ICL7129 Analog Devices Inc./Maxim Integrated Data Acquisition parts available at DigiKey.
The Harris ICL7129 is a very high performance 41/2-digit analog-to-digital converter that directly drives a multiplexed liquid crystal display.
LCD Drivers Low-Noise, 4 1/2 Digit, Single-Chip ADC with Multiplexed LCD Drivers. Analog Devices / Maxim Integrated ICL7129ACQH+D +1 image.