MC14521B Datasheet - ON Semiconductor

MC14521B 24-Stage Frequency Divider

MC14521B 24-Stage Frequency Divider The MC14521B consists of a chain of 24 flip flops with an input circuit that allows three modes of operation. The input will function as a crystal oscillator, an RC oscillator, or as an input buffer for an external oscillator. Each flip flop divides the frequency of the previous flip flop by two, consequently this part will count up to 224 = 16,777,216. The count advances on the negative going edge of the clock. The outputs of the las.

MC14521B Features

* All Stages are Resettable

* Reset Disables the RC Oscillator for Low Standby Power Drain

* RC and Crystal Oscillator Outputs Are Capable of Driving External Loads

* Test Mode to Reduce Test Time

* VDD′ and VSS′ Pins Brought Out on Crystal Oscillator Inverter

MC14521B_ONSemiconductor.pdf