MC14521BCPG

Counter Dividers Overview

The MC14521BCPG is a 24-stage frequency divider and oscillator housed in a 16-pin PDIP package. It comprises a chain of flip-flops that count up to 2^24 (16,777,216) on negative clock edges. The input circuit supports crystal oscillators, RC oscillators, or external buffers. Outputs for stages 18 through 24 are accessible. Operating voltage ranges from 3.0 Vdc to 18 Vdc. It features asynchronous reset, test mode capabilities, and low standby power drain when the RC oscillator is disabled.

Counter Dividers Feature Summary

• Supports three input modes: crystal oscillator, RC oscillator, or external buffer
• Provides outputs for the last seven stages (Q18 through Q24)
• Includes a test function to reduce testing time by dividing the counter into parallel sections
• Features dedicated pins for connecting external resistors to enable low-power operation

Counter Dividers Applications

• Frequency division circuits
• Oscillator applications using external crystals
• RC-based timing generation
• Digital counting systems requiring high stage counts

Counter Dividers Procurement Notes

Verify the component matches the MC14521BCPG designation with the 'G' suffix indicating a lead-free and RoHS compliant package. Confirm the physical package type is PDIP-16 as specified in the ordering information. Ensure the device meets the required ambient temperature range of -55°C to +125°C for your specific application environment.

Counter Dividers Selection Notes

Select this component when a single-chip solution for high-ratio frequency division or stable oscillation is required. It is suitable for designs needing outputs from higher-order stages without cascading multiple counters. Consider the available test mode if manufacturing test coverage is a priority. Ensure the supply voltage remains within the 3.0 Vdc to 18 Vdc operational limits.

Counter Dividers Part Context

This device belongs to the MC14521B series of CMOS logic components manufactured by onsemi. It is part of the broader family of 4000-series compatible digital logic ICs designed for general-purpose counting and timing applications. The PDIP-16 variant offers through-hole mounting options for prototyping or specific board layouts.

Counter Dividers Replacement Considerations

Compatible substitutes include MC14521BDG (SOIC-16), MC14521BDR2G (SOIC-16 Tape & Reel), MC14521BFG (SOEIAJ-16), and MC14521BFELG (SOEIAJ-16). Cross-manufacturer equivalents such as CD4521B or HEF4521B may be considered if pin compatibility and electrical characteristics align.