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| ST3293 RS-422 HIGH SPEED TRANSCEIVER WITH DIGITAL EMPHASIS s s s s s FULL DUPLEX COMMUNICATIONS DEVICE RS-422 PROGRAMMABLE EMPHASIS INCREASES THE DISTANCE AND DATA RATE HIGH SPEED: DATA RATE UP TO 25Mbps -7V TO 7V COMON-MODE INPUT VOLTAGE RANGE LVTTL LOGIC INPUT THRESHOLDS SOP DESCRIPTION The ST3293 is a high-speed RS-422 transceiver with an emphasis circuitry on the driver which allows reliable long distance communication at high data rate by reducing inter symbolic interference. The differential amplitude of the ST3293 is digitally programmable in 7 steps through 3 control pins. The emphasis reduces the inter symbolic interference by increasing the signal amplitude under the micro control and counteracting the effects of the cable with the varying data stream. The ST3293 is a full duplex device that operates from a single +5V supply. It ORDERING CODES Type ST3293BD ST3293BDR Temperature Range -40 to 85 C -40 to 85 C Package features driver output short circuit current limiting and an open circuit fail-safe receiver input. The PE input can be used as an emphasis enable. The PE held LOW disable the emphasis instead set to HIGH enable the emphasis with the configuration on C0, C1 and C2 when DI change logic level. The DI input can direct drive the outputs with a fixed emphasis or without emphasis as shown in the timing diagram. Comments 50 parts per tube / 20 tube per box 2500 parts per reel SO-14 (Tube) SO-14 (Tape & Reel) January 2003 1/11 ST3293 PIN CONFIGURATION PIN DESCRIPTION PlN N 1 2 3 4 5 6 7 8 9 10 11 12 13 14 SYMBOL C0 C1 C2 PVCC RO DI PGND Y Z B A PE LGND LVCC Emphasis Control Input 0 Emphasis Control Input 1 Emphasis Control Input 2 Supply Voltage Receiver Output Driver Input Ground Non-inverting Driver Output Inverting Driver Output Inverting Receiver Input Non-inverting Receiver Input Emphasis Enable Ground Supply Voltage NAME AND FUNCTION TRUTH TABLE TRANSMITTING INPUTS INPUTS PE L H H X= Don't Care; Z=High Impedance OUTPUTS EMPHASIS STATUS DI X 0->1 1->0 PECTRL L H H Disabled Enabled Enabled 2/11 ST3293 EMPHASIS CONTROL INPUT INPUTS PE = HIGH C0 L L L L H H H H C1 L L H H L L H H C2 L H L H L H L H DRIVER EMPHASIS FACTOR (DEF) RL = 100 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 ABSOLUTE MAXIMUM RATINGS Symbol VCC Supply Voltage C0, C1, Control Input Voltage C2, DI, PE Y, Z A, B RO PD TJ Tstg ESD Driver Output Voltage VCC = 0V or VOUT = Z-state Receiver Input Voltage Receiver Output Voltage Continuous Total Power Dissipation (SO-14) Operating Junction Temperature Range Storage Temperature Range Human Boby Model (Receiver Inputs vs GND) Parameter Value -0.5 to 7 -0.5 to 7 -0.5 to 7 -14 to 14 -0.5 to (VCC + 0.5) 0.5 -40 to 150 -65 to 150 1 Unit V V V V V W C C KV Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. RECOMMENDED OPERATING CONDITIONS Symbol VCC VIH VIL IIN ICC TA Parameter Supply Voltage High Level Logic Input Voltage Low Level Logic Input Voltage Input Current of Logic Input Supply Current Operating Temperature Range C0, C1, C2, DI, PE C0, C1, C2, DI, PE C0, C1, C2, DI, PE No Load -40 Test Conditions Min. 4.75 2 0 Typ. Max. 5.25 VCC 0.8 2 4 85 Unit V V V A mA C 3/11 ST3293 DRIVER ELECTRICAL CHARACTERISTICS (VCC = 5V 5%, -40C < TA < 85C, unless otherwise noted. Typical values are referred to Ta = 25C) Symbol |VOD| |VOD1| DPER DEF |VOPD| VOD VOC VOC Parameter Differential Output Voltage Differential Output Voltage without Emphasis Differential Output Emphasis Step Precision Differential Output Emphasis Factor Differential Driver Output with Emphasis Change in Magnitude of Differential Output Voltage Driver Common-Mode Output Voltage Change in Magnitude of Common Mode Output Voltage Output Leakage Current (Y and Z) Driver Short Circuit Output Current No Load R = 100 , PE = Low See Truth Table See Truth Table R = 100 , DEF = 1.1 R = 100 , DEF = 1.7 R = 100 , All DEF values R = 100 , All DEF values R = 100 Test Conditions Min. 2 2 0.9 1 2.52 3.85 0 VCC/2 0 2.32 Typ. Max. VCC 2.8 1.1 2 V 0.2 3.5 0.2 V V V Unit V V -0.2 1 -0.2 IOFF IOSD VCC = GND VO = 6V VO = 0V, C0 = C1 = C2 = 0 -30 0.1 -50 100 -150 A mA RECEIVER DC ELECTRICAL CHARACTERISTICS (VCC = 5V 5%, -40C < TA < 85C, unless otherwise noted. Typical values are referred to Ta = 25C) Symbol VTH VHYST VOL VOH IIN RIN Parameter Receiver Differential Threshold Voltage Receiver Input Hysteresis Low Level Output Voltage High Level Output Voltage Input Current Receiver Input Resistance Test Conditions -7V VCM 7V VCM = 0V IOL = 4mA IOH = -4mA VIN=10V, Other Input = GND VIN=10V, Other Input = GND -7V VCM 7V, VCC = 0V 12 GND 3.7 Min. -200 50 0.2 4.7 0.32 -0.5 24 0.4 VCC 1.5 -2.5 K Typ. Max. 200 Unit mV mV mV mV mA 4/11 ST3293 SWITCHING CHARACTERISTICS (VCC = 5V 5%, -40C < TA < 85C, unless otherwise noted. Typical values are referred to Ta = 25C) Symbol tDPLH tDPHL Parameter Test Conditions RDIFF = 100 CL1 = CL2 = 50pF RDIFF = 100 CL1 = CL2 = 50pF RDIFF = 100 CL1 = CL2 = 50pF |DO|-200mV RDIFF = 100 CL1 = CL2 = 50pF RDIFF = 100 CL1 = CL2 = 50pF RDIFF = 100 CL1 = CL2 = 50pF 25 Min. Typ. 16 Max. 25 Unit ns Driver Differential Propagation Delay, Low to High and High to Low tTLH, tTHL Driver Differential rise and fall time Propagation delay time tEDO from PE, C0, C1, C2 to differential output without emphasis Setup Time PE to DI ts th tDSKEW fMAX Hold Time PE to DI Differential Driver Output Skew |tdPLH-tdPHL| Maximum Frequency 8 12 45 ns ns -8 8 1.5 40 28 2 45 4 3 ns ns ns Mbps ns ns RDIFF = 100 CL1 = CL2 = 50pF tRLH, tRHL Receiver Propagation Delay CL = 15pF, VID = 2V, VCM = 0V CL = 15pF tRSKEW Receiver Output Skew |tRLH-tRHL| 5/11 ST3293 LOGIC DIAGRAM Figure 1 : Test Circuit 6/11 ST3293 Figure 2 : Figure 3 : Figure 4 : 7/11 ST3293 Figure 5 : Figure 6 : Figure 7 : 8/11 ST3293 SO-14 MECHANICAL DATA DIM. A a1 a2 b b1 C c1 D E e e3 F G L M S 3.8 4.6 0.5 8.55 5.8 1.27 7.62 4.0 5.3 1.27 0.68 8 (max.) 0.149 0.181 0.019 8.75 6.2 0.35 0.19 0.5 45 (typ.) 0.336 0.228 0.050 0.300 0.157 0.208 0.050 0.026 0.344 0.244 0.1 mm. MIN. TYP MAX. 1.75 0.2 1.65 0.46 0.25 0.013 0.007 0.019 0.003 MIN. inch TYP. MAX. 0.068 0.007 0.064 0.018 0.010 PO13G 9/11 ST3293 Tape & Reel SO-14 MECHANICAL DATA mm. DIM. MIN. A C D N T Ao Bo Ko Po P 6.4 9 2.1 3.9 7.9 12.8 20.2 60 22.4 6.6 9.2 2.3 4.1 8.1 0.252 0.354 0.082 0.153 0.311 TYP MAX. 330 13.2 0.504 0.795 2.362 0.882 0.260 0.362 0.090 0.161 0.319 MIN. TYP. MAX. 12.992 0.519 inch 10/11 ST3293 ormation furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the nsequences of use of such information nor for any infringement of patents or other rights of third parties which may result from use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications entioned in this publication are subject to change without notice. This publication supersedes and replaces all information eviously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or stems without express written approval of STMicroelectronics. (c) The ST logo is a registered trademark of STMicroelectronics (c) 2003 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES ustralia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. (c) http://www.st.com 11/11 |
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