LTC6905IS5-96#TRPBF

Programmable Timers And Oscillators Overview

The LTC6905IS5-96#TRPBF is a precision, fixed-frequency silicon oscillator from Analog Devices Inc., housed in a 5-lead ThinSOT (TSOT-23) package. It operates on a single supply voltage ranging from 2.7V to 5.5V and delivers a rail-to-rail CMOS output with a typical duty cycle of 50%. The device is factory-programmed for a master oscillation frequency of 96MHz, providing three selectable output frequencies via an internal divider: 96MHz (÷1), 48MHz (÷2), and 24MHz (÷4). Key electrical specifications include a typical frequency accuracy of ±0.5% at 25°C, a temperature stability of ±20ppm/°C, and a typical start-up time of 100µs.

Programmable Timers And Oscillators Feature Summary

• Factory-trimmed fixed frequency of 96MHz with selectable outputs of 96MHz, 48MHz, or 24MHz via the DIV pin.
• High frequency accuracy with ±0.5% typical error at 25°C and ±2.9% maximum over the -40°C to 85°C industrial range.
• Low profile 1mm ThinSOT (TSOT-23) package designed to minimize board space.
• Fast start-up time of typically 100µs and low timing jitter of less than 0.8%.

Programmable Timers And Oscillators Applications

• Data clocks for high reliability applications
• Clock sources in high vibration and high acceleration environments
• Replacement for fixed crystal and ceramic oscillators

Programmable Timers And Oscillators Procurement Notes

Verify the ordering suffix #TRPBF confirms the component is supplied in tape and reel packaging and is lead-free compliant. Confirm the 'I' grade designation matches the required -40°C to 85°C operating temperature range for the specific application environment.

Programmable Timers And Oscillators Selection Notes

Select this part when a compact, fixed-frequency clock source is needed without external trimming components. Ensure the power supply noise does not contain frequencies near fMO/64 (1.5MHz for this model) to maintain specified accuracy. Verify that the load requirements do not exceed the drive capability of the CMOS output stage.

Programmable Timers And Oscillators Part Context

This component belongs to the LTC6905-XXX series of fixed-frequency silicon oscillators. Other variants in the family include models programmed for 133MHz, 100MHz, and 80MHz master frequencies. The IS5 suffix indicates the Industrial temperature grade (-40°C to 85°C), distinct from the Commercial (CS5) and High Temperature (HS5) grades.

Programmable Timers And Oscillators Replacement Considerations

Direct functional replacements within the same package and specification family include the LTC6905IS5-100 (100MHz master) and LTC6905IS5-133 (133MHz master). For different frequency requirements, consider the LTC6905IS5-80 (80MHz master).

Programmable Timers And Oscillators FAQ

How are the three output frequencies selected?

The output frequency is determined by the state of the DIV pin (Pin 4). Tying DIV to V+ selects ÷1 (96MHz), leaving it floating selects ÷2 (48MHz), and tying it to GND selects ÷4 (24MHz).

What is the impact of power supply noise on frequency accuracy?

Frequency accuracy may be affected if the power supply contains noise at frequencies equal to fMO/64 or its multiples. For the LTC6905-96, this corresponds to 1.5MHz. Proper bypassing is required to mitigate this effect.

How does the Output Enable (OE) pin function?

Pulling the OE pin low asynchronously disables the output. Pulling it high synchronously enables the output on the next low-to-high clock transition, which prevents the generation of pulse slivers.