ET7272中文资料.pdfVIP

元器件交易网 QUAD DIFFERENTIAL LINE DRIVER ET7272 WITH SEPARATE LOGIC BIAS AND DRIVER BIAS SUPPLIES, AND ENABLE FUNCTION 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 Symbol Min. Max. Units Ref.