E2U0028-28-82
¡ Semiconductor
MSM7570L-01/02
¡ Semiconductor
Multi-Function ADPCM CODEC
This version: Aug. 1998
MSM7570L-01/02
Previous version: Nov. 1996
GENERAL DESCRIPTION
The MSM7570L-01/02, developed for advanced digital cordless telephone systems, are single
channel ADPCM CODEC ICs which perform mutual transcoding between the analog voice band
signal and 32 kbps ADPCM serial data.
The devices include DTMF Tone and several types of tone generation, transmit/receive data
mute and gain control, side-tone path and gain control, and VOX function.
Using advanced circuit technology, these devices operate from a single 3 V power supply and
provide low power consumption.
Note: The MSM7570L–01differs from MSM7570L–02 in Ringing Tone Frequency.
FEATURES
• Single 3 V Power Supply Operation
V
DD
: 2.7 V to 3.6 V
ITU-T G.726 (32 kbps, 24 kbps, 16 kbps)
• ADPCM Algorithm :
• Full-Duplex Transmit/Receive Operation
• Transmit/Receive Synchronous Mode Only
A-law/µ-law Selectable
• PCM Data Format :
• Serial PCM/ADPCM Transmission Data Rate :64 kbps to 2048 kbps
• Low Power Consumption
Operating Mode :
21 mW Typ. (V
DD
= 3.0 V)
Power-Down Mode :
0.3 mW Typ. (V
DD
= 3.0 V)
Externally Adjustable Gain
• Two Analog Input Amplifier Stages :
Push-pull Drive (direct drive of 350
W
+ 120 nF)
• Analog Output Stage :
12.288/19.200 MHz Selectable
• Master Clock Frequency :
• Transmit/Receive Mute, Transmit/Receive Programmable Gain Control
(8-step Level Adjustment)
• Side Tone Path with Programmable Attenuation
• Built-in DTMF Tone Generator
• Built-in Various Ringing/Function Tones Generator
• Built-in Various Ring Back Tone Generator
• Serial MCU Interface Control
• Built-in Sounder Driving Amplifier
• Built-in VOX Control
Transmit side :
Voice Signal Detect
Receive side :
Background Noise Generation
• Characteristic Evaluation Board.
• Package:
32-pin plastic TSOP
(TSOPI32-P-814-0.50-1K)
(Product name: MSM7570L-01TS-K)
(Product name: MSM7570L-02TS-K)
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