74ACT163PC

Counter Dividers Overview

The Fairchild Semiconductor 74ACT163PC is a high-speed synchronous modulo-16 binary counter belonging to the 74ACT logic series. It features a 4-bit up-counting architecture with synchronous presettable loading capabilities, allowing data input to be loaded on the rising edge of the clock without affecting the current count state until the next cycle. The device includes two Count Enable inputs (CTP and CTE) and a Terminal Count output to facilitate synchronous expansion in multistage configurations. It operates within a supply voltage range of 4.5 V to 5.5 V and supports TTL-compatible inputs. The component is housed in a 16-pin DIP package and provides outputs capable of sourcing and sinking 24 mA.

Counter Dividers Feature Summary

• Synchronous presettable binary counting with parallel load capability
• TTL-compatible inputs for direct interfacing with standard logic families
• High-drive outputs supporting 24 mA source and sink currents
• Dedicated terminal count output for cascading multiple stages

Counter Dividers Applications

• Programmable frequency dividers
• Synchronous multistage counter systems
• Digital timing and sequencing circuits
• Event counting applications requiring precise synchronization

Counter Dividers Procurement Notes

Verify the specific manufacturer origin, as Fairchild Semiconductor's logic division was acquired by onsemi. Confirm that the 'PC' suffix denotes the PDIP-16 through-hole package variant. Ensure the component meets RoHS compliance requirements if applicable to your assembly process. Check for obsolescence status or lifecycle notices, as older logic families may have limited production runs or require alternative sourcing strategies.

Counter Dividers Selection Notes

Select this component when a synchronous 4-bit binary counter with parallel load functionality is required in a through-hole design. It is suitable for applications needing TTL-compatible input levels and moderate drive strength. Consider the 74AC163PC if lower power consumption is prioritized over speed, or the 74HC163PC for broader voltage compatibility. Ensure the PCB layout accommodates the 16-pin DIP footprint and that the operating temperature range aligns with system constraints.

Counter Dividers Part Context

The 74ACT163PC is part of the widely adopted 74ACT family, which bridges the performance gap between legacy 74LS logic and modern CMOS technologies. This family offers reduced propagation delay while maintaining compatibility with TTL input standards. The 74ACT163 specifically addresses the need for high-speed synchronous counting in industrial and consumer electronics, providing reliable operation in environments where precise timing and robust noise immunity are critical.

Counter Dividers Replacement Considerations

Direct pin-compatible substitutes include the MC74ACT163PC from onsemi, reflecting the corporate acquisition. Other functional equivalents such as the SN74ACT163N from Texas Instruments or the HCT74163 variants may be considered, though input/output electrical characteristics should be verified against the original datasheet specifications.