DM74S163N

Counter Dividers Overview

The DM74S163N is a synchronous, presettable 4-bit binary counter manufactured by Fairchild Semiconductor. It features an internal carry look-ahead for high-speed counting applications and utilizes diode-clamped inputs to suppress line ringing. The device operates with a buffered clock input that triggers flip-flops on the rising edge, ensuring simultaneous output changes. It includes a decoded carry output via a NOR gate to prevent spikes during normal operation. The component is housed in a 16-lead plastic dual-in-line package (PDIP) and supports synchronous counting with dedicated load control.

Counter Dividers Feature Summary

• Synchronous operation eliminates output counting spikes associated with asynchronous counters
• Internal carry look-ahead enables fast counting designs
• Diode-clamped inputs suppress line ringing and simplify system design

Counter Dividers Applications

• High-speed counting designs
• Memory decoding systems
• Data transmission systems

Counter Dividers Procurement Notes

Verify the specific ordering code suffix against the manufacturer's current documentation to confirm package type and environmental compliance. Ensure the procurement source provides the original datasheet from Fairchild or its successor entity to validate technical specifications. Confirm RoHS status and moisture sensitivity levels prior to integration into production assemblies.

Counter Dividers Selection Notes

Select this component when synchronous presettable counting is required with minimal propagation delay. The internal carry look-ahead makes it suitable for cascading multiple stages without external logic delays. Verify that the operating voltage range and temperature specifications align with the target system environment before finalizing the design choice.

Counter Dividers Part Context

This part belongs to the 74S series of Schottky TTL logic devices, known for high-speed performance. It functions as a 4-bit binary counter with synchronous preset capability. The N suffix typically denotes a plastic dual-in-line package variant. It serves as a fundamental building block for digital timing and sequencing circuits within larger microprocessor or memory systems.

Counter Dividers Replacement Considerations

Compatible substitutes include other synchronous 4-bit binary counters with preset capabilities such as the DM74LS163 or DM74HC163, depending on speed and power requirements. Verify pin compatibility and logic level thresholds when replacing Schottky TTL parts with LS or HC family equivalents.