BUY UM9204 https://www.utsource.net/itm/p/5368955.html
DTMF Receiver
The UMC UM9204 is a 14-pin DIP (dual in-line package) integrated circuit (IC) that provides a low-power, low-voltage, low-cost solution for the generation of a wide range of clock frequencies. It is a programmable clock generator that can generate frequencies from 0.5 Hz to 20 MHz. Description: The UMC UM9204 is a low-power, low-voltage, low-cost programmable clock generator that can generate frequencies from 0.5 Hz to 20 MHz. It has a wide range of operating voltages from 1.8V to 5.5V and is suitable for a variety of applications. Features: Low-power, low-voltage, low-cost solution for the generation of a wide range of clock frequencies Wide range of operating voltages from 1.8V to 5.5V Programmable clock generator Generates frequencies from 0.5 Hz to 20 MHz 14-pin DIP package Applications: The UMC UM9204 is suitable for a variety of applications, such as: Automotive Industrial Medical Consumer Telecommunications Networking (For reference only)