Description:

Lot of 10x μA709TC operational amplifier ICs in 8-pin DIP packages, original Fairchild parts marked “μA709TC 8621 KOREA”. These are vintage new old stock op amps from the classic 709 family, ideal for restoring older test gear, audio equipment, and analog control circuits that were designed around the original 709 characteristics. Parts are unused and stored on anti-static foam; leads are bright and straight, with only light cosmetic marks from storage and handling.

Features & Specifications:

- Quantity per lot: 10x μA709TC ICs

- Manufacturer: Fairchild (marked KOREA date code 8621)

- Function: General-purpose bipolar op amp (μA709 family)

- Package: 8-pin DIP, through-hole

- Supply: split ± rails (typ. ±15 V) or other bipolar supplies per datasheet

- Type: Vintage bipolar op amp, compensation required as in original designs

- Condition: New old stock (NOS), untested surplus

- Stored dry on anti-static foam, pulled from surplus trays

Modern uses:

- Repair of vintage test instruments and industrial control boards

- Restoration of classic audio and synthesizer equipment designed for the 709

- Experiments comparing early op amp behavior to modern devices

- Educational analog electronics projects using real vintage silicon

Compatibility note:

These μA709TC op amps are original-style bipolar 709 devices in 8-pin DIP and generally require external compensation components, power-supply decoupling and appropriate ± supply rails. For drop-in use, confirm that the original circuit was designed for μA709/LM709 type parts, check the pinout against the datasheet, and verify the supply voltages and compensation network. As with all NOS vintage parts, test in your target circuit before using them in critical or production designs.