MK2705S

Overview

The MK2705S is an audio clock source and clock synthesizer manufactured by Renesas Electronics Corporation, originally developed by IDT. It provides synchronous clock generation for audio sampling rates derived from MPEG streams or operates as a standalone source with a 27 MHz crystal input. The device utilizes PLL technology to deliver low phase noise and jitter characteristics within an 8-pin SOIC package. It supports exact 0 ppm multiplication ratios and independent output voltage settings. Key electrical parameters include a maximum frequency of 24.576 MHz, a supply voltage range of 3V to 3.6V, and operation within a temperature range of 0°C to 70°C.

Feature Summary

• Supports 256 times sampling rate with exact (0 ppm) multiplication ratios
• Low phase noise and low jitter performance using advanced PLL technology
• Independent output voltage supply (VDDO) ranging from 1.8V to VDD
• Accepts 27 MHz crystal or clock input via X1/REFIN and X2 pins

Applications

• Audio sampling clock generation for MPEG streams
• Standalone clock source applications requiring 27 MHz input
• Set-top box and multimedia systems
• Digital audio processing circuits

Procurement Notes

Verify component status carefully as the MK2705 series has reached End-of-Life (EOL). Non-green parts faced EOL on 5/13/10. Current availability may be limited to existing stock or obsolete inventory. Confirm RoHS compliance and specific ordering suffixes (e.g., LF for lead-free) against current manufacturer documentation before procurement.

Selection Notes

Select this component when precise audio clock synchronization with zero ppm error is required relative to a 27 MHz reference. Ensure the design accommodates the 3V to 3.6V supply range and 8-SOIC package constraints. Consider PCB layout guidelines for decoupling and crystal load capacitors to maintain specified jitter and phase noise performance.

Part Context

The MK2705 belongs to the IDT/Renesas family of audio clock synthesizers designed to replace discrete oscillators and PLL circuits in multimedia applications. It integrates a crystal oscillator and PLL circuitry into a single small package, simplifying board design for set-top boxes and digital audio equipment by eliminating external VCXOs or crystals.

Replacement Considerations

Public confirmed substitute part number: 5P35021B-000NDGI (Renesas Electronics Corporation). Verify functional compatibility and pinout alignment before substitution.