MC1455BP1

Programmable Timers And Oscillators Overview

The MC1455BP1 is a monolithic timing circuit manufactured by onsemi, housed in an 8-pin PDIP package. It functions as a highly stable controller for generating accurate time delays or oscillation, serving as a direct replacement for NE555 timers. The device operates within a supply voltage range of 4.5 V to 16 V and supports both astable and monostable modes. Key electrical characteristics include a high current output capable of sourcing or sinking up to 200 mA, allowing it to drive TTL circuits directly. The timing accuracy is specified with an initial error of 1.0% and temperature drift of 50 PPM/°C.

Programmable Timers And Oscillators Feature Summary

• Direct replacement for NE555 timers with compatible pinout and functionality
• High current output stage capable of sourcing or sinking 200 mA
• Operates in both astable (oscillator) and monostable (one-shot) modes
• Timing stability of 0.005% per °C with adjustable duty cycle in astable mode

Programmable Timers And Oscillators Applications

• Solid state time delay relays
• Pulse width modulation circuits
• Missing pulse detectors
• Sequential timing sequences

Programmable Timers And Oscillators Procurement Notes

Verify the specific suffix BP1 corresponds to the PDIP-8 package and standard commercial temperature range (0°C to +70°C). Confirm RoHS compliance status, as non-green variants may exist. Check for automotive-grade alternatives like NCV1455B if extended temperature ranges (-40°C to +125°C) are required for the application environment.

Programmable Timers And Oscillators Selection Notes

Select this component when a CMOS-compatible 555 timer with higher current drive capability is needed compared to standard bipolar versions. Ensure external resistor values limit Pin 7 discharge current below 200 mA. For applications requiring wider temperature tolerance, consider the MC1455B or NCV1455B variants instead of the standard MC1455.

Programmable Timers And Oscillators Part Context

The MC1455 belongs to the MC1455/MC1455B family of monolithic timing circuits from onsemi. The MC1455 represents the standard commercial grade version, while the MC1455B offers an extended industrial temperature range. The NCV prefix denotes automotive-grade parts with stricter change control requirements. All share the same internal architecture and pin configuration.

Programmable Timers And Oscillators Replacement Considerations

Texas Instruments SA555P is listed as a direct replacement.