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ET7272B

QUAD DIFFERENTIAL LINE DRIVER SEPARATE LOGIC BIAS AND DRIVER BIAS, WITH TRI-STATE OUTPUTS

These line drivers are pin compatible with 26LS31 in applications where pin 4 = 5V and pin 12 = GND. Use in RS-422 type applications is common. 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 output stages may be powered by a supply at VccDrivers, up to 30V. 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 is aided by having pin 8 directly connected to the ASIC substrate inside the package. The outputs may be placed into a high impedance state by application of a logic high at the EN- pin. For normal operation, this pin should be at logic low or grounded.

 

ET7272B