74F269SPC

Overview

The onsemi 74F269SPC is an 8-bit bidirectional binary counter housed in a 24-lead Plastic Dual-In-Line Package (PDIP). It operates within a supply voltage range of +4.5V to +5.5V and supports a maximum count frequency of 100MHz. The device features synchronous counting and loading, with all state changes initiated by the rising edge of the clock signal. It includes parallel data inputs for programmable preset capability and built-in lookahead carry for easy cascading.

Feature Summary

• Synchronous counting and loading mechanism where all state changes are initiated by the rising edge of the clock.
• Built-in lookahead carry capability designed to facilitate easy cascading of multiple units.
• Programmable operation enabled through parallel preset capability and Up/Down control input.

Applications

• High-speed digital counting applications requiring bidirectional functionality
• Cascaded counter systems utilizing built-in lookahead carry
• Programmable timing circuits using parallel load capabilities

Procurement Notes

Verify the specific package variant, as the datasheet indicates availability in both SOIC and PDIP formats. Confirm that the ordering suffix matches the required physical footprint. Ensure compatibility with standard 5V logic levels and verify that the operating temperature range meets the application's environmental requirements before finalizing procurement.

Selection Notes

Select this component when an 8-bit synchronous bidirectional counter is required with high-speed performance up to 100MHz. It is suitable for designs needing parallel loading and lookahead carry features. Ensure the system operates within the recommended +4.5V to +5.5V supply voltage range and adheres to the specified DC electrical characteristics for reliable operation.

Part Context

This component belongs to the 74F series of logic devices, known for high-speed performance. The 74F269 specifically provides 8-bit bidirectional counting capabilities. It is manufactured under the Fairchild Semiconductor brand, which is now part of onsemi. The device utilizes standard TTL-compatible logic levels and interfaces.

Replacement Considerations

Check for equivalent 8-bit bidirectional counters in the 74F series from other manufacturers. Verify pinout compatibility and electrical specifications such as propagation delay and supply current. Consider alternative packages if the PDIP form factor is unavailable, ensuring the SOIC variant meets spatial constraints.