MK2761ASTR

Overview

The MK2761ASTR is a clock synthesizer manufactured by Integrated Device Technology (IDT), now part of Renesas Electronics Corporation. Designed for set-top box applications, it accepts a 27 MHz crystal or clock input to generate multiple output clocks via analog PLL techniques. Key outputs include a 16.67 MHz processor clock, fixed 27 MHz and 3.6864 MHz clocks, and selectable audio clocks frequency-locked to the video reference with zero ppm error. The device operates at 5.0 V ±10% and features low jitter performance.

Feature Summary

• Generates multiple synchronized clocks from a single 27 MHz input
• Zero ppm error ensures audio and video frequencies track exactly
• Selectable audio sampling frequencies: 8.192, 11.2896, 12.288, and 5.6448 MHz
• Packaged in a 16-pin narrow SOIC (150 mil) with tape and reel shipping

Applications

• Set-top box systems
• Multimedia clock distribution
• Audio/Video synchronization circuits

Procurement Notes

Verify that the 'TR' suffix indicates Tape and Reel packaging. Confirm the manufacturer is IDT/Renesas. Check for RoHS compliance status as non-green parts had an EOL date of May 13, 2010. Ensure the component is suitable for commercial temperature ranges only.

Selection Notes

Select this component if a 5V supply is available and a 27 MHz reference is required. It provides specific fixed outputs like 16.67 MHz and 3.6864 MHz. Verify that the 16.67 MHz processor clock meets system timing requirements. Ensure the application does not require extended temperature ranges beyond 0 to +70 °C.

Part Context

The MK2761A is part of IDT's Set-top Box clock synthesizer family. The 'STR' suffix denotes the Tape and Reel packaging variant. The device utilizes advanced sub-micron CMOS process technology for low power consumption while maintaining high performance for multimedia applications.

Replacement Considerations

Consult IDT/Renesas for current equivalents as the original datasheet notes an End-of-Life for non-green parts in 2010. Verify pin compatibility and electrical specifications before substituting with other clock synthesizers.