IC_TEST_CLlP

Published:2009/7/11 2:28:00 Author:May | From:SeekIC

Provides in-circuit testing for all types of 16-pin ICs. LED array indicates logic status of each IC pin. Circuit uses Texas Instruments TID125 diode arrays on test clip to determine pin with highest voltage (VCC)and pin with lowest voltage (GND). These pins are then used to supply power to LEDs. No batteries are needed. Position of clip on IC is unimportant. On 14-pin ICs, disregard LEDs for two unused pins. Circuit can be expanded for 24- or 40-pin ICs, although adding LEDs makes clip more difficult to use.-J. Errico and R. Baker, Powerless IC Test Clip, BYTE, Dec. 1975, p 26-27.



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