74ACT161MTR

Counter Dividers Overview

The 74ACT161MTR is a synchronous presettable 4-bit binary counter manufactured by STMicroelectronics using sub-micron silicon gate C2MOS technology. It operates within a supply voltage range of 4.5V to 5.5V and features an asynchronous clear function. The device supports a maximum clock frequency of 290MHz at 5V with typical propagation delays of 5.5ns. It provides symmetrical output impedance with drive capabilities of 24mA minimum for both high and low states, ensuring compatibility with TTL outputs and 50Ω transmission lines.

Counter Dividers Feature Summary

• Synchronous presettable 4-bit binary counting architecture with asynchronous master reset capability
• High-speed CMOS performance utilizing advanced sub-micron silicon gate technology
• Direct interface compatibility with TTL, NMOS, and High-Speed CMOS systems
• Integrated protection circuits against static discharge and transient excess voltage

Counter Dividers Applications

• High-speed digital counters in industrial control systems
• Timing and sequencing logic in telecommunications equipment
• Data processing units requiring parallel load and count-up operations
• Cascaded multi-stage counting applications utilizing terminal count outputs

Counter Dividers Procurement Notes

Verify the specific package type required, as the MTR suffix indicates tape and reel packaging for surface-mount assembly. Confirm that the design accommodates the specified operating temperature range and supply voltage tolerances. Ensure input signal rise and fall times comply with the recommended limits to maintain timing accuracy. Check for any end-of-life status updates from the manufacturer before finalizing procurement plans.

Counter Dividers Selection Notes

Select this component when a high-speed, low-power synchronous counter is needed for 5V logic environments. It is suitable for designs requiring direct interfacing with legacy TTL or modern CMOS interfaces without additional level shifting. Consider the SO-16 or TSSOP-16 packages based on board space constraints and thermal requirements. Verify that the 24mA output drive current meets the load requirements of the downstream circuitry.

Counter Dividers Part Context

This device belongs to the 74ACT series of advanced CMOS logic components, designed to bridge the performance gap between standard TTL and older CMOS families. It offers speed comparable to AC/ACT families while maintaining lower power consumption. The 74ACT161 specifically implements the standard 4-bit binary counter functionality found in the 74161 family but with enhanced switching characteristics and improved latch-up immunity.

Counter Dividers Replacement Considerations

Compatible replacements include other 74ACT161 variants from different manufacturers that adhere to the same pinout and functional specifications. Ensure that any substitute part maintains the 4.5V to 5.5V operating voltage range and similar propagation delay characteristics. Verify that the replacement package matches the physical footprint if surface-mount assembly is required.