MSM7718-01 データシートの表示（PDF） - Oki Electric Industry

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MSM7718-01

Echo Canceler with ADPCM CODEC

Oki Electric Industry 

¡ Semiconductor

MSM7718-01

AC Characteristics (DTMF and Other Tones)

Parameter

Symbol

Condition

(VDD = 2.7 to 3.6 V, Ta = –25 to +70°C)

Min. Typ. Max. Unit

Frequence Deviation

Tone Reference

Output Level (*5)

Relative Value of

DTMF Tones

DfT1

DfT2

VTL

VTH

VRL

VRH

RDTMF

DTMF Tones

–1.5 — +1.5 %

Other various tones

–1.5 — +1.5 %

Transmit side tone DTMF (Low group)

–10 –8 –6 dBm0

(Gain set value:0dB) DTMF (High group), Others –8 –6 –4 dBm0

Recieve side tone DTMF (Low group)

–10 –8 –6 dBm0

(Gain set value:0dB) DTMF (High group), Others –8 –6 –4 dBm0

VTH/VTL, VRH/VRL

1 2 3 dB

*5 Not including programmable gain set values

AC Characteristics (Gain Settings)

Parameter

Transmit/Recieve Gain

Setting Accurancy

Symbol

DG

Condition

For all gain set values

(VDD = 2.7 to 3.6 V, Ta = –25 to +70°C)

Min. Typ. Max. Unit

–1 0 +1 dB

AC Characteristics (VOX Function)

(VDD = 2.7 to 3.6 V, Ta = –25 to +70°C)

Parameter

Symbol

Condition

Min. Typ. Max. Unit

Transmit VOX Detection Time

tVXON

SilenceÆvoice

VOXO pin:see Fig.6

Voice/silence

—

5

— ms

voice signal ON/OFF Detect Time tVXOFF VoiceÆsilence differential:10 dB 140/300 160/320 180/340 ms

Transmit VOX Detection Level

For detection level set values by

Accuracy (Voice Detection Level) DVX CRM6-B6,B5

–2.5 0 +2.5 dB

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