BUY LC7570 https://www.utsource.net/itm/p/651315.html
Static Driver for Vacuum Fluorescent Display for Frequency Display Applications
Description: The LC7570 is a CMOS integrated circuit designed for use in electronic musical instruments. Features: Low power consumption High-speed operation Low noise High-accuracy oscillator Built-in timer Built-in multiplexer Built-in A/D converter Built-in D/A converter Built-in ROM Applications: Electronic musical instruments Electronic keyboards Synthesizers Digital signal processing Digital audio effects Digital audio mixing Digital audio recording (For reference only)