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參數(shù)資料
| 型號(hào)： | TDA9874AH |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 接收器 |
| 英文描述： | Digital TV sound demodulator/decoder |
| 中文描述： | AM/FM, AUDIO DEMODULATOR, PQFP44 |
| 封裝： | 14 X 14 MM, 2.20 MM HEIGHT, PLASTIC, SOT-205-1, QFP-44 |
| 文件頁(yè)數(shù)： | 36/68頁(yè) |
| 文件大小： | 231K |
| 代理商： | TDA9874AH |
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1999 Dec 03
36
Philips Semiconductors
Preliminary specification
Digital TV sound demodulator/decoder
TDA9874A
Table 33
De-emphasis
Notes
1.
2.
The FM de-emphasis gain is 0 dB at 40 Hz.
Not used in any known terrestrial TV sound standard. NICAM de-emphasis is selected in the NICAM configuration
register; see Table 41.
10.3.9
FM
DE
M
ATRIX
R
EGISTER
(FMMR)
This register is used to select the proper dematrixing characteristics as appropriate for the standard of the received
carrier and the related sound mode identification. For the dematrixing, it is assumed that the output from sound carrier 1
is on channel 1 input. Bits 3 to 6 are not used.
The default setting after power-on reset is ‘0000 0000’.
Table 34
FM dematrix register (subaddress 11)
Table 35
Description of the FMMR bits
FMDSC23; FMDSC13
FMDSC22; FMDSC12
FMDSC21;FMDSC11
DE-EMPHASIS
(1)
50
μ
s
60
μ
s
75
μ
s
J17
(2)
off
0
0
0
0
1
0
0
1
1
0
0
1
0
1
0
7
6
5
4
3
2
1
0
IDSWFM
0
0
0
0
FDMS2
FDMS1
FDMS0
BIT
SYMBOL
DESCRIPTION
7
IDSWFM
Automatic FM-dematrix switching:
if set to logic 1, the FM dematrix is switched
automatically in dependence on the current FM identification result. In case of stereo,
the type of stereo dematrixing (Europe or Korea) is determined by bit IDAREA in
subaddress 9. Bits FDMS2, FDMS1 and FDMS0 are ignored and the dematrix output is
set according to Table 37. With channel 2 in NICAM mode, mono (channel 1) is always
selected.
these 4 bits are not used and should be set to logic 0
6
5
4
3
2
1
0
FDMS2
FDMS1
FDMS0
Dematrixing characteristics select:
the state of these 3 bits select the dematrixing
characteristics; see Table 36
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA9874AH/V2,557 | 功能描述:音頻放大器 DIGITAL STEREO DECODER VCR RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TDA9874AHB | 功能描述:音頻放大器 DIGITAL STEREO DECODER VCR RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TDA9874APS | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital TV sound demodulator/decoder |
| TDA9874H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital TV sound demodulator/decoder |
| TDA9875 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital TV Sound Processor DTVSP |
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