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參數(shù)資料
| 型號： | TDA9875 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | Digital TV Sound Processor DTVSP |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP64 |
| 文件頁數(shù)： | 11/92頁 |
| 文件大?。?/td> | 279K |
| 代理商： | TDA9875 |
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1998 Feb 13
11
Philips Semiconductors
Preliminary specification
Digital TV Sound Processor (DTVSP)
TDA9875
6.1.8
NICAM
AUTO
-
MUTE
This function is enabled by setting bit AMUTE LOW
subaddress 14 (see Section 10.3.11). Upper and lower
error limits may be defined by writing appropriate values to
two registers in the I
2
C-bus section (subaddresses 16 and
17; see Sections 10.3.13 and 10.3.14). When the number
of errors in a 128 ms period exceeds the upper error limit
the auto-mute function will switch the output sound from
NICAM to whatever sound is on the first sound carrier
(FM or AM). When the error count is smaller than the lower
error limit the NICAM sound is restored.
The auto-mute function can be disabled by setting bit
AMUTE HIGH. In this condition clicks become audible
when the error count increases; the user will hear a signal
of degrading quality.
A decision to enable/disable the auto-muting is taken by
the microcontroller based on an interpretation of the
application control bits C1, C2, C3 and C4 and, possibly,
any additional strategy implemented by the set maker in
the microcontroller software.
When the AM sound in NICAM L systems is demodulated
in the 1st sound IF and the audio signal connected to the
mono input of the TDA9875, the controlling microcontroller
must implement the switching from NICAM reception to
mono input, if auto-muting is desired.
6.1.9
C
RYSTAL OSCILLATOR
A circuit diagram of the external components of the
voltage-controlled crystal oscillator is illustrated in Fig.8
(see Chapter 12).
6.1.10
T
EST PINS
Both test pins are active HIGH, in normal operation of the
device they are wired to V
SSD1
. Test functions are for
manufacturing tests only and are not available to
customers. Without external circuitry these pads are pulled
down to LOW level with internal resistors.
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| TDZ11 | Low Current Operation at 250 ，Low Reverse Leakage,Low Noise Zener Diode |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA9875A | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital TV Sound Processor DTVSP |
| TDA9875AH | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital TV Sound Processor DTVSP |
| TDA9875AH/V2,557 | 功能描述:IC SOUND PROC DGTL TV 64QFP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻處理 系列:- 其它有關(guān)文件:STA321 View All Specifications 標(biāo)準(zhǔn)包裝:1 系列:Sound Terminal™ 類型:音頻處理器 應(yīng)用:數(shù)字音頻 安裝類型:表面貼裝 封裝/外殼:64-LQFP 裸露焊盤 供應(yīng)商設(shè)備封裝:64-LQFP EP（10x10） 包裝:Digi-Reel® 其它名稱:497-11050-6 |
| TDA9880 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Alignment-free multistandard vision and FM sound IF-PLL demodulator |
| TDA9880T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Alignment-free multistandard vision and FM sound IF-PLL demodulator |
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