LTC6909IMS#PBF

Programmable Timers And Oscillators Overview

The LTC6909IMS#PBF is a precision silicon oscillator from Analog Devices, housed in a 16-lead plastic MSOP package. It provides up to eight synchronized rail-to-rail clock outputs with configurable phase separation ranging from 45° to 120°. The output frequency is determined by a single external resistor and the selected phase count, covering a range from 12.5kHz to 6.67MHz. Key electrical parameters include a supply voltage range of 2.7V to 5.5V, a typical supply current of 400µA, and fast start-up time. The device supports optional spread spectrum frequency modulation (SSFM) to improve electromagnetic compatibility.

Programmable Timers And Oscillators Feature Summary

• Generates 1 to 8 synchronized multiphase outputs with programmable phase separation.
• Frequency set by a single external resistor; range spans 12.5kHz to 6.67MHz.
• Optional spread spectrum frequency modulation (SSFM) for improved EMC performance.
• Outputs can be held low or configured for high impedance (Hi-Z).

Programmable Timers And Oscillators Applications

• Providing synchronizing clocks to multiple switching power supplies.
• Clock distribution for multi-phase DC/DC converter systems.
• Electromagnetic interference (EMI) reduction in sensitive digital circuits.

Programmable Timers And Oscillators Procurement Notes

Verify that the component matches the specific temperature grade indicated by the suffix 'I', which denotes operation from -40°C to 85°C. Confirm the package type is the 16-lead MSOP. Ensure the ordering suffix '#PBF' corresponds to lead-free and RoHS compliance requirements for the intended assembly process.

Programmable Timers And Oscillators Selection Notes

Select this part when an application requires multiple synchronized clock phases derived from a single master oscillator. The frequency accuracy depends on the tolerance of the external RSET resistor; use precision resistors between 20kΩ and 400kΩ for optimal performance. Consider the SSFM feature if reducing peak EMI emissions is a primary design constraint.

Programmable Timers And Oscillators Part Context

This component belongs to the LTC6909 family of silicon oscillators designed for multiphase synchronization. It serves as a central clock source for coordinating multiple power management ICs. The IMS8 designation indicates the industrial temperature grade and the MSOP surface-mount package format.

Programmable Timers And Oscillators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pinout and electrical specifications against any alternative sources before implementation.