LTC6991HDCB#TRMPBF

Programmable Timers And Oscillators Overview

The LTC6991HDCB#TRMPBF is a silicon oscillator from the TimerBlox family, designed for long duration timing events. It features a programmable period range of 1.024ms to 9.54 hours (29.1µHz to 977Hz). The output clock period is determined by an internal master oscillator and a programmable frequency divider (NDIV) with eight settings from 1 to 2^21. Frequency is set via a single resistor (RSET) between the SET and GND pins. The device operates on a single supply voltage of 2.25V to 5.5V and includes a reset function to truncate pulses or prevent oscillation. It is housed in a 6-lead DFN package.

Programmable Timers And Oscillators Feature Summary

• Programmable period range from 1.024ms to 9.54 hours using one to three resistors
• Less than 1.5% maximum frequency error over temperature and supply variations
• Output reset function allows pulse truncation or oscillation inhibition
• CMOS output driver capable of sourcing and sinking 20mA

Programmable Timers And Oscillators Applications

• Heartbeat timers
• Watchdog timers
• Intervalometers
• Periodic wake-up calls
• Portable and battery-powered equipment

Programmable Timers And Oscillators Procurement Notes

Verify the specific suffix #TRMPBF indicates a tape and reel packaging configuration containing 500 pieces. Confirm that the HDCB designation corresponds to the 6-lead (2mm × 3mm) plastic DFN package. Ensure the H grade specifies the operating temperature range of –40°C to 125°C as required for the application environment.

Programmable Timers And Oscillators Selection Notes

Select this component when a low-frequency oscillator with high accuracy and wide period range is needed. Use the RSET resistor to program the master oscillator frequency and the DIV pin voltage to select the divider ratio and output polarity. Consider the supply current consumption, which ranges from 55µA to 80µA depending on the clock period, for battery-operated designs.

Programmable Timers And Oscillators Part Context

This part belongs to the Analog Devices TimerBlox family of versatile silicon timing devices. The LTC6991 series includes variants with different packages and temperature grades. The HDCB variant specifically utilizes the DFN package and is rated for industrial/high-temperature applications (-40°C to 125°C), distinguishing it from the SOT-23 packaged versions.

Programmable Timers And Oscillators Replacement Considerations

Other TimerBlox parts like the LTC6992 or LTC6993 offer similar functionality but may differ in specific features such as monostable operation or different package options. Verify pin compatibility and electrical specifications before substitution.