ET7272 ICHAUS | Alldatasheet
Document overview
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Technical content
ETIC RESERVES THE RIGHT TO MAKE CHANGES AT ANY TIME TO IMPROVE THE DESIGN AND TO SUPPLY THE BEST PRODUCT. ©2000, Rev A1 iC-Haus GmbH Tel +49-6135-9292-0 Integrated Circuits Fax +49-6135-9292-192 Am Kuemmerling 18, D-55294 Bodenheim http://www.ichaus.com Page 1 of 3
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 QUAD DIFFERENTIAL LINE DRIVER WITH SEPARATE LOGIC BIAS AND DRIVER BIAS SUPPLIES, AND ENABLE FUNCTION ET7272
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.
APPLICATIONS
- Optical Encoders
- Industrial Controls ABSOLUTE MAXIMUM RATINGS Parameter Symbol Min. Max. Units Ref. Operating Temperature Range TA -55 115 °C Supply Voltage Range(both) VCC 4.5 30 V
ETIC RESERVES THE RIGHT TO MAKE CHANGES AT ANY TIME TO IMPROVE THE DESIGN AND TO SUPPLY THE BEST PRODUCT. ©2000, Rev A1 iC-Haus GmbH Tel +49-6135-9292-0 Integrated Circuits Fax +49-6135-9292-192 Am Kuemmerling 18, D-55294 Bodenheim http://www.ichaus.com Page 2 of 3
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, TA = 25°C and EN- <0.8V. Parameters Symbol Min. Typ. Max. Units Test Conditions Overtemp Operate Point (junction)1 TJOP 172 °C Overtemp Release Point (junction)1 TJRP 136 °C Vcc Bias Voltage Range Vcc B 3.5 5 30 V Vcc Drivers Voltage Range Vcc D 4.5 5 30 V Supply Current VccB1 (BIAS) Icc B1 11.9 16.0 mA Vcc B and VccD = 5V Supply Current VccD 1 (DRIVERS )I CCD 1 2.4 3.3 mA Vcc B and VccD = 5V Supply Current VccB2 Icc B2 2.5 3.4 mA Vcc B and VccD = 5V, EN- > 2V Supply Current VccD 2I CCD 2 0.0 0.1 mA Vcc B and VccD = 5V, EN- > 2V Supply Current VccB3 Icc B3 12.1 18.5 mA Vcc B and VccD = 30V Supply Current VccD 3I CCD 3 2.4 3.3 mA Vcc B and VccD = 30V Supply Current VccB4 Icc B4 2.6 3.5 mA Vcc B and VccD = 5V, EN- > 2V Supply Current VccD 4I CCD 4 0.0 0.1 mA Vcc B and VccD = 5V, EN- > 2V Enable Input Threshold V THE 0.8 1.5 2 V Enable Low Level Input Current IILE -10 0 10 µA V IN = 0V, VccB = 5V Enable High Level Input Current IIHE - 108 150 µA V IN = 5V, VccB = 5V High Impedance Output Leakage I OZ -4.0 0.0 4.0 µA Vcc D =30V, EN- > 2V, Output at 15V Input Positive-Going Threshold VT+ 1.05 1.25 1.45 V Vcc B = 5V Input Negative-Going Threshold VT- 0.75 0.95 1.15 V Vcc B = 5V Input Hysteresis V H - 0.3 - V Vcc B = 5V Low Level Input Current I IL -0.1 -4.0 µA V IN = 0V, VccB = 5V High Level Input Current I IH 0 4.0 µA V IN = 5V, VccB = 5V Low Level Output1 V OL 1 375 500 mV I OL = 20mA, VccD = 5V Low Level Output2 V OL 2 370 500 mV I OL = 20mA, VccD =30V High Level Output1 V OH 1 2.4 2.8 V I OH = -20mA, VccD = High Level Output2 V OH 2 27.7 28.1 V I OH = -20mA, VccD =30V
ETIC RESERVES THE RIGHT TO MAKE CHANGES AT ANY TIME TO IMPROVE THE DESIGN AND TO SUPPLY THE BEST PRODUCT. ©2000, Rev A1 iC-Haus GmbH Tel +49-6135-9292-0 Integrated Circuits Fax +49-6135-9292-192 Am Kuemmerling 18, D-55294 Bodenheim http://www.ichaus.com Page 3 of 3 AC SWITCHING CHARACTERISTICS Values given at VCC B = 5V, VCC D = 24V, TA = 25°C, C L = 1000pF on all outputs, and EN- <0.8V. Parameters Symbol Min. Typ. Max Units Test Conditions Propagation delay, rising input 50% point to zero crossing of differential outputs T PLH 450 630 ns Propagation delay, falling input 50% point to zero crossing of differential outputs T PHL 450 630 ns Output Rise Time T R 700 980 ns Output Fall Time T F 700 980 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 SUFFIX Chip Only -C