參數(shù)資料
型號: MT92303
廠商: Mitel Networks Corporation
元件分類: Codec
英文描述: 3.3V Quad Interface, Dual Codec(3.3V 四接口雙編解碼器(提供音頻到PCM的接口))
中文描述: 3.3四種接口,雙編解碼器(3.3四接口雙編解碼器(提供音頻到的PCM的接口))
文件頁數(shù): 1/34頁
文件大?。?/td> 166K
代理商: MT92303
1
Features
Two PCM Codecs (ITU-T G.711/G.712, 8kHz
PCM)
Four Audio TX/RX Interfaces
Single 3.3V Power Supply
Flexible Voice Data Port Works in ST-bus, GCI
and SSI Modes
Serial MicroPort Interface Compatible with
Motorola, Intel and National Semiconductor
Low External Component Count
Low Power (43mW typical)
Power-Down Mode
Differential Microphone Inputs
Programmable Bias Voltage Output for Electret
Microphones
Microphone Presence Detection
Microphone Mute
Programmable Microphone Gain (0dB to
+46.5dB in 1.5dB Steps)
ITU-T G.712 High-Pass and Low-Pass TX
Filtering
Programmable Sidetone Gain (-39dB to +6dB in
3dB Steps)
Sidetone Mute
Differential Earpiece Driver Outputs
66mW rms into 32 Ohms
150mW rms into 16 Ohms
Programmable Earpiece Gain (-28dB to +2dB in
2dB Steps)
Programmable RX Volume Control (-21dB to
0dB in 3dB Steps)
RX Channel Mute
ITU-T G.712 Low-Pass RX Filtering
Programmable/Optional RX Hi-Pass Filter (6
Corner Frequencies in Range 40Hz-400Hz)
Three PCM Data Formats - 16-bit Linear,
companded ITU-T A-law or U-law
Cross-Point Connects PCM Channels to any of
the Four Audio TX/RX Interfaces
Auxiliary Ringing/Announcement Input (to Loud
Speaker Outputs)
Loopback Test Mode
Applications
Digital Telephone Sets
VoIP Enterprise Telephones
Figure 1 - Functional Block Diagram
4
4
PLL
Serial
Microport
Interface
G.712
Codec
#1
Crosspoint
G.712
Codec
#0
PCM
Voice
Interface
VREF
Audio Interface
#3
Audio Interface
#2
Audio Interface
#1
Audio Interface
#0
AUXTONE
EAR
MIC
BIAS
MICDET
RESETB
EAR
MIC
BIAS
MICDET
EAR
MIC
EAR/SPEAKER
MIC
BIAS
SYSCLK
DS5320
ISSUE 1
March 2000
Ordering Information
MT92303/PR/GP1N
44 Pin MQFP
-40 to +85 C
MT92303
3.3V Quad Interface, Dual Codec
Preliminary Information
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