LTC6994HDCB-2#TRMPBF

Overview

The LTC6994HDCB-2#TRMPBF is a programmable delay block and debouncer from the TimerBlox family, housed in a 6-lead (2mm x 3mm) plastic DFN package. It operates on a single supply voltage ranging from 2.25V to 5.5V with a typical supply current of 70µA at a 10µs delay setting. The device provides a delay range from 1µs to 33.6 seconds, determined by an internal master oscillator frequency set by RSET and a programmable clock divider N_DIV. The -2 suffix indicates functionality that delays both rising and falling transitions, with an optional output inversion capability controlled by the POL bit.

Feature Summary

• Configurable delay block capable of delaying one or both input signal transitions
• Dynamic adjustment of delay time via external control voltage or resistor programming
• Integrated noise discrimination and pulse qualification logic for signal filtering
• CMOS output driver with high current sourcing and sinking capabilities

Applications

• Noise discriminators and pulse qualifiers in noisy environments
• Switch debouncing for mechanical contact inputs
• Delay matching between multiple signal paths
• Timing elements for portable and battery-powered equipment

Procurement Notes

Verify the specific temperature grade and package marking code against the official Analog Devices order information table. Confirm that the #TRMPBF suffix corresponds to the mini tape and reel packaging format required for your assembly process. Ensure the component meets the specified operating temperature range for your application environment.

Selection Notes

Select the LTC6994-2 variant when both rising and falling edges require identical delay or when output inversion is necessary. Choose the H-grade version for applications requiring operation up to 125°C. Use the TimerBlox design tool to calculate precise resistor values for the SET and DIV pins to achieve target delay times within specified accuracy limits.

Part Context

This component belongs to the LTC6994 series of silicon timing devices, which also includes the LTC6994-1 variant that delays only a single edge transition. The series offers various package options including TSOT-23 and DFN, with different temperature grades such as C, I, H, and MP to suit diverse industrial and automotive requirements.

Replacement Considerations

LTC6994HDCB-1#TRMPBF serves as a functional substitute if only single-edge delay is required. For broader temperature ranges, consider the LTC6994MPS6-2#TRMPBF in the TSOT-23 package. Verify pin compatibility and electrical characteristics before substituting any other TimerBlox family members.