參數(shù)資料
型號(hào)： SAA5520
廠商： NXP Semiconductors N.V.
英文描述： Standard TV Microcontrollers with On-Screen Display(OSD)
中文描述： 微控制器與標(biāo)準(zhǔn)電視屏幕顯示（OSD）
文件頁(yè)數(shù)： 73/80頁(yè)
文件大?。?/td> 340K
代理商： SAA5520
1999 Oct 27
73
Philips Semiconductors
Preliminary specification
Standard TV microcontrollers with
On-Screen Display (OSD)
SAA55xx
25 ELECTROMAGNETIC COMPATIBILITY (EMC)
GUIDELINES
Optimization of circuit return paths and minimisation of
common mode emission will be assisted by using a double
sided Printed-Circuit Board (PCB) with low inductance
ground plane.
Onasinglesidedprinted-circuitboardalocalgroundplane
under the whole Integrated Circuit (IC) should be present
as shown in Fig.30. This should be connected by the
widest possible connection back to the printed-circuit
board ground connection, and bulk electrolytic decoupling
capacitor. It should preferably not connect to other
grounds on the way, and no wire links should be present in
this connect. The use of wire links increases ground
bounce by introducing inductance into the ground.
The supply pins can be decoupled at the pin to the ground
plane under the IC. This is easily accomplished using
surface mount capacitors, which are more effective than
leaded components at high frequency.
Using a device socket will unfortunately add to the area
and inductance of the external bypass loop.
A ferrite bead or inductor with resistive characteristics at
high frequencies may be utilised in the supply line close to
the decoupling capacitor to provide a high impedance.
To prevent pollution by conduction onto the signal lines
(which may then radiate) signals connected to the V
DD
supply via a pull-up resistor should not be connected to
the IC side of this ferrite component.
OSCGND should be connected only to the crystal load
capacitors and not to the local or circuit ground.
Physical connection distances to associated active
devices should be short.
Output traces should be routed with close proximity to
mutually coupled ground return paths.
Fig.30 Power supply connections for EMC.
handbook, full pagewidth
electrolytic decoupling capacitor (2
μ
F)
ferrite beads
SM decoupling capacitors (10 to 100 nF)
under-IC GND plane
IC
MBK979
VSSC
VSSA
V
V
V
V
GND
+
3.3 V
other
GND
connections
under-IC GND plane
GND connection
note: no wire links
相關(guān)PDF資料
PDF描述
SAA5520PS Standard TV Microcontrollers with On-Screen Display(OSD)
SAA5521PS Standard TV Microcontrollers with On-Screen Display(OSD)
SAA5522PS Standard TV Microcontrollers with On-Screen Display(OSD)
SAA5523PS Standard TV Microcontrollers with On-Screen Display(OSD)
SAA5552PS Standard TV Microcontrollers with On-Screen Display(OSD)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SAA5520PS 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Standard TV Microcontrollers with On-Screen Display(OSD)
SAA5521PS 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Standard TV Microcontrollers with On-Screen Display(OSD)
SAA5522PS 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Standard TV Microcontrollers with On-Screen Display(OSD)
SAA5523PS 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Standard TV Microcontrollers with On-Screen Display(OSD)
SAA5530 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Enhanced TV microcontrollers with On-Screen Display OSD
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