LTC6905HS5#TRPBF

Programmable Timers And Oscillators Overview

The LTC6905HS5#TRPBF is a precision, programmable silicon oscillator from Analog Devices Inc., housed in a 5-lead plastic SOT-23 (TSOT-23) package. It generates output frequencies ranging from 17MHz to 170MHz, set by a single external resistor ($R_{SET}$) between 10kΩ and 25kΩ connected to the SET pin. The device operates on a single supply voltage of 2.7V to 5.5V with a typical supply current of 6mA at 100MHz. It features a three-state divider input allowing division by 1, 2, or 4, providing three distinct frequency ranges for each resistor value. The part is specified for an operating temperature range of –40°C to 125°C.

Programmable Timers And Oscillators Feature Summary

• Frequency Range: 17MHz to 170MHz via single external resistor
• Temperature Grade: Extended industrial (-40°C to 125°C)
• Supply Voltage: 2.7V to 5.5V single supply operation
• Output Driver: CMOS rail-to-rail square wave with 50% duty cycle

Programmable Timers And Oscillators Applications

• High frequency precision clock generation
• Replacement for fixed crystal oscillators
• Replacement for ceramic resonators/oscillators
• Clocking for high-speed data buses

Programmable Timers And Oscillators Procurement Notes

Verify the ordering suffix '#TRPBF' confirms lead-free finish and tape-and-reel packaging. Confirm the 'H' suffix indicates the -40°C to 125°C temperature grade. Ensure the 'S5' designation matches the TSOT-23-5 package requirement. Cross-reference the manufacturer part number with official Analog Devices documentation to validate authenticity and revision status.

Programmable Timers And Oscillators Selection Notes

Select this variant when extended temperature operation up to 125°C is required. Use the internal divider settings (DIV pin tied to V+, GND, or left floating) to achieve specific frequency bands within the 17MHz–170MHz range. Ensure $R_{SET}$ tolerance is accounted for, as it directly impacts total frequency accuracy. For applications requiring higher accuracy without external components, consider the fixed-frequency LTC6905-XXX series instead.

Programmable Timers And Oscillators Part Context

The LTC6905 family includes variants differentiated by temperature grade and packaging. The 'C' suffix denotes commercial grade (0°C to 70°C), 'I' denotes industrial grade (-40°C to 85°C), and 'H' denotes extended industrial grade (-40°C to 125°C). The 'MP' suffix indicates military-grade performance. All variants share the same electrical characteristics and pinout but differ in thermal specifications and reliability testing standards.

Programmable Timers And Oscillators Replacement Considerations

Direct functional replacements include other LTC6905 variants with different temperature grades (e.g., LTC6905IS5#TRPBF for -40°C to 85°C) if the extended temperature range is not critical. Fixed-frequency versions like LTC6905HS5-100#TRPBF offer simplified design but lack programmability. Ensure any substitute maintains the SOT-23-5 footprint and compatible supply voltage range.