LTC6994CDCB-1#TRPBF

Overview

The LTC6994CDCB-1#TRPBF is a programmable delay block from the TimerBlox family, housed in a 6-lead DFN package. It provides a delay range of 1µs to 33.6 seconds, configured via a single resistor (RSET) and an internal clock divider (NDIV). The device operates on a single supply voltage between 2.25V and 5.5V with a typical supply current of 70µA at a 10µs delay. It features a CMOS output driver capable of sourcing or sinking 20mA. The specified operating temperature range for this grade is 0°C to 70°C.

Feature Summary

• Configurable delay functionality allowing selection of rising or falling edge delays through the DIV pin logic setting.
• Noise discrimination capability that filters out input pulses shorter than the programmed delay duration.
• Dynamic adjustment support enabling real-time modification of delay time via external control voltages.

Applications

• Switch debouncing circuits
• Noise discriminators and pulse qualifiers
• Delay matching applications

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when ordering. Confirm the CDCB designation corresponds to the commercial temperature grade required for the target environment. Ensure the component matches the exact Analog Devices part number to guarantee electrical characteristics and package dimensions align with design specifications.

Selection Notes

Select the LTC6994-1 variant specifically when only one transition edge requires delaying. Use the RSET resistor value to set the master oscillator frequency and determine the base time unit. Configure the DIV pin voltage to select the appropriate integer divider ratio for the desired total delay span within the operational limits.

Part Context

This component belongs to the TimerBlox series of silicon timing devices manufactured by Analog Devices. It serves as a versatile solution for precise timing control without requiring external crystals or complex digital logic. The device integrates both the timing reference generation and the delay logic into a compact surface-mount package.

Replacement Considerations

LTC6994IDCB-1#TRPBF offers the same functionality with an extended industrial temperature range of -40°C to 85°C.

FAQ

How is the delay time programmed?

The delay is determined by the product of the internal clock divider setting (NDIV) and the resistance value connected to the SET pin (RSET).

What is the function of the DIV pin?

The DIV pin accepts a voltage level that sets the internal frequency divider ratio and selects the polarity configuration for the output transitions.

Can the delay be changed while the device is active?

Yes, the delay can be dynamically adjusted by changing the voltage on the DIV pin or the current into the SET pin after start-up.