RTL & DTL

FAIRCHILD - 923EC - UA923 - IC, RTL. Single JK Flip-flop. Package: TO-99-8 Molded Package, Gold Leads, Green Test Dots.

Historical Background: Beginning in 1961, Fairchild offered one of the first Integrated Circuit product lines for commercial sale. These ICs were silicon and contained a few transistors, diodes, resistors and even capacitors on the silicon “chip”. These ICs implemented basic logic functions and used a type of circuitry known as RTL (Resistor Transistor Logic). The 923 is an RTL IC containing 15 transistors which performs the logic function defined as J-K Flip-Flop. Your units are from 1972 and are type 923EC, indicating commercial temperature range and epoxy case.

Status: Discontinued

RTL - Resistor Transistor Logic

Historic GLOB TOP (Black Epoxy) over the Integrated Circuit.

Genuine Vintage Fairchild - Rare - New Old Stock

Applications: Used in 1960s and 1970 computer circuitry.

NSN 5962-00-436-1758

Motorola - MC789P - IC. Hex Inverter.

Terminal Pitch: 2.54 mm

Case: 14 Dip, Gold Leads.

Genuine Motorola - New Old Stock.