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BUY MM5450YN https://www.utsource.net/itm/p/838064.html
IC, LED DISPLAY DRIVER 34 SEG ; Driver IC type:LED; Character type:34 segment; Pins, number of:40; Base number:5450; Case style:DIL; IC Generic number:5450; Logic function number:5450; Temp, op. max:85degree C; Temp, op.
The MM5450YN is a monolithic integrated circuit manufactured by Micrel. It is a programmable timer that can be used to generate accurate time delays or oscillations. The device is available in a 40-pin DIP package. Features: * Wide operating voltage range: 2.7V to 18V * Programmable time delay from 1ms to 10s * Programmable oscillator frequency from 0.1Hz to 10kHz * Low power consumption * TTL and CMOS compatible Applications: * Time delay generation * Pulse width modulation * Oscillator applications * Frequency divider * Motor speed control * Pulse generation (For reference only)