參數(shù)資料
型號: TVP5154AIPNPR
廠商: TEXAS INSTRUMENTS INC
元件分類: 顏色信號轉(zhuǎn)換
英文描述: COLOR SIGNAL DECODER, PQFP128
封裝: PLASTIC, HTQFP-128
文件頁數(shù): 15/92頁
文件大?。?/td> 1089K
代理商: TVP5154AIPNPR
124
XIN/OSC
14.31818-MHz
Crystal
CL1
CL2
XOUT
123
R
TVP5154A
124
XIN/OSC
XOUT
123
TVP5154A
14.31818-MHz
1.8-V Clock
NC
SLES214C – DECEMBER 2007 – REVISED SEPTEMBER 2010
www.ti.com
5
Clock Circuits
An internal line-locked PLL generates the system and pixel clocks. A 14.31818-MHz clock is required to
drive the PLL. This may be input to the TVP5154A decoder on terminal 124 (XIN), or a crystal of
14.31818-MHz fundamental resonant frequency may be connected across terminals 123 and 124 (XIN
and XOUT). Figure 5-1 shows the reference clock configurations. For the example crystal circuit shown (a
parallel-resonant crystal with 14.31818-MHz fundamental frequency), the external capacitors must have
the following relationship:
CL1 = CL2 = 2CL – CSTRAY
where CSTRAY is the terminal capacitance with respect to ground and CL is the crystal load capacitance
specified by the crystal manufacturer. Figure 5-1 shows the reference clock configurations.
NOTE: The resistor (R) in parallel with the crystal is recommended to support a wide range of crystal types. A 100-k
Ω resistor
may be used for most crystal types.
Figure 5-1. Clock and Crystal Connectivity
22
Clock Circuits
Copyright 2007–2010, Texas Instruments Incorporated
Product Folder Link(s): TVP5154A
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