NCV1455BDR2G

Overview

The NCV1455BDR2G is a monolithic timing circuit from onsemi, functioning as a highly stable controller for accurate time delays or oscillation. It operates within a supply voltage range of 4.5 V to 16 V and supports both astable and monostable modes. The device features an output structure capable of sourcing or sinking up to 200 mA, allowing it to drive TTL circuits directly. Timing precision is maintained with a temperature stability of 0.005% per °C. The part is housed in an SOIC-8 package and is designed for automotive applications with an operating temperature range of -40°C to +125°C.

Feature Summary

• Direct replacement for NE555 timers with extended temperature range (-40°C to +125°C)
• High current output capability: source or sink up to 200 mA
• Adjustable duty cycle in astable mode with precise frequency control
• Internal reset functionality via dedicated inhibit/reset pin

Applications

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

Procurement Notes

Verify the NCV prefix indicates automotive qualification and site/change control requirements. Confirm the DR2 suffix corresponds to the SOIC-8 tape and reel packaging containing 2500 units. Ensure the G suffix denotes a lead-free package compliant with RoHS standards before finalizing procurement specifications.

Selection Notes

Select this component when an NE555 equivalent is needed but with an extended industrial or automotive temperature range. The NCV1455B supports operation up to +125°C ambient, whereas standard variants are limited to +70°C or +85°C. Use this part for designs requiring high current drive capabilities up to 200 mA without external buffering.

Part Context

The NCV1455B belongs to the MC1455 family of monolithic timers. The NCV prefix specifically designates parts intended for automotive and other applications requiring strict site and change control protocols. This distinguishes it from the commercial MC1455 and industrial MC1455B variants, which have narrower operating temperature ranges.

Replacement Considerations

The datasheet explicitly lists the NE555 timer as a direct replacement target. Other compatible parts include the MC1455 and MC1455B, though these offer lower maximum operating temperatures compared to the NCV1455B's -40°C to +125°C range.