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BUY MM74C923N https://www.utsource.net/itm/p/223832.html
20-Key Encoder; Package: DIP; No of Pins: 20; Container: Rail
Description: The MM74C923N is an electronic device from Texas Instruments which contains a 4-digit counter with decoder and display drivers and an oscillator section. It is a bipolar integrated circuit with a DIP-20 (Dual Inline Package) body and is available in both the surface mount and through-hole versions. Features: Suitable for high-speed counting and time-delay applications. Counts up to 4 digits using the 1-of-10 BCD code. Input low level shift register to control the display. Easy operation due to the built-in oscillator and divider networks. Internal reset circuit to reset all internal registers. High noise immunity in the input/output circuits. Maximum supply voltage of 18 V. Low power consumption. Applications: Frequency dividers. Time delay applications. Interface clock generator. Pulse width modulation. Frequency to voltage and voltage to frequency conversion. Digital control systems. (For reference only)