LTC6991HS6#WTRPBF

Programmable Timers And Oscillators Overview

The LTC6991HS6#WTRPBF 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), achieving less than 1.5% maximum frequency error. The device operates on a single supply voltage between 2.25V and 5.5V, with a typical supply current ranging from 55µA to 80µA depending on the clock period.

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
• Output reset function allows truncation of pulses or prevention of oscillation
• CMOS output driver capable of sourcing/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 automotive grade designation (#W suffix) and the specific temperature range (-40°C to 125°C) against project requirements. Confirm the SOT-23 package type and tape and reel packaging details match the assembly specifications. Ensure compatibility with AEC-Q100 qualified manufacturing processes if used in automotive applications.

Programmable Timers And Oscillators Selection Notes

Select the LTC6991HS6#WTRPBF for applications requiring low-frequency oscillation up to several hours. Use the DIV pin voltage to configure the frequency divider ratio and output polarity. Calculate RSET based on the desired period and selected NDIV value. Ensure the driving impedance on the DIV pin does not exceed 500kΩ and capacitance remains below 100pF for stable operation.

Programmable Timers And Oscillators Part Context

This component belongs to the Analog Devices TimerBlox family of versatile silicon timing devices. The HS6 suffix indicates the high temperature grade (-40°C to 125°C) and the S6 package (6-lead Plastic TSOT-23). The #W suffix denotes automotive qualification. Other variants include different temperature grades and packages such as DFN.

Programmable Timers And Oscillators Replacement Considerations

Direct replacements within the same family include LTC6991IS6#WTRPBF for commercial temperature range (-40°C to 85°C) or LTC6991MPS6#WTRPBF for extended military temperature range (-55°C to 125°C). Verify that the substitute part maintains the required operating temperature range and automotive qualification status.