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| CA3242 August 1998 Quad-Gated Inverting Power Driver For Interfacing Low-Level Logic to High Current Load Description The CA3242 quad-gated inverting power driver contains four gate switches for interfacing low-level logic to inductive and resistive loads such as: relays, solenoids, AC and DC motors, heaters, incandescent displays, and vacuum fluorescent displays. Output overload protection is provided when the load current (approximately 1.2A) causes the output VCE(sat) to rise above 1.3V. A built-in time delay, nominally 25s, is provided during output turn-on as output drops from VDD to VSAT. That output will be shut down by its protection network without affecting the other outputs. The corresponding Input or Enable must be toggled to reset the output protection circuit. Steering diodes in the outputs in conjunction with external zener diodes protect the IC against voltage transients due to switching inductive loads. To allow for maximum heat transfer from the chip, the four center leads are directly connected to the die mounting pad. In free air, junction-to-air thermal resistance (RJA) is 60oC/W (typical). This coefficient can be lowered by suitable design of the PC board to which the CA3242 is soldered. Features * Driven Outputs Capable of Switching 600mA Load Currents Without Spurious Changes in Output State * Inputs Compatible with TTL or 5V CMOS Logic * Suitable for Resistive or Inductive Loads * Output Overload Protection * Power-Frame Construction for Good Heat Dissipation Applications * Relays * Solenoids * AC and DC Motors * Heaters * Incandescent Displays * Vacuum Fluorescent Displays Ordering Information PART NUMBER CA3242E TEMPERATURE RANGE -40oC to +105oC PACKAGE 16 Lead Plastic DIP Pinout CA3242 (PDIP) TOP VIEW Block Diagram P IN D 9 7 IN C 10 P VCC 11 GND 12 GND 13 ENABLE 14 P 5 4 3 GND GND 6 OUT C CLAMP 8 OUT D OUT A 1 CLAMP 2 OUT B 3 GND 4 GND 5 OUT C 6 CLAMP 7 OUT D 8 16 IN A 15 IN B 14 ENABLE 13 GND 12 GND 11 VCC 10 INC 9 IND TRUTH TABLE ENABLE H H L IN H L X OUT L H H OUT B CLAMP 2 IN B 15 IN A 16 P 1 OUT A CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 407-727-9207 | Copyright (c) Intersil Corporation 1999 File Number 1561.2 2-3 |
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