MSM7719-01 Datasheet, PDF (19/40 Pages) OKI electronic componets – Echo Canceler with ADPCM Transcoder

¡ Semiconductor
MSM7719-01
AC Characteristics (Gain Settings)
Parameter
Transmit/Receive Gain
Setting Accuracy
Symbol
D_G
Condition
For all gain set values
(V_DD = 4.5 to 5.5 V, Ta = –25 to +70°C)
Min. Typ. Max. Unit
–1 0 +1 dB
AC Characteristics (VOX Function)
(V_DD = 4.5 to 5.5 V, Ta = –25 to +70°C)
Parameter
Symbol
Condition
Min. Typ. Max. Unit
Transmit VOX Detection Time
t_VXON
SilenceÆvoice ^{VOXO pin:see Fig.6}
Voice/silence
—
5
— ms
(Voice Signal ON/OFF Detect Time) t_VXOFF 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 CR6-B6,B5
–2.5 0 +2.5 dB
AC Characteristics (DTMF and Other Tones)
(V_DD = 2.7 to 3.6 V, Ta = –25 to +70°C)
Parameter
Symbol
Condition
Min. Typ. Max. Unit
Frequency Deviation
Df_T1
Df_T2
DTMF Tones
Other various tones
–1.5 — +1.5 %
–1.5 — +1.5 %
Tone Reference
Output Level ^(*1)
V_TL
Transmit side tone DTMF (Low group)
–10 –8 –6 dBm0
V_TH
(Gain set value:0dB) DTMF (High group), Others –8 –6 –4 dBm0
V_RL
Receive side tone DTMF (Low group)
–10 –8 –6 dBm0
V_RH
(Gain set value:0dB) DTMF (High group), Others –8 –6 –4 dBm0
Relative Value of
DTMF Tones
R_DTMF
V_TH/V_TL, V_RH/V_RL
1 2 3 dB
*1 Not including programmable gain set values
19/40