MSM7715GS-2K 데이터 시트보기 (PDF) - Oki Electric Industry
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MSM7715GS-2K Datasheet PDF : 21 Pages
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¡ Semiconductor
MSM7715
AC Characteristics (DTMF)
(VDD = 2.5 V to 3.6 V, Ta = –40°C to +85°C)
Parameter
Symbol
Condition
Min. Typ. Max. Unit
Transmit Level
VDTTL
VDTTH
AOUT, R1 = R3
Low-group tone
High-group tone
–16.5 –14.5 –12.5 dBm
–15.5 –13.5 –11.5 *1
Transmit Signal Level
Relative Value
VDTDF High-group tone/low-group tone
0
1
2 dB
Transmit Frequency
Deviation
fDDT With respect to the nominal frequency
–1.5 — +1.5 %
Transmit Signal
Distortion Rate
THDDT Harmonics/Fundamental frequency
— — –23 dB
DTG1 to DTG4 Input Data
Setup Time
tSDT
DTG1 to DTG4 Input Data
Hold Time
tHDT
Receive Detect Level
Receive Reject Level
VDETDT
VREJDT
Receive Frequency
Detect Band
fDETDT
Receive Frequency
Reject Band
fREJDT
See Fig. 2.
See Fig. 2.
For each single tone
For each single tone
With respect to the nominal frequency
With respect to the nominal frequency
250 —
250 —
—
ns
—
–46 — –10 dBm
— — –60 *1
— — ±1.5
%
±3.8 — —
Allowable Receive Level
Difference
VTWIST High-group tone/low-group tone
Allowable Receive
Noise Level ratio
VN/S
Dial Tone Reject Ratio VREJ400
Signal Repetition Time
tC1
tC2
Tone Time for Detect
tS1
tS2
Tone Time for No Detect
tI1
tI2
tG11
Output Delay Time
tG12
tG21
tG22
Interdigit Pause Time
tP1
tP2
Acceptable Drop Out Time tB1
tB2
SP Delay Time
tSP1
tSP2
Output Trailing Edge
tD1
Delay Time
tD2
Noise (0.3 kHz to 3.4 kHz)
level/tone level
380 Hz to 420 Hz
DTTIM = "1"
DTTIM = "0"
See Fig. 1
DTTIM = "1"
DTTIM = "0"
DTTIM = "1"
DTTIM = "0"
Normal
DTTIM = "1"
condition *2 DTTIM = "0"
Just after
DTTIM = "1"
mode change *3 DTTIM = "0"
DTTIM = "1"
DTTIM = "0"
DTTIM = "1"
DTTIM = "0"
DTTIM = "1"
DTTIM = "0"
tS > 80 ms
tS > 44 ms
DTTIM = "1"
DTTIM = "0"
–6 — +6
dB
— –12 —
37 —
120 —
70 —
49 —
34 —
——
——
30 45
20 32
30 48
20 35
30 —
21 —
——
——
6
8
1
1.7
21 29
15 21
—
—
—
—
—
24
9
57
ms
42
77
62
—
—
10
3
10
3
35
27
7/21
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