IT-7400 Digital IC Tester The Heathkit IT-7400 Digital IC Tester is a unique piece of test instrument for checking either +3.5 VDC or +5 VDC logic states for RTL, DTL, ECL, TTL, or CMOS integrated circuits. Both 14-pin and 16-pin dual-in-line IC’s can be tested by the use of a zero-insertion-force socket. Each test socket pin has the option of either being open, or a positive DC voltage or ground input, that can also be manually pulsed, or an external banana jack connection. High logic levels are indicated by a lighted indicator lamp. There is also the capability for testing IC’s that can drive gas discharge (cold cathode) type displays. SPECIFICATIONS Testing Capability . . . . . . . . . . . . . RTL, DTL, TTL, ECL and CMOS 14 OR 16-pin digital integrated circuits Indicators . . . . . . . . . . . . . . . . . Neon indicator lamp circuits for each pin of the test socket Test Socket . . . . . . . . . . . . . . . . Zero-force insertion and removal type Jacks. . . . . . . . . . . . . . . . . . . An individual banana jack, connected to each pin of the test socket, permits direct patch-in and patch-out to other test equipment Stepping Signal . . . . . . . . . . . . . . 2.5 volts DC or 1.8 volts DC, pushbutton mercury switch (zero bounce) operated Supply Voltage. . . . . . . . . . . . . . . 5 VDC or 3.6 VDC, 300 mA, regulated, +/- 5% Input Voltage . . . . . . . . . . . . . . . 100-135/210-270 VAC, 50/60 Hz, switch selected Power Requirements. . . . . . . . . . . . . 10 watts Dimensions. . . . . . . . . . . . . . . . . 11-3/8” wide X 9-1/4” deep X 4-5/8” high Weight. . . . . . . . . . . . . . . . . . . 4.5 lbs