74F190PC

Overview

The onsemi 74F190PC is a synchronous up/down BCD decade counter housed in a 16-lead Plastic Dual-In-Line Package (PDIP). It features asynchronous parallel loading and supports count frequencies up to 125 MHz. The device operates within a supply voltage range of 4.5V to 5.5V and an ambient temperature range of 0°C to +70°C. Key electrical characteristics include a maximum clock frequency of 125 MHz at 25°C, propagation delays ranging from 3.0 ns to 13.5 ns depending on the transition and temperature, and standard TTL-compatible input/output levels.

Feature Summary

• Synchronous counting capability with direction control via Up/Down input
• Asynchronous parallel load for immediate presetting of counter values
• Terminal Count output indicating zero or nine states
• Ripple Clock output for simplified multi-stage counter cascading

Applications

• Programmable frequency dividers
• Multi-stage digital counters
• BCD sequence generation
• Timing control circuits

Procurement Notes

Verify component authenticity through authorized distributors. Confirm package integrity upon receipt. Check datasheet revisions for updated electrical specifications. Ensure storage conditions comply with moisture sensitivity level requirements. Validate pin compatibility before integration into existing PCB layouts.

Selection Notes

Select this component for applications requiring precise BCD counting with programmable start values. Consider the synchronous nature for timing-critical designs. Evaluate the ripple clock feature if cascading multiple units. Verify power supply stability within the specified voltage range to ensure reliable operation across the operating temperature spectrum.

Part Context

This device belongs to the 74F series of high-speed logic components. It implements a reversible decade counter function using four edge-triggered flip-flops. The PDIP package provides through-hole mounting options suitable for prototyping and industrial applications requiring robust physical connections.

Replacement Considerations

SN74F30N is listed as a parameter equivalent alternative by Texas Instruments.