SP3223EEA

Solved by ® SP3223E/EB/EU SP3223E/EB/EU TM Intelligent +3.0V to +5.5V Intelligent +3.0V to +5.5V RS-232 Transceivers RS-232 Transceivers 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 µA shutdown ■ Minimum 250Kbps data rate under load (EB) ■  Mbps data rate for high speed RS-232 (EU) ■ Regulated Charge Pump Yields Stable RS-232 Outputs Regardless of VCC Variations ■ ESD Specifications: +5KV Human Body Model +5KV IEC000-4-2 Air Discharge +8KV IEC000-4-2 Contact Discharge EN 1 20 SHUTDOWN 19 VCC 18 GND 17 SP3223 16 T1OUT R1IN C1+ 2 V+ C1C2+ C2VT2OUT R2IN 3 4 5 6 7 8 9 15 R1OUT 14 ONLINE 13 T1IN 12 T2IN 11 STATUS R2OUT 10 Now Available in Lead Free Packaging DESCRIPTION The SP3223 products are RS-232 transceiver solutions intended for portable applications such as notebook and hand held computers. The SP3223 use an internal high-efficiency, charge-pump power supply that requires only 0.µF capacitors in 3.3V operation. This charge pump and Sipex's driver architecture allow the SP3223 series to deliver compliant RS-232 performance from a single power supply ranging from +3.3V to +5.0V. The SP3223 is a 2driver/2-receiver device ideal for laptop/notebook computer and PDA applications. 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 µA. Device SP3 2 2 3 SP3 2 2 3 E SP3 2 2 3 B SP3 2 2 3 EB SP3 2 2 3 U SP3 2 2 3 EU Po w e r Supplies +3.0V to +5.5V +3.0V to +5.5V +3.0V to +5.5V +3.0V to +5.5V +3.0V to +5.5V +3.0V to +5.5V RS-232 Drivers 2 2 2 2 2 2 RS-232 Receivers 2 2 2 2 2 2 External Components 4 capacitors 4 capacitors 4 capacitors 4 capacitors 4 capacitors 4 capacitors TTL 3St a t e YES YES YE S YE S YE S YES # of Pins 20 20 20 20 20 20 Gauranteed Data Rate 20 20 25 0 25 0 000 000 ESD Rating 2kV 5kV 2kV 5kV 2kV 5kV SELECTION TABLE AUTO ON-LINE® Circuitry YE S YE S YES YES YES YE S Applicable U.S. Patents - 5,306,954; and other patents pending. Date: 08/25/05 Date: 0/06/06 SP3223 +3.0V to +5.5V RS-232 Transceivers SP3223 +3.0V to +5.5V RS-232 Transceivers © Copyright 2005 Sipex Corporation © Copyright 2006 Sipex Corporation   ABSOLUTE MAXIMUM RATINGS 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 (SP3223)..........-0.3V to VCC + 0.3V RxIN...................................................................+15V 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 Power Dissipation per package 20-pin SSOP (derate 9.25mW/oC above +70oC)....750mW 20-pin TSSOP (derate 11.1mW/oC above +70oC)..900mW 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 DC CHARACTERISTICS Supply Current, AUTO ON-LINE® 1.0 10 µA All RxIN open, ONLINE = GND, SHUTDOWN = VCC, TxIN=VCC or GND,VCC = +3.3V, TAMB = +25° C SHUTDOWN = GND, TxIN=VCC or GND, VCC = +3.3V, TAMB = +25° C ONLINE = SHUTDOWN = VCC, no load, VCC = +3.3V, TAMB = +25° C MIN. TYP. MAX. UNITS CONDITIONS Supply Current, Shutdown 1.0 10 µA mA Supply Current, AUTO ON-LINE® Disabled LOGIC INPUTS AND RECEIVER OUTPUTS Input Logic Threshold LOW HIGH Input Leakage Current GND 2.0 0.3 1.0 0.8 VCC ±0.01 ±1. 0 V µA µA VCC = +3.3V or +5.0V, TxIN, EN, ONLINE, SHUTDOWN TxIN, EN, ONLINE, SHUTDOWN, TAMB = +25° C, VIN = OV to VCC Receivers disabled, VOUT = OV to VCC IOUT = 1.6mA IOUT = -1.0mA Output Leakage Current ±0.05 ±1 0 Output Voltage LOW Output Voltage HIGH VCC - 0.6 VCC - 0.1 0.4 V V NOTE 2: C1 - C4 0.1µF, tested at 3.3V ±10%. C1 = 0.047µF, C2-C4 = 0.33µF, tested at 5V±10%. Date: 10/06/06 SP3223 +3.0V to +5.5V RS-232 Transceivers © Copyright 2006 Sipex Corporation 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 DRIVER OUTPUTS Output Voltage Swing Output Resistance Output Short-Circuit Current Output Leakage Current RECEIVER INPUTS Input Voltage Range Input Threshold LOW Input Threshold LOW Input Threshold HIGH Input Threshold HIGH Input Hysteresis Input Resistance MIN. TYP. MAX. UNITS CONDITIONS ±5.0 300 ±5. 4 V Ω All driver outputs loaded with 3 KΩ to GND, TAMB = +25° C VCC = V+ = V- = ZeroV, VOUT = ±2V VOUT = ZeroV VCC = ZeroV or 3.0V to 5.5V, VOUT = ±12kV, Driver disabled ±35 ±6 0 ±25 mA µA -15 0.6 0.8 1. 2 1. 5 1. 5 1. 8 0. 3 3 5 15 V V V VCC = 3.3V VCC = 5.0V VCC = 3.3V VCC = 5.0V 2.4 2.4 V V V 7 kΩ AUTO ON-LINE® CIRCUITRY CHARACTERISTICS (ONLINE = GND, SHUTDOWN = VCC) STATUS Output Voltage LOW STATUS Output Voltage HIGH Receiver Threshold to Drivers Enabled (tONLINE) Receiver Positive or Negative Threshold to STATUS HIGH (tSTSH) Receiver Positive or Negative Threshold to STATUS LOW (tSTSL) VCC - 0.6 200 0.5 0.4 V V µS µS IOUT = 1.6mA IOUT = -1.0mA Figure 15 Figure 15 20 µS Figure 15 NOTE 2: C1 - C4 0.1µF, tested at 3.3V ±10%. C1 = 0.047µF, C2-C4 = 0.33µF, tested at 5V±10%. Date: 10/06/06 SP3223 +3.0V to +5.5V RS-232 Transceivers © Copyright 2006 Sipex Corporation 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 Maximum Data Rate SP3223E SP3223EB SP3223EH SP3223EU Receiver Propagation Delay tPHL tPLH Receiver Output Enable Time Receiver Output Disable Time Driver Skew E,EB EH, EU Receiver Skew Transition-Region Slew Rate E,EB EH EU 60 90 30 V/µs VCC= 3.3V, RL = 3KΩ, TAMB = 25ºC, measurements taken from -3.0V to +3.0V or +3.0V to -3.0V 100 50 200 500 ns 100 1000 ns | tPHL - tPLH |, TAMB = 25ºC | tPHL - tPLH | 200 200 ns ns 0.15 µs Receiver input to Receiver output, CL = 150pF 120 250 kbps 460 1000 RL = 3KΩ, CL = 250pF, one driver active 23 5 RL = 3KΩ, CL = 1000pF, one driver active MIN. TYP. MAX. UNITS CONDITIONS Normal operation Normal operation Date: 10/06/06 SP3223 +3.0V to +5.5V RS-232 Transceivers © Copyright 2006 Sipex Corporation 4 TYPICAL OPERATING CIRCUIT +3V to +5V C5 + 0.1µF 2 C1+ 0.1µF 4 C15 C2+ 19 VCC V+ 3 C3 + 0.1µF C1 + SP3223 C2 + V- 7 C4 + 0.1µF 0.1µF 6 C213 T1IN T1OUT T2OUT 17 8 TTL/CMOS INPUTS 12 T2IN RS-232 OUTPUTS 15 R1OUT TTL/CMOS OUTPUTS 10 R2OUT 5KΩ VCC 1 EN 20 14 To µP Supervisor Circuit R1IN 5KΩ R2IN 16 RS-232 INPUTS 9 SHUTDOWN ONLINE STATUS GND 18 11 Figure 1. SP3223 Typical Operating Circuit Date: 10/06/06 SP3223 +3.0V to +5.5V RS-232 Transceivers © Copyright 2006 Sipex Corporation 5 TYPICAL PERFORMANCE CHARACTERISTICS Unless otherwise noted, the following performance characteristics apply for VCC = +3.3V, 250Kbps data rate, all drivers loaded with 3kΩ, 0.1µF charge pump capacitors, and TAMB = +25°C. 6 30 TxOUT + Transmitter Output Voltage (VDC) 4 2 0 -2 -4 -6 0 25 Slew rate (V/µs) - Slew + Slew 20 15 10 5 0 1 Transmitter at 250Kbps 1 Transmitter at 15.6Kbps All drivers loaded 3K + Load Cap TxOUT - 1000 2000 3000 4000 5000 0 500 1000 2000 3000 4000 5000 Load Capacitance (pF) Load Capacitance (pF) Figure 2. Transmitter Output Voltage VS. Load Capacitance for the SP3223EB Figure 3. Slew Rate VS. Load Capacitance for the SP3223EB 35 20 Supply Current (mA) 30 25 250Kbps 125Kbps 15 I CC ( mA) 20 15 10 5 0 0 1000 2000 10 1 Transmitter at 250Kbps 2 Transmitters at 15.6Kbps All drivers loaded with 3K // 1000pF 20Kbps 1 Transmitter at 250Kbps 1 Transmitter at 15.6Kbps All drivers loaded 3K + Load Cap 5 3000 4000 5000 0 2.7 3 3.5 4 4.5 5 Load Capacitance (pF) Supply Voltage (VDC) Figure 4. Supply Current VS. Load Capacitance when Transmitting Data for the SP3223EB Figure 5. Supply Current VS. Supply Voltage for the SP3243EB 6 TxOUT + Transmitter Output Voltage (VDC) 4 2 0 -2 -4 -6 2.7 3 3.5 TxOUT - 4 4.5 5 Supply Voltage (VDC) Figure 6. Transmitter Output Voltage VS. Supply Voltage for the SP3243EB Date: 10/06/06 SP3223 +3.0V to +5.5V RS-232 Transceivers © Copyright 2006 Sipex Corporation 6 TYPICAL PERFORMANCE CHARACTERISTICS Unless otherwise noted, the following performance characteristics apply for VCC = +3.3V, 1000Kbps data rate, all drivers loaded with 3kΩ, 0.1µF charge pump capacitors, and TAMB = +25°C. 200 Transmitter Output Voltage (V) 6 4 2 0 -2 -4 -6 2.7 3 3.5 4 Supply Voltage (V) 4.5 5 1Driver at 1Mbps Other Drivers at 62.5Kbps All Drivers Loaded with 3K // 250pF 150 Skew (ns) 100 50 0 0 250 500 1000 1500 Load Capacitance (pF) 2000 T1 at 500Kbps T2 at 31.2Kbps All TX loaded 3K // CLoad Figure 7. Transmitter Skew VS. Load Capacitance for the 3223EU Figure 8 Transmitter Output Voltage VS. Supply Voltage for the SP3223EU 6 35 Supply Current (mA) Transmitter Output Voltage (V) 4 2 0 -2 -4 -6 0 250 500 1000 Load Capacitance (pF) 1500 T1 at 1Mbps T2 at 62.5Kbps 30 25 20 15 10 5 0 0 250 500 1000 Load Capacitance (pF) 1500 T1 at 1Mbps T2 at 62.5Kbps Figure 9. Transmitter Output Voltage VS. Load Capacitance for the SP3223EU Figure 10. Supply Current VS. Load Capacitance for the SP3223EU 20 6 SupplyCurrent (mA) Transmitter Output Voltage (V) 4 2 0 -2 -4 -6 2.7 3 3.5 4 Supply Voltage (V) 4.5 5 T1 at 1Mbps T2 at 62.5Kbps All Drivers loaded with 3K//250pF 15 10 5 0 2.7 3 3.5 4 Supply Voltage (V) 4.5 5 T1 at 1Mbps T2 at 62.5Kbps All Drivers loaded with 3K//250pF Figure 11. Supply Current VS. Supply Voltage for the SP3223EU Figure 12. Transmitter Output Voltage VS. Supply Voltage for the SP3223EU Date: 10/06/06 SP3223 +3.0V to +5.5V RS-232 Transceivers © Copyright 2006 Sipex Corporation 7 PIN DESCRIPTION NAME EN C1+ V+ C1C2+ C2VT2OUT R2IN R2OUT STATUS T2IN T1IN ONLINE FUNCTION Receiver Enable. Apply logic LOW for normal operation. Apply logic HIGH to disable the receiver outputs (high-Z state). Positive terminal of the voltage doubler charge-pump capacitor. Regulated +5.5V output generated by the charge pump. Negative terminal of the voltage doubler charge-pump capacitor. 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 driver output. RS-232 receiver input. TTL/CMOS receiver output. TTL/CMOS Output indicating online and shutdown status. TTL/CMOS driver input. TTL/CMOS driver input. Apply logic HIGH to override AUTO ON-LINE® circuitry keeping drivers active (SHUTDOWN must also be logic HIGH, refer to Table 2). TTL/CMOS receiver output. PIN # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 R1OUT R1IN T1OUT GND VCC SHUTDOWN 15 RS-232 receiver input. RS-232 driver output. Ground. +3.0V to +5.5V supply voltage. Apply logic LOW to shut down drivers and charge pump. This overrides all AUTO ON-LINE® circuitry and ONLINE (refer to Table 2). 16 17 18 19 20 Date: 10/06/06 SP3223 +3.0V to +5.5V RS-232 Transceivers © Copyright 2006 Sipex Corporation 8 DESCRIPTION The SP3223 is a 2-driver/2-receiver device ideal for portable or handheld applications. The SP3223 transceivers meet the EIA/TIA-232 and ITU-T V.28/V.24 communication protocols and can be implemented in battery-powered, portable, or handheld applications such as notebook or handheld computers. The SP3223 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 SP3223 devices operate at this typical data rate when fully loaded. Otherwise, the system automatically comes online. This feature allows design engineers to address power saving concerns without major design changes. THEORY OF OPERATION The SP3223 series is made up of four basic circuit blocks: 1. Drivers, 2. Receivers, 3. the Sipex proprietary charge pump, and 4. AUTO ON-LINE® 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-232F and all previous RS-232 versions. Unused driver inputs should be connected to GND or VCC. The drivers can guarantee output data rates fully loaded with 3KΩ in parallel with 1000pF, (SP3223EU, CL= 250pF) ensuring compatibility with PC-to-PC communication software. The slew rate of the driver output on the E and EB versions 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 Slew Rate of H and U versions is not limited to enable higher speed data tranfers. The transition of the loaded output from HIGH to LOW also meets the monotonicity requirements of the standard. Figure 12 shows a loopback test circuit used to test the RS-232 Drivers. Figure 13 shows the test results where one driver was active at 235Kbps and all drivers are loaded with an RS-232 receiver in parallel with a 1000pF capacitor. RS232 data transmission rate of 120Kbps to 1Mbps. provide compatibility with designs in personal computer peripherals and LAN applications. The SP3223 series is an ideal choice for power sensitive designs. Featuring AUTO ON-LINE® circuitry, the SP3223 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. +3V to +5V C5 + 0.1µF 2 C1+ 0.1µF 4 C15 C2+ 19 VCC V+ 3 C3 + 0.1µF C1 + SP3223 C2 + V- 7 C4 + 0.1µF 0.1µF 6 C213 T1IN T1OUT 17 T2OUT 8 TTL/CMOS INPUTS 12 T2IN RS-232 OUTPUTS UART or Serial µC 15 R1OUT TTL/CMOS OUTPUTS 10 R2OUT 5KΩ 1 VCC 20 14 11 EN SHUTDOWN ONLINE STATUS GND 18 5KΩ R1IN 16 RS-232 INPUTS R2IN 9 RESET µP Supervisor IC VIN Figure 13. Interface Circuitry Controlled by Microprocessor Supervisory Circuit Date: 10/06/06 SP3223 +3.0V to +5.5V RS-232 Transceivers © Copyright 2006 Sipex Corporation 9 +3V to +5V C5 + 0.1µF 2 C1+ 0.1µF 4 C15 C2+ 19 VCC V+ 3 C3 + 0.1µF DEVICE: SP3223 C1 + SHUTDOWN 0 0 1 1 EN 0 1 0 1 TXOUT High Z High Z Active Active RXOUT C2 SP3223 + V- 7 C4 + 0.1µF 0.1µF 6 C2T1IN T1OUT Active TTL/CMOS INPUTS High Z Active High Z 1 VCC 20 14 To µP Supervisor Circuit TXIN TXOUT R1OUT TTL/CMOS OUTPUTS RXOUT 5KΩ EN SHUTDOWN ONLINE STATUS GND 18 5KΩ R1IN RXIN 1000pF 1000pF 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. 11 Receivers The receivers convert ±5.0V EIA/TIA-232 levels to TTL or CMOS logic output levels. Receivers have an inverting output that can be disabled by using the EN pin. Receivers are active when the AUTO ON-LINE® circuitry is enabled or when in shutdown. During the shutdown, the receivers will continue to be active. If there is no activity present at the receivers for a period longer than 100µs 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 outputs of the receivers into high-impedance. The truth table logic of the SP3223 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 pulldown resistor to ground will commit the output of the receiver to a HIGH state. Figure 14. Loopback Test Circuit for RS-232 Driver Data Transmission Rates Charge Pump The charge pump is a Sipex–patented design (U.S. 5,306,954) and 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 T1 IN T1 OUT R1 OUT Figure 15. Loopback Test Circuit result at 235Kbps (All Drivers Fully Loaded) Date: 10/06/06 SP3223 +3.0V to +5.5V RS-232 Transceivers © Copyright 2006 Sipex Corporation 10 consists of a regulated dual charge pump that provides output voltages 5.5V regardless of the input voltage (VCC) over the +3.0V to +5.5V range. This is important to maintain compliant RS-232 levels regardless of power supply fluctuations. 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. 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 C 3. 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. 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. 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 Date: 10/06/06 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 connected 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. 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. AUTO ON-LINE® Circuitry The SP3223 devices have a patent pending AUTO ON-LINE® circuitry on board that saves power in applications such as laptop computers, PDA's, and other portable systems. The SP3223 devices incorporate an AUTO ON-LINE® circuit that automatically enables itself when the external transmitters are 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 can also be 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 inputs. The receiver input typically sees at least ±3V, which are generated from the transmitters at the other end of the cable with a ±5V minimum. When the external transmitters are disabled or the cable is disconnected, the receiver inputs will be pulled down by their internal 5kΩ resistors to ground. When this occurs over a period of time, the internal transmitters will be disabled and the device goes into a shutdown or standby mode. When ONLINE is HIGH, the AUTO ON-LINE® mode is disabled. © Copyright 2006 Sipex Corporation SP3223 +3.0V to +5.5V RS-232 Transceivers 11 The AUTO ON-LINE® circuit has two stages: 1) Inactive Detection 2) Accumulated Delay The first stage, shown in Figure 20, 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. This circuit is duplicated for each of the other receivers. or portable applications where the RS-232 cable is disconnected or the RS-232 drivers of the connected peripheral are turned off. 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 SP3223 driver and receiver outputs can be found in Table 2. The STATUS pin outputs a logic LOW signal if the device is shutdown. This pin goes to a logic HIGH when the external transmitters are enabled and the cable is connected. When the SP3223 devices are shut down, 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 S H U T D O W N The clock rate for the charge pump typically operates at above 250kHz. The external capacitors can be as low as 0.1µF with a 16V breakdown voltage rating. The second stage of the AUTO ON-LINE® circuitry, shown in Figure 21, processes all the receiver's RXINACT signals with an accumulated delay that disables the device to a 1µA supply current. The STATUS pin goes to a logic LOW when the cable is disconnected, the external transmitters are disabled, or the SHUTDOWN pin is invoked. The typical accumulated delay is around 20µs. When the SP3223 drivers or internal charge pump are disabled, the supply current is reduced to 1µA. This can commonly occur in handheld RECEIVER +2.7V 0V RS-232 INPUT VOLTAGES -2.7V VCC STATUS 0V tSTSL tSTSH tONLINE +5V DRIVER RS-232 OUTPUT VOLTAGES 0V -5V Figure 16. AUTO ON-LINE® Timing Waveforms Date: 10/06/06 SP3223 +3.0V to +5.5V RS-232 Transceivers © Copyright 2006 Sipex Corporation 12 VCC = +5V +5V C1 + – C4 + – + C2 + – – VDD Storage Capacitor VSS Storage Capacitor –5V –5V C3 Figure 17. Charge Pump — Phase 1 VCC = +5V C4 + – + C1 + – C2 + – – VDD Storage Capacitor VSS Storage Capacitor –10V C3 Figure 18. Charge Pump — Phase 2 [ T ] +6V a) C2+ 1 2 2 T 0V 0V b) C2T -6V Ch1 2.00V Ch2 2.00V M 1.00µs Ch1 1.96V Figure 19. Charge Pump Waveforms VCC = +5V +5V C1 + – C4 + – + C2 + – – VDD Storage Capacitor VSS Storage Capacitor –5V –5V C3 Figure 20. Charge Pump — Phase 3 VCC = +5V +10V C1 + – C4 + – + C2 + – – VDD Storage Capacitor VSS Storage Capacitor C3 Figure 21. Charge Pump — Phase 4 Date: 10/06/06 SP3223 +3.0V to +5.5V RS-232 Transceivers © Copyright 2006 Sipex Corporation 13 RS-232 SIGNAL AT RECEIVER INPUT SHUTDOWN INPUT ONLINE INPUT STATUS OUTPUT TRANSCEIVER STATUS Normal Operation (AUTO ON-LINE® ) Normal Operation Shutdown (AUTO ON-LINE® ) Shutdown Shutdown YES NO NO YES NO HIGH HIGH HIGH LOW LO W LO W HIGH LO W HIGH/LOW HIGH/LOW HIGH LO W LOW HIGH LOW Table 3. AUTO ON-LINE® Logic Inactive Detection Block RXINACT RXIN RS-232 Receiver Block RXOUT Figure 22. Stage I of AUTO ON-LINE® Circuitry Delay Buffer Delay Buffer STATUS R1ON R2ON SHUTDOWN Figure 23. Stage II of AUTO ON-LINE® Circuitry Date: 10/06/06 © Copyright 2006 Sipex Corporation SP3223 +3.0V to +5.5V RS-232 Transceivers 14 The Sipex-patented charge pumps are 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.) 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 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 selfinductance, 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. Minimum recommended charge pump capacitor value 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 = 0.1uF C1 = 0.047uF, C2-C4 = 0.33uF C1 – C4 = 0.22uF Date: 10/06/06 SP3223 +3.0V to +5.5V RS-232 Transceivers © Copyright 2006 Sipex Corporation 15 ESD TOLERANCE The S P3223E s eries incorporates ruggedized ESD cells on all 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. 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 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 23. 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 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. RS S 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 22. This method will test the IC’s capability to withstand an ESD transient during normal handling such as in manufacturing 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, 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 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 RC C SW1 DC Power Source SW2 CS S Device Under Test Figure 24. ESD Test Circuit for Human Body Model Date: 10/06/06 SP3223 +3.0V to +5.5V RS-232 Transceivers © Copyright 2006 Sipex Corporation 16 Contact-Discharge Module RC RC SW1 DC Power Source RS RS RV SW2 CS S Device Under Test RS and RV add up to 330Ω for IEC1000-4-2. Figure 25. ESD Test Circuit for IEC1000-4-2 The circuit model in Figures 22 and 23 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. For the Human Body Model, the current limiting resistor (RS) and the source capacitor (CS) are 1.5kΩ an 100pF, respectively. For IEC-1000-42, 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. DEVICE PIN TESTED Driver Outputs Receiver Inputs 30A 15A 0A t=0ns t➙ Figure 26. ESD Test Waveform for IEC1000-4-2 t=30ns HUMAN BODY MODEL ±15kV ±15kV i➙ Air Discharge ±15kV ±15kV IEC1000-4-2 Direct Contact ±8kV ±8kV Level 4 4 Table 4. Transceiver ESD Tolerance Levels Date: 10/06/06 SP3223 +3.0V to +5.5V RS-232 Transceivers © Copyright 2006 Sipex Corporation 17 20 Pin PDiP Date: 10/06/06 SP3223 +3.0V to +5.5V RS-232 Transceivers © Copyright 2006 Sipex Corporation 18 20 Pin TSSOP Date: 10/06/06 SP3223 +3.0V to +5.5V RS-232 Transceivers © Copyright 2006 Sipex Corporation 19 20 Pin SSOP Date: 10/06/06 SP3223 +3.0V to +5.5V RS-232 Transceivers © Copyright 2006 Sipex Corporation 20 PRODUCT NOMENCLATURE SP 3223 E U EY L /TR Tape and Reel options Sipex “L” suffix indicates Lead Free packaging Package Type Part Number A= SSOP P=PDIP Y=TSSOP C= Commercial Range 0ºc to 70ºC E= Extended Range -40ºc to 85ºC Temperature Range Speed Indicator Blank= 120Kbps B= 250Kbps H= 450Kbps U= 1Mbps ESD Rating E= 15kV HBM and IEC 1000-4 Date: 10/06/06 SP3223 +3.0V to +5.5V RS-232 Transceivers © Copyright 2006 Sipex Corporation 21 ORDERING INFORMATION Part Number Temperature Range Package Types SP3223EBCP .................................................... 0°C to +70°C -------------------------------------------- 20-pin PDIP SP3223EBCA .................................................... 0°C to +70°C ------------------------------------------- 20-pin SSOP SP3223EBCA/TR .............................................. 0°C to +70°C ------------------------------------------- 20-pin SSOP SP3223EBCY .................................................... 0°C to +70°C ----------------------------------------- 20-pin TSSOP SP3223EBCY/TR .............................................. 0°C to +70°C ----------------------------------------- 20-pin TSSOP SP3223EBEP .................................................. -40°C to +85°C ------------------------------------------- 20-pin PDIP SP3223EBEA .................................................. -40°C to +85°C ------------------------------------------ 20-pin SSOP SP3223EBEA/TR ............................................ -40°C to +85°C ------------------------------------------ 20-pin SSOP SP3223EBEY .................................................. -40°C to +85°C ---------------------------------------- 20-pin TSSOP SP3223EBEY/TR ............................................ -40°C to +85°C ---------------------------------------- 20-pin TSSOP SP3223ECA ...................................................... 0°C to +70°C .................................................... 20-pin SSOP SP3223ECA/TR ................................................ 0°C to +70°C .................................................... 20-pin SSOP SP3223ECP ...................................................... 0°C to +70°C ...................................................... 20-pin PDIP SP3223ECY ...................................................... 0°C to +70°C .................................................. 20-pin TSSOP SP3223ECY/TR ................................................ 0°C to +70°C .................................................. 20-pin TSSOP SP3223EEA ..................................................... SP3223EEA/TR ............................................... SP3223EEP ..................................................... SP3223EEY ..................................................... SP3223EEY/TR ............................................... -40°C to +85°C .................................................. 20-pin SSOP -40°C to +85°C .................................................. 20-pin SSOP -40°C to +85°C .................................................... 20-pin PDIP -40°C to +85°C ................................................ 20-pin TSSOP -40°C to +85°C ................................................ 20-pin TSSOP SP3223EUCP .................................................... 0°C to +70°C ...................................................... 20-pin PDIP SP3223EUCA .................................................... 0°C to +70°C .................................................... 20-pin SSOP SP3223EUCA/TR .............................................. 0°C to +70°C .................................................... 20-pin SSOP SP3223EUCY .................................................... 0°C to +70°C .................................................. 20-pin TSSOP SP3223EUCY/TR .............................................. 0°C to +70°C .................................................. 20-pin TSSOP SP3223EUEP .................................................. SP3223EUEA .................................................. SP3223EUEA/TR ............................................ SP3223EUEY .................................................. SP3223EUEY/TR ............................................ -40°C to +85°C .................................................... 20-pin PDIP -40°C to +85°C .................................................. 20-pin SSOP -40°C to +85°C .................................................. 20-pin SSOP -40°C to +85°C ................................................ 20-pin TSSOP -40°C to +85°C ................................................ 20-pin TSSOP Available in lead free packaging. To order add "-L" suffix to part number. Example: SP3223EUEY/TR = standard; SP3223EUEY-L/TR = lead free /TR = Tape and Reel Pack quantity is 1,500 for SSOP, TSSOP and WSOIC. CLICK HERE TO ORDER SAMPLES Date: 10/06/06 SP3223 +3.0V to +5.5V RS-232 Transceivers © Copyright 2006 Sipex Corporation 22 orDerinG inForMATion Contact factory for availability of the following legacy part numbers. For long term availability Sipex recommends upgrades as listed below. All upgrade part numbers shown are fully pinout and function compatible with legacy part numbers. Upgrade part numbers may contain feature and/or performance enhancements or other changes to datasheet parameters. Legacy Part Number SP3223BCA SP3223BCA/TR SP3223BCA-L SP3223BCA-L/TR SP3223BCP SP3223BCY SP3223BCY/TR SP3223BCY-L SP3223BCY-L/TR SP3223BEA SP3223BEA/TR SP3223BEA-L SP3223BEA-L/TR SP3223BEP SP3223BEY SP3223BEY/TR SP3223BEY-L SP3223BEY-L/TR SP3223CA SP3223CA/TR SP3223CA-L SP3223CA-L/TR SP3223CP SP3223CY SP3223CY/TR SP3223CY-L SP3223CY-L/TR SP3223EA SP3223EA/TR SP3223EA-L SP3223EA-L/TR SP3223EHCA SP3223EHCA/TR SP3223EHCA-L SP3223EHCA-L/TR SP3223EHCP Recommended Upgrade SP3223EBCA SP3223EBCA/TR SP3223EBCA-L SP3223EBCA-L/TR SP3223EBCP SP3223EBCY SP3223EBCY/TR SP3223EBCY-L SP3223EBCY-L/TR SP3223EBEA SP3223EBEA/TR SP3223EBEA-L SP3223EBEA-L/TR SP3223EBEP SP3223EBEY SP3223EBEY/TR SP3223EBEY-L SP3223EBEY-L/TR SP3223ECA SP3223ECA/TR SP3223ECA-L SP3223ECA-L/TR SP3223ECP SP3223ECY SP3223ECY/TR SP3223ECY-L SP3223ECY-L/TR SP3223EEA SP3223EEA/TR SP3223EEA-L SP3223EEA-L/TR SP3223EUCA SP3223EUCA/TR SP3223EUCA-L SP3223EUCA-L/TR SP3223EUCP Legacy Part Number SP3223EHCY SP3223EHCY/TR SP3223EHCY-L SP3223EHCY-L/TR SP3223EP SP3223EY SP3223EY/TR SP3223EY-L SP3223EY-L/TR SP3223HCA SP3223HCA/TR SP3223HCA-L SP3223HCA-L/TR SP3223HCP SP3223HCY SP3223HCY/TR SP3223HCY-L SP3223HCY-L/TR SP3223UCA SP3223UCA/TR SP3223UCA-L SP3223UCA-L/TR SP3223UCP SP3223UCY SP3223UCY/TR SP3223UCY-L SP3223UCY-L/TR SP3223UEA SP3223UEA/TR SP3223UEA-L SP3223UEA-L/TR SP3223UEP SP3223UEY SP3223UEY/TR SP3223UEY-L SP3223UEY-L/TR Recommended Upgrade SP3223EUCY SP3223EUCY/TR SP3223EUCY-L SP3223EUCY-L/TR SP3223EEP SP3223EEY SP3223EEY/TR SP3223EEY-L SP3223EEY-L/TR SP3223EUCA SP3223EUCA/TR SP3223EUCA-L SP3223EUCA-L/TR SP3223EUCP SP3223EUCY SP3223EUCY/TR SP3223EUCY-L SP3223EUCY-L/TR SP3223EUCA SP3223EUCA/TR SP3223EUCA-L SP3223EUCA-L/TR SP3223EUCP SP3223EUCY SP3223EUCY/TR SP3223EUCY-L SP3223EUCY-L/TR SP3223EUEA SP3223EUEA/TR SP3223EUEA-L SP3223EUEA-L/TR SP3223EUEP SP3223EUEY SP3223EUEY/TR SP3223EUEY-L SP3223EUEY-L/TR Sipex Corporation Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 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 hereing; neither does it convey any license underassume any liability arising out of the applicaSipex Corporation reserves the right to make changes to any products described herein. Sipex does not its patent rights nor the rights of others. tion or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. Date: 08/25/05 Date: 08/28/05 SP3223 +3.0V to +5.5V RS-232 SP3223 +3.0V to +5.5V RS-232 Transceivers Transceivers © Copyright 2005 Sipex Corporation 2 233