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參數(shù)資料
| 型號： | LM4549BVH/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 消費家電 |
| 英文描述： | LM4549B AC '97 Rev 2.1 Multi-Channel Audio Codec with Sample Rate Conversion and National 3D Sound; Package: LQFP; No of Pins: 48; Qty per Container: 250/Tray |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| 封裝： | 7 X 7 MM, 1.40 MM HEIGHT, LQFP-48 |
| 文件頁數(shù)： | 28/28頁 |
| 文件大?。?/td> | 927K |
| 代理商： | LM4549BVH/NOPB |
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Connection Diagram
20123502
Top View
Order Number LM4549BVH
See NS Package Number VBH48A
Pin Descriptions
ANALOG I/O
Name
Pin
I / O
Functional Description
PC_BEEP
12
I
Mono Input
This line level (1 Vrms nominal) mono input is mixed equally into both channels of the Stereo
Mix signal at MIX2 under the control of the PC_Beep Volume control register, 0Ah. The
PC_BEEP level can be muted or adjusted from 0 dB to -45 dB in 3 dB steps. The Stereo Mix
signal feeds both the Line Out and Line Level Out analog outputs and is also selectable at
the Record Select Mux. During Initialization or Cold Reset, (reset pin held active low),
PC_BEEP is switched directly to both channels of the Line Out stereo output, bypassing all
volume controls. This allows signals such as PC power-on self-test tones to be heard through
the PC’s audio system before the codec registers are configured.
PHONE
13
I
Mono Input
This line level (1 Vrms nominal) mono input is selectable at the Record Select Mux for
conversion by either channel of the stereo ADC. It can also be mixed equally into both
channels of the Stereo Mix signal at MIX2 under the control of the Phone Volume register,
0Ch. The PHONE level can be muted or adjusted from +12 dB to -34.5 dB in 1.5 dB steps.
The Stereo Mix signal feeds both the Line Out and Line Level Out analog stereo outputs and
is also selectable at the Record Select Mux.
LM4549B
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相關PDF資料 |
PDF描述 |
|---|---|
| LM4549BVHX/NOPB | LM4549B AC '97 Rev 2.1 Multi-Channel Audio Codec with Sample Rate Conversion and National 3D Sound; Package: LQFP; No of Pins: 48; Qty per Container: 1000/Reel |
| LM4550BVH/NOPB | LM4550B AC '97 Rev 2.1 Multi-Channel Audio Codec with Stereo Headphone Amplifier, Sample Rate Conversion and National 3D Sound; Package: LQFP; No of Pins: 48; Qty per Container: 250/Tray |
| LM4550BVHX/NOPB | LM4550B AC '97 Rev 2.1 Multi-Channel Audio Codec with Stereo Headphone Amplifier, Sample Rate Conversion and National 3D Sound; Package: LQFP; No of Pins: 48; Qty per Container: 1000/Reel |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM4549BVHX | 功能描述:接口—CODEC RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| LM4549BVHX/NOPB | 功能描述:接口—CODEC RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| LM4549VH | 制造商:Texas Instruments 功能描述: |
| LM4549VHX | 制造商:Texas Instruments 功能描述: |
| LM4550 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:AC ’97 Rev 2.1 Multi-Channel Audio Codec with Stereo Headphone Amplifier, Sample Rate Conversion and National 3D Sound |
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