® SP333 +5V Only RS-232/AppleTalk™ Programmable Transceiver ■ +5V Only, Single Supply Operation ■ Low Power Shutdown ■ 28-Pin SOIC Packaging ■ 3 Drivers, 5 Receivers – RS-232 ■ Complete AppleTalk™ Interface ■ High Data Rates 10Mbps Differential Transceivers 460kbps Single-Ended Transceivers DESCRIPTION… The SP333 is a monolithic device that supports both Macintosh™ and PC serial interfaces. RS-232 mode offers three (3) RS-232 drivers and five (5) RS-232 receivers. Mac mode includes a differential driver and a single-ended inverting driver. Receivers in Mac mode include one differential receiver, one non-inverting single-ended receiver and one inverting single-ended receiver. An on-chip charge pump allows +5V-only operation, and a low power Shutdown mode makes the SP333 ideal for battery powered applications. The interface mode can be changed at any time by a mode select pin. PC Mode 9 0.1µF +5V 0V 25 Mac Mode 0.1µF 5 V CC 10 RS-232/MacMode V+ 14 11 C2+ VShutdown 26 13 C212 SP333 0.1µF 27 TI1 28 TI2 1 TI3 19 RX1 20 RX2 21 RX3 22 RX4 23 RX5 3 TGoddard/SP333/9617R0 RXEN 9 0.1µF 0.1µF +5V +5V 5 V 25 CC SP333 0.1µF TX1 6 T1 T3 R1 R2 R3 R4 R5 0.1µF TX1 6 27 TI1 T2 0.1µF 10 RS-232/MacMode V+ 14 11 C2+ VShutdown 26 13 C212 TX2 7 2 TXEN TX3 4 1 TI3 RI1 15 19 RX1 T1 T3 TX2 7 TX3 4 RI2 16 R1 RI1 15 RI2 16 RI3 17 21 RX3 R3 RI3 17 RI4 18 RI5 24 GND 23 RX5 8 3 RXEN SP333 RS-232/AppleTalk Programmable Transceiver 1 R5 RI5 24 GND 8 © Copyright 2000 Sipex Corporation ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. VCC...................................................................................................+12V Input Voltages Logic........................................................-0.3V to (VCC+0.5V) Drivers..................................................-0.3V to (VCC+0.5V) Receivers..................................................................±15V Driver Outputs......................................................................................±14V Storage Temperature..................................................-65˚C to +150˚C Power Dissipation..........................................................................1000mW SPECIFICATIONS TMIN to TMAX and VCC = 5V±5% unless otherwise noted. PARAMETER MAC Mode (pin 25 = +5V) Differential Driver High Level Output Voltage Low Level Output Voltage Differential Output, Load Differential Output, No Load Driver Short Circuit Current Output Leakage Current Input High Voltage Input Low Voltage Input Current Transition Time Propagation Delay tPHL tPLH Data Rate MIN. TYP. MAX. +3.6 ±5V ±40 -3.6 ±10 500 ±100 2.0 0.8 ±20 30 100 100 10 UNITS Volts Volts Volts Volts mA µA Volts Volts µA ns RL = 450Ω, CL = 50pF RL = 450Ω, CL = 50pF RL = 450Ω, CL = 50pF RL = 450Ω to GND; VIN LOW≤0.8V or VIN HIGH≥2.0V RL = 450Ω to GND; VIN LOW≤0.8V or VIN HIGH≥2.0V RL = ∞ –7V≤VO≤+7V; Infinite duration Applies to single-ended driver inputs Applies to single-ended driver inputs VIN = 0V to VCC RL = 450Ω, CL = 50pF; Rise/Fall 10% – 90% +6.0 Volts Low Level Output Voltage –3.6 Volts ±10 Volts mA Volts Volts µA ns Driver Open Circuit Voltage Driver Short Circuit Current Input High Voltage Input Low Voltage Input Current Transition Time Propagation Delay tPHL tPLH Data Rate Differential Receiver Differential Input Threshold Input Hysteresis Input Resistance Output Voltage High Output Voltage Low Short Circuit Current TGoddard/SP333/9617R0 ±40 2.0 0.8 ±20 30 100 100 10 -0.2 +0.2 70 12 3.5 0.4 85 IOH = 8mA IOH = –8mA RL = 450Ω (TX outputs to GND) RL = ∞ –7V≤VO≤+7V; VIN LOW≤0.8V or VIN HIGH≥2.0V –7V≤VO≤+7V; TxEN = VCC Applies to differential driver inputs Applies to differential driver inputs VIN = 0V to VCC RL = 450Ω, CL = 50pF; Rise/Fall 10% – 90% ns ns Mbps Single-Ended Inverting Driver High Level Output Voltage +3.6 –6.0 CONDITIONS ns ns Mbps RL = 450Ω, CL = 50pF RL = 450Ω, CL = 50pF RL = 450Ω, CL = 50pF Volts mV kΩ Volts Volts mA -7V≤VCM≤+7V VCM=0V -7V≤VCM≤+7V ISOURCE = –4mA ISINK = +4mA 0V≤VOUT≤VCC SP333 RS-232/AppleTalk Programmable Transceiver 2 © Copyright 2000 Sipex Corporation SPECIFICATIONS (CONTINUED) TMIN to TMAX and VCC = 5V±5% unless otherwise noted. PARAMETER Differential Receiver Propagation Delay tPHL tPLH Data Rate MIN. TYP. MAX. 100 100 10 Single-Ended Inverting Receiver Input Voltage Range –15 Input Threshold Low 0.8 Input Threshold High Hysteresis 200 Input Impedance 3 Output Voltage High 3.5 Output Voltage Low Propagation Delay tPHL tPLH Data Rate 10 Single-Ended Non-Inverting Receiver Input Voltage Range –7 Input Threshold Low -0.2 Input Threshold High Hysteresis Input Impedance 12 Output Voltage High 3.5 Output Voltage Low Propagation Delay tPHL tPLH Data Rate 10 +15 1.2 1.7 500 5 3.0 1000 7 0.4 100 100 UNITS CONDITIONS ns ns Mbps RL = 450Ω, CL = 50pF RL = 450Ω, CL = 50pF RL = 450Ω, CL = 50pF Volts Volts Volts mV kΩ Volts Volts ISOURCE = –4mA ISINK = +4mA ns ns Mbps +7 +0.2 70 15 0.4 100 100 Volts Volts Volts mV kΩ Volts Volts ISOURCE = –4mA ISINK = +4mA ns ns Mbps PC Mode (pin 25 = GND) RS-232 Driver TTL Input Levels VIL VIH High Level Voltage Output Low Level Voltage Output Open Circuit Output Short Circuit Current Power Off Impedance Slew Rate 0.8 2.0 +5.0 -15.0 +15.0 -5.0 ±15 ±100 300 60 Transition Time 1.56 Propagation Delay tPHL tPLH Data Rate RS-232 Receiver TTL Output Levels VOL VOH Receiver Input High Threshold TGoddard/SP333/9617R0 460 Volts Volts Volts Volts Volts mA Ohms V/µs µs 1.5 µs 1.3 µs 600 kbps 0.4 Volts 3.0 Volts 2.4 1.7 Applies to transmitter inputs Applies to transmitter inputs RL = 3kΩ to Gnd RL = 3kΩ to Gnd RL = ∞ VOUT = Gnd VCC=0V; VOUT= ±2V RL=3kΩ, CL=50pF; From +3V to -3V or -3V to +3V Rise/fall time, between +3V & –3V ; RL=3kΩ, CL=2500pF RL=3kΩ, CL=1000pF; From 1.5V of TIN to 50% of VOUT RL=3kΩ, CL=1000pF; From 1.5V of TIN to 50% of VOUT RL=3kΩ, CL=1000pF ISINK = 4mA ISOURCE = -4mA SP333 RS-232/AppleTalk Programmable Transceiver 3 © Copyright 2000 Sipex Corporation SPECIFICATIONS (CONTINUED) TMIN to TMAX and VCC = 5V±5% unless otherwise noted. PARAMETER RS-232 Receiver Low Threshold Input Voltage Range Input Impedance Hysteresis Transmission Rate Propagation Delay tPHL tPLH Data Rate MIN. TYP. 0.8 -15 3 0.2 10 1.2 5 0.5 MAX. UNITS CONDITIONS Volts Volts kOhms Volts Mbps +15 7 1.0 VIN=±15V VCC=+5V 100 100 600 600 600 ns ns kbps From 50% of VIN to 1.5V of ROUT From 50% of VIN to 1.5V of ROUT 15 25 75 mA µA No load; VCC=5.0V; TA=25˚C TA=25˚C, VCC=5.0V 200 200 200 200 1000 1000 1000 1000 ns ns ns ns CL=100pF, Figures 2 & 4, S2 closed CL=100pF, Figures 2 & 4, S1 closed CL=15pF, Figures 2 & 4, S2 closed CL=15pF, Figures 2 & 4, S1 closed Receiver Delay Time from Enable Mode to Tri-state Mode Single-Ended Mode tPZL; Enable to Output low 200 1000 tPZH; Enable to Output high 200 1000 tPLZ; Disable from Output low 200 1000 tPHZ; Disable from Output high 200 1000 ns ns ns ns CRL=15pF, Figures 1 & 6, S1 closed CRL=15pF, Figures 1 & 6, S2 closed CRL=15pF, Figures 1 & 6, S1 closed CRL=15pF, Figures 1 & 6, S2 closed Differential Mode tPZL; Enable to Output low tPZH; Enable to Output high tPLZ; Disable from Output low tPHZ; Disable from Output high ns ns ns ns CRL=15pF, Figures 1 & 6, S1 closed CRL=15pF, Figures 1 & 6, S2 closed CRL=15pF, Figures 1 & 6, S1 closed CRL=15pF, Figures 1 & 6, S2 closed 460 POWER REQUIREMENTS No Load Supply Current Shutdown Supply Current AC PARAMETERS Differential Mode tPZL; Enable to Output low tPZH; Enable to Output high tPLZ; Disable from Output low tPHZ; Disable from Output high Notes: 1. 2. 3. 4. Output Under Test 200 200 200 200 1000 1000 1000 1000 Measured from 2.5V of RIN to 2.5V of ROUT. Measured from one–half of RIN to 2.5V of ROUT. Measured from 1.5V of TIN to one–half of TOUT. Measured from 2.5V of RO to 0V of A and B. 500Ω VCC S1 S2 Figure 1. Circuit Driver TGoddard/SP333/9617R0 Timing Test VCC S1 CRL CL 1KΩ Test Point Receiver Output 1KΩ S2 Load Figure 2. Circuit Receiver SP333 RS-232/AppleTalk Programmable Transceiver 4 Timing Test Load © Copyright 2000 Sipex Corporation f = 1MHz; tR < 10ns; tF < 10ns +3V 1.5V DRIVER INPUT 1.5V 0V TX2 DRIVER OUTPUT TX 1 tPLH tPHL VO 1/2VO 1/2VO DIFFERENTIAL VO+ OUTPUT 0V TX1 – TX2 VO– tSKEW tSKEW tR tF Figure 3. Driver Propagation Delays f = 1MHz; tR < 10ns; tF < 10ns +3V TXEN 0V 1.5V 1.5V tZL 5V TXx VOL 2.3V VOH TXx 2.3V 0V tLZ Output normally LOW 0.5V Output normally HIGH 0.5V tZH tHZ Figure 4. Driver Enable and Disable Times V0D2+ RI1–RI2 V0D2– 0V VOH 1.5V RX VOL INPUT tPHL OUTPUT 0V 1.5V tPLH f = 1MHz; tR < 10ns; tF < 10ns Figure 5. Receiver Propagation Delays TGoddard/SP333/9617R0 SP333 RS-232/AppleTalk Programmable Transceiver 5 © Copyright 2000 Sipex Corporation +3V RXEN 0V 1.5V f = 1MHz; t < 10ns; t < 10ns R F tZL 5V RXx VIL 1.5V VIH RXx 0V 1.5V 1.5V tLZ Output normally LOW 0.5V Output normally HIGH 0.5V tZH tHZ Figure 6. Receiver Enable and Disable Times THEORY OF OPERATION... The single-ended AppleTalk driver also has typical voltage output swings of ±5V under loaded conditions, and ±8V under no-load conditions. The single-ended AppleTalk driver can maintain ±3.6V (minimum) swings under worst case conditions of 450Ω to ground. The singleended AppleTalk driver can support data rates over 400kbps. The SP333 is a single chip device that can be configured via software for either RS-232 or AppleTalk™ interface modes at any time. The SP333 is made up of three basic circuit elements: single-ended drivers and receivers, differential drivers and receivers, and charge pump. APPLETALK™ DRIVERS/RECEIVERS... The receiver section of the SP333 is made up of a differential receiver, a single-ended non-inverting receiver , and a single-ended inverting receiver. The differential receiver has an input sensitivity of ±200mV over a common mode range of ±7V. The receivers have a typical input resistance of 15kΩ (12kΩ minimum). The differential receiver can receive data up to 10Mbps. To program the SP333 for MacMode, Pin 25 should be connected to a logic HIGH. In MacMode, the SP333 offers a complete AppleTalk serial interface. The driver section of the AppleTalk interface is made up of a differential driver and a singleended inverting driver. The differential driver has voltage swings that are typically ±5V on each output pin under loaded conditions, and typically ±8V under no-load conditions. The differential driver can maintain ±3.6V (minimum) swings (per pin) under worst case load conditions of 450Ω between the differential output. The single-ended non-inverting receiver has a ±200mV input threshold, however, the input voltage can vary between ±7V. The typical input resistance of the single-ended non-inverting receiver is 15kΩ (12kΩ minimum). The single-ended non-inverting receiver can also receive data up to 10Mbps. The differential driver is equipped with a tristate control pin. When TXEN is a logic LOW, the differential driver is active. When the TXEN pin is a logic HIGH, the differential driver outputs are tri-stated. The TXEN pin only functions in MacMode. The differential AppleTalk driver can support data rates up to 10Mbps. TGoddard/SP333/9617R0 The SP333 also has a single-ended inverting receiver input. This receiver is basically an RS232 receiver (R5 receiver) and is typically used as a GPI (General Purpose Input) in the AppleTalk interface. The GPI input has TTLcompatible input thresholds that can receive SP333 RS-232/AppleTalk Programmable Transceiver 6 © Copyright 2000 Sipex Corporation signals up to ±15V. The input resistance of the single-ended inverting receiver is typically 5kΩ (3kΩ to 7kΩ). The GPI receiver can operate up to 10Mbps. receivers features 500mV of hysteresis margin to minimize the affects of noisy tranmission lines. The inputs also have a 5kΩ resistor to ground, in an open circuit situation the input of the receiver will be forced low, committing the output to a logic HIGH state. The input resistance will maintain 3kΩ-7kΩ over a ±15V range. The maximum operating voltage range for the receiver is ±30V, under these conditions the input current to the receiver must be limited to less than 100mA. Due to the on-chip ESD protection circuitry, the receiver inputs will be clamped to ±15V levels; this should not affect operation at ±30Volts. The RS-232 receivers can operate over 400kbps. SINGLE ENDED DRIVERS/RECEIVERS... RS-232 (V.28) Drivers... The single-ended drivers and receivers comply the with the RS-232E and V.28 standards. The drivers are inverting transmitters which accept either TTL or CMOS inputs and output the RS232 signals with an inverted sense relative to the input logic levels. Typically, the RS-232 driver output voltage swing is ±9V with no load and is guaranteed to be greater than ±5V under full load. The drivers rely on the V+ and V- voltages generated by the on-chip charge pump to maintain proper RS-232 output levels. With worst case load conditions of 3kΩ and 2500pF, the four RS-232 drivers can still maintain ±5V output levels. The drivers can operate over 400kbps; the propagation delay from input to output is typically 1.5µs. During shutdown, the driver outputs will be put into a high impedance tri-state mode. CHARGE PUMP... The charge pump is a Sipex-patented design (5,306,954) and uses a unique approach compared to older less-efficient designs. The charge pump still requires four external capacitors, but uses a four-phase voltage shifting technique to attain symmetrical 10V power supplies. The capacitor values of the SP333 can be as low as 0.1µF. Figure 11a shows the waveform found on the positive side of capacitor C2, and Figure 11b shows the negative side of capacitor C2. There is a free-running oscillator that controls the four phases of the voltage shifting. A description of each phase follows. RS-232 (V.28) Receivers... The RS-232 receivers convert RS-232 input signals to inverted TTL signals. Each of the four VCC = +5V VCC = +5V C4 +10V + C1 + – C2 – + – VDD Storage Capacitor + C1 VSS Storage Capacitor C3 – VDD Storage Capacitor VSS Storage Capacitor C3 –5V C4 C2 – – C4 +5V – + –10V + VDD Storage Capacitor C1 VSS Storage Capacitor C3 + – –5V C2 + – – + + – VDD Storage Capacitor VSS Storage Capacitor C3 –5V Figure 10. Charge Pump Phase 4 Figure 9. Charge Pump Phase 3 TGoddard/SP333/9617R0 – VCC = +5V + – – + – Figure 8. Charge Pump Phase 2 VCC = +5V C1 + + C2 –5V Figure 7. Charge Pump Phase 1 + C4 +5V – + SP333 RS-232/AppleTalk Programmable Transceiver 7 © Copyright 2000 Sipex Corporation the Vdd storage capacitor. 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. 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. C1+ is then switched to ground and charge in C1- is transferred to C2-. Since C2+ is connected to +5V, the voltage potential across capacitor C2 is now 10V. 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. 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 -10V to C3. Simultaneously, the positive side of capacitor C1 is switched to +5V and the negative side is connected to ground. The clock rate for the charge pump typically operates at 15kHz. The external capacitors should be 0.1µF 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 ±10V. The current drain from the ±10V supplies is used for the RS232 drivers. For the RS-232 driver, the current requirement is 3.5mA per driver. The external power supplies should provide a power supply sequence of either: +10V, –10V, and then +5V; or –10V, +10V, and then +5V. It is critical that the ±10V supplies are on before VCC. Phase 3 -Vdd charge storage- The third phase of the clock is identical to the first phase- the transferred charge 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 10V. Phase 4 -Vdd transfer- The fourth phase of the clock connects the negative terminal of C2 to ground and transfers the generated 10V across C2 to C4, +10V a) C2+ GND GND b) C2– –10V Figure 11. Charge Pump Waveforms TGoddard/SP333/9617R0 SP333 RS-232/AppleTalk Programmable Transceiver 8 © Copyright 2000 Sipex Corporation Shutdown Mode The SP333 can be put into a low power shutdown mode by connecting the Shutdown pin (SD, Pin 26) to a logic HIGH. During Shutdown, the driver outputs are put into a high impedance tri-state, and the charge pump is put into stand-by mode. The supply current drops to less than 10µA during shutdown and can be activated in either RS-232 or AppleTalk mode. For normal operation, the SD pin should be connected to a logic LOW. Receiver Enable The SP333 has a control line to enable or disable the receiver outputs. Pin 3 (RXEN) is active LOW; a logic LOW on Pin 3 will enable the receiver outputs. A logic HIGH on Pin 3 will disable the receiver outputs. The receiver enable function can be initiated in either RS-232 or AppleTalk mode. Wake-Up The SP333 also features a "wake-up" function. The wake up function allows the RS-232 receivers to remain active during Shutdown mode unless they are disabled by the Receiver Enable control pin (Pin 3). The wake-up feature allows users to take advantage of the low power Shutdown mode and keep the receivers active to accept an incoming "ring indicator" signal. TGoddard/SP333/9617R0 SP333 RS-232/AppleTalk Programmable Transceiver 9 © Copyright 2000 Sipex Corporation SP333 Typical Application for AppleTalk™ and RS-232 0.1µF 0.1µF +5V +5V 5 9 25 12 SP333 11 13 0.1µF 10 APPLETALK™ INTERFACE 14 0.1µF 26 6 7 27 2 1 4 19 16 15 21 17 7 8 4 5 2 23 3 6 3 1 24 8 +5V 0V 9 25 0.1µF 0.1µF 12 11 13 0.1µF 5 10 SP333 14 PC INTERFACE 0.1µF 26 27 6 28 7 1 4 19 15 20 16 21 17 22 18 23 3 24 7 8 TGoddard/SP333/9617R0 6 4 5 2 3 1 8 SP333 RS-232/AppleTalk Programmable Transceiver 10 © Copyright 2000 Sipex Corporation SP333 PIN CONFIGURATION TI3 TXEN RXEN TX3 VCC TX1 TX2 GND C1+ V+ C2+ C1C2V- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 SP333 28 27 26 25 24 23 22 21 20 19 18 17 16 15 TI2 TI1 SD RS-232/Mac RI5 RX5 RX4 RX3 RX2 RX1 RI4 RI3 RI2 RI1 SP333 TYPICAL OPERATING CIRCUIT PC Mode (RS-232) Mac Mode (AppleTalk) +5V 9 0.1µF 0V 25 +5V +5V 0.1µF 5 V CC 10 RS-232/MacMode 12 V+ 14 11 VC2+ 26 Shutdown 13 C2- SP333 0.1µF 27 TI1 28 TI2 1 TI3 19 RX1 20 RX2 21 RX3 22 RX4 23 RX5 3 RXEN TGoddard/SP333/9617R0 9 0.1µF 0.1µF 0.1µF SP333 TX1 6 T1 T3 R1 R2 R3 R4 R5 0.1µF TX1 6 27 TI1 T2 0.1µF 5 V CC 25 10 RS-232/MacMode 12 V+ 14 11 VC2+ 26 Shutdown 13 C2- T1 TX2 7 2 TXEN TX3 4 1 TI3 RI1 15 T3 19 RX1 TX2 7 TX3 4 RI2 16 R1 RI1 15 RI2 16 RI3 17 21 RX3 R3 RI3 17 RI4 18 RI5 24 GND 23 RX5 8 3 SP333 RS-232/AppleTalk Programmable Transceiver 11 RXEN R5 RI5 24 GND 8 © Copyright 2000 Sipex Corporation PACKAGE: PLASTIC SMALL OUTLINE (SOIC) E H D A Ø e B DIMENSIONS (Inches) Minimum/Maximum (mm) A1 L 28–PIN A 0.093/0.104 (2.352/2.649) A1 0.004/0.012 (0.102/0.300) B 0.013/0.020 (0.330/0.508) D 0.697/0.713 (17.70/18.09) E 0.291/0.299 (7.402/7.600) e 0.050 BSC (1.270 BSC) H 0.394/0.419 (10.00/10.64) L 0.016/0.050 (0.406/1.270) Ø 0°/8° (0°/8°) TGoddard/SP333/9617R0 SP333 RS-232/AppleTalk Programmable Transceiver 12 © Copyright 2000 Sipex Corporation ORDERING INFORMATION Model Temperature Range Package Types SP333CT .............................................................................. 0˚C to +70˚C ......................................................................................... 28-Pin SOIC SP333ET ............................................................................. -40˚C to +85˚C ........................................................................................ 28-Pin SOIC Corporation SIGNAL PROCESSING EXCELLENCE Sipex Corporation Headquarters and Sales Office 22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: [email protected] Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others. TGoddard/SP333/9617R0 SP333 RS-232/AppleTalk Programmable Transceiver 13 © Copyright 2000 Sipex Corporation