SP503

SP503 Multiprotocol Transceiver ■ Single Chip Programmable Serial Transceiver ■ Seven (7) Drivers and Seven (7) Receivers ■ Software-Selectable Industry Standard Protocols: — RS-232 (V.28) — EIA-530 — RS-449 — RS-422A (V.11, X.27) — RS-485 — V.35 ■ Independant Driver and Receiver Mode Selection ■ +5V Single Power Supply Operation ■ Surface Mount Packaging 77 SCT(b) 76 SCT(a) 69 DM(b) 68 DM(a) 71 RD(b) 70 RD(a) 67 CS(b) 66 CS(a) 61 SD(a) 65 TT(b) 63 TT(a) 75 GND 72 GND 64 GND 78 DSR 80 CTS 79 SCT 74 VCC 73 VCC 62 VCC RxD 1 RDEC0 2 RDEC1 3 RDEC2 4 RDEC3 5 TTEN 6 SCTEN 7 VCC 8 TDEC3 9 TDEC2 10 TDEC1 11 TDEC0 12 DTR 13 TxD 14 TxC 15 RTS 16 RL 17 NC 18 DCD 19 RxC 20 60 GND 59 SD(b) 58 TR(a) 57 GND 56 TR(b) 55 VCC 54 RS(a) 53 GND SP503 52 RS(b) 51 LL(a) 50 GND 49 LL(b) 48 VCC 47 RL(a) 46 GND 45 RL(b) 44 ST(b) 43 GND 42 ST(a) 41 VCC RT(a) 37 RR(a) 35 RR(b) 36 RT(b) 38 IC(a) 39 STEN 23 GND 29 C1– 30 C2– 31 Now Available in Lead Free Packaging DESCRIPTION The SP503 is a highly integrated serial transceiver that allows software control of its interface modes. It offers hardware interface modes for RS-232 (V.28), RS-422A (V.11), RS-449, RS-485, V.35, and EIA-530. The SP503 is fabricated using low–power BiCMOS process technology, and incorporates a Exar patented (5,306,954) charge pump allowing +5V only operation. Drivers Receivers SP503 Charge Pump Driver Decode Receiver Decode SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 1 GND 34 IC(b) 40 VCC 25 C1+ 26 VDD 27 C2+ 28 VCC 33 RI 21 ST 22 LL 24 VSS 32 ELECTRICAL CHARACTERISTICS TMIN to TMAX @ Vcc = +5V ±5% unless otherwise noted. MIN. LOGIC INPUTS VIL VIH LOGIC OUTPUTS VOL VOH RS-485 DRIVER TTL Input Levels VIL VIH Outputs HIGH Level Output LOW level Output Differential Output Balance Open Circuit Voltage Output Current Short Circuit Current Transition Time Maximum Transmission Rate Propagation Delay tPHL tPLH RS-485 RECEIVER TTL Output Levels VOL VOH Input HIGH Threshold LOW Threshold Common Mode Range HIGH Input Current LOW Input Current Receiver Sensitivity TYP. MAX. 0.8 UNITS Volts Volts Volts Volts CONDITIONS 2.0 0.4 2.4 IOUT= -3.2mA IOUT= 1.0mA 0.8 2.0 +6.0 –0.3 ±1.5 28.0 ±250 120 5 200 200 ±5.0 ±0.2 ±6.0 Volts Volts Volts Volts Volts Volts Volts mA mA ns Mbps ns ns RL=54Ω, CL=50pF |VT| - |VT| RL=54Ω Terminated in –7V to +12V Rise/fall time, 10%–90% RL=54Ω RL=54Ω RL=54Ω 0.4 2.4 +0.2 –7.0 –7.0 +12.0 –0.2 +12.0 ±0.2 Volts Volts Volts Volts Volts Volts kΩ Mbps (a)-(b) (a)-(b) Refer to graph Refer to graph Over –7V to +12V common mode range Input Impedance 12 Maximum Transmission Rate 5 Propagation Delay tPHL tPLH V.35 DRIVER TTL Input Levels VIL VIH 2.0 Outputs Differential Output ±0.44 Output Impedance Short Circuit Impedance Transition Time Maximum Transmission Rate Propagation Delay tPHL tPLH 50 135 5 150 200 200 ns ns 0.8 ±0.66 150 165 40 200 200 Volts Volts Volts Ω Ω ns Mbps ns ns With termination network in Figure 6; RL=100Ω With termination network in Figure 6. With termination network in Figure 6. RL=100Ω RL=100Ω RL=100Ω SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 2 ELECTRICAL CHARACTERISTICS TMIN to TMAX @ Vcc = +5V ±5% unless otherwise noted. MIN. V.35 RECEIVER TTL Output Levels VOL VOH Input Receiver Sensitivity Input Impedance Short Circuit Impedance TYP. MAX. UNITS CONDITIONS 0.4 2.4 90 135 ±0.2 100 150 110 165 Volts Volts Volts Ω Ω Mbps With termination network in Figure 6. With termination network in Figure 6. Maximum Transmission Rate 5 Propagation Delay tPHL tPLH RS-422 DRIVER TTL Input Levels VIL 2.0 VIH Outputs Differential Output ±2.0 Open Circuit Voltage,VO Balance Offset Short Circuit Current Power Off Current Transition Time Maximum Transmission Rate 5 Propagation Delay tPHL tPLH RS-422 RECEIVER TTL Output Levels VOL VOH 2.4 Input HIGH Threshold +0.2 LOW Threshold –6.0 Common Mode Range –7.0 HIGH Input Current LOW Input Current Receiver Sensitivity Input Impedance 4 Maximum Transmission Rate 5 Propagation Delay tPHL tPLH RS-232 DRIVER TTL Input Level VIL 2.0 VIH Outputs HIGH Level Output +5.0 LOW Level Output –15.0 Open Circuit Voltage –15 Short Circuit Current Power Off Impedance 300 200 200 ns ns 0.8 ±5.0 ±6.0 ±0.4 +3.0 ±150 ±100 60 200 200 Volts Volts Volts Volts Volts Volts mA µA ns Mbps ns ns RL=100Ω |VT| – |VT| VOUT=0V Vcc = 0V, Vout = ±0.25V Rise/fall time, 10%-90% RL=100Ω RL=100Ω RL=100Ω 0.4 +6.0 –0.2 +7.0 ±0.2 Volts Volts Volts Volts Volts Volts kΩ Mbps ns ns (a)-(b) (a)-(b) Refer to graph Refer to graph VCM=+7V to -7V VCM=+10V to -10V 200 200 0.8 +15 –5.0 +15 ±100 Volts Volts Volts Volts Volts mA Ω RL=3kΩ, VIN=0.8V, Vcc = 5V RL=3kΩ, VIN=2.0V, Vcc = 5V VOUT=0V Vcc = 0V, Vout = ±2.0V SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 3 ELECTRICAL CHARACTERISTICS TMIN to TMAX @ Vcc = +5V ±5% unless otherwise noted. MIN. Slew Rate Transition Time Maximum Transmission Rate 120 Propagation Delay tPHL tPLH RS-232 RECEIVER TTL Output Levels VOL VOH 2.4 Input HIGH Threshold LOW Threshold 0.8 Receiver Open Circuit Bias Input Impedance 3 Maximum Transmission Rate 120 Propagation Delay tPHL tPLH RS-423 DRIVER TTL Input Levels VIL VIH 2.0 Output Open Circuit Voltage ±4.0 HIGH Level Output +3.6 LOW Level Output –6.0 Short Circuit Current Power Off Current Transition Time 0.8 Maximum Transmission Rate 120 Propagation Delay tPHL tPLH RS-423 RECEIVER TTL Output Levels VOL VOH 2.4 Input HIGH Threshold +0.2 LOW Threshold –7.0 HIGH Input Current LOW Input Current Receiver Sensitivity Input Impedance 4 Maximum Transmission Rate 120 Propagation Delay tPHL tPLH POWER REQUIREMENTS VCC 4.75 ICC ENVIRONMENTAL AND MECHANICAL Operating Temperature Range 0 Storage Temperature Range –65 ESD Rating TYP. MAX. 30 1.56 8 8 UNITS V/µs µs kbps µs µs CONDITIONS RL=3kΩ, CL=15pF RL=3kΩ, CL=2500pF RL=3kΩ, CL=2500pF RL=3kΩ RL=3kΩ 2 2 0.4 1.7 1.2 5 2.4 +2.0 7 1 1 Volts Volts Volts Volts Volts kΩ kbps µs µs VIN=+15V to -15V 0.8 ±10.0 +6.0 –3.6 ±150 ±100 2.4 2 2 8 8 Volts Volts Volts Volts Volts mA µA µs kbps µs µs RL=550Ω RL=550Ω VOUT=0V Vcc = 0V, Vout = ±0.25V Rise/fall time, 10-90% RL=550Ω RL=550Ω RL=550Ω 0.4 +7.0 –0.2 ±0.2 Volts Volts Volts Volts Volts kΩ kbps µs µs Volts mA °C °C kV Refer to graph Refer to graph VCM = +7V to -7V VIN = +10V to -10V 1 1 5.25 30 +70 +150 1 20 VCC =5V; no interface selected HBM SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 4 RECEIVER INPUT GRAPHS RS-422 RECEIVER +3.25mA RS-423 RECEIVER +3.25mA –10V –3V +3V +10V –10V –3V +3V +10V Maximum Input Current versus Voltage –3.25mA –3.25mA Maximum Input Current versus Voltage RS-485 RECEIVER +1.0mA –7V –3V +6V +12V –0.6mA 1 Unit Load Maximum Input Current versus Voltage POWER MATRIX Typical @ 25°C and Vcc = +5V unless otherwise noted. Input is applied to one driver. Mode Open Input Input to 5V Input to GND AC Signal Input to 5V Input to GND AC Signal to Input with Load with Load with Load Conditions V.35 47.0mA 48.8mA 47.3mA 54.5mA 104.2mA 100.9mA 100.9mA With external termination resistor network; Input @ 60kHz, Load is 3kΩ & 2500pF for RS-232 and 100ý for V.35 Input @ 60kHz Load is 3kΩ & 2500pF for RS-232. RS-232 35.4mA 37.8mA 35.2mA 43.6mA 54.1mA 57.1mA 55.9mA RS-422 25.8mA 31.4mA 25.8mA 27.5mA 140.2mA 135.9mA 145.2mA Input @ 2.5MHz Load is 100Ω. RS-485 33.4mA 37.91mA 33.51mA 34.81mA 200.3mA 194.8mA 203.3mA Input @ 2.5MHz Load is 54Ω. RS-449 37.8mA 40.3mA 41.1mA 42.9mA 142.3mA 138.8mA 147.4mA Input @ 60kHz Load is 100Ω for RS-422 450Ω for RS-423 Input @ 60kHz Load is 100Ω for RS-422 450Ω for RS-423 EIA-530 45.2mA 48.1mA 44.4mA 50.3mA 148.9mA 145.7mA 147.3mA SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 5 OTHER AC CHARACTERISTICS (Typical @ 25°C and nominal supply voltages unless otherwise noted) PARAMETER MIN. TYP. MAX. DELAY TIME FROM ENABLE MODE TO TRI–STATE MODE SINGLE–ENDED MODE (RS-232, RS-423) tPZL; Enable to Output LOW 190 tPZH; Enable to Output HIGH 130 270 tPLZ; Disable from Output LOW tPHZ; Disable from Output HIGH 400 DIFFERENTIAL MODE (RS-422, RS-485, V.35) 100 tPZL; Enable to Output LOW tPZH; Enable to Output HIGH 100 tPLZ; Disable from Output LOW 130 140 tPHZ; Disable from Output HIGH Notes: 1. Measured from 2.5V of RIN to 2.5V of ROUT. 2. Measured from one–half of RIN to 2.5V of ROUT. 3. Measured from 1.5V of TIN to one–half of TOUT. 4. Measured from 2.5V of RO to 0V of A and B. UNITS CONDITIONS ns ns ns ns ns ns ns ns 3kΩ pull–up to output 3kΩ pull–down to output 5V to input GND to input 3kΩ pull–up to output 3kΩ pull–down to output 5V to input GND to input PINOUT… 77 SCT(b) 76 SCT(a) 69 DM(b) 68 DM(a) 71 RD(b) 70 RD(a) 67 CS(b) 66 CS(a) 61 SD(a) 65 TT(b) 63 TT(a) 75 GND 72 GND 64 GND 78 DSR 80 CTS 79 SCT 74 VCC 73 VCC 62 VCC Pin 20 — RxC — Receive Clock; TTL output sourced from RT(a) and RT(b) inputs. Pin 22 — ST — Send Timing; TTL input; source for ST(a) and ST(b) outputs. Pin 37 — RT(a) — Receive Timing; analog input, inverted; source for RxC. Pin 38 — RT(b) — Receive Timing; analog input, non-inverted; source for RxC. Pin 42 — ST(a) — Send Timing; analog output, inverted; sourced from ST. Pin 44 — ST(b) — Send Timing; analog output, non-inverted; sourced from ST. Pin 59 — SD(b) — Analog Out — Send data, non-inverted; sourced from TxD. Pin 61 — SD(a) — Analog Out — Send data, inverted; sourced from TxD. Pin 63 — TT(a) — Analog Out — Terminal Timing, inverted; sourced from TxC Pin 65 — TT(b) — Analog Out — Terminal Timing, non–inverted; sourced from TxC. Pin 70 — RD(a) — Receive Data, analog input; inverted; source for RxD. RxD 1 RDEC0 2 RDEC1 3 RDEC2 4 RDEC3 5 TTEN 6 SCTEN 7 VCC 8 TDEC3 9 TDEC2 10 TDEC1 11 TDEC0 12 DTR 13 TxD 14 TxC 15 RTS 16 RL 17 NC 18 DCD 19 RxC 20 60 GND 59 SD(b) 58 TR(a) 57 GND 56 TR(b) 55 VCC 54 RS(a) 53 GND SP503 52 RS(b) 51 LL(a) 50 GND 49 LL(b) 48 VCC 47 RL(a) 46 GND 45 RL(b) 44 ST(b) 43 GND 42 ST(a) 41 VCC RT(a) 37 RT(b) 38 IC(a) 39 RR(a) 35 STEN 23 PIN ASSIGNMENTS… CLOCK AND DATA GROUP Pin 1 — RxD — Receive Data; TTL output, sourced from RD(a) and RD(b) inputs. Pin 14 — TxD — TTL input ; transmit data source for SD(a) and SD(b) outputs. Pin 15 — TxC — Transmit Clock; TTL input for TT driver outputs. SP503_101_101508 RR(b) 36 GND 29 C1– 30 C2– 31 GND 34 IC(b) 40 RI 21 ST 22 LL 24 VCC 25 C1+ 26 VDD 27 C2+ 28 VCC 33 VSS 32 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 6 Pin 71 — RD(b) — Receive Data; analog input; non-inverted; source for RxD. Pin 76 — SCT(a) — Serial Clock Transmit; analog input, inverted; source for SCT. Pin 77 — SCT(b) — Serial Clock Transmit: analog input, non–inverted; source for SCT Pin 79 — SCT — Serial Clock Transmit; TTL output; sources from SCT(a) and SCT(b) inputs. CONTROL LINE GROUP Pin 13 — DTR — Data Terminal Ready; TTL input; source for TR(a) and TR(b) outputs. Pin 16 — RTS — Ready To Send; TTL input; source for RS(a) and RS(b) outputs. Pin 17 — RL — Remote Loopback; TTL input; source for RL(a) and RL(b) outputs. Pin 19 — DCD— Data Carrier Detect; TTL output; sourced from RR(a) and RR(b) inputs. Pin 21 — RI — Ring In; TTL output; sourced from IC(a) and IC(b) inputs. Pin 24 — LL — Local Loopback; TTL input; source for LL(a) and LL(b) outputs. Pin 35 — RR(a)— Receiver Ready; analog input, inverted; source for DCD. Pin 36 — RR(b)— Receiver Ready; analog input, non-inverted; source for DCD. Pin 39 — IC(a)— Incoming Call; analog input, inverted; source for RI. Pin 40 — IC(b)— Incoming Call; analog input, non-inverted; source for RI. Pin 45 — RL(b) — Remote Loopback; analog output, non-inverted; sourced from RL. Pin 47 — RL(a) — Remote Loopback; analog output inverted; sourced from RL. Pin 49— LL(b) — Local Loopback; analog output, non-inverted; sourced from LL. Pin 51 — LL(a) — Local Loopback; analog output, inverted; sourced from LL. Pin 52 — RS(b) — Ready To Send; analog output, non-inverted; sourced from RTS. Pin 54 — RS(a) — Ready To Send; analog output, inverted; sourced from RTS. Pin 56 — TR(b) — Terminal Ready; analog output, non-inverted; sourced from DTR. Pin 58 — TR(a) — Terminal Ready; analog output, inverted; sourced from DTR. Pin 66 — CS(a)— Clear To Send; analog input, inverted; source for CTS. Pin 67 — CS(b)— Clear To Send; analog input, non-inverted; source for CTS. Pin 68 — DM(a)— Data Mode; analog input, inverted; source for DSR. Pin 69 — DM(b)— Data Mode; analog input, non-inverted; source for DSR Pin 78 — DSR— Data Set Ready; TTL output; sourced from DM(a), DM(b) inputs. Pin 80 — CTS— Clear To Send; TTL output; sourced from CS(a) and CS(b) inputs. CONTROL REGISTERS Pins 2–5 — RDEC0 – RDEC3 — Receiver decode register; configures receiver modes; TTL inputs. Pin 6 — TTEN — Enables TT driver, active low; TTL input. Pin 7 — SCTEN — Enables SCT receiver; active high; TTL input. Pins 12–9 — TDEC0 – TDEC3 — Transmitter decode register; configures transmitter modes; TTL inputs. Pin 23 — STEN — Enables ST driver; active low; TTL input. POWER SUPPLIES Pins 8, 25, 33, 41, 48, 55, 62, 73, 74 — VCC — +5V input. Pins 29, 34, 43, 46, 50, 53, 57, 60, 64, 72, 75 — GND — Ground. Pin 27 — VDD +10V Charge Pump Capacitor — Connects from VDD to VCC. Suggested capacitor size is 22µF, 16V. © Copyright 2008 Exar Corporation SP503_101_101508 SP503 Multiprotocol Transceiver 7 Pin 32 — VSS –10V Charge Pump Capacitor — Connects from ground to VSS. Suggested capacitor size is 22µF, 16V. Pins 26 and 30 — C1+ and C1– — Charge Pump Capacitor — Connects from C1+ to C1–. Suggested capacitor size is 22µF, 16V. Pins 28 and 31 — C2+ and C2– — Charge Pump Capacitor — Connects from C2+ to C2–. Suggested capacitor size is 22µF, 16V. NOTE: NC pins should be left floating; internal signals may be present. pared to older less–efficient designs. The charge pump still requires four external capacitors, but uses a four–phase voltage shifting technique to attain symmetrical 10V power supplies. Figure 3(a) shows the waveform found on the positive side of capcitor C2, and Figure 3(b) shows the negative side of capcitor C2. There is a free– running oscillator that 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 +5V. Cl+ is then switched to ground and the charge on C1– is transferred to C2–. Since C2+ is connected to +5V, the voltage potential across capacitor C2 is now 10V. 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 ground, and transfers the generated –l0V to C3. Simultaneously, the positive side of capacitor C 1 is switched to +5V and the negative side is connected to ground. Phase 3 — VDD charge storage — The third phase of the clock is identical to the first phase — the charge transferred in C1 produces –5V in the negative terminal of C1, which is applied to the negative side of capacitor C2. Since C2+ is at +5V, the voltage potential across C2 is l0V. Phase 4 — VDD transfer — The fourth phase of the clock connects the negative terminal of C2 to ground and transfers the generated l0V across C2 to C4, the VDD storage capacitor. Again, VCC = +5V FEATURES… The SP503 is a highly integrated serial transceiver that allows software control of its interface modes. The SP503 offers hardware interface modes for RS-232 (V.28), RS-422A (V.11), RS-449, RS-485, V.35, and EIA-530. The interface mode selection is done via an 8–bit switch; four (4) bits control the drivers and four (4) bits control the receivers. The SP503 is fabricated using low–power BiCMOS process technology, and incorporates an E xar p atented (5,306,954) charge pump allowing +5V only operation. Each device is packaged in an 80–pin Quad FlatPack package. The SP503 is ideally suited for wide area network connectivity based on the interface modes offered and the driver and receiver configurations. The S P503 h as seven (7) independent drivers and seven (7) independent receivers. The seventh driver of the SP503 allows it to support applications which require two separate clock outputs making it ideal for DCE applications. THEORY OF OPERATION The SP503 is made up of four separate circuit blocks — the charge pump, drivers, receivers, and decoder. Each of these circuit blocks is described in more detail below. +5V C1 + – C4 + – + C2 + – – VDD Storage Capacitor VSS Storage Capacitor Charge–Pump The charge pump is an Exar patented design (5,306,954) and uses a unique approach com- –5V –5V C3 Figure 1. Charge Pump Phase 1. SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 8 VCC = +5V C4 + – + C1 + – C2 + – – VDD Storage Capacitor VSS Storage Capacitor –10V C3 and RS-423 drivers. For the RS-232 driver, the current requirement will be 3.5mA per driver, and for the RS-423 driver, the worst case current drain will be 11mA per driver. The external power supplies should provide a power supply sequence of : +l0V, then +5V, followed by –l0V. Drivers The SP503 has seven (7) independent drivers, two of which have separate active–low tri–state controls. If a half-duplex channel is required, this can be achieved with external connections. Control for the mode selection is done via a four–bit control word. The SP503 does not have a latch; the control word must be externally latched either high or low to write the appropriate code into the SP503. The drivers are prearranged such that for each mode of operation the relative position and functionality of the drivers are set up to accommodate the selected interface mode. As the mode of the drivers is changed, the electrical characteristics will change to support the requirements of clock, data, and control line signal levels. Table 1 shows a summary of the electrical characteristics of the drivers in the different interface modes. Unused driver inputs can be left floating; however, to ensure a desired state with no input signal, pull– up resistors to +5V or pull–down resistors to ground are suggested. Since the driver inputs are both TTL or CMOS compatible, any value resistor less than 100kΩ will suffice. Figure 2. Charge Pump Phase 2. simultaneously with this, the positive side of capacitor C1 is switched to +5V and the negative side is connected to ground, and the cycle begins again. 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. The clock rate for the charge pump typically operates at 15kHz. The external capacitors must be 22µF with a 16V breakdown rating. External Power Supplies For applications that do not require +5V only, external supplies can be applied at the V+ and V– pins. The value of the external supply voltages must be no greater than ±l0V. The current drain for the ±10V supplies is used for RS-232, +10V C2+ GND GND C2– –10V b) a) Figure 3. Charge Pump Waveforms SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 9 VCC = +5V VCC = +5V +5V C1 + – C4 + – + C2 + – – VDD Storage Capacitor VSS Storage Capacitor C1 + – +10V C2 + – C4 + – – + VDD Storage Capacitor VSS Storage Capacitor –5V –5V C3 C3 Figure 4. Charge Pump Phase 3. Figure 5. Charge Pump Phase 4. There are three basic types of driver circuits — RS-232, RS-423, and RS-485. The RS-232 drivers output a minimum of ±5V level single– ended signals (with 3kΩ and 2500pF loading), and can operate up to 120kbps. The RS-232 drivers are used in RS-232 mode for all signals, and also in V.35 mode where they are used as the control line signals. The RS-423 drivers output a minimum of ±3.6V level single–ended signals (with 450Ω loading) and can operate up to 120kbps. Open circuit VOL and VOH measurements may exceed the ±6V limitation of RS-423. The RS-423 drivers are used in RS-449 and EIA-530 modes as RL and LL outputs. The third type of driver supports RS-485, which is a differential signal that can maintain ±1.5V differential output levels with a worst case load of 54Ω. The signal levels and drive capability of the RS-485 drivers allow the drivers to also support RS-422 requirements of ±2V differential output levels with 100Ω loads. The RS-422 drivers are used in RS-449 and EIA-530 modes as clock, data, and some control line signals. The RS-485–type drivers are also used in the V.35 mode. V.35 levels require ±0.55V signals with a load of 100Ω. In order to meet the voltage requirements of V.35, external series resistors with source impedance termination resistors must be implemented to voltage divide the driver outputs from 0 to +5V to 0 to +0.55V. Figure 6 shows the values of the resistor network and how to connect them. The termination network also achieves the 50Ω to 150Ω source impedance for V.35. For applications that require V.11 signals for clock and data instead of V.35 levels, omit the external termination networks. All of the differential drivers, RS-485, RS-422, and V.35 can operate up to 5Mbps. RS-422 0100 RS-422– RS-422+ RS-422– RS-422+ RS-422– RS-422+ RS-422– RS-422+ RS-422– RS-422+ RS-422– RS-422+ RS-422– RS-422+ RS-485 0101 RS-485– RS-485+ RS-485– RS-485+ RS-485– RS-485+ RS-485– RS-485+ RS-485– RS-485+ RS-485– RS-485+ RS-485– RS-485+ RS-449 1100 RS-422– RS-422+ RS-422– RS-422+ RS-422– RS-422+ RS-423 tri–state RS-423 tri–state RS-422– RS-422+ RS-422– RS-422+ EIA-530 1101 RS-422– RS-422+ RS-422– RS-422+ RS-422– RS-422+ RS-423 tri–state RS-423 tri–state RS-422– RS-422+ RS-422– RS-422+ Pin Label TDEC 3–TDEC0 SD(a) SD(b) TR(a) TR(b) RS(a) RS(b) RL(a) RL(b) LL(a) LL(b) ST(a) ST(b) TT(a) TT(b) Mode: 0000 tri–state tri–state tri–state tri–state tri–state tri–state tri–state tri–state tri–state tri–state tri–state tri–state tri–state tri–state RS-232 0010 RS-232 tri–state RS-232 tri–state RS-232 tri–state RS-232 tri–state RS-232 tri–state RS-232 tri–state RS-232 tri–state V.35 1110 V.35– V.35+ RS-232 tri–state RS-232 tri–state RS-232 tri–state RS-232 tri–state V.35– V.35+ V.35– V.35+ Table 1. SP503 Drivers SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 10 +5V, ±5% IN5819 22µF (VCC decoupling) All VCC connections can be tied + 25 + 27 26 22µF + 16V 22µF, 16V together. Charge pump capacitors must be placed as close to the package as possible. 200Ω 232Ω -5V 107Ω VDD C1 + VCC 30 28 22µF + 16V C1– Charge Pump C2 + C2– VSS GND 232Ω 200Ω 200Ω 232Ω -5V V.35 External Driver Output Termination Resistors 107Ω 31 232Ω 200Ω + 22µF, 16V 32 SP503 200Ω 232Ω -5V 232Ω 200Ω 107Ω 1 1 V.35 MODE Control Word 50Ω 120Ω 1 0 Ext. Latch Driver Decode 50Ω V.35 External Receiver Input Termination Resistors 50Ω 120Ω 50Ω 1 1 1 0 Receiver Decode 50Ω 120Ω 50Ω Note: An external voltage of -5V, ±5% is needed for the driver output termination resistors. These V.35 termination resistors comply with all the parameters specified in CCITT Recommendation V.35. For other termination configurations, please consult factory. Figure 6. Typical Operating Circuit SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 11 Receivers The SP503 has seven (7) independent receivers which can be programmed for six (6) different interface modes. One of the seven (7) receivers (SCT) has an active–high enable control, as shown in the Mode Diagrams. Control for the mode selection is done via a 4– bit control word that is independent from the driver control word. The coding for the drivers and receivers is identical. Therefore, if the modes for the drivers and receivers are supposed to be identical in the application, the control lines can be tied together. Like the drivers, the receivers are pre-arranged for the specific requirements of the interface. As the operating mode of the receivers is changed, the electrical characteristics will change to support the requirements of clock, data, and control line receivers. Table 2 shows a summary of the electrical characteristics of the receivers in the different interface modes. Unused receiver inputs can be left floating without causing oscillation. To ensure a desired state of the receiver output, a pull–up resistor of 100kΩ to +5V should be connected to the inverting input for a logic low, or the non–inverting input for a logic high. For single-ended receivers, a pull–down resistor to ground of 5kΩ is internally connected, which will ensure a logic high output. There are three basic types of receivers — RS-232, RS-423, and RS-485. The RS-232 receiver is a single–ended input with a threshold of 0.8V to 2.4V. The RS-232 receiver has an operating voltage range of ±15V and can receive signals up to 120kbps. RS-232 receivers are used in RS-232 mode for all signal types, and in V.35 mode for control line signals. The RS-423 receivers are also single–ended but have an input threshold as low as ±200mV. The input impedance is guaranteed to be greater than 4kΩ, with an operating voltage range of ±7V. The RS-423 receivers can operate up to 120kbps. RS-423 receivers are used for the IC signal in RS-449 and EIA-530 modes, as shown in Table 2. The third type of receiver supports RS-485, which is a differential interface mode. The RS-485 receiver has an input impedance of 15kΩ and a differential threshold of ±200mV. Since the characteristics of an RS-422 receiver are actually subsets of RS-485, the receivers for RS-422 requirements are identical to the RS-485 receivers. RS-422 receivers are used in RS-449 and EIA-530 for receiving clock, data, and some control line signals. The RS-485 receivers are also used for the V.35 mode. V.35 levels require the ±0.55V signals with a load of 100Ω. In order to meet the V.35 input impedance of 100Ω, the external termination network RS-422 0100 RS-422– RS-422+ RS-422– RS-422+ RS-422– RS-422+ RS-422– RS-422+ RS-422– RS-422+ RS-422– RS-422+ RS-422– RS-422+ RS-485 0101 RS-485– RS-485+ RS-485– RS-485+ RS-485– RS-485+ RS-485– RS-485+ RS-485– RS-485+ RS-485– RS-485+ RS-485– RS-485+ RS-449 1100 RS-422– RS-422+ RS-422– RS-422+ RS-422– RS-422+ RS-422– RS-422+ RS-422– RS-422+ RS-423 15k Ω to GND RS-422– RS-422+ EIA-530 1101 RS-422– RS-422+ RS-422– RS-422+ RS-422– RS-422+ RS-422– RS-422+ RS-422– RS-422+ RS-423 15k Ω to GND RS-422– RS-422+ Pin Label RDEC3–RDEC0 RD(a) RD(b) RT(a) RT(b) CS(a) CS(b) DM(a) DM(b) RR(a) RR(b) IC(a) IC(b) SCT(a) SCT(b) Mode: 0000 Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined RS-232 0010 RS-232 15k Ω to GND RS-232 15k Ω to GND RS-232 15k Ω to GND RS-232 15k Ω to GND RS-232 15k Ω to GND RS-232 15k Ω to GND RS-232 15k Ω to GND V.35 1110 V.35– V.35+ V.35– V.35+ RS-232 15k Ω to GND RS-232 15k Ω to GND RS-232 15k Ω to GND RS-232 15k Ω to GND V.35– V.35+ Table 2. SP503 Receivers SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 12 of Figure 6 must be applied. The threshold of the V.35 receiver is ±200mV. The V.35 receivers can operate up to 5Mbps. All of the differential receivers can receive data up to 5Mbps. Decoder The SP503 has the ability to change the interface mode of the drivers or receivers via an 8– bit switch. The decoder for the drivers and receivers is not latched; it is merely a combinational logic switch. The codes shown in Tables 1 and 2 are the only specified, valid modes for the SP503. Undefined codes may represent other interface modes not specified or random outputs (consult the factory for more information). The drivers are controlled with the data bits labeled TDEC3–TDEC0. The drivers can be put into tri-state mode by writing 0000 to the driver decode switch. The receivers are controlled with data bits RDEC3–RDEC0; the code 0000 written to the receivers will place the outputs in an undetermined state. All receivers, with the exception of SCT, do not have tri-state capability; the outputs will either be HIGH or LOWdepending upon the state of the receiver input. SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 13 MODE: RS-232 DRIVER RECEIVER TDEC3 TDEC2 TDEC1 TDEC0 RDEC3 RDEC2 RDEC1 RDEC0 0 0 1 0 0 0 1 0 RD(a) 70 RxD 1 RT(a) 37 RxC 20 CS(a) 66 CTS 80 DM(a) 68 DSR 78 RR(a) 35 DCD 19 IC(a) 39 RI 21 SCT(a) 76 SCT 79 SCTEN 7 14 TxD 61 SD(a) 13 DTR 58 TR(a) 16 RTS 54 RS(a) 17 RL 47 RL(a) 24 LL 51 LL(a) 22 ST 42 ST(a) 23 STEN 15 TxC 63 TT(a) 6 TTEN RECEIVERS DRIVERS STEN 1 0 ST Disabled Enabled TTEN TT SCTEN 1 Disabled 1 0 Enabled 0 SCT Enabled Disabled Figure 7. Mode Diagram — RS-232 SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 14 MODE: V.35 DRIVER RECEIVER TDEC3 TDEC2 TDEC1 TDEC0 RDEC3 RDEC2 RDEC1 RDEC0 1 1 1 0 1 1 1 0 RD(a) 70 RxD 1 RD(b) 71 RT(a) 37 RxC 20 RT(b) 38 CS(a) 66 CTS 80 DM(a) 68 DSR 78 RR(a) 35 DCD 19 IC(a) 39 RI 21 SCT(a) 76 15 TxC SCT 79 SCTEN 7 SCT(b) 77 63 TT(a) 65 TT(b) 6 TTEN 14 TxD 61 SD(a) 59 SD(b) 13 DTR 58 TR(a) 16 RTS 54 RS(a) 17 RL 47 RL(a) 24 LL 51 LL(a) 22 ST 42 ST(a) 44 ST(b) 23 STEN RECEIVERS DRIVERS STEN 1 0 ST Disabled Enabled TTEN TT SCTEN 1 Disabled 1 0 Enabled 0 SCT Enabled Disabled Figure 8. Mode Diagram — V.35 SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 15 MODE: RS-422 DRIVER RECEIVER TDEC3 TDEC2 TDEC1 TDEC0 RDEC3 RDEC2 RDEC1 RDEC0 0 1 0 0 0 1 0 0 RD(a) 70 RxD 1 RD(b) 71 RT(a) 37 RxC 20 RT(b) 38 CS(a) 66 CTS 80 CS(b) 67 DM(a) 68 DSR 78 DM (b) 69 RR(a) 35 DCD 19 RR(b) 36 IC(a) 39 RI 21 IC(b) 40 SCT(a) 76 SCT 79 SCTEN 7 SCT(b) 77 17 RL 47 RL(a) 45 RL(b) 24 LL 51 LL(a) 49 LL(b) 22 ST 42 ST(a) 44 ST(b) 23 STEN 15 TxC 63 TT(a) 65 TT(b) 6 TTEN 14 TxD 61 SD(a) 59 SD(b) 13 DTR 58 TR(a) 56 TR(b) 16 RTS 54 RS(a) 52 RS(b) RECEIVERS DRIVERS STEN 1 0 ST Disabled Enabled TTEN TT SCTEN 1 Disabled 1 0 Enabled 0 SCT Enabled Disabled Figure 9. Mode Diagram — RS-422 SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 16 MODE: RS-449 DRIVER RECEIVER TDEC3 TDEC2 TDEC1 TDEC0 RDEC3 RDEC2 RDEC1 RDEC0 1 1 0 0 1 1 0 0 RD(a) 70 RxD 1 RD(b) 71 RT(a) 37 RxC 20 RT(b) 38 CS(a) 66 CTS 80 CS(b) 67 DM(a) 68 DSR 78 DM (b) 69 RR(a) 35 DCD 19 RR(b) 36 IC(a) 39 RI 21 SCT(a) 76 SCT 79 SCTEN 7 SCT(b) 77 22 ST 42 ST(a) 44 ST(b) 23 STEN 15 TxC 63 TT(a) 65 TT(b) 6 TTEN 47 RL(a) 24 LL 51 LL(a) 14 TxD 61 SD(a) 59 SD(b) 13 DTR 58 TR(a) 56 TR(b) 16 RTS 54 RS(a) 52 RS(b) 17 RL RECEIVERS DRIVERS STEN 1 0 ST Disabled Enabled TTEN TT SCTEN 1 Disabled 1 0 Enabled 0 SCT Enabled Disabled Figure 10. Mode Diagram — RS-449 SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 17 MODE: RS-485 DRIVER RECEIVER TDEC3 TDEC2 TDEC1 TDEC0 RDEC3 RDEC2 RDEC1 RDEC0 0 1 0 1 0 1 0 1 RD(a) 70 RxD 1 RD(b) 71 RT(a) 37 RxC 20 RT(b) 38 CS(a) 66 CTS 80 CS(b) 67 DM(a) 68 DSR 78 DM (b) 69 RR(a) 35 DCD 19 RR(b) 36 IC(a) 39 RI 21 IC(b) 40 SCT(a) 76 SCT 79 SCTEN 7 SCT(b) 77 17 RL 47 RL(a) 45 RL(b) 24 LL 51 LL(a) 49 LL(b) 22 ST 42 ST(a) 44 ST(b) 23 STEN 15 TxC 63 TT(a) 65 TT(b) 6 TTEN 14 TxD 61 SD(a) 59 SD(b) 13 DTR 58 TR(a) 56 TR(b) 16 RTS 54 RS(a) 52 RS(b) RECEIVERS DRIVERS STEN 1 0 ST Disabled Enabled TTEN TT SCTEN 1 Disabled 1 0 Enabled 0 SCT Enabled Disabled Figure 11. Mode Diagram — RS-485 SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 18 MODE: EIA-530 DRIVER RECEIVER TDEC3 TDEC2 TDEC1 TDEC0 RDEC3 RDEC2 RDEC1 RDEC0 1 1 0 1 1 1 0 1 RD(a) 70 RxD 1 RD(b) 71 RT(a) 37 RxC 20 RT(b) 38 CS(a) 66 CTS 80 CS(b) 67 DM(a) 68 DSR 78 DM (b) 69 RR(a) 35 DCD 19 RR(b) 36 IC(a) 39 RI 21 SCT(a) 76 SCT 79 SCTEN 7 SCT(b) 77 22 ST 42 ST(a) 44 ST(b) 23 STEN 15 TxC 63 TT(a) 65 TT(b) 6 TTEN 47 RL(a) 24 LL 51 LL(a) 14 TxD 61 SD(a) 59 SD(b) 13 DTR 58 TR(a) 56 TR(b) 16 RTS 54 RS(a) 52 RS(b) 17 RL RECEIVERS DRIVERS STEN 1 0 ST Disabled Enabled TTEN TT SCTEN 1 Disabled 1 0 Enabled 0 SCT Enabled Disabled Figure 12. Mode Diagram — EIA-530 SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 19 SP502/SP503 EVALUATION BOARD The SP502/SP503 Evaluation Board (EB) Is designed to offer as much flexibility to the user as possible. Each board comes equipped with an 80-pin QFP Zero-Insertion Force socket to allow for testing of multiple devices. The control lines and inputs and outputs of the device can be controlled either manually or via a data bus under software control. There is a 50-pin connector to allow for easy connection to an existing system via a ribbon cable. There are also open areas on the PC board to add additional circuitry to support application-specific requirements. Manual Control The SP502/SP503EB will support both the SP502 or SP503 multi-mode serial transceivers. When used for the SP502, disregard all notation on the board that is in [brackets] . The SP502 has a half-duplex connection between the RxT receiver and the TT driver. Due to this internal connection, the RxT receiver inputs can be accessed via the TT(a) and TT(b) pins. If the user needs separate receiver input test pins, jumpers JP1 and JP2 can be inserted to allow for separate receiver inputs located at SCT(a) and SCT(b). The corresponding TTL output for this receiver is labeled as SCT. This test point is tied to pin 79 of the SP502 or SP503. Pin 7 of the evaluation board is connected to the DIP switch, and is labeled as (SCTEN). When used with the SP502, this pin should be switched to a low state. When the evaluation board is used with the SP503, pin 7 is a tri-state control pin for the SCT receiver. The transceiver I/O lines are brought out to test pins arranged in the same configuration as shown elsewhere in this data sheet. A top layer silk-screen shows the drivers and receivers to allow direct correlation to the data sheet. The transmitter and receiver decode bits are tied together and are brought out to a DIP switch for manual control of both the driver and receiver interface modes. Since the coding for the drivers and receivers is identical, the bits have been tied together. The DIP switch has 7 positions, four of which are reserved for the TDEC/RDEC control and the other three are used as tri-state control pins. The labels that are in [brackets] apply only to the SP503. If a logic one is asserted, the corresponding red LED will be lit. If a zero is asserted, the corresponding red LED will not be lit. Software Control A 50-pin connector brings all the analog and digital I/O lines, VCC, and GND to the edge of the card. This can be wired to the user’s existing design via a ribbon cable. The pinout for the connector is described in the following section. When the evaluation board is operated under software control, the DlP switch should be set up so that all bits are LOW (all LEDs off). This will tie 20kΩ pulldown resistors from the inputs to ground and let the external system control the state of the control inputs. Power and Ground Requirements The evaluation board layout has been optimized for performance by using basic analog circuit techniques, The four charge-pump capacitors must be 22µF (16V) and be placed as close to the unit as possible; tantalum capacitors are suggested. The decoupling capacitor must be a minimum of 1µF; depending upon the operating environment, 10µF should be enough for worst case situations. The ground plane for the part must be solid, extending completely under the package. The power supplies for the device should be as accurate as possible; for rated performance ±5% is necessary. The power supply current will vary depending upon the selected mode, the amount of loading and the data rate. As a maximum, the user should reserve 200mA for ICC. The worst-case operating mode is RS-485 under full load of six (6) drivers supplying 1.6V to 54Ω loads. The power and ground inputs can be supplied through either the banana jacks on the evaluation board (Red = VCC = +5V±5%; Black = GND) or through the connector. For reference, the 80-pin QFP Socket is a TESCO part number FPQ-80-65-09A. The 50-pin connector is an AMP part number 749075-5. SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 20 Figure 13. SP502/503 Evaluation Board Schematic SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 21 Figure 14a. Evaluation Board — Top Layers SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 22 Figure 14b. Evaluation Board — Bottom Layers SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 23 Figure 15. External Transient Suppressors SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 24 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 EDGE CONNECTOR 01 DUT PIN DESCRIPTIONS EDGE CONNECTOR 13 14 l5 16 17 18 DUT PIN DESCRIPTIONS TxD (pin 14) –TTL Input – Transmit data; source for SD(a) and SD(b) outputs. DTR (pin 13) – TTL Input – Data terminal ready: source for TR(a) and TR(b) outputs. ST/TT (pin 6) –TTL Input – ST/TT select pin; enables ST drivers and disables TT drivers when high. Disables ST drivers and enables TT drivers when low. DEC3/RDEC3 (pin 5) – TTL Input – Transmitter/Receiver decode register. TDEC2/RDEC2 (pin 4) – TTL Input – Transmitter/Receiver decode register. TDEC1/RDEC1 (pin 3) – TTL Input – Transmitter/Receiver decode register. TDEC0/RDEC0 (pin 2) – TTL Input – Transmitter/Receiver decode register. RxD (pin 1 ) – TTL Output – Receive data; sourced from RD(a) and RD)b) inputs. CTS (pin 80) – TTL Output – Clear to send; sourced from CS(a) and CS(b) inputs. RxT (pin 79) – TTL Output – RxT; sourced from TT(a), TT(b) inputs. DSR (pin 78) – TTL Output – Data set ready; sourced from DM(a) and DM(b) inputs. RD(b) (pin 71) – Analog In – Receive data, non–inverted; source for RxD. RD(a) (pin 70) – Analog In – Receive data, inverted: source for RxD. DM(b) (pin 69) – Analog In – Data mode, non–inverted; source for DSR. DM(a) (pin 68) – Analog In – Data mode, inverted; source for DSR. CS(b) (pin 67) – Analog In – Clear to send; non–inverted; source for CTS. CS(a) (pin 66) – Analog In – Clear to send, inverted; source for CTS. TT(b) (pin 65) – Analog Out – Terminal timing, non–inverted: sourced from TxC input. TT(a) (pin 63) – Analog Out – Terminal timing; inverted: sourced from TxC input. TR(a) (pin 58) – Analog Out – Terminal ready, inverted; sourced from DTR. TR(b) (pin 56) – Analog Out – Terminal ready; non–inverted; sourced from DTR. SD(a) (pin 61) – Analog Out – Send data, inverted; sourced from TxD. SD(b) (pin 59) – Analog Out – Send data; non–inverted; sourced from TxD. RS(a) (pin 54) – Analog Out – Ready to send; inverted; sourced from RTS. RS(b) (pin 52) – Analog Out – Ready to send, non–inverted; sourced from RTS. 02 03 04 05 06 07 08 19 20 21 09 22 23 24 25 10 11 12 SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 25 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 EDGE CONNECTOR 26 DUT PIN DESCRIPTIONS EDGE CONNECTOR 39 40 41 42 43 44 DUT PIN DESCRIPTIONS ST (pin 22) – TTL Input – Send Timing; source for ST(a) and ST(b) outputs. SP503 only. STEN (pin 23) – TTL Input — Driver enable control pin; active low. SP503 only, SCT(a) (pin 76) – Analog Input – Inverting; input for SCT receiver; SP503 only. SCT(b) (pin 77) – Analog Input – Non– inverting; input for SCT receiver. SP503 only. VCC — +5V for all circuitry. GND — signal and power ground. IC(a) (pin 39) – Analog In – Incoming call; inverted; source for Rl. RT(b) (pin 38) – Analog In – Receive timing, non–inverted; source for RxC. RT(a) (pin 37) – Analog In – Receive timing; inverted; source from RxC. RR(b) (pin 36) – Analog In – Receiver ready; non–inverted; source for DCD. RR(a) (pin 35) – Analog In – Receiver ready; inverted; source for DCD. LL (pin 24) – TTL Input – Local loopback; source for LL(a) and LL(b) outputs. Rl (pin 21) – TTL Output – Ring indicator; sourced from IC(a) and IC(b) inputs. RxC (pin 20) – TTL Output – Receive clock; sourced from RT(a) and RT(b) inputs. DCD (pin 19) – TTL Output – Data carrier detect; sourced from RR(a) and RR(b) inputs. RL (pin 17) – Analog Out – Remote loopback; source for RL(a) and RL(b) outputs. RTS (pin 16) – TTL Input – Ready to send; source for RS(a) and RS(b) outputs. TxC (pin 15) – TTL Input – Transmit clock; source for TT(A) and TT(B) outputs. 27 28 29 30 31 45 32 LL(a) (pin 51) – Analog Out – Local loopback, inverted; sourced from LL. 33 LL(b) (pin 49) – Analog Out – Local loopback, non–inverted sourced from LL. RL(a) (pin 47) – Analog Out – Remote loopback; inverted; sourced from RL. RL(b) (pin 45) – Analog Out – Remote loopback; non–inverted; sourced from RL. ST(b) (pin 44) – Analog Out – Send timing, non–inverted; sourced from TxC. ST(a) (pin 42) – Analog Output –Send timing, inverted; sourced from TxC. IC(b) (pin 40) – Analog In – Incoming call; non–inverted; source for Rl. 46 34 35 47 48 36 49 37 38 50 SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 26 SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 27 ORDERING INFORMATION Part Number Top Mark Temperature Range Package Types SP503CM-L ........ SP503CMYYWW......0°C to +70°C ............................. 80–pin JEDEC (MS-022 BC) LQFP SP503EM-L.........SP503EMYYWW......-20°C to +85°C ........................ 80–pin JEDEC (MS-022 BC) LQFP REVISION HISTORY DATE 1/27/04 5/6/04 7/29/04 6/8/05 REVISION A B C D DESCRIPTION Implemented tracking revision. Added Top Mark to ordering information. Included LQFP package option. Note that the SP503 Evaluation Board is no longer available. The information is still included as reference material should customers desire to breadboard their own evaluation setup. SP503 is no longer available in MQFP package per PCN 07-110206a. In addition, SP503 is now only available in Pb-Free, RoHS compliant packages. New package drawing has been included and ordering information has been updated. Changed to Exar datasheet format and revision to 1.0.0. SP503EM-L temperature range changed from "-40°C to +85°C" to "-20°C to +85°C". Added ESD rating of 1kV HBM to electrical characteristics. 7/17/08 1.0.0 10/15/08 1.0.1 NOTICE EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained here in are only for illustration purposes and may vary depending upon a user’s specific application. While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in 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 EXAR Corporation is adequately protected under the circumstances. Copyright 2008 EXAR Corporation Datasheet September 2008 Send your technical inquiry with details to: uarttechsupport@exar.com Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited. SP503_101_101508 SP503 Multiprotocol Transceiver © Copyright 2008 Exar Corporation 28