MK2761AS

SET TOP CLOCK SOURCE
The MK2761A is a low-cost, low-jitter, high-performance clock synthesizer for set-top box applications. Using analog Phase-Locked Loop (PLL) techniques, the device accepts a 27 MHz crystal or clock input to produce multiple output clocks including the processor clock, the UART clock, a selectable audio clock, and four low skew copies of the 27 MHz. The audio clocks are frequency-locked to the 27 MHz using our patented zero ppm error techniques. This allows audio and video to track exactly, thereby eliminating the need for large buffer memory.

Packaged in a 16-pin narrow (150 mil) SOIC

Available in Pb (lead) free package

Selectable audio sampling frequencies support 32, 44.1, and 48 kHz in most DACs

27 MHz crystal or clock input

Processor frequency of 16.67 MHz

Fixed clocks of 27 and 3.6864 MHz

Zero ppm in audio clocks exactly track video frequency

25 mA output drive capability at TTL levels

Advanced, low-power, sub-micron CMOS process

Operating voltage of 5.0 V ±10%