CD74AC191E

Counter Dividers Overview

The CD74AC191E is a high-speed CMOS logic presettable synchronous 4-bit binary up/down counter manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and supports bidirectional counting with positive-edge triggering. The device features an asynchronous reset and includes a ripple clock output (RCO) for cascading applications. It is housed in a 16-pin plastic dual-in-line package (PDIP) and is rated for operation across a temperature range of -55°C to 125°C.

Counter Dividers Feature Summary

• High-speed CMOS technology enables fast synchronous counting operations.
• Presettable architecture allows loading of specific binary values asynchronously.
• Bidirectional capability supports both up-counting and down-counting modes.
• Ripple clock output facilitates easy expansion into multi-stage counters.

Counter Dividers Applications

• Digital timing and sequencing circuits
• Frequency division networks
• Cascaded counter systems requiring precise synchronization

Counter Dividers Procurement Notes

Verify the manufacturer part number CD74AC191E against official Texas Instruments documentation to confirm specifications. Ensure the selected component matches the required 16-PDIP package and extended industrial temperature rating. Cross-reference datasheet revisions to validate electrical characteristics before integration.

Counter Dividers Selection Notes

Select this component when high-speed synchronous counting is required in harsh thermal environments. The AC series offers superior speed compared to standard HC logic while maintaining CMOS power efficiency. Verify that the system voltage remains within the 2 V to 6 V operational window to ensure reliable performance.

Counter Dividers Part Context

This device belongs to the Texas Instruments 74AC logic family, designed for high-performance digital applications. It serves as a direct functional equivalent to other industry-standard 4-bit presettable counters but provides enhanced switching speeds suitable for demanding timing requirements.

Counter Dividers Replacement Considerations

Check for compatible alternatives such as the SN74AC191 or CD74HC191 variants. Confirm pinout compatibility and electrical parameter alignment before substituting to maintain circuit integrity.