MC1455BDR2G

Programmable Timers And Oscillators Overview

The MC1455BDR2G is a monolithic timing circuit from onsemi, packaged in an SOIC-8 surface-mount format. It operates within a supply voltage range of 4.5 V to 16 V and supports ambient temperatures from -40°C to +85°C. The device features high-current outputs capable of sourcing or sinking up to 200 mA, allowing direct drive of TTL loads. It functions as a stable controller for precise time delays or oscillation, serving as a direct replacement for NE555 timers.

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 stability of 0.005% per °C across operating temperature
• Supports both astable and monostable operation modes

Programmable Timers And Oscillators Applications

• Solid state time delay relay circuits
• Linear voltage ramp generation using constant current sources
• Missing pulse detection systems
• Pulse width modulation via control voltage input

Programmable Timers And Oscillators Procurement Notes

Verify the 'G' suffix indicates a lead-free package compliant with RoHS standards. Confirm the 'D' suffix corresponds to the SOIC-8 case 751 outline. Ensure the B grade matches the required -40°C to +85°C operating range rather than the standard 0°C to +70°C variant.

Programmable Timers And Oscillators Selection Notes

Select this component when a CMOS-compatible timer requires higher output drive capability than standard bipolar versions. The internal comparators maintain fixed ratios relative to VCC, ensuring timing independence from supply voltage fluctuations. External timing is controlled by one resistor and capacitor for monostable mode, or two resistors and one capacitor for astable mode.

Programmable Timers And Oscillators Part Context

This part belongs to the MC1455 family, which includes variants like MC1455 (standard) and NCV1455B (automotive). The MC1455B specifically extends the operating temperature range to -40°C. The DR2G suffix denotes tape and reel packaging containing 2500 units.

Programmable Timers And Oscillators Replacement Considerations

MC1455BDR2G serves as a direct functional replacement for the NE555 timer series.