Description:

Lot of 6 RS-232 quad line receivers in 14-pin DIP packages, mixed brands (Motorola/ON MC1489, TI SN75189, ST, etc.). These classic MC1489/SN75189-compatible devices provide four independent RS-232 receiver channels with TTL/DTL-compatible outputs, intended for interfacing serial ports to 5 V logic. Parts are new old stock (NOS) from surplus trays; bodies may show light cosmetic marks from long storage, but leads are full length and never soldered. Sold as untested vintage components.

Modern uses:

- Adding or repairing RS-232 receive channels on vintage computers, terminals and industrial control equipment

- Building level-shifting front ends for UARTs, microcontrollers and SBCs that need true ±12 V RS-232 compatibility

- Replacing failed MC1489/SN75189/75189-class receivers on classic modem, CNC, telecom or test-equipment boards

- Stocking parts drawers for general-purpose RS-232-to-TTL receiver stages in lab projects

Compatibility note:

These are MC1489 / SN75189-class quad RS-232 line receivers in 14-pin DIP packages with 5 V TTL outputs. They are intended for use with standard ±12 V RS-232 signal levels and a single +5 V logic supply, and are generally pin- and function-compatible across MC1489, SN75189 and similar 1489-type parts. Always confirm the pinout, supply voltage (4.5–5.5 V), input voltage range and package style against the original IC and datasheet before substitution, especially in safety-critical or high-reliability equipment.