 2006 Sipex Corporation 13 DESCRIPTION Auto On-Line® Plus Truth Table Operating mode Forced Shutdown Forced Online Auto On-line® Plus (Wake When Active) Auto On-line® Plus ONLINE X 1 0 0 STATUS STATUS STATUS STATUS STATUS SHUTDOWN 0 1 1 1 1 1 1 STATUS STATUS |RxIN| > ± 2.7 V X X X X yes no no yes no Idle inputs (RxIN & TxIN) X X active idle > 30s X active idle > 30s X X TxOUT high-Z active active high-Z active active high-Z active high-Z RxOUT high-Z active active active active active active active active R2OUT active active active active active active active active active (Off-Line When Idle) Auto On-line® Plus (Wake On Cable) Auto On-line® Plus (Wake When Active) Auto On-line® Plus (Off-Line When Idle) Auto On-line® (Wake On Cable) Auto On-line® (Auto Shutoff) ESD Test Conditions ESD performance depends on a variety of conditions. Contact Sipex for a reliability report that documents test setup, methodology and results. IEC 1000-4-2 The IEC 1000-4-2 standard covers ESD testing and performance of finished equipment. However, it does not specifically refer to integrated circuits. The SP3244E/3245E helps you design equipment to meet IEC 1000-4-2, without sacrificing boardspace and cost for external ESD-protection components. The major difference between tests done using the Human Body Model and IEC 1000-4-2 is a higher peak current in IEC 1000-4-2. Series resistance is lower in the IEC 1000-4-2 model. Hence, the ESD withstand voltage measured to IEC 1000-4-2 is generally lower than that measured using the Human Body Model. The air-gap test involves approaching the device with a charged probe. The contact discharge method connects the probe to the device before the probe is energized. Machine Model The machine model for ESD tests all pins using a 200pF storage capacitor and zero discharge resistance. The objective is to emulate the stress caused when I/O pins are contacted by handling equipment during test and assembly. ESD Table Device Pin Tested TxOUT RxIN TxIN, RxOUT, ONLINE, SHUTDOWN, STATUS Human Body Model ± 15kV ± 15kV IEC1000-4-2 Air discharge ± 15kV ± 15kV Contact discharge ± 8kV ± 8kV Level 4 4 ± 2kV ± 2kV ± 2kV 1 Rev M 10/9/06 SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus © Copyright 2006 Sipex Corporation 14 DESCRIPTION Valid RS232 Level: STATUS = 1 2.7V SHUTDOWN Indeterminate 0.3V -0.3V T_IN Edge Detect S Invalid Level: STATUS = 0 R_IN 30 second timer R IDLE Edge Detect SHUTDOWN Indeterminate -2.7V T_IN Edge ONLINE Detect S Valid RS232 Level: STATUS = 1 R_IN R Auto On-line® Plus Logic Edge 30 second timer IDLE Detect SHUTDOWN ONLINE IDLE Low-Power Shutdown Receiver Positive and Negative Threshold versus STATUS Output Signal ONLINE SHUTDOWN ONLINE IDLE Low-Power Shutdown STATUS Output Logic SHUTDOWN ONLINE Low-Power Shutdown IDLE Shutdown Logic Rev M 10/9/06 SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus © Copyright 2006 Sipex Corporation 15 AUTO ON-LINE® PLUS RECEIVER INPUTS INVALID } REGION TRANSMITTER INPUTS TRANSMITTER OUTPUTS STATUS Vcc t TSTL OUTPUT 0 Vcc OUTPUT 0 V+ Vcc 0 V- t STH t OFFLINE tONLINE t OFFLINE tONLINE Auto On-Line® Plus Timing Diagram tSTL (=30µs typ.) tSTH (=0.4µs typ.) tOFFLINE (=30s typ.) tONLINE (=100µs typ.) Rev M 10/9/06 SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus © Copyright 2006 Sipex Corporation 16 TYPICAL OPERATING CIRCUIT VCC C5 C1 + + 0.1µF 28 C1+ 0.1µF 24 C11 C2+ SP3244E/45E V- 3 0.1µF 2 C214 T1IN 13 T2IN 12 T3IN 20 R2OUT 19 R1OUT 18 R2OUT TTL/CMOS OUTPUTS 17 R3OUT 16 R4OUT 15 R5OUT VCC Online Control To µP Supervisor Circuit 26 VCC V+ 27 C3 + 0.1µF C2 + C4 T1OUT 9 T2OUT 10 T3OUT 11 R1IN 4 5KΩ R2IN 5 + 0.1µF TTL/CMOS INPUTS RS-232 OUTPUTS 5KΩ R3IN 6 5KΩ R4IN 7 5KΩ R5IN 8 5KΩ RS-232 INPUTS 22 SHUTDOWN 23 ONLINE 21 STATUS GND 25 Rev M 10/9/06 SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus © Copyright 2006 Sipex Corporation 17 PACKAGE PINOUT C2+ 1 C2- 2 V- 3 R1IN 4 28 C1+ 27 V+ 26 VCC 25 GND 24 C1R2IN 5 R3IN 6 SP3244E 23 ONLINE SP3245E 22 SHUTDOWN R4IN 7 21 STATUS R5IN 8 T1OUT 9 T2OUT 10 T3OUT 11 T3IN 12 T2IN 13 T1IN 14 C2+ C1+ C2NC V+ 20 R2OUT 19 R1OUT 18 R2OUT 17 R3OUT 16 R4OUT 15 R5OUT CC 31 30 29 28 27 26 V R1 R2 R3 R4 R5 T1 T2 T3 32 25 NC V- IN 1 24 GND C1ONLINE SHUTDOWN STATUS R2 R1 R2 IN 2 3 4 5 6 7 8 23 22 21 20 19 18 17 IN IN SP3244/SP3245 QFN-32 TOP VIEW IN OUT OUT OUT OUT OUT OUT 10 11 12 OUT 13 OUT 14 NC OUT IN IN IN 15 R5 T3 T2 T1 R4 Rev M 10/9/06 SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus R3 NC 16 9 © Copyright 2006 Sipex Corporation 18 28 PIN TSSOP Rev M 10/9/06 SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus © Copyright 2006 Sipex Corporation 19 28 PIN SSOP Rev M 10/9/06 SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus © Copyright 2006 Sipex Corporation 20 32 PIN QFN Rev M 10/9/06 SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus © Copyright 2006 Sipex Corporation 21 ORDERING INFORMATION Part number SP3244ECA-L SP3244ECY-L SP3244EEA-L SP3244EEY-L SP3244EER1-L SP3245ECA-L SP3245ECY-L SP3245EEA-L SP3245EEY-L SP3245EER1-L Available in lead free packaging. Available in Tape and Reel. To order add "/TR" suffix to part number, Example: SP3244ECA-L= Standard: SP3244ECA-L/TR =Tape and Reel Temperature range From 0º to +70ºC From 0º to +70ºC From -40º to +85ºC From -40º to +85ºC From -40º to +85ºC From 0º to +70ºC From 0º to +70ºC From -40º to +85ºC From -40º to +85ºC From -40º to +85ºC Package Type 28 pin SSOP 28 pin TSSOP 28 pin SSOP 28 pin TSSOP 32 pin QFN 28 pin SSOP 28 pin TSSOP 28 pin SSOP 28 pin TSSOP 32 pin QFN Sipex Corporation Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 Solved by Sipex TM Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. Rev M 10/9/06 SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus © Copyright 2006 Sipex Corporation 22