LTC6994HDCB-1#TRMPBF

Overview

The LTC6994HDCB-1#TRMPBF is a programmable delay block 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 idle supply current of 70µA at a 10µs delay setting. The device provides a delay range from 1µs to 33.6 seconds, programmed via an external resistor (RSET) and a digital divider code (NDIV). The LTC6994-1 variant delays either the rising or falling edge based on configuration. It features a CMOS output driver capable of sourcing and sinking 20mA, with a specified operating temperature range of –40°C to 125°C.

Feature Summary

• Configurable delay functionality allowing selection between delaying rising edges or falling edges via the DIV pin logic state.
• Programmable time base established by a single external resistor connected to the SET pin, regulating internal oscillator frequency.
• Internal digital filter acts as a noise discriminator, ignoring input transitions shorter than the programmed delay duration.
• Dynamic adjustment capability for delay time through control voltage inputs on the DIV pin.

Applications

• Noise discriminators and pulse qualifiers for signal conditioning
• Switch debouncing in mechanical interface circuits
• Delay matching between parallel signal paths
• Timing elements in high vibration or high acceleration environments

Procurement Notes

Verify the specific suffix #TRMPBF indicates tape and reel mini packaging when ordering. Confirm the HDCB designation corresponds to the 6-lead DFN package variant. Ensure the 'H' grade matches the required –40°C to 125°C industrial temperature range for the target application environment.

Selection Notes

Select the LTC6994-1 version if only one transition edge requires delay. Use the LTC6994-2 variant if both rising and falling edges must be delayed or if output inversion is needed. Choose the HDCB package for surface mount applications requiring a low-profile footprint. Verify RSET values fall within the 50kΩ to 800kΩ range for optimal accuracy.

Part Context

This component belongs to the Analog Devices TimerBlox family of silicon timing devices. It shares architectural similarities with the LTC6993 monostable generator and LTC6995 long timer oscillators. The HDCB-1 suffix specifically identifies the industrial grade, non-inverting delay block variant within the broader LTC6994 product line.

Replacement Considerations

The LTC6994HDCB-2#TRMPBF serves as a direct functional substitute if dual-edge delay or output inversion is required. Other TimerBlox devices like the LTC6993 or LTC6995 offer different timing topologies but share similar programming interfaces and package options.