SN54LS191J

Counter Dividers Overview

The SN54LS191J is a military-grade, synchronous up/down binary counter manufactured by Texas Instruments. It features four-bit binary counting capability with a dedicated up/down control input to determine count direction. The device utilizes positive-edge triggering for all flip-flops and includes a synchronous parallel load function. Designed for high-reliability applications, it operates within the standard LS-TTL logic family specifications.

Counter Dividers Feature Summary

• Synchronous up/down binary counting with independent direction control
• Positive-edge triggered flip-flops for precise timing synchronization
• Synchronous parallel load capability for direct data entry
• Military-grade construction suitable for extreme environmental conditions

Counter Dividers Applications

• Aerospace navigation systems requiring radiation-hardened or high-reliability components
• Military communication equipment operating in harsh environments
• Defense electronics demanding extended temperature range stability
• High-reliability industrial control systems with strict qualification standards

Counter Dividers Procurement Notes

Verify that the component is sourced from authorized distributors to ensure authenticity. Confirm the presence of the J suffix indicating ceramic DIP packaging and military grade. Check for proper handling procedures due to potential ESD sensitivity. Validate datasheet revisions match the manufacturing date code. Ensure compliance with relevant defense procurement standards.

Counter Dividers Selection Notes

Select this component when military-grade reliability and wide temperature operation are required. Compare against commercial variants if cost reduction is prioritized over environmental resilience. Consider package availability as ceramic DIP options may have longer lead times. Evaluate power consumption requirements against other LS-TTL alternatives.

Counter Dividers Part Context

This part belongs to the SN54 series, which denotes military-grade performance compared to the commercial SN74 series. It is part of the broader 74LS191 family of synchronous counters. The J suffix specifically identifies the ceramic dual-in-line package variant designed for durability in demanding operational scenarios.

Counter Dividers Replacement Considerations

SN54LS191FK is a verified substitute offering identical functionality in a flatpack package. SN54LS191F3 provides equivalent performance in a different ceramic configuration. Verify pin compatibility and mounting requirements before substitution.