CD4045 IC 21-STAGE COUNTER DIP-16 CD4045

Product Overview

The CD4045B is a specialized CMOS timing circuit that features 21 counter stages. It is designed for applications requiring high-precision frequency division, such as crystal oscillators. The device includes two output-shaping flip-flops, two inverter output drivers, and input inverters. The internal configuration provides 21 flip-flop stages, plus two additional flip-flops to shape the output waveform into a 3.125% duty cycle.

Core Specifications

• Manufacturer: Texas Instruments (originally Harris Semiconductor)

• Function: 21-Stage Counter/Timing Circuit

• Output Characteristics: Two inverter output drivers with push-pull operation.

• Duty Cycle: Shaping flip-flops produce a 3.125% output duty cycle.

• Oscillator Support: Includes an inverter designed for use as a crystal oscillator/amplifier, with external terminal access to the p and n transistor sources for improved supply-voltage sensitivity.

• Voltage Rating: High-voltage types (up to 20 V).