MSM7708-02 Datasheet, PDF (1/38 Pages) OKI electronic componets – Serial Register Interface ADPCM CODEC for Telephone Recording

E2U0044-16-X2
¡ Semiconductor ^{¡ Semiconductor}
This versio_Mn:_SJ_Man₇.₇1₀9₈9_-8₀₂
Previous version: Nov. 1996
MSM7708-02
Serial Register Interface ADPCM CODEC for Telephone Recording
GENERAL DESCRIPTION
The MSM7708-02 is a CMOS IC developed for applying to PHS (Personal Handyphone System).
This device provides a CODEC function which performs transcoding between the voice band
analog signal and 32 kbps ADPCM data. It also provides a serial register interface function for
telephone call recording.
Provided with such functions as DTMF tone and several kinds of tone generation, transmit/
receive data mute and gain control, side-tone pass, and voice/silence detection, the MSM7708-
02 is best suited for PHS handsets.
FEATURES
• Single 3 V power supply operation (V_DD: 2.7 V to 3.6 V)
• Low power consumption
When system is operating: 6 mA typ.
When powered down: 0.02 mA typ.
(ADPCM CODEC)
• ADPCM: ITU-T Recommendations G.721 (32 kbps)
• Transmit/receive full duplex capability
• PCM interface code format: m-law or A-law selectable
• Serial ADPCM and PCM transmission rate: 64 kbps to 2,048 kbps
• Transmit/receive mute function; transmit/receive programmable gain setting
• Side tone generator (8-step level adjustment)
• Built-in DTMF tone, ringing tone, and various tone generators
• Built-in VOX function
(Serial Register Interface)
• Interface for a serial register: 1 Mb (MSM63V89C), 4 Mb (MSM6684), 8 Mb (MSM6685)
• Interface for a serial voice ROM: 1 Mb (MSM6595A), 2 Mb (MSM6596A), 3 Mb (MSM6597A)
• Maximum recording time: 32 s (1 Mb), 128 s (4 Mb), 256 s (8 Mb)
• Maximum recording channels: 32 ch
• Playback data transmit/receive selectable
• Package:
64-pin plastic TQFP (TQFP64-P-1010-0.50-K) (Product name : MSM7708-02TS-K)
1/38