onsemi Logic - Logic - Counters, Dividers - MC14521BDR2 MC14521BDR2

The MC14521BDR2 is a 24-stage frequency divider that operates by dividing the frequency of the input signal by two through a series of flip-flops. It supports three modes of operation: as a crystal oscillator, an RC oscillator, or as an input buffer for an external oscillator. The device can count up to 16,777,216 and advances the count on the negative edge of the clock signal. Key features include resettable stages, low standby power drain when the RC oscillator is disabled, and the ability to drive external loads from both RC and crystal oscillator outputs. It has a supply voltage range of 3.0 Vdc to 18 Vdc and can drive two low-power TTL loads or one low-power Schottky TTL load. The device is AEC-Q100 qualified, making it suitable for automotive applications, and is also Pb-free and RoHS compliant. The MC14521BDR2 is packaged in a SOIC-16 format, with 2500 units available per tape and reel for efficient handling. Its operational temperature range spans from -55¬8C to +125¬8C, ensuring reliability in various environments.