SP522

® SP522/SP524 Low-Cost Programmable Multi-Protocol Transceivers ■ SP522 — 2 Drivers and 2 Receivers ■ SP524 — 4 Drivers and 4 Receivers ■ Driver and Receiver Tri-State Control ■ Low-Cost WAN Solution ■ Loopback Function for Diagnostics ■ Software Selectable Interface Modes: -RS-232 (V.28), RS-423 (V.10) -RS-422 (V.11, X.21), RS-485 DESCRIPTION The SP522/524 is a monolithic device that supports three serial interface standards for Wide Area Network Connectivity. The SP522/524 is ideally suited for multi-protocol designs that are cost and space sensitive. The SP522/524 is fabricated using a low power BiCMOS process technology. Two (2) drivers and two (2) receivers for the SP522 can be configured via software for any of the above interface modes at any time. The SP524 offers two (2) additional drivers and two (2) additional receivers. VDD IN5819 +5V VDD 1N5819 +5V 10µF 10µF VSS VSS 10µF 10µF + + 10µF 28 VDD 2 VCC 14 19 29 VSS VCC VCC 10µF 31 DP0 32 DP1 SP524 LATCH_EN 30 DECODER LOGIC LOOPBCK 23 21 VDD 13 VCC 22 VSS SP522 8 DP0 7 DP1 DECODER LOGIC LATCH_EN 2 LOOPBCK 23 24 T1IN 36 ENT1 25 T2IN 35 ENT2 44 R1OUT 40 ENR1 43 R2OUT 39 ENR2 T1 T1OUTA 22 T1OUTB 20 T2OUTA 18 T2OUTB 17 R1INA 3 R1INB 4 R2INA 5 R2INB 6 T2 R1 10 T1IN 6 ENT1 9 T2IN 4 ENT2 1 R1OUT 5 ENR1 24 R2OUT 3 ENR2 T1 T1OUTA 11 T1OUTB 12 T2OUTA 15 T2OUTB 16 R1INA 18 R1INB 17 R2INA 20 R2INB 19 R2 LOOPBACK PATHS T2 LOOPBACK PATHS 26 T3IN 34 ENT3 27 T4IN 33 ENT4 42 R3OUT 38 ENR3 41 R4OUT 37 ENR4 GND T3 T3OUTA 16 T3OUTB 15 T4OUTA 13 T4OUTB 11 R3INA 7 R3INB 8 R4INA 9 R4INB 10 GND 21 T4 R1 R3 R2 R4 14 GND 12 GND 1 Rev. 7/10/03 SP522 Multi–Mode Serial Transceivers © Copyright 2003 Sipex Corporation 1 LOOPBACK PATHS SPECIFICATIONS Typical @ 25°C and nominal supply voltages unless otherwise noted. MIN. LOGIC INPUTS VIL VIH LOGIC OUTPUTS VOL VOH RS422 DRIVER TTL Input Levels VIL VIH Outputs Differential Output Open Circuit Voltage,VO Balance Offset Short Circuit Current Power Off Current Transition Time Max. Transmission Rate Propagation Delay tPHL tPLH RS422 RECEIVER TTL Output Levels VOL VOH Input High Threshold Low Threshold Common Mode Range High Input Current Low Input Current Receiver Sensitivity Input Impedance Max. Transmission Rate Propagation Delay tPHL tPLH RS485 DRIVER TTL Input Levels VIL VIH Outputs Differential Output Open Circuit Voltage,VO Balance Output Current Short Circuit Current Transition Time Max. Transmission Rate Propagation Delay tPHL tPLH TYP. MAX. 0.8 UNITS Volts Volts Volts Volts CONDITIONS 2.0 0.4 2.4 IOUT = –3.2mA IOUT = 1.0mA 0 2.0 +2.0 0.8 +5.0 +6.0 +0.4 +3.0 +150 +100 40 90 90 150 150 Volts Volts Volts Volts Volts Volts mA µA nS Mbps nS nS R=50Ω; see Figure 1 |VT| – |VT| Vout = 0V Vcc = 0V, Vout = +0.25V Rise/fall time, 10%-90% RL=100Ω TA = +25°C RDIFF=100Ω, Figures 3 & 5 RDIFF=100Ω, Figures 3 & 5 10 0.4 2.4 +0.3 -6.0 -7.0 +6.0 -0.3 +7.0 +0.3 4 10 110 110 175 175 Volts Volts Volts Volts Volts Volts kΩ Mbps nS nS (a)-(b) (a)-(b) Refer to Rec. input graph Refer to Rec. input graph VCM = +7V to -7V TA = +25°C Figures 3 & 7 Figures 3 & 7 0.8 2.0 +1.5 28.0 +200 40 10 100 100 150 150 +5.0 +6.0 +0.2 Volts Volts Volts Volts Volts mA mA nS Mbps nS nS R=27Ω; CL=50pF; see Fig. 1 |VT| – |VT| RL=54Ω Vout = –7V to +7V Rise/fall time, 10%-90% RL=54Ω Figures 3 & 5; TA = +25°C RDIFF=54Ω, CRL = 50pF RDIFF=54Ω, CRL = 50pF Rev. 7/10/03 SP522 Multi–Mode Serial Transceivers © Copyright 2003 Sipex Corporation 2 SPECIFICATIONS Typical @ 25°C and nominal supply voltages unless otherwise noted. MIN. RS485 RECEIVER TTL Output Levels VOL VOH Input Common Mode Range High Input Current Low Input Current Receiver Sensitivity Input Impedance Max. Transmission Rate Propagation Delay tPHL tPLH RS232 DRIVER TTL Input Level VIL VIH Outputs High Level Output Low Level Output Open Circuit Voltage Short Circuit Current Power Off Impedance Slew Rate Transition Time Max. Transmission Rate Propagation Delay tPHL tPLH RS232 RECEIVER TTL Output Levels VOL VOH Input High Threshold Low Threshold Receiver Open Circuit Bias Input Impedance Max. Transmission Rate Propagation Delay tPHL tPLH RS423 DRIVER TTL Input Levels VIL VIH Output High Level Output Low Level Output Open Circuit Voltage Short Circuit Current TYP. MAX. UNITS CONDITIONS 0.4 2.4 -7.0 ±0.1 12 10 110 110 175 175 +12.0 Volts Volts Volts Volts kΩ Mbps nS nS Refer to Rec. input graph Refer to Rec. input graph VCM = +12V to -7V VCM = +12V to -7V TA = +25°C Figures 3 & 7 Figures 3 & 7 0.8 2.0 +5.0 -15.0 -15 300 30 1.5 120 2 2 8 8 +15 -5.0 +15 +100 Volts Volts Volts Volts Volts mA Ω V/µs µs Kbps µS µS RL=3KΩ, VIN=0.8V RL=3KΩ, VIN=2.0V Vout = 0V Vcc = 0V, Vout = ±2.0V RL=3KΩ, CL=50pF, between +3V to –3V RL=3KΩ, CL=2500pF RL=3KΩ, CL=2500pF TA = +25°C RL=3KΩ RL=3KΩ 0.4 2.4 0.8 3 120 1.7 1.2 5 0.2 0.2 3.0 +2.0 7 1 1 Volts Volts Volts Volts Volts KΩ Kbps µS µS TA = +25°C 0.8 2.0 +3.6 -6.0 +4.0 +6.0 -3.6 +6.0 +150 Volts Volts Volts Volts Volts mA VDD = +5V, VSS = –5V RL=450Ω, VT = 0.9*VOC RL=450Ω, VT = 0.9*VOC VOUT = 0V Rev. 7/10/03 SP522 Multi–Mode Serial Transceivers © Copyright 2003 Sipex Corporation 3 SPECIFICATIONS (Continued) Typical @ 25°C and nominal supply voltages unless otherwise noted. MIN. TYP. MAX. UNITS RS-423 DRIVER Power Off Current ±100 µA Transition Time 1.0 µs Max. Transmission Rate 120 Kbps Propagation Delay tPHL 2 8 µS tPLH 2 8 µS RS423 RECEIVER TTL Output Levels VOL 0 0.4 Volts VOH 2.4 Volts Input High Threshold +0.3 +7.0 Volts Low Threshold -7.0 -0.3 Volts Common Mode Range -7.0 +7.0 Volts High Input Current Low Input Current Receiver Sensitivity +0.3 Volts Input Impedance 4 KΩ Max. Transmission Rate 120 Kbps Propagation Delay tPHL 0.5 1 µS tPLH 0.5 1 µS POWER REQUIREMENTS VCC +4.75 +5.0 +5.25 Volts VDD +9.5 +10.0 +10.5 Volts VSS -9.5 -10.0 -10.5 Volts ICC 4 mA IDD 10 mA ISS 10 mA ENVIRONMENTAL AND MECHANICAL Operating Temperature Range 0 +70 °C Storage Temperature Range -65 +150 °C Package 24-pin SOIC, 24-pin SSOP, 44–pin QFP CONDITIONS VCC = 0V, VOUT= +0.25V Rise/fall time, 10-90% RL=450Ω TA = +25°C RL=450Ω RL=450Ω Refer to Rec. input graph Refer to Rec. input graph VCM = +7V to -7V VIN = +10V to -10V TA = +25°C VCC = +5V; DP0=DP1=0V VDD = +10V; DP0=DP1=0V VSS = –10V; DP0=DP1=0V RECEIVER INPUT GRAPHS V.11 RECEIVER +3.25mA RS485 RECEIVER +1.0mA V.10 RECEIVER +3.25mA –10V –3V +3V +10V –7V –3V +6V +12V –10V –3V +3V +10V Maximum Input Current versus Voltage –3.25mA –0.6mA 1 Unit Load Maximum Input Current versus Voltage Maximum Input Current versus Voltage –3.25mA Rev. 7/10/03 SP522 Multi–Mode Serial Transceivers © Copyright 2003 Sipex Corporation 4 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 VDD........................................................................+12V VSS..........................................................................–12V Input Voltages Logic...............................-0.5V to (VCC+0.5V) Drivers............................-0.5V to (VCC+0.5V) Receivers..........................±30V@≤100mA Outputs Voltages Logic................................-0.5V to (VCC+0.5V) Drivers................................................+15V Receivers........................-0.5V to (VCC+0.5V) Storage Temperature..........................-65˚C to +150˚C Power Dissipation.........................................2000mW OTHER AC CHARACTERISTICS (Typical @ 25°C and nominal supply voltages unless otherwise noted) PARAMETER MIN. TYP. MAX. UNITS DRIVER DELAY TIME FROM ENABLE MODE TO TRI–STATE MODE SINGLE–ENDED MODE (RS-232, RS-423) tPZL; Enable to Output low 600 ns tPZH; Enable to Output high 300 ns tPLZ; Disable from Output low 300 ns tPHZ; Disable from Output high 900 ns DIFFERENTIAL MODE (RS-422, RS-485) tPZL; Enable to Output low 100 ns tPZH; Enable to Output high tPLZ; Disable from Output low tPHZ; Disable from Output high 120 100 160 ns ns ns CONDITIONS 3KΩ pull–up to output 3KΩ pull–down to output 5V to input GND to input CL = 100pF, Fig. 4 & 6; S1 closed CL = 100pF, Fig. 4 & 6; S2 closed CL = 15pF, Fig. 4 & 6; S1 closed CL = 15pF, Fig. 4 & 6; S2 closed RECEIVER DELAY TIME FROM ENABLE MODE TO TRI–STATE MODE SINGLE–ENDED MODE (RS-232, RS-423) tPZL; Enable to Output low 125 ns tPZH; Enable to Output high 120 ns tPLZ; Disable from Output low 90 ns tPHZ; Disable from Output high 90 ns DIFFERENTIAL MODE (RS-422, RS-485) tPZL; Enable to Output low 125 ns tPZH; Enable to Output high tPLZ; Disable from Output low tPHZ; Disable from Output high 120 90 90 ns ns ns 3KΩ pull–up to output 3KΩ pull–down to output 5V to input GND to input CRL = 15pF, Fig. 2 & 8; S1 closed CRL = 15pF, Fig. 2 & 8; S2 closed CRL = 15pF, Fig. 2 & 8; S1 closed CRL = 15pF, Fig. 2 & 8; S2 closed Rev. 7/10/03 SP522 Multi–Mode Serial Transceivers © Copyright 2003 Sipex Corporation 5 A R VOD R B VOC Receiver Output CRL Test Point S1 1K S2 1K VCC Figure 1. Driver DC Test Load Circuit Figure 2. Receiver Timing Test Load Circuit 3V DE DI A B CL2 RDIFF CL1 A RO B 15pF Output Under Test 500 CL S1 VCC S2 Figure 3. Driver/Receiver Timing Test Circuit Figure 4. Driver Timing Test Load #2 Circuit +3V DRIVER INPUT 0V A DRIVER OUTPUT B f = 1MHz; tR < 10ns; tF < 10ns 1.5V tPLH VO 1/2VO tSKEW tPHL 1/2VO tSKEW 1.5V DIFFERENTIAL VO+ OUTPUT 0V VA – VB VO– tF tR Figure 5. Driver Propagation Delays Rev. 7/10/03 SP522 Multi–Mode Serial Transceivers © Copyright 2003 Sipex Corporation 6 +3V DE 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 6. Driver Enable and Disable Times VOD2+ A–B VOD2– VOH RECEIVER OUT VOL f = 1MHz; tR ≤ 10ns; tF ≤ 10ns 0V INPUT 0V 1.5V tPHL OUTPUT tPLH 1.5V Figure 7. Receiver Propagation Delays +3V RE 0V 5V R VIL VIH R 0V 1.5V tZH Output normally HIGH 1.5V Output normally LOW 0.5V 0.5V tHZ 1.5V f = 1MHz; t < 10ns; t < 10ns R F tZL 1.5V tLZ Figure 8. Receiver Enable and Disable Times Rev. 7/10/03 SP522 Multi–Mode Serial Transceivers © Copyright 2003 Sipex Corporation 7 PINOUT (24-PIN SOIC & SSOP) R1OUT 1 LATCH_EN 2 ENR2 3 ENT2 4 ENR1 5 ENT1 6 DP1 7 DP0 8 T2IN 9 T1IN 10 T1OUTA 11 T1OUTB 12 SP522 24 23 22 21 20 19 18 17 16 15 14 13 R2OUT LOOPBCK VSS VDD R2INA R2INB R1INA R1INB T2OUTB T2OUTA GND VCC PINOUT (44-PIN QFP) R1OUT R2OUT R3OUT R4OUT ENR1 ENR2 ENR3 ENR4 ENT1 ENT2 ENT3 GND VCC R1INA R1INB R2INA R2INB R3INA R3INB R4INA R4INB T4OUTB 1 2 3 4 5 6 7 8 9 10 11 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 SP524 ENT4 DP1 DP0 LATCH_EN VSS VDD TIN4 TIN3 TIN2 TIN1 LOOPBCK Rev. 7/10/03 GND T4OUTA VCC T3OUTB T3OUTA T2OUTB T2OUTA VCC T1OUTB GND T1OUTA SP522 Multi–Mode Serial Transceivers 12 13 14 15 16 17 18 19 20 21 22 © Copyright 2003 Sipex Corporation 8 FEATURES The SP522 and SP524 is a highly integrated serial transceiver that offers programmability between interface modes through software control. The SP522 and SP524 offers the hardware interface modes for RS-232 (V.28), RS-422A (V.11), RS-423 (V.10), and RS-485. The interface mode selection is done via two control pins. The SP522 contains two (2) independent drivers and two (2) independent receivers. The SP524 is basically two SP522 functions on one silicon, thus having four (4) drivers and four (4) receivers. The SP522/SP524 is ideally suited for low-cost wide area network connectivity and other multiprotocol applications. Based on our previous multi-mode SP500 family, Sipex has allocated specific transceiver cells or "building blocks" from the SP503 and created the SP522. The "building block" concept is that these small transceiver cells can be packaged to offer a simple low-cost solution to networking applications that need only two to four interface modes. The SP522 can be connected in series to build multiple channels needed for the specific application. S ipex h as conveniently doubled the SP522 transceiver cell into the SP524 on a single silicon. For example in a 8channel application requiring eight transceivers, the design can be implemented using two SP524 devices. The SP522 and SP524 can also be implemented in series with our SP500 family. An application needing 9-channels can use the SP504 containing seven (7) transceivers with the SP522. THEORY OF OPERATION The SP522 and SP524 are simply made up of the drivers, receivers, and decoder. The devices operate on three (3) power supplies; VCC at +5V, VDD at +10V , and VSS at –10V. Each of these circuit blocks are described in more detail below. Drivers The SP522 has two (2) enhanced independent drivers. Control for the mode selection is done via a two–bit control word into DP0 and DP1. The drivers are pre-arranged 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 required signal levels. The mode of each driver in the different interface modes that can be selected is shown in Figures 10 to 13. There are three basic types of driver circuits — RS-232, RS-423, and RS-485. The RS-232 drivers output single–ended signals with a minimum of +5V (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 such as DTR and RTS. The RS-423 drivers are also single–ended signals with a minimum voltage output of +3.6V (with 450Ω loading) and can operate up to 120Kbps. Open circuit V OL a nd V OH measurements are + 4.0V to + 6.0V when supplying +5V to VDD and VSS. The RS-423 drivers can be used in RS-449, EIA-530, EIA530A and V.36 applications as Category II signals from each of their corresponding specifications. The third type of driver produces a differential signal that can maintain RS-485, +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 (V.11) requirements of +2V differential output levels with 100Ω loads. The RS-422 drivers can be used in RS-449, EIA-530, EIA-530A and V.36 applications as Category I signals which are used for clock and data. The drivers also have separate enable pins which makes the SP522/SP524 helpful for half-duplex applications. The enable pins will tri-state the drivers when the ENT1 and ENT2 pins are at a logic low ("0"). For the SP524, ENT3 and ENT4 are used for the two additional drivers. During tri-stated conditions, the driver outputs will be at a high impedance state. Rev. 7/10/03 SP522 Multi–Mode Serial Transceivers © Copyright 2003 Sipex Corporation 9 Unused driver inputs can be left floating; pull– up resistors to +5V is internally connected on the inputs so that the output is at a logic low ("0"). For differential drivers, the non-inverting output will be at a logic high ("1"). Receivers The SP522 has two (2) independent receivers which can be programmed for the different interface modes. Control for the mode selection is done by DP0 and DP1. 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 required interface. Figures 10 to 13 show the mode of each receiver in the different interface modes that can be selected. There are three basic types of receiver circuits — RS-232, RS-423, and RS-485. The RS-232 receiver is a single–ended input with a threshold of 0.8V to 3.0V. The RS-232 receiver has an operating voltage range of +15V and can receive signals up to 120Kbps. The input sensitivity complies with EIA-RS-232 and V.28 at +3V to -3V. The input impedance is 3kΩ to 7kΩ. The RS-423 receivers are also single–ended but have an input threshold as low as +300mV. 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. RS423 receivers can be used in RS-449, EIA530, EIA-530A and V.36 applications as Category II signals as indicated by their corresponding specifications. The third type of receiver is a differential which supports RS-485. The RS-485 receiver has an input impedance of 15KΩ and a differential threshold of +300mV. Since the characteristics of an RS-422 (V.11) receiver are actually subsets of RS-485, the receivers for RS-422 requirements are covered by the RS-485 receivers. RS-422 receivers are used in applications for RS-449, EIA530, EIA-530A and V.36 as Category I signals for receiving clock, data, and some control line signals. The differential receivers can receive data up to 10Mbps. Rev. 7/10/03 All receivers include a fail-safe feature that output a known logic state when the receiver inputs are unconnected. For single-ended RS-232 receivers, there are internal 5kΩ pulldown resistors on the inputs which produces a logic high ("1") at the receiver outputs. The single-ended RS-423 receivers produce a logic low ("0") on the output when the inputs are open. This is due to a pull-up device connected to the input. The differential receivers have the same internal pull-up device on the non-inverting input which produces a logic high ("1") at the receiver output. The receivers also have enable pins which allow for convenient half-duplex configurations. The receivers are tri-stated when the ENR1 and ENR2 pins are at a logic high ("1"). For the SP524, ENR3 and ENR4 are used for the additional two receivers. In addition to the separate enable lines on each transceiver, there is a latch enable pin, LATCH_EN, which is used for enabling and disabling the decoder control inputs (DP0, DP1) and transceiver enable pins. This pin will default to a logic high ("1") if not being used. Loopback The SP522 and SP524 contain a loopback feature that allows the driver outputs to "loopback" to the receiver inputs for diagnostic testing in the application. The loopback function is activated when the LOOPBCK pin is low. When in loopback mode, the driver outputs are tri-stated and the receiver inputs are deactivated. The receiver input impedance while in loopback will be a minimum of 12kΩ. The loopback function can be initiated during any mode of operation, RS-232, RS-423 or RS-422. The travel path of the transceivers in loopback is shown on Figure 9. The loopback function overrides the separate enable pins for the drivers or receivers. When LOOPBCK is at a logic low ("0"), the device will be configured in loopback regardless whether the transceiver is enabled or disabled. If the loopback function is not required, the LOOPBCK pin will default to a logic high ("1") state. SP522 Multi–Mode Serial Transceivers © Copyright 2003 Sipex Corporation 10 VDD IN5819 +5V 10µF 10µF VSS VDD 1N5819 +5V 28 VDD 2 VCC 14 19 29 VSS VCC VCC + 10µF VSS 10µF 10µF + SP524 10µF 31 DP0 32 DP1 DECODER LOGIC LATCH_EN 30 LOOPBCK 23 21 VDD 13 VCC 22 VSS SP522 8 DP0 7 DP1 DECODER LOGIC LATCH_EN 2 LOOPBCK 23 24 T1IN 36 ENT1 25 T2IN 35 ENT2 44 R1OUT 40 ENR1 43 R2OUT 39 ENR2 T1 T1OUTA 22 T1OUTB 20 T2OUTA 18 T2OUTB 17 R1INA 3 R1INB 4 R2INA 5 R2INB 6 T2 10 T1IN 6 ENT1 9 T2IN 4 ENT2 1 R1OUT 5 ENR1 24 R2OUT 3 ENR2 T1 T1OUTA 11 T1OUTB 12 T2OUTA 15 T2OUTB 16 R1INA 18 R1INB 17 R2INA 20 R2INB 19 R1 T2 R1 LOOPBACK PATHS R2 LOOPBACK PATHS R2 26 T3IN 34 ENT3 27 T4IN 33 ENT4 42 R3OUT 38 ENR3 41 R4OUT 37 ENR4 GND 1 T3 T3OUTA 16 T3OUTB 15 T4OUTA 13 T4OUTB 11 R3INA 7 R3INB 8 R4INA 9 R4INB 10 GND 21 T4 14 GND R3 R4 GND 12 Figure 9. Typical Operating Circuit, SP522 and SP524 Rev. 7/10/03 SP522 Multi–Mode Serial Transceivers © Copyright 2003 Sipex Corporation 11 LOOPBACK PATHS MODE: RS232 DRIVER DP0 1 DP1 0 RECEIVER DP0 DP1 1 0 SP522 R1INA (18) R1OUT (1) R2INA (20) R2OUT (24) T1IN (10) T1OUTA (11) T2IN (9) T2OUTA (15) RECEIVERS DRIVERS SP524 R1INA (3) R1OUT (44) R2INA (5) R2OUT (43) R3INA (7) R3OUT (42) R4INA (9) R4OUT (41) T1IN (24) T1OUTA (22) T2IN (25) T2OUTA (18) T3IN (26) T3OUTA (16) T4IN (27) T4OUTA (13) RECEIVERS DRIVERS LATCH_EN 1 Figure 10. Mode Diagram — RS232 LOOPBCK 1 ENTX 1 ENRX 0 Rev. 7/10/03 SP522 Multi–Mode Serial Transceivers © Copyright 2003 Sipex Corporation 12 MODE: RS423 DRIVER DP0 1 DP1 1 RECEIVER DP0 DP1 1 1 SP522 R1INA (18) R1OUT (1) R2INA (20) R2OUT (24) T1IN (10) T1OUTA (11) T2IN (9) T2OUTA (15) RECEIVERS DRIVERS SP524 R1INA (3) R1OUT (44) R2INA (5) R2OUT (43) R3INA (7) R3OUT (42) R4INA (9) R4OUT (41) T1IN (24) T1OUTA (22) T2IN (25) T2OUTA (18) T3IN (26) T3OUTA (16) T4IN (27) T4OUTA (13) RECEIVERS DRIVERS LATCH_EN 1 Figure 11. Mode Diagram — RS423 LOOPBCK 1 ENTX 1 ENRX 0 Rev. 7/10/03 SP522 Multi–Mode Serial Transceivers © Copyright 2003 Sipex Corporation 13 MODE: RS422/485 DRIVER DP0 0 DP1 1 RECEIVER DP0 DP1 0 1 SP522 R1INA (18) R1OUT (1) R1INB (17) R2INA (20) R2OUT (24) R2INB (19) T1IN (10) T1OUTA (11) T1OUTB (12) T2IN (9) T2OUTA (15) T2OUTB (16) RECEIVERS DRIVERS LATCH_EN 1 LOOPBCK 1 ENTX 1 ENRX 0 Figure 12. Mode Diagram — RS422/RS485 for the SP522 Rev. 7/10/03 SP522 Multi–Mode Serial Transceivers © Copyright 2003 Sipex Corporation 14 MODE: RS422/485 DRIVER DP0 0 DP1 1 RECEIVER DP0 DP1 0 1 SP524 R1INA (3) R1OUT (44) R1INB (4) R2INA (5) R2OUT (43) R2INB (6) R3INA (7) R3OUT (42) R3INB (8) R4INA (9) R4OUT (41) R4INB (10) T1IN (24) T1OUTA (22) T1OUTB (20) T2IN (25) T2OUTA (18) T2OUTB (17) T3IN (26) T3OUTA (16) T3OUTB (15) T4IN (27) T4OUTA (13) T4OUTB (11) RECEIVERS DRIVERS LATCH_EN 1 LOOPBCK 1 ENTX 1 ENRX 0 Figure 13. Mode Diagram — RS422/RS485 for the SP524 Rev. 7/10/03 SP522 Multi–Mode Serial Transceivers © Copyright 2003 Sipex Corporation 15 APPLICATIONS INFORMATION DCE-DTE Applications A serial port can be easily configured for DTE and DCE using multiple SP522 and/or SP524 parts. As shown on Figure 14, the transceivers are half-duplexed to provide convenient DCEDTE capability. The driver outputs are connected to the receiver inputs with only one pair out to the serial port for each driver/receiver. When the driver is tri-stated by applying a logic low ("0") to ENT, the receivers can be active to receive the appropriate input. The driver output during tri-state is high impedance, therefore will not degrade the signal levels of the receiver input signal. When the receiver is tri-stated by applying a logic ("1") to ENR, the driver output is active to drive the appropriate signal without interference from the receiver. The receiver inputs are at least 12kΩ to ground during tri-state. Configuring Additional Multi-Protocol Transceivers Serial ports usually can have two data signals (SD, RD), three clock signals (TT, ST, RT), and at least eight control signals (CS, RS, etc.). EIA-RS-449 contains twenty six signal types including for a DB-37 connector. A DB-37 serial port design may require thirteen drivers and fourteen receivers. Although many applications do not use all these signals, some applications may need to support extra functions such as diagnostics. Sipex's SP504 supports enough transceivers for the primary channels of data, clock and control signals. Configuring LL, RL and TM may require two additional drivers and one receiver if designing for a DTE (one driver and two receivers for a DCE). The SP522 and SP524 is a convenient solution in a design that requires two extra single ended or differential transceivers. The SP504 and SP522, shown in Figure 15, can be programmed in various configurations. The SP504 is programmed for RS-449 mode. By connecting the decoder pins of the SP504 to the DP0 and DP1 pins accordingly, the SP522 is programmed in RS-423 mode. This adds two single ended transceivers to the application. For applications needing more than five RS-422 transceivers or more than three RS-423 transceivers, the SP504 Rev. 7/10/03 can be programmed to RS-422 whereas a SP524 can be added and programmed to RS-423, thus creating seven RS-422 channels and four RS-423 channels. The SP504 and the SP522/ SP524 can be configured to custom fit the various serial port application needs. +5V Only Operation Using the SP782 The SP522 and SP524 use external +10V or +5V voltage supplies for power to maintain the RS-232 and RS-423 voltage levels, respectively. However, if a low-cost +5V solution if preferred, the SP522 and SP524 can be configured with the SP782 or SP784 programmable charge pump. The Sipex patent-pending programmable charge pumps offer +10V or +5V outputs. The programmability is used for switching from RS-232 using the +10V outputs to RS-423 using the +5V outputs. The SP782 requires 0.1µF capacitors and the SP784 requires 10µF capacitors for the charge pump. Please refer to the SP782 and SP784 data sheet for details on the programmable charge pump. Achieving +10V with +12V Supplies Since the SP522 and SP524 use external +10V supplies, systems that have +12V supplies must be regulated down to +10V. This can be simply configured by placing diodes in series with the VDD and VSS lines. The absolute maximum supply voltage is +12V. Since most +12V power supplies have some voltage tolerances, usually +10%, any increase above the 12V maximum will damage the device. However, the +12V supply may be used providing that the maximum supply voltages do not exceed the rated absolute maximum VSS and VDD. Sequencing of Power Supplies Power Supplies for the SP522 and SP524 must be sequenced. The recommended sequence is VCC first, VDD 50-80µSec later and VSS 100 to 1,000µSec after VDD. There are no sequencing requirements for the SP522 or SP524 when they are powered from either the SP782 or SP784 charge pump devices or from the VDD and VSS supply pins of the SP504 or SP505 charge pump powered devices. For further details, see the application note, VDD, VCC and VSS Power Supply Sequencing. SP522 Multi–Mode Serial Transceivers © Copyright 2003 Sipex Corporation 16 +5V + 10µF 13 7 8 2 10 6 1 5 9 4 24 3 +10V + 21 VDD 22 VSS + 11 12 18 17 15 16 20 19 LOOPBCK 10µF –10V 10µF VCC DP1 DP0 SP522 LATCH_EN 6 GND 14 +5V + 10µF +10V + 10µF –10V 10µF 2 14 19 28 VDD VCC 32 29 DP1 VSS 31 DP0 SP524 + 30 LATCH_EN 24 36 44 40 25 35 43 39 26 34 42 38 27 33 41 37 LOOPBCK 22 20 3 4 18 17 5 6 16 15 7 8 13 11 9 10 23 GND GND GND 1 12 21 Figure 14. DTE/DCE Application with the SP522 and SP524 Rev. 7/10/03 SP522 Multi–Mode Serial Transceivers © Copyright 2003 Sipex Corporation 17 1N5819 +5V 10µF 22µF various VCC + supply pins VCC 22µF 22µF + + + 27 26 30 28 31 + 22µF VDD C1+ C1- C2+ C232 VSS SP504CF DB-37 Connector Drivers 61 TxD 14 DTR 13 RTS 16 TxC 15 ST 22 RL 17 LL 24 59 58 56 54 52 63 65 42 44 47 45 51 49 70 71 37 38 66 67 68 69 35 36 39 40 76 77 TDEC0 TDEC1 TDEC2 TDEC3 RDEC0 RDEC1 RDEC2 RDEC3 Tied to TDEC0 Tied to TDEC1 4 22 12 30 7 25 17 35 14 10 CIRCUIT MNEMONIC SG SC RC IS IC TR DM SD RD TT ST RT RS CS RR SQ NS SF SR SI SSD SRD SRS SCS SRR LL RL TM SS SB SIGNAL GROUND SEND COMMON RECEIVE COMMON TERMINAL IN SERVICE INCOMING CALL TERMINAL READY DATA MODE SEND DATA RECEIVE DATA TERMINAL TIMING SEND TIMING RECEIVE TIMING REQUEST TO SEND CLEAR TO SEND RECEIVER READY SIGNAL QUALITY NEW SIGNAL SELECT FREQUENCY SIGNAL RATE SELECTOR SIGNAL RATE INDICATOR SECONDARY SEND DATA SECONDARY RD SECONDARY RS SECONDARY CS SECONDARY RR LOCAL LOOPBACK REMOTE LOOPBACK TEST MODE SELECT STANDBY STANDBY INDICATOR CIRCUIT NAME CIRCUIT DIRECTION -------------TO DCE FROM DCE TO DCE FROM DCE TO DCE FROM DCE TO DCE FROM DCE TO DCE FROM DCE FROM DCE TO DCE FROM DCE FROM DCE FROM DCE TO DCE TO DCE TO DCE FROM DCE TO DCE FROM DCE TO DCE FROM DCE FROM DCE TO DCE TO DCE FROM DCE TO DCE FROM DCE CIRCUIT TYPE COMMON Receivers RxD 1 RxC 20 CTS 80 DSR 78 DCD 19 RI 21 SCT 79 TIMING CONTROL 5 23 RS-449 Mode 0 0 1 1 DATA CONTROL CONTROL CONTROL 12 11 10 9 2 3 4 5 see pinout diagram for various ground pins RS-449 Interchange Circuits Table +5V + 10µF 13 7 8 2 10 +5V + 21 VDD 22 VSS + 10µF 10µF –5V VCC DP1 DP0 SP522 LATCH_EN 11 6 9 15 4 RS-423 Outputs 1 5 24 3 LOOPBCK 20 18 RS-423 Inputs GND 14 Figure 15. Adding extra channels using the SP522 and SP504 Rev. 7/10/03 SP522 Multi–Mode Serial Transceivers © Copyright 2003 Sipex Corporation 18 SECONDARY CHANNEL PRIMARY CHANNEL 6 24 8 26 9 27 11 29 13 31 15 CONTROL DATA PACKAGE: PLASTIC SMALL OUTLINE (SOIC) (WIDE) E H D A Ø e B A1 L DIMENSIONS (Inches) Minimum/Maximum (mm) A A1 B D E e H L Ø 24–PIN 0.093/0.104 (2.352/2.649) 0.004/0.012 (0.102/0.300) 0.013/0.020 (0.330/0.508) 0.599/0.614 (15.20/15.59) 0.291/0.299 (7.402/7.600) 0.050 BSC (1.270 BSC) 0.394/0.419 (10.00/10.64) 0.016/0.050 (0.406/1.270) 0°/8° (0°/8°) Rev. 7/10/03 SP522 Multi–Mode Serial Transceivers © Copyright 2003 Sipex Corporation 19 PACKAGE: PLASTIC SHRINK SMALL OUTLINE (SSOP) E H D A Ø e B A1 L DIMENSIONS (Inches) Minimum/Maximum (mm) A A1 B D E e H L Ø 24–PIN 0.068/0.078 (1.73/1.99) 0.002/0.008 (0.05/0.21) 0.010/0.015 (0.25/0.38) 0.317/0.328 (8.07/8.33) 0.205/0.212 (5.20/5.38) 0.0256 BSC (0.65 BSC) 0.301/0.311 (7.65/7.90) 0.022/0.037 (0.55/0.95) 0°/8° (0°/8°) Rev. 7/10/03 SP522 Multi–Mode Serial Transceivers © Copyright 2003 Sipex Corporation 20 PACKAGE: 44 Pin MQFP 1 0.30" RAD. TYP. 1 D D1 D2 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. 7/10/03 SP522 Multi–Mode Serial Transceivers © Copyright 2003 Sipex Corporation 21 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 Rev. 7/10/03 SP522 Multi–Mode Serial Transceivers © Copyright 2003 Sipex Corporation 22 ORDERING INFORMATION Model Temperature Range Package Types SP522CT ........................................................................... 0°C to +70°C .............................................................................................. 24-pin SOIC SP522CA .......................................................................... 0°C to +70°C ............................................................................................. 24-pin SSOP SP524CF ........................................................................... 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. 7/10/03 SP522 Multi–Mode Serial Transceivers © Copyright 2003 Sipex Corporation 23