MC1455P1

Programmable Timers And Oscillators Overview

The MC1455P1 is a monolithic timing circuit manufactured by onsemi, designed as a direct replacement for NE555 timers. It operates within a supply voltage range of 4.5 V to 16 V and supports both astable and monostable modes. The device features a high-current output capable of sourcing or sinking up to 200 mA, allowing it to drive TTL circuits directly. Timing accuracy is maintained with a temperature stability of 0.005% per °C. The component is housed in an 8-pin PDIP package (Case 626) and functions over an ambient operating temperature range of 0°C to +70°C.

Programmable Timers And Oscillators Feature Summary

• Direct replacement for NE555 timers with adjustable duty cycle
• High current output structure sources or sinks 200 mA
• Timing range from microseconds through hours using external RC networks
• Temperature stability of 0.005% per °C

Programmable Timers And Oscillators Applications

• Solid state time delay relays
• Linear voltage ramp generation
• Missing pulse detection
• Sequential timer circuits

Programmable Timers And Oscillators Procurement Notes

Verify the specific suffix P1 indicates the standard PDIP-8 package configuration. Confirm that the MC1455 variant meets the required 0°C to +70°C operating temperature range, distinct from the MC1455B (-40°C to +85°C) or NCV1455B (-40°C to +125°C). Ensure compatibility with existing PCB footprints for Case 626 outlines.

Programmable Timers And Oscillators Selection Notes

Select the MC1455P1 when a direct pin-compatible substitute for NE555 devices is needed in commercial temperature environments. Consider the 200 mA output capability for driving loads without additional buffering. Verify that the 4.5 V to 16 V supply range aligns with system power constraints. For automotive or extended temperature requirements, evaluate the NCV1455B or MC1455B alternatives instead.

Programmable Timers And Oscillators Part Context

The MC1455 series includes variants such as MC1455BP1 and MC1455DG. The MC1455P1 specifically denotes the plastic DIP-8 package version intended for general-purpose timing applications. It shares internal architecture with the MC1455B but differs in specified operating temperature limits and potential manufacturing site controls.

Programmable Timers And Oscillators Replacement Considerations

The datasheet identifies the NE555 as the primary comparable device for direct replacement purposes.