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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. |
Notes: |
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Vacuum Flourescent Drivers
Calculators | Integrated Circuits | Displays | Simulations EEC |
2000 Aug |