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參數(shù)資料
| 型號： | TDA8395 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 顏色信號轉(zhuǎn)換 |
| 英文描述： | SECAM decoder |
| 中文描述： | COLOR SIGNAL DECODER, PDIP16 |
| 封裝： | PLASTIC, SOT-38-1, DIP-16 |
| 文件頁數(shù)： | 4/10頁 |
| 文件大?。?/td> | 58K |
| 代理商： | TDA8395 |
October 1991
4
Philips Semiconductors
Preliminary specification
SECAM decoder
TDA8395
FUNCTIONAL DESCRIPTION
The TDA8395 is a self-calibrating SECAM decoder
designed for use with a baseband delay circuit.
During frame retrace a 4.433619 MHz reference frequency
is used to calibrate the filters and the demodulator. The
reference frequency should be very stable during this
period.
The Cloche filter is a gyrator-capacitor type filter the
resonance frequency of which is controlled during the
calibration period and offset during scan; this ensures the
correct frequency during calibration.
The demodulator is a Phase-Locked Loop (PLL) type
demodulator which uses the frequency reference and the
bandgap reference to force the PLL to the required
demodulation characteristic.
The low frequency de-emphasis is matched to the PLL and
is controlled by the tuning voltage of the PLL.
A digital identification circuit scans the incoming signal for
SECAM (only line-identification is implemented). The
identification circuit needs to communicate with the
TDA8362 to guarantee that the output signal from the
decoder is only available when no PAL signal has been
identified. If a SECAM signal is decoded a request for
colour-on is transmitted to pin 1 (current is sunk). If the
signal request is granted (i.e. pin 1 is HIGH therefore no
PAL) the colour difference outputs (
(B
Y) and
(R
Y))
from the TDA8362 are high impedance and the output
signals from the TDA8395 are switched ON.
If no SECAM signal is decoded during a two-frame period
the demodulator will be initialized before another attempt
is made also during a two-frame period. The CD outputs
will be blanked or high-impedance depending on the logic
level at pin 1.
A two-level sandcastle pulse generates the required
blanking periods and, also, clocks the digital identification
pulse on the falling edge of the burst gate pulse. To enable
the calibration period to be defined the vertical retrace is
discriminated from the horizontal retrace, this is achieved
by measuring the width of the blanking period.
LIMITING VALUES
In accordance with the Absolute Maximum System (IEC 134)
SYMBOL
PARAMETER
MIN.
MAX.
UNIT
V
P
T
stg
T
amb
positive supply voltage
storage temperature range
operating ambient temperature range
25
25
8.8
+150
+70
V
°
C
°
C
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA8395P | 制造商:Panasonic Industrial Company 功能描述:IC |
| TDA8395T/N3,112 | 功能描述:IC DECODER SECAM 20-SOIC RoHS:是 類別:集成電路 (IC) >> 接口 - 編碼器，解碼器，轉(zhuǎn)換器 系列:- 產(chǎn)品變化通告:Development Systems Discontinuation 26/Apr/2011 標(biāo)準(zhǔn)包裝:1 系列:- 類型:編碼器 應(yīng)用:DVB-S.2 系統(tǒng) 電壓 - 電源，模擬:- 電壓 - 電源，數(shù)字:- 安裝類型:- 封裝/外殼:模塊 供應(yīng)商設(shè)備封裝:模塊 包裝:散裝 其它名稱:Q4645799 |
| TDA8405 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:TV AND VTR STEREO/DUAL SOUND PROCESSOR WITH I2C BUS CONTROL |
| TDA8415 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:TV and VTR stereo/dual sound processor with integrated filters and I2C-bus control |
| TDA8416 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:TV and VTR stereo/dual sound processor with integrated filters and I2C-bus control |
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