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FEATURES DESCRIPTION
APPLICATIONS
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VIDSEL
REF_IN
PLL1VDD
VIDCLK
PLL1VSS
PLL2VDD
AUDCLK
PLL2VSS
AUDSEL
MCSEL
ASICCLK
PLL3VDD
PLL3VSS
CPUCLK
PLL3VDD
PLL3VSS
USBCLK
PLL3VDD
PLL3VSS
MCCLK
PW PACKAGE
(TOP VIEW)
CDC5806
SCAS760A – MARCH 2004 – REVISED JULY 2004
THREE PLLs BASED CLOCK GENERATOR FOR DIGITAL TV APPLICATIONS
• High Performance Clock Generator
The CDC5806 is a clock generator which synthesizes
video clocks, audio clocks, CPU clock, ASIC clock,
• Clock Input Compatible With LVCMOS/LVTTL
USB clock, and a memory card clock from a 54-MHz
• Requires a 54-MHz Input Clock to Generate
system clock.
Multiple Output Frequencies
Three phase-locked loops (PLLs) are used to
• Low Jitter for Clock Distribution
generate the different frequencies from the system
• Generates the Following Clocks:
clock. On-chip loop filters and internal feedback
– VIDCLK 74.175824 MHz/54 MHz
eliminate the need for external components.
(Buffered)
Since the CDC5806 is based on PLL circuitry, it
– AUDCLK 16.9344 MHz/12.288 MHz
requires a stabilization time to achieve phase-lock of
the PLLs. The PLL stabilization time begins after the
– CPUCLK 64 MHz
reference clock input has a stable phase and
– ASICCLK 32 MHz
frequency.
– USBCLK 48 MHz
The device operates from a single 3.3-V supply
– MCCLK 38.4 MHz/19.2 MHz/12 MHz
voltage. The CDC5806 device is characterized for
• Operates From Single 3.3-V Supply
operation from -40°C to 85°C.
• Low Peak-to-Peak Period Jitter (150 ps
Max)
• PLLs Are Powered Down, if No Valid REF_IN
Clock (< 5 MHz) is Detected or the
V
DD
is Below 2 V
• PLL Loop Filter Components Integrated
• Packaged in TSSOP (PW) 20-Pin Package
• Industrial Temperature Range -40°C to
85°C Applications
• Digital Television With a Memory Card
Interface
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2004, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
