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MFG:OKI  Package Cooled:SOP28  

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Part Number: MSM7540

 

MFG: OKI

Package Cooled: SOP28

 

Description: The MSM7540/7560 are single channel ADPCM CODEC ICs which perform mutual transcoding between an analog...


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MSM7540 General Description


The MSM7540/7560 are single channel ADPCM CODEC ICs which perform mutual transcoding between an analog voice band signal 300 to 3400 Hz and 32 kbps ADPCM serial data.

Using advanced circuit technology, these devices operate using a single 5 V power supply and have low power consumption.

The MSM7540/7560 are optimized for advanced digital cordless telephone system applications.

MSM7540 Maximum Ratings

Symbol
Parameter
Conditions
Limits
Unit
VDD
 Power Supply Voltage
-
0 to 7
V
VAIN
 Analog Input Voltage
0.3 to VDD + 0.3
V
VDIN
 Digital Input Voltage
0.3 to VDD + 0.3
V
TSTG
 Storage Temperature
-
55 to +150
°C

MSM7540 Features

• ADPCM Algorithm : Complies completely with 1988's version ITU-T G.721 (32 kbps)
• Transmit/Receive Full-Duplex Operation
• Transmit/Receive Synchronous Mode Only
• Serial ADPCM Transmission Data Rate : 32 kbps to 2048 kbps
• Serial PCM Transmission Data Rate : 64 kbps to 2048 kbps
• PCM Interface Coding Format
   MSM7540 : A-law or Linear (14-bit, 2's compliment) Selectable
   MSM7560 : -law or Linear (14-bit, 2's compliment) Selectable
• Low Power Consumption
   Operating Mode : 60 mW Typ.
   Power-Down Mode : 1.0 mW Typ.
• Two Analog Input Amplifier Stages : Externally Adjustable Gain
• Analog Output Stage : Push-pull Drive (direct drive of 350 WÊ+ 120 nF)
• Built-in Crystal Oscillator (10.368 MHz)
• Built-in Reference Voltage Supply
• Option Reset Specified by ITU-T G. 721/ADPCM
• Package:
   28-pin plastic SOP (SOP28-P-430-1.27-K) (Product name: MSM7540GS-K)
                                                                    (Product name: MSM7560GS-K)

MSM7540 Connection Diagram

MSM7540 Connection Diagram

MSM7540 datasheet

MSM7540
PDF/DataSheet Download

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