SP334ET

SP334 SIPEX | Alldatasheet

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SP334DS/10 Programmable RS-232/RS-485 Transceiver © Copyright 2000 Sipex Corporation SP334 Programmable RS-232/RS-485 Transceiver n +5V Only Operation n Software Programmable RS-232 or RS-

485 Selection

n Three RS-232 Drivers and Five Receivers in RS-232 Mode n Two RS-485 Full-Duplex Transceivers in RS-485 Mode n Full Differential Driver Tri-State (Hi-Z) Control n Receiver Output Tri-State Control DESCRIPTION… The SP334 is a programmable RS-232 and/or RS-485 transceiver IC. The SP334 contains three drivers and five receivers when selected in RS-232 mode; and two drivers and two receivers when selected in RS-485 mode. The RS-232 transceivers can typically operate at 230kbps while adhering to the RS-232 specifications. The RS-485 transceivers can operate up to 10Mbps while adhering to the RS-485 specifications. The RS-485 drivers can be disabled (High-Z output) by the TXEN enable pin. The RS-232 and RS-485 receiver outputs can be disabled by the RXEN enable pin. TI3 TXEN(n/c) TX4(n/c) TX3 VCC TX1 TX2 GND C1+ C2+ C1– C2– TI2 TI1 RXEN RS232/RS485 RI5 RX5 RX4 RX3 RX2 RX1 RI4 RI3 RI2 RI1 SP334 (in RS-232 mode)

SP334DS/10 Programmable RS-232/RS-485 Transceiver © 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. V Power Dissipation Package Derating: 28-pin Plastic DIP ø 28-pin Plastic SOIC SPECIFICATIONS Typically 25°C @ Vcc = +5V unless otherwise noted. MIN. TYP. MAX. UNITS CONDITIONS LOGIC INPUTS VIL 0.8 Volts VIH 2.0 Volts LOGIC OUTPUTS VOL 0.4 Volts I OUT = -3.2mA VOH 2.4 Volts I OUT = 1.0mA Output Tri-state Leakage 10 µA 0.4V ≤ VOUT ≤ +2.4V RS-232 DRIVER DC Characteristics HIGH Level Output +5.0 +15 Volts R L=3kΩ , VIN=0.8V LOW Level Output –15.0 –5.0 Volts R L=3kΩ , VIN=2.0V Open Circuit Voltage –15 +15 Volts Short Circuit Current ±100 mA V OUT = 0V Power Off Impedance 300 Ω Vcc = 0V, Vout = ±2.0V AC Characteristics Slew Rate 30 V/ µsR L=3kΩ , CL= 50pF VCC = +5.0V, TA @ +25°C Transition Time 1.56 µsR L=3kΩ , CL=2500pF ; between ±3V, TA @ +25°C Maximum Data Rate 120 235 kbps R L=3kΩ , CL=2500pF Propagation Delay t PHL 28 µs Measured from 1.5V of V IN tPLH 28 µs to 50% of V OUT ; R L=3kΩ RS-232 RECEIVER DC Characteristics HIGH Threshold 1.7 3.0 Volts LOW Threshold 0.8 1.2 Volts Receiver Open Circuit Bias +2.0 Volts Input Impedance 3 5 7 k Ω V IN = +15V to –15V AC Characteristics Maximum Data Rate 120 235 kbps Propagation Delay t PHL 0.25 1 µs Measured from 50% of V IN tPLH 0.25 1 µs to 1.5V of V OUT . RS-485 DRIVER DC Characteristics Open Circuit Voltage 6.0 Volts Differential Output 1.5 5.0 Volts R L=54Ω , CL=50pF

SP334DS/10 Programmable RS-232/RS-485 Transceiver © Copyright 2000 Sipex Corporation SPECIFICATIONS Typically 25°C @ Vcc = +5V unless otherwise noted. MIN. TYP. MAX. UNITS CONDITIONS RS-485 DRIVER Balance ±0.2 Volts |V T| - |VT| Common-Mode Output 3.0 Volts Output Current 28.0 mA R L=54Ω Short Circuit Current ±250 mA Terminated in –7V to +10V AC Characteristics Maximum Data Rate 10 Mbps R L=54Ω Output Transition Time 30 ns Rise/fall time, 10%–90% Propagation Delay See Figures 3A & 5 t PHL 80 120 ns R DIFF=54Ω , CL1=C L2=100pF tPLH 80 120 ns R DIFF=54Ω , CL1=C L2=100pF Driver Output Skew 5 20 ns per figure 5, t SKEW = |tDPLH - tDPHL | RS-485 RECEIVER DC Characteristics Inputs Common Mode Range –7.0 +12.0 Volts Receiver Sensitivity ±0.2 Volts –7V ≤ V CM ≤ +12V Input Impedance 12 15 k Ω –7V ≤ VCM ≤ +12V AC Characteristics Maximum Data Rate 10 Mbps Propagation Delay See Figures 3A & 7 t PHL 130 200 ns R DIFF=54Ω , CL1=C L2=100pF tPLH 130 200 ns R DIFF=54Ω , CL1=C L2=100pF Differential Receiver Skew 10 20 ns t SKEW = | tPLH – tPHL |; RDIFF=54Ω , CL1=CL2=100pF, see Figure 8 ENABLE TIMING RS-485 Driver Enable Time See Figures 4 & 6 Enable to Low 100 150 ns C L=15pF, S1 Closed Enable to High 100 150 ns C L=15pF, S2 Closed Disable Time See Figures 4 & 6 Disable From Low 100 120 ns C L=15pF, S1 Closed Disable From High 100 120 ns C L=15pF, S2 Closed RS-485 Receiver Enable Time See Figures 2 & 8 Enable to Low 100 150 ns C L=15pF, S1 Closed Enable to High 100 150 ns C L=15pF, S2 Closed Disable Time See Figures 2 & 8 Disable From Low 100 120 ns C L=15pF, S1 Closed Disable From High 100 120 ns C L=15pF, S2 Closed POWER REQUIREMENTS Supply Voltage VCC +4.75 +5.25 Volts Supply Current ICC No Load (Tx Disabled) 12 20 mA TXEN = 0V No Load (RS-232 Mode) 20 50 mA RS232/RS485 = 0V No Load (RS-485 Mode) 15 50 mA RS232/RS485 = +5V ENVIRONMENTAL Operating Temperature Commercial (..C..) 0 +70 °C Industrial (..E..) –40 +85 °C Storage Temperature –65 +150 °C

Figure 1. Driver DC Test Load Circuit Figure 2. Receiver Timing Test Load Circuit

1 Unit Load

Figure 12. Typical Operating Circuit Figure 11. SP334 Pinout

18 RS-232

3 N/CN/C 2

SP334DS/10 Programmable RS-232/RS-485 Transceiver © Copyright 2000 Sipex Corporation outputs. The drivers can only be tri-stated in RS-485 mode. The drivers are always active in RS-232 mode. The receiver outputs can also be tri-stated by use of the RXEN pin. A logic LOW will enable the receiver outputs and a logic HIGH will tri-state the outputs. The receiver tri-state capability is offered for both RS-232 and RS-485 modes. The input impedance if the receivers during tri-state is at least 12kΩ .

Applications

The SP334 allows the user flexibility in having a RS-232 or RS-485 serial port without using two different discrete active ICs. Figure 18 shows a connection to a standard DB-9 RS-232 connector. In RS-485 mode, the SP334 is a full duplex transceiver, however, a half duplex configuration can be made by connecting the driver outputs to the receiver inputs. +5V GND CTS TxD RTS 0.1µF 0.1µF VCC DTR RxD TX1 TX2 TX3 RI1 TI1 TI2 TI3 RX1 RX5 RX4 RX3 RX2 RI5 RI4 RI3 RI2 19 15 100.1µF 0.1µF C1+ C1- C2+ C2- 20 16 RS232/RS485 400KΩ Vcc 400KΩ Vcc 400KΩ Vcc DSR DCD RI 5KΩ 5KΩ 5KΩ 5KΩ SP334 5KΩ RXEN 26 TxD DTR RTS RxD CTS DSR DCD RI SG Figure 18. SP334 Configuration to a DB-9 Serial Port receivers can receive data up to 10Mbps.

SP334DS/10 Programmable RS-232/RS-485 Transceiver © Copyright 2000 Sipex Corporation D EH PACKAGE: 28-PIN PLASTIC SMALL OUTLINE (SOIC) DIMENSIONS (Inches) Minimum/Maximum (mm) A Ø LBe A B D E e H L Ø 28–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) 0.698/0.706 (17.73/17.93) 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°)

SP334DS/10 Programmable RS-232/RS-485 Transceiver © Copyright 2000 Sipex Corporation

ORDERING INFORMATION

Model Temperature Range Package Types 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. Corporation SIGNAL PROCESSING EXCELLENCE Please consult the factory for pricing and availability on a Tape-On-Reel option. Sipex Corporation Headquarters and Sales Office

22 Linnell Circle

Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com Sales Office

233 South Hillview Drive

Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600