SP322

® SP322 Programmable V.11/V.35 Transceiver ■ +5V Only Operation ■ Programmable V.11 or V.35 Selection ■ Three Differential V.11 Transceivers in V.11 Mode ■ Three Differential V.35 Transceivers in V.35 Mode ■ No External Resistor Termination for Compliant V.35 Operation ■ V.11 Cable Termination (approx. 120Ω) Internally Configured in V.11 Mode ■ Tri-State capability on drivers and receivers ■ Ideal low cost solution for X.25 or Frame Relay Serial Ports DESCRIPTION The SP322 is a programmable V.11 or V.35 transceiver IC. The SP322 contains three drivers and three receivers when selected in each mode. The selection is done by the V.11/V.35 select pin. The V.11 transceivers can typically operate at 10Mbps while adhering to the ITU V.11 specifications. The V.35 transceivers can operate up to 10Mbps while adhering to the ITU V.35 specifications. The SP322 contains internal resistor termination for compliant V.35 operation as well as the V.11 termination on the receiver inputs for optional cable termination. Each SP322 driver contains a control pin which disables the output and places the output pins in a high impedance state. Each receiver also has a control pin which places the receiver outputs in a high impedance state. The enable pins will disconnect the internal termination network for whichever mode the SP322 is selected. For the receivers, the enable pin will place the input pins in a high impedance (approx. 15kΩ). This allows for convenient DTE-DCE configuration by connecting the driver outputs to the receiver inputs, thus allowing the enable pins to select the desired DTE or DCE operation. V.35 WAN EIA-530 SP322DS/06 Rev. 7/9/03 SP322 V.11/V.35 Serial Transceiver SP322 V.11/V.35 Serial Transceiver © Copyright 1997 Sipex Corporation © Copyright 2003 Sipex Corporation 1 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. VCC...........................................................................+7V Storage Temperature..........................-65˚C to +150˚C Power Dissipation 44-pin Plastic QFP...........................1500mW Package Derating: 44-pin Plastic QFP øJA....................................................52 °C/W SPECIFICATIONS Typically 25°C @ Vcc = +5V unless otherwise noted. MIN. LOGIC INPUTS VIL VIH LOGIC OUTPUTS VOL VOH V.35 DRIVER DC Characteristics Outputs Test Terminated Voltage Source Impedance Short Circuit Impedance Offset AC Characteristics Outputs Transition Time Propagation Delay tPHL tPLH Max. Transmission Rate V.35 RECEIVER DC Characteristics Inputs Input Sensitivity Input Impedance Short Circuit Impedance AC Characteristics Inputs Propagation Delay tPHL tPLH Max. Transmission Rate TYP. MAX. 0.8 UNITS Volts Volts Volts Volts CONDITIONS 2.0 0.4 2.4 IOUT= -3.2mA IOUT= 1.0mA ±0.44 50 135 ±0.55 100 150 ±0.66 150 165 ±0.6 Volts Ω Ω Volts per Figure 10 per Figure 11 per Figure 12 per Figure 10 40 40 40 10 70 70 100 100 ns ns ns Mbps per Figure 13; 10% to 90% per Figures 18 and 19 per Figures 18 and 19 per Figures 18 and 19 90 135 +80 100 150 110 165 mV Ω Ω per Figure 14 per Figure 15 50 50 10 100 100 150 150 ns ns Mbps per Figures 18 and 21 per Figures 18 and 21 per Figure 18 Rev. 7/9/03 SP322 V.11/V.35 Serial Transceiver © Copyright 2003 Sipex Corporation 2 SPECIFICATIONS Typically 25°C @ Vcc = +5V unless otherwise noted. MIN. V.11 DRIVER DC Characteristics Outputs Open Circuit Voltage Test Terminated Voltage Balance Offset Short-Circuit Current Power-Off Current AC Characteristics Outputs Transition Time Propagation Delay tPHL tPLH Differential Skew Max. Transmission Rate V.11 RECEIVER DC Characteristics Inputs Common Mode Range Sensitivity Input Current Current w/ 100Ω Term. AC Characteristics Inputs Propagation Delay tPHL tPLH Differential Skew Max. Transmission Rate ENABLE TIMING Driver Enable Time Enable to Low Enable to High Disable Time Disable From Low Disable From High Receiver Enable Time Enable to Low Enable to High Disable Time Disable From Low Disable From High POWER REQUIREMENTS Supply Voltage VCC Supply Current ICC Shutdown V.35 Mode V.11 Mode TYP. MAX. UNITS CONDITIONS ±2.0 0.5VOC ±6.0 ±5.0 0.67VOC ±0.4 ±3.0 ±150 ±100 20 Volts Volts Volts Volts Volts mA µA ns ns ns ns Mbps per Figure 1 per Figure 2 per Figure 2 per Figure 2 per Figure 3 per Figure 5 VCC = +5V for AC parameters per Figure 4; 10% to 90% Using CL=50pF per Figures 18 and 19 per Figures 18 and 19 per Figures 18 and 19 50 50 10 80 80 20 100 100 40 –7 +7 ±0.3 ±3.25 ±60.75 Volts Volts mA mA per Figures 6 and 7 per Figures 8 and 9 VCC = +5V for AC parameters Using CL=50pF per Figures 18 and 21 per Figures 18 and 21 per Figure 18 50 50 10 110 110 20 150 150 ns ns ns Mbps 90 90 90 90 90 90 90 90 500 500 500 500 500 500 500 500 ns ns ns ns ns ns ns ns See Figures 16 and 20 CL=15pF, S1 Closed CL=15pF, S2 Closed See Figures 16 and 20 CL=15pF, S1 Closed CL=15pF, S2 Closed See Figures 17 and 22 CL=15pF, S1 Closed CL=15pF, S2 Closed See Figures 17 and 22 CL=15pF, S1 Closed CL=15pF, S2 Closed +4.75 4 45 95 +5.25 Volts µA mA mA Driver outputs loaded with 100Ω Driver outputs loaded with 100Ω SP322DS/06 Rev. 7/9/03 SP322 V.11/V.35 Serial Transceiver SP322 V.11/V.35 Serial Transceiver © Copyright 1997 Sipex Corporation © Copyright 2003 Sipex Corporation 3 TEST CIRCUITS... A A V OCA 50Ω VT 3.9kΩ VOC VOCB 50Ω B B VOS C C Figure 1. V.11 Driver Output Open-Circuit Voltage Figure 2. V.11 Driver Output Test Terminated Voltage A Isa VCC = 0V A Ixa Isb B ±0.25V C B C Figure 3. V.11 Driver Output Short-Circuit Current VCC = 0V A A ±0.25V 50Ω Oscilloscope 50Ω Ixb B 50Ω VE B C C Figure 4. V.11 Driver Output Rise/Fall Time Figure 5. V.11 Driver Output Power-Off Current Rev. 7/9/03 SP322 V.11/V.35 Serial Transceiver © Copyright 2003 Sipex Corporation 4 A A Iia ±10V Iia ±6V 100Ω to 150Ω B B C C A A ±6V ±10V 100Ω to 150Ω Iib B Iib B C C Figure 6. V.11 Receiver Input Current Figure 8. V.11 Receiver Input Current w/ Termination V.11 RECEIVER +3.25mA V.11 RECEIVER w/ Optional Cable Termination (100Ω to 150Ω) i [mA] = V [V] / 0.1 i [mA] = (V [V] – 3) / 4.0 –10V –3V +3V +10V –6V –3V +3V +6V Maximum Input Current versus Voltage –3.25mA Figure 7. V.11 Receiver Input IV Graph i [mA] = V [V] / 0.1 i [mA] = (V [V] – 3) / 4.0 Maximum Input Current versus Voltage Figure 9. V.11 Receiver Input Graph w/ Termination SP322 V.11/V.35 Serial Transceiver SP322 V.11/V.35 Serial Transceiver © Copyright 1997 Sipex Corporation © Copyright 2003 Sipex Corporation SP322DS/06 Rev. 7/9/03 5 A A V1 50Ω VT 50Ω VOS B V2 50Ω 24kHz, 550mVp-p Sine Wave B C C Figure 10. V.35 Driver Output Test Terminated Voltage Figure 11. V.35 Driver Output Source Impedance A A 50Ω Oscilloscope B ISC 50Ω B ±2V 50Ω C C Figure 12. V.35 Driver Output Short-Circuit Impedance Figure 13. V.35 Driver Output Rise/Fall Time V1 A 50Ω 24kHz, 550mVp-p Sine Wave A V2 B Isc B ±2V C C Figure 14. V.35 Receiver Input Source Impedance Figure 15. V.35 Receiver Input Short-Circuit Impedance Rev. 7/9/03 SP322 V.11/V.35 Serial Transceiver © Copyright 2003 Sipex Corporation 6 Output Under Test 500Ω CL S1 VCC Receiver Output CRL Test Point S1 1KΩ S2 1KΩ VCC S2 Figure 16. Driver Timing Test Load #2 Circuit VCC A ROUT B CL2 Figure 17. Receiver Timing Test Load Circuit CL1 TIN A B 15pF Figure 18. Driver/Receiver Timing Test Circuit SWITCHING WAVEFORMS... +3V DRIVER INPUT 0V A DRIVER OUTPUT B tDPHL tDPLH VO 1/2VO f = 1MHz; tR ≤ 10ns; tF ≤ 10ns 1.5V tPLH tPHL 1/2VO 1.5V DIFFERENTIAL VO+ OUTPUT 0V V A – V B V O– tSKEW = |tDPLH - tDPHL| Figure 19. Driver Propagation Delays tF tR +3V ENABLE 0V 5V A, B VOL VOH A, B 0V f = 1MHz; tR < 10ns; tF < 10ns 1.5V tZL 2.3V Output normally LOW 1.5V tLZ 0.5V 0.5V tHZ 2.3V tZH Output normally HIGH Figure 20. Driver Enable and Disable Times SP322DS/06 Rev. 7/9/03 SP322 V.11/V.35 Serial Transceiver SP322 V.11/V.35 Serial Transceiver © Copyright 1997 Sipex Corporation © Copyright 2003 Sipex Corporation 7 VOD2+ A–B VOD2– VOH RECEIVER OUT VOL f = 1MHz; tR ≤ 10ns; tF ≤ 10ns 0V INPUT 0V 50% 50% tPLH OUTPUT tPHL Figure 21. Receiver Propagation Delays +3V ENABLE ENABLE 0V 5V RECEIVER OUT VIL VIH RECEIVER OUT 0V f = 1MHz; tR < 10ns; tF < 10ns 1.5V tZL 50% Output normally LOW 1.5V tLZ 0.5V 0.5V tHZ 50% tZH Output normally HIGH Figure 22. Receiver Enable and Disable Times Figure 23. Typical V.11 Driver Output Figure 24. Typical V.35 Driver Output Rev. 7/9/03 SP322 V.11/V.35 Serial Transceiver © Copyright 2003 Sipex Corporation 8 38 37 42 40 39 36 43 EN_R2 EN_R3 R1IN(a) R1IN(b) R2IN(a) R2IN(b) R3IN(a) R3IN(b) T1IN T2IN T3IN 44 41 35 34 EN_R1 GND VCC GND R3OUT R2OUT R1OUT EN_T1 EN_T2 EN_T3 VCC 1 2 3 4 5 6 7 8 9 10 11 19 13 14 20 21 12 15 16 17 18 22 33 32 31 30 29 28 SP322 27 26 25 24 23 T1OUT(a) T1OUT(b) GND VCC T2OUT(a) T2OUT(b) GND VCC T3OUT(a) T3OUT(b) GND Figure 25. SP322 Pinout V.11/V.35 V.11_TERM SD VCC C1+ VDD C2+ GND C1– C2– VSS +5V 1.0µF 1.0µF C1+ 1.0µF C1– C2+ 1.0µF C2– T1OUTA T1IN VCC Charge Pump VDD VSS 1.0µF SP322 T1 T1OUTB T1ENA T2OUTA T2IN T2ENA T3OUTA T3IN T3ENA R1INA R1OUT R1ENA R2INA R2OUT R2ENA R3INA R3OUT R3ENA T2 T2OUTB T3 T3OUTB R1 T R1INB R2 T R2INB R3 T R3INB V.11_TERM V.11/V.35 SD GND Figure 26. SP322 Typical Operating Circuit SP322DS/06 Rev. 7/9/03 SP322 V.11/V.35 Serial Transceiver SP322 V.11/V.35 Serial Transceiver © Copyright 1997 Sipex Corporation © Copyright 2003 Sipex Corporation 9 THEORY OF OPERATION The SP322 is a programmable V.11 or V.35 transceiver IC. It contains three driver and three receivers which can be configured to either V.11 or V.35 physical layer electrical characteristics. The transceivers within the SP322 include all the necessary termination resistor networks required for compliant V.11 and V.35 signals. This simplifies serial port designs using V.11 or V.35 where the engineer does not have to configure V.11 cable termination resistors and the V.35 network. The SP322 contains four basic blocks: the charge pump, differential drivers, differential receivers, termination network circuitry. Each block is described in the following. Charge–Pump The SP322 charge pump is smaller version of the Sipex–patented design (U.S. 5,306,954). The charge pump still requires four external capacitors and uses a four–phase voltage shifting technique to attain symmetrical 10V power supplies. But the pump is only used for providing internal biasing for the transceivers and the termination circuitry. The VDD and VSS outputs provide only 3mA of output current and should not be connected to bias other external circuitry. Recommended charge pump capacitor values are 1µF or greater. The internal oscillator provides a clock rate for the charge pump which typically operates at 15kHz. Drivers The SP322 has three differential drivers. There are two types of drivers includes within the SP322: V.11 drivers and V.35 drivers. When configured in V.11 mode, the V.11 drivers produce a differential output compliant with the V.11 and RS-422 electrical specifications. This includes the all the DC electrical parameters such as VOC, VT, VOS, etc. The strength of the SP322 drivers allow them to also drive signals per the RS-485 standard. The VT minimum of ±1.5V is provided by the driver output given a load of 54Ω as opposed to ±2.0V with a 100Ω load for RS-422. However, the drivers are not intended to operate over the RS-485 common mode range of +12V to -7V. The common mode range for the V.11 drivers is +7V to -7V which is in accordance to the ITU V.11 specification. When in V.35 mode, the drivers provide V.35 signals compliant to the ITU V.35 electrical specification. Specifically, the V.35 driver is designed to supply a differential output of ±0.55V with an offset of less than 0.6V. With Sipex's patent-pending V.35 driver design, the driver also adheres to impedance measurements such as driver output source impedance (100Ω ±50Ω) and driver output short-circuit impedance (150Ω ±15Ω). Traditional V.35 drivers require a resistor network to provide the proper V.35 impedance specifications for the driver outputs. The SP322 V.35 driver does this without the aid of any external components attached to the driver output. Its unique design contains internal resistance matching and switching to provide compliant V.35 signals. Each driver includes an enable pin for added convenience. The driver enable pins are low active and will tri-state the driver outputs if a logic "1" is applied. During this state, the drivers are high impedance. The enable pins include a pull-down resistor so that the pin can be unconnected where the driver will always be enabled. Regardless of physical protocol, the drivers can operate to at least 10Mbps. Receivers The SP322 has three differential receivers which are used for either V.11 or V.35. The receivers have a 200mV sensitivity and operate over the common mode range of +7V to -7V. The receiver itself is the same in either V.11 or V.35 mode. The receiver input termination is configured differently for each mode (V.11/V.35 pin). The receivers also include enable pins for convenience. The receiver enable pins are high active where a logic "0" will tri-state the receiver outputs. During tri-state, the receiver inputs are approximately 12kΩ. Any termination associated with the operating mode is disconnected during tri-state of that receiver. The receiver enable pins have a pull-up resistor that allows the pins to be unconnected. The receiver will always be active in this case. The differential receiver can operate to at least 10Mbps. Rev. 7/9/03 SP322 V.11/V.35 Serial Transceiver © Copyright 2003 Sipex Corporation 10 Termination Circuitry Unique to Sipex, the SP322 provides internal resistor networks for V.35 as well as the cable termination for V.11. The resistor network for the V.35 receivers are configured as a typical V.35 receiver using two 51Ω resistors in series tied to the A and B inputs with a 124Ω center-tap resistor to ground. The network is internally switched on during V.35 mode (V.11/V.35 = VCC) using high performance, low rON transistors. The transistors can operate efficiently over +7V to -7V, and can tolerate over +10V to -10V without damage. This termination provides the proper V.35 receiver input impedance of 100Ω and short-circuit impedance at 2V of 150Ω with 10% accuracy. The configuration for the V.11 receiver input resistor network is similar to the V.35 network except that the 124Ω resistor is disconnected (V.11/V.35 = 0V). A series resistor is also added increase the input impedance to over 120Ω for the V.11 cable termination. The minimum resistance per the ITU V.11 specification is 100Ω. The V.11 termination can be switched off using the V.11_TERM pin. For a terminated V.11 receiver, this pin is at a logic "1". A logic "0" will inform the switches to disconnect the V.11 termination. Shutdown The SP322 includes a shutdown pin (SD) which disables the charge pump and all power consuming circuitry to provide low ICC. A logic "1" to the SD pin will shut down the SP322 where it will draw less than 20µA of current. NET1/2 European Compliancy As with all of Sipex's previous multi-protocol transceiver ICs, the SP322 drivers and receivers have been designed to meet all electrical specifications for ITU V.11 and V.35. Furthermore, it is internally tested and will pass the NET1/2 physical layer testing requirements. Please note that although the SP322 adheres to NET1/2 testing, any complex or unusual configuration should be double-checked to ensure NET compliance. Consult factory for details. Applications Information The SP322 is designed for serial port applications needing V.11 and V.35 transceivers. The SP322 supports a variety of physical layer protocols such as EIA-530, EIA-530A, RS-449, and V.36 where V.11 transceivers are used for clock and data signals. The termination resistors are recommended for crosstalk and reflections elimination under higher speed operation. Internal termination solves many headaches and configuration hassles with implementing V.11 and V.35. The SP322 provides a simple, lowcost solution for the clock and data lines for synchronous serial ports. The handshaking lines such as CTS, DTR, etc. can be implemented using discrete RS-422 or RS-232 transceivers, depending on the mode supported. S ipex supplies either differential (V.11) or singleended (V.28) discrete transceiver products to mate with the SP322. SP322DS/06 Rev. 7/9/03 SP322 V.11/V.35 Serial Transceiver SP322 V.11/V.35 Serial Transceiver © Copyright 1997 Sipex Corporation © Copyright 2003 Sipex Corporation 11 PACKAGE: 44 Pin MQFP 1 D D1 D2 1 0.30" RAD. TYP. c 1 E1 E 0° MIN. 0.20" RAD. TYP. C L -A- -B- E2 5°-16° 0°–7° -DC L L L1 A2 b e A1 A Seating Plane 5°-16° DIMENSIONS Minimum/Maximum (mm) SYMBOL A A1 A2 b D D1 D2 E E1 E2 e N 44–PIN MQFP JEDEC MS-022 (AB) Variation MIN 0.00 1.80 0.29 13.20 BSC 10.00 BSC 8.00 REF 13.20 BSC 10.00 BSC 8.00 REF 0.80 BSC 44 2.00 NOM MAX 2.45 0.25 2.20 0.45 COMMON DIMENTIONS SYMBL MIN c L L1 0.11 0.73 0.88 NOM MAX 23.00 1.03 1.60 BASIC 44 PIN MQFP (MS-022 BC) Rev. 7/9/03 SP322 V.11/V.35 Serial Transceiver © Copyright 2003 Sipex Corporation 12 PACKAGE: 44 Pin LQFP D D1 0.2 RAD. MAX. c 0.08 RAD. MIN. Pin 1 11° - 13° C L E1 E 0°–7° 11° - 13° -DC L L L1 0° Min A2 A b e A1 Seating Plane DIMENSIONS Minimum/Maximum (mm) SYMBOL A A1 A2 b D D1 e E E1 N 44–PIN LQFP JEDEC MS-026 (BCB) Variation MIN NOM MAX 1.60 0.05 1.35 0.30 1.40 0.37 0.15 1.45 0.50 COMMON DIMENTIONS SYMBL MIN c L L1 0.11 0.45 0.60 NOM MAX 23.00 0.75 1.00 BASIC 12.00 BSC 10.00 BSC 0.80 BSC 12.00 BSC 10.00 BSC 44 44 PIN LQFP SP322DS/06 Rev. 7/9/03 SP322 V.11/V.35 Serial Transceiver SP322 V.11/V.35 Serial Transceiver © Copyright 1997 Sipex Corporation © Copyright 2003 Sipex Corporation 13 ORDERING INFORMATION Model Temperature Range Package Types SP322CF ........................................................................... 0°C to +70°C ............................................................................................ 44–pin MQFP Please consult the factory for pricing and availability on a Tape-On-Reel option. Corporation ANALOG EXCELLENCE Sipex Corporation Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 Sales Office 22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com 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 under its patent rights nor the rights of others. Rev. 7/9/03 SP322 V.11/V.35 Serial Transceiver © Copyright 2003 Sipex Corporation 14