SN74AS869NT

Counter Dividers Overview

The SN74AS869NT is a synchronous 8-bit up/down binary counter manufactured by Texas Instruments. It features internal-carry look-ahead circuitry for high-speed cascading and fully programmable preset capabilities. The device operates with a supply voltage range of 4.5 V to 5.5 V and supports clock frequencies up to 45 MHz. It utilizes positive-edge triggered flip-flops and includes count-enable inputs (ENP, ENT) and a ripple-carry output (RCO). The component is housed in a standard plastic 24-pin DIP package.

Counter Dividers Feature Summary

• Synchronous operation eliminates output counting spikes associated with asynchronous counters
• Internal carry look-ahead circuitry simplifies n-bit cascading without additional gating
• Fully programmable parallel loading allows presetting to any value between 0 and 255
• Direction control via S0 and S1 inputs enables independent up or down counting

Counter Dividers Applications

• High-speed binary counting applications requiring synchronous operation
• Cascaded multi-stage digital counting systems utilizing internal carry look-ahead
• Programmable event counters with presettable initial values
• Digital timing circuits requiring precise up/down direction control

Counter Dividers Procurement Notes

Verify the specific ordering suffix matches the required package type and temperature rating. Confirm RoHS compliance status and lead finish specifications against current production data sheets. Ensure the procurement channel sources from authorized distributors to guarantee authenticity. Check for any product change notices affecting pinout or electrical characteristics prior to final design integration.

Counter Dividers Selection Notes

Select this component when synchronous 8-bit counting with internal carry lookahead is required. The AS series offers higher speed performance compared to ALS variants. Verify that the operating temperature range meets system requirements. Consider the 24-pin DIP package constraints for PCB layout. Ensure power supply stability within the specified voltage limits for reliable operation.

Counter Dividers Part Context

This part belongs to the Texas Instruments SN74AS family of high-speed logic devices. It is functionally related to the SN74ALS869 but offers faster switching characteristics. The datasheet covers multiple variants including SN54AS869 and SN74AS867. The NT suffix denotes the standard plastic dual-in-line package configuration used for through-hole mounting.

Counter Dividers Replacement Considerations

SN74AS869DW serves as a direct surface-mount replacement offering identical functionality in an SOIC package. SN74ALS869 provides a slower alternative with similar logical operations. SN54AS869 is available for military-grade temperature range requirements. Verify pin compatibility and electrical specifications before substituting.