sp331 Exar Corporation, sp331 Datasheet
sp331
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sp331 Summary of contents
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... The SP331 is a programmable RS-232 and/or RS-485 transceiver IC. The SP331 contains four drivers and four receivers when selected in RS-232 mode; and two drivers and two receivers when selected in RS-485 mode. The SP331 also contains a dual mode which has two RS-232 drivers/receivers plus one differential RS-485 driver/receiver. ...
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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 ...
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Typically 25°C @ Vcc = +5V unless otherwise noted. RS-485 DRIVER Balance Common-Mode Output Output Current Short Circuit Current AC Characteristics Maximum Data Rate Output Transition Time Propagation Delay t PHL t PLH Driver Output Skew RS-485 RECEIVER DC Characteristics ...
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RECEIVER INPUT GRAPH –7V –0.6mA TEST CIRCUITS Figure 1. Driver DC Test Load Circuit 500Ω Output Under Test C L Figure 3. Driver Timing Test Load #2 Circuit Date: 03-04-05 RS-485 RECEIVER ...
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SWITCHING WAVEFORMS +3V DRIVER INPUT 0V B DRIVER OUTPUT DIFFERENTIAL O 0V OUTPUT – – SKEW DPLH DPHL Figure 4. Driver Propagation Delays +3V DE ...
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TTL Input Driver Output Figure 7. Typical RS-232 Driver Output Date: 03-04-05 Figure 8. Typical RS-485 Driver Output Programmable Dual RS-232/RS-485 Transceiver 6 © Copyright 2005 Sipex Corporation ...
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... SEL_B TX4 TX3 VCC TX1 TX2 GND C1+ V+ (VDD) C2+ C1– C2– V– (VSS) Figure 9. SP331 Pinout + C1+ VCC 0.1µF 12 C1- SP331 V+ 11 C2+ V- 0.1µ SEL A 2 SEL D SEL B 0V Vcc 400KΩ TX1 26 TI1 TTL/CMOS T1 Vcc 400KΩ ...
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... Table 1. Mode Function Table. (Refer to Control Logic Confirmations for Block Diagrams) THEORY OF OPERATION The SP331 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. Charge–Pump The charge pump is a Sipex–patented design (U ...
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– – – + – C –5V –5V 3 Figure 11. Charge Pump Phase + – ...
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... RS-485 receivers. All of the differential receivers can receive data up to 10Mbps. Select Mode Pins Similar to our SP500 family of multiprotocol products, the SP331 has the ability to change the configuration of the drivers and receivers via a 4–bit switch. Referring to Table 1; RS-232 mode, RS-485 mode, or two different combina- tions of RS-232/RS-485 can be configured us- ing the SEL_A and SEL_B pins ...
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... SP331 CONTROL LOGIC CONFIGURATION (Refer to Table SEL SEL SEL SEL D 26 TI1 TX1 T1 TX2 7 27 TI2 T2 28 TI3 TX3 T3 1 TI4 TX4 T4 19 RX1 RI1 RX2 RI2 RX3 RI3 RX4 ...
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Date: 03-04-05 PACKAGE: 28-PIN PLASTIC A DIMENSIONS (Inches) Minimum/Maximum 28–PIN (mm) 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 0.698/0.706 (17.73/17.93) 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) ...
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... SP331ET ........................................................................ -40°C to +85°C ........................................................................................... 28-pin WSOIC SP331ET/TR .................................................................. -40°C to +85°C ........................................................................................... 28-pin WSOIC Available in lead free packaging. To order add "-L" suffix to part number. Example: SP331ET/TR = standard; SP331ET-L/TR = lead free /TR = Tape and Reel Pack quantity is 1,500 for WSIOC. CLICK HERE TO ORDER SAMPLES ...