These ICs are commonly found as inverters and drivers in LSI calculators with vacuum fluorescent displays.
|Period:||Used from (approx.) 1972 to 1976.|
|Source of Data:||Data for these devices was derived from reverse engineering of a Ricomac 1216, Miida MC840, Olympia CD401A, Sharp ELSI 804, etc.|
|Technology:||Probably just a PNP bipolar transistor for each inverter with all the emitters tied to GND.|
|Supply Voltage:||No direct connection of the supply voltage to the IC is required. However they were used in environments where the logic supply was -15V.|
|Logic:||Logic levels are GND and -15V.|
Outputs are open-collector. The TM4312 may have internal pull-down resistors on the bases while the others do not, although this has not been confirmed.
|Packaging:||Standard 16-pin DIP.|
Vacuum Flourescent Drivers
Calculators | Integrated Circuits | Displays | Simulations