SP508CF-L Exar Corporation, SP508CF-L Datasheet
SP508CF-L
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SP508CF-L Summary of contents
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Rugged 20Mbps, 8 Channel Multi-Protocol Transceiver with Programmable DCE/DTE and Termination Resistors FEATURES • 20Mbps Differential Transmission Rates • 5kV ESD Tolerance for Analog I/Os • Internal Transceiver Termination Resistors for V./V.35 • Interface Modes: – RS-232 (V.28) – EIA-530 (V.0 & V.) – X.2 (V.) – EIA-530A (V.0 & V.) – RS-449/V.36 – V.35 (V.0 & V.) • Software Selectable Protocols with 3-Bit Word • Eight Drivers and Eight Receivers • V.35/V. Receiver Termination Network Disable Option • Internal Line or Digital Loopback Testing • Adheres to NET/NET2 and TBR-2 Requirements The SP508 is a monolithic device that supports eight (8) popular serial interface standards for Wide Area Network (WAN) connectivity. The SP508 is fabricated using a low power BiCMOS process technology, and incorporates an Exar regulated charge pump allowing +5V only operation. Exar's patented charge pump provides a regulated output of +5.8V, which will provide enough voltage for compliant operation in all modes. Eight (8) drivers and eight (8) receivers can be configured via software for ...
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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 .................................................................................................+7V CC Input Voltages: Logic ................................................ -0. Drivers . ............................................. -0. Receivers .............................................................±5.5V Output Voltages: Logic ................................................ -0. Drivers . ....................................................................±2V Receivers ......................................... -0. ...
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T = 0°C to +70°C and V = +4.75V to +5.25V unless otherwise noted. The ♦ denotes the specifications which applies to full temperature range -40°C to =+85°C, unless otherwise specified. PARAMETER V.28 RECEIVER (cont ) AC Parameters (cont.) Max.Transmission Rate V.10 DRIVER DC Parameters Outputs Open Circuit Voltage Test-Terminated Voltage Short-Circuit Current ...
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T = 0°C to +70°C and V = +4.75V to +5.25V unless otherwise noted. The ♦ denotes the specifications which applies to full temperature range -40°C to =+85°C, unless otherwise specified. PARAMETER V.11 RECEIVER (cont) DC Parameters (cont.) Input Current Current w/ 100Ω Termination Input Impedance AC Parameters Propagation Delay ...
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T = +25°C and V = +5.0V unless otherwise noted PARAMETER DRIVER DELAY TIME bETWEEN ACTIVE MODE AND TRI-STATE MODE RS-232/V. Tri-state to Output LOW PZL t ; Tri-state to Output HIGH PZH t ; Output LOW to Tri-state PLZ t ; Output HIGH to Tri-state PHZ RS-423/V. Tri-state to Output LOW PZL t ; Tri-state to Output HIGH PZH t ; Output LOW to Tri-state PLZ t ; Output HIGH to Tri-state ...
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T = +25°C and V = +5.0V unless otherwise noted PARAMETER RS-422/V. Tri-state to Output LOW PZL t ; Tri-state to Output HIGH PZH t ; Output LOW to Tri-state PLZ t ; Output HIGH to Tri-state PHZ V. Tri-state to Output LOW PZL t ; Tri-state to Output HIGH PZH t ; Output LOW to Tri-state PLZ t ; Output HIGH to Tri-state PHZ TRANSCEIVER TO TRANSCEIVER SkEw RS-232 Driver RS-232 Receiver RS-422 Driver ...
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VCC 1 GND 2 SDEN 3 TTEN 4 STEN 5 RSEN 6 TREN 7 RRCEN 8 RLEN 9 LLEN 10 RDEN 11 RTEN 12 TXCEN 13 CSEN 14 DMEN 15 RRTEN 16 ICEN 17 TMEN ...
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Pin Number Pin Name Description VCC 5V Power Supply Input 2 GND Signal Ground 3 SDEN TxD Driver Enable Input 4 TTEN TxCE Driver Enable Input 5 STEN ST Driver Enable Input 6 RSEN RTS Driver Enable Input 7 TREN DTR Driver Enable Input 8 RRCEN DCD Driver Enable Input 9 RLEN RL Driver Enable Input ...
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A C Figure . V.28 Driver Output Open Circuit Voltage Figure 3. V.28 Driver Output Slew Rate Figure 5. V.28 Driver Output Power-Off Impedance Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com SP508_00_02709 V OC Figure 2. V.28 Driver Output Loaded Voltage V Oscilloscope T Scope used for slew rate measurement. Figure 4. V.28 Driver Output Short-Circuit Current I x ±2V Figure 6. V.28 Driver Output Rise/Fall Times 0 TEST CIRCUITS ...
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A C Figure 7. V.28 Receiver Input Impedance A 3.9k C Figure 9. V.0 Driver Output Open-Circuit Voltage A C Figure . V.0 Driver Output Short-Circuit Current Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com SP508_00_02709 I ia ±15V Figure 8. V.28 Receiver Input Open Circuit Bias V OC Figure 0. V.0 Driver Output Test Terminated Volt Figure 2. V.0 Driver Output Power-Off Current 450 ...
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A 450 C Figure 3. V.0 Driver Output Transition Time V.10 RECEIVER -10V -3V +3V Maximum Input Current vesus Voltage -3.25mA Figure 5. V.0 Receiver Input IV Graph Figure 7. V. Driver Output Test Terminated Voltage Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com SP508_00_02709 Oscilloscope Figure 4. V.0 Receiver Input Current +3.25mA +10V Figure 6. V. Driver Output Open-Circuit Voltage Figure 8. V. Driver Output Short-Circuit Current ...
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Figure 9. V. Driver Output Power-Off Current A Oscilloscope B C Figure 2. V. Driver Output Rise/Fall Time Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com SP508_00_02709 I xa ±0.25V ±0.25V I xb Figure 20. V. Receiver Input Current 50 50 -10V -3.25mA Figure 22. V. Receiver Input IV Graph 3 A ...
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100 to 150 100 to 150 Figure 23. V. Receiver Input Current w/ Termination Figure 26. V.35 Driver Output Offset Voltage Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com SP508_00_02709 ±6V i [mA [ 4.0 i [mA [V] / 0.1 Figure 24. V. Receiver Input Graph w/ Termination ...
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Figure 28. V.35 Driver Output Short-Circuit Impedance Figure 30. V.35 Receiver Input Source Impedance Any one of the three conditions for disabling the driver Logic “1” B ...
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S 500 Output Under Test Figure 34. Driver Timing Test Load Circuit +3V DRIVER INPUT 0V A DRIVER OUTPUT B + DIFFERENTIAL V O OUTPUT 0V – – SKEW = DPLH - ...
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DECx +3V RCVR 0V ENABLE 5V RECEIVER OUT RECEIVER OUT 0V Figure 39. Receiver Enable and Disable Times +3V Tx_Enable OUT V OL +3V Tx_Enable OUT 0V Figure 40. V.28 (RS-232) and V.0 (RS-423) Driver Enable and Disable Times Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com SP508_00_02709 f = 1MHz; t ...
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Figure 4. Typical V.28 Driver Output Waveform Figure 43. Typical V. Driver Output Waveform Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com SP508_00_02709 Figure 42. Typical V.0 Driver Output Waveform Figure 44. Typical V.35 Driver Output Waveform 8 ...
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VCC pins (1, 26, 45, 64, 71, 77, 80, 84, 88, 93, 98) GND pins (2, 25, 44, 52, 68, 74, 82, 86, 91, 96) N.C. pins (24 and 76) 1µF V35RGND RD(a) RxD RDEN RD(b) RT(a) RxC RTEN RT(b) ...
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The SP508 contains highly integrated serial transceivers that offer programmability between interface modes through software control. The SP508 offers the hardware interface modes for RS-232 (V.28), RS-449/ V.36 (V. and V.0), EIA-530 (V. and V.0), EIA-530A (V. and V.0), V.35 (V.35 and V.28) and X.2(V.). The interface mode selection is done via three control pins, which can be latched via microprocessor control. The SP508 has eight drivers, eight receivers, and Exar's patented on-board charge pump (5,306,954) that is ideally suited for wide area network connectivity and other multi-protocol applications. Other features include digital and line loopback modes, individual enable/disable control lines for each driver and receiver, fail- safe when inputs are either open or shorted, individual termination resistor ...
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The fourth type of drivers are V.35 differential drivers. There are only three available on the SP508 for data and clock (TxD, TxCE, and TxC in DCE mode). These drivers are current sources that drive loop current through a differential pair resulting in a 550mV differential voltage at the receiver. These drivers also incorporate fixed termination networks for each driver in order to set the V and V depending on load conditions This termination network is basically a “Y” configuration consisting of two 51Ω ...
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This resistor is invoked when the receiver is operating as a V. receiver, in modes EIA- 530, EIA-530A, RS-449/V.36, and X.2. The same receivers also incorporate a termina- tion network internally for V.35 applications. For V.35, the receiver input termination is a “Y” termination consisting of two 51Ω resis- tors connected in series and a 124Ω resistor connected between the two 50Ω resistors and V35RGND output. The V35RGND is usually grounded. The receiver itself is identical to the V. receiver. ...
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The charge pump cycle will continue as long as the operational conditions for the internal oscillator are present. Since both V and V are separately gener ated from no-load condition will be symmetrical. Older charge pump - approaches that generate V from decrease in the magnitude due to the inherent inefficiencies in + the design. The clock rate for the charge pump typically operates at 250kHz. The external capacitors can be as low as µF with a 6V breakdown voltage rating. TERM_OFF FUNCTION The SP508 contains a TERM_OFF pin that ...
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TxD RxD TxCE RxC ST TxC RTS CTS DTR DSR DCD_DCE DCD_DTE Figure 46. SP508 Loopback Path Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com SP508_00_02709 SD(a) SD(b) RD(a) RD(b) TT(a) TT(b) RT(a) RT(b) ST(a) ST(b) TxC(a) TxC(b) RS(a) RS(b) CS(a) CS(b) TR(a) TR(b) DM(a) ...
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Figure 47. SP508 Typical Operating Configuration to Serial Port Connector with DCE/DTE programmability Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com SP508_00_02709 25 ...
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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com SP508_00_02709 PACkAGE: 100 Pin LQFP 26 ...
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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com SP508_00_02709 27 ...
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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com SP508_00_02709 28 ...
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... Part Number Top Mark Temperature Range SP508CF-L . ................... SP508CFYYWW..........................0°C to +70°C ................................00 Lead LQFP SP508EF-L . ................... SP508EFYYWW.......................-40°C to +85°C ................................00 Lead LQFP DATE REVISION DESCRIPTION 0/9/05 -- Legacy Sipex Datasheet 0/27/09 .0.0 Convert to Exar Format and change revision to .0.0. Change Driver output leakage test (figure 32) from +/-12V to +/-0V. Change V. and V.35 driver and receiver propaga- tion delay limits from 60ns to 80ns EXAR Corporation reserves the right to make changes to any products contained in this publication in order to improve design, performance or reliabil- ity. EXAR Corporation assumes no representation that the circuits are free of patent infringement. Charts and schedules contained herein 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 ...