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| QUAD DIFFERENTIAL LINE DRIVER WITH SEPARATE LOGIC BIAS AND DRIVER BIAS SUPPLIES, AND ENABLE FUNCTION ET7272 FEATURES * * * * * * * * * Supply Voltage Range 3.5V to 30V Operation to 800KHz CMOS and TTL Compatible Inputs Separate logic bias and driver supply pins Optional single supply operation for moderate power applications High Impedance Buffered Inputs with Hysteresis may be driven directly by phototransistors Tri-State outputs 80mA peak SINK/SOURCE current Outputs Protected by Thermal Shut-Down APPLICATIONS * * Optical Encoders Industrial Controls DESCRIPTION These line drivers are pin compatible with 26LS31 in applications where pin 4 = 5V and pin 12 = GND. Internal clamp diodes allow trouble-free operation when driving cable lengths exceeding 100m. Split supplies are provided to minimize standby power dissipation in high voltage applications. The logic should be powered from a regulated 5V supply at the VccBias pin. The output stages may then be powered by a separate supply at VccDrivers, up to 30V. Output voltage swings of 0.3V to VCC-1.9V are typical. The outputs are protected against shorts to ground, shorts to Vcc and to other outputs, by a two-fold scheme of current limiting and thermal shutdown. This assures highly reliable operation in harsh environments. Heat-sinking may be accomplished at pin 8 which is directly connected to the ASIC substrate. ABSOLUTE MAXIMUM RATINGS Parameter Operating Temperature Range Supply Voltage Range(both) Symbol TA VCC Min. -55 4.5 Max. 115 30 Units C V Ref. ETIC RESERVES THE RIGHT TO MAKE CHANGES AT ANY TIME TO IMPROVE THE DESIGN AND TO SUPPLY THE BEST PRODUCT. (c)2000, Rev A1 iC-Haus GmbH Integrated Circuits Am Kuemmerling 18, D-55294 Bodenheim Page 1 of 3 Tel +49-6135-9292-0 Fax +49-6135-9292-192 http://www.ichaus.com ELECTRICAL CHARACTERISTICS Unless otherwise specified, TA = 25C and EN- <0.8V. Parameters Overtemp Operate Point (junction)1 Overtemp Release Point (junction)1 Vcc Bias Voltage Range Vcc Drivers Voltage Range Supply Current VccB1 (BIAS) Supply Current VccD1 (DRIVERS) Supply Current VccB2 Supply Current VccD2 Supply Current VccB3 Supply Current VccD3 Supply Current VccB4 Supply Current VccD4 Enable Input Threshold Enable Low Level Input Current Enable High Level Input Current High Impedance Output Leakage Input Positive-Going Threshold Input Negative-Going Threshold Input Hysteresis Low Level Input Current High Level Input Current Low Level Output1 Low Level Output2 High Level Output1 High Level Output2 Symbol TJOP TJRP VccB VccD IccB1 ICCD1 IccB2 ICCD2 IccB3 ICCD3 IccB4 ICCD4 VTHE IILE IIHE IOZ VT+ VTVH IIL IIH VOL1 VOL2 VOH1 VOH2 0.8 -10 -4.0 1.05 0.75 Min. Typ. 172 136 5 5 11.9 2.4 2.5 0.0 12.1 2.4 2.6 0.0 1.5 0 108 0.0 1.25 0.95 0.3 -0.1 0 375 370 2.8 28.1 Max. Units C C V V mA mA mA mA mA mA mA mA V A A A V V V A A mV mV V V Test Conditions 3.5 4.5 30 30 16.0 3.3 3.4 0.1 18.5 3.3 3.5 0.1 2 10 150 4.0 1.45 1.15 -4.0 4.0 500 500 VccB and VccD = 5V VccB and VccD = 5V VccB and VccD = 5V, EN- > 2V VccB and VccD = 5V, EN- > 2V VccB and VccD = 30V VccB and VccD = 30V VccB and VccD = 5V, EN- > 2V VccB and VccD = 5V, EN- > 2V VIN = 0V, VccB = 5V VIN = 5V, VccB = 5V VccD =30V, EN- > 2V, Output at 15V VccB = 5V VccB = 5V VccB = 5V VIN = 0V, VccB = 5V VIN = 5V, VccB = 5V IOL = 20mA, VccD = 5V IOL = 20mA, VccD =30V IOH = -20mA, VccD = 5V IOH = -20mA, VccD=30V 2.4 27.7 ETIC RESERVES THE RIGHT TO MAKE CHANGES AT ANY TIME TO IMPROVE THE DESIGN AND TO SUPPLY THE BEST PRODUCT. (c)2000, Rev A1 iC-Haus GmbH Integrated Circuits Am Kuemmerling 18, D-55294 Bodenheim Page 2 of 3 Tel +49-6135-9292-0 Fax +49-6135-9292-192 http://www.ichaus.com AC SWITCHING CHARACTERISTICS Values given at VCCB = 5V, VCCD = 24V, TA = 25C, CL = 1000pF on all outputs, and EN- <0.8V. Parameters Propagation delay, rising input 50% point to zero crossing of differential outputs Propagation delay, falling input 50% point to zero crossing of differential outputs Output Rise Time Output Fall Time Symbol TPLH TPHL TR TF Min. Typ. 450 Max . 630 Units ns Test Conditions 450 630 ns 700 700 980 980 ns ns NOTES: 1. This is not a test parameter, but for information only. 2. It may be necessary to clamp the outputs with Schottky diodes when driving extemely long cables with high capacitance between outputs. These diodes should have a forward voltage of less than 0.4V, and be connected with cathode to the output and anode to ground. PACKAGE Chip Only 16 Lead SOIC SUFFIX -C -SOP ETIC RESERVES THE RIGHT TO MAKE CHANGES AT ANY TIME TO IMPROVE THE DESIGN AND TO SUPPLY THE BEST PRODUCT. (c)2000, Rev A1 iC-Haus GmbH Integrated Circuits Am Kuemmerling 18, D-55294 Bodenheim Page 3 of 3 Tel +49-6135-9292-0 Fax +49-6135-9292-192 http://www.ichaus.com |
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