Programmable Multiple-Output Clock Generator Provides a Cost-Efficient Solution for MPEG-2 Audio Systems such as DVD Players, DVD Drives for Multimedia PCs, Digital HDTV Systems, Home-Entertainment Centers, and Set-Top Boxes
The MAX9485 programmable multiple-output clock generator provides a cost-efficient solution for MPEG-2 audio systems such as DVD players, DVD drives for multimedia PCs, digital HDTV systems, home entertainment centers, and set-top boxes.
The MAX9485 accepts an input reference frequency of 27MHz from a crystal or system reference clock. The device provides two buffered clock outputs of 256, 384, or 768 times the chosen sampling frequency (fS) selected through an I²C interface or hardwired inputs. Sampling frequencies of 12kHz, 32kHz, 44.1kHz, 48kHz, 64kHz, 88.2kHz, or 96kHz are available. The MAX9485 also offers a buffered 27MHz output and an integrated voltage-controlled oscillator (VCXO) that is tuned by a DC voltage generated from the MPEG processor. The use of VCXO allows the audio system clock to lock with the overall system clock.
The MAX9485 features the lowest jitter in its class, guaranteeing excellent dynamic performance with audio ADCs and DACs in an MPEG-2 audio system. The device operates with a 3.3V supply and is specified over the -40°C to +85°C extended temperature range. The MAX9485 is offered in 6.5mm x 4.4mm 20-pin TSSOP and 4mm x 4mm 20-pin thin QFN packages.
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