參數(shù)資料
型號(hào): MSM7524
廠商: OKI SEMICONDUCTOR CO., LTD.
英文描述: DTMF Transceiver(雙音多頻收發(fā)器)
中文描述: 雙音多頻收發(fā)器(雙音多頻收發(fā)器)
文件頁(yè)數(shù): 13/21頁(yè)
文件大?。?/td> 140K
代理商: MSM7524
Semiconductor
MSM7524
13/21
DTMF Receiver
Figure 6 DTMF Receiver Timing
PBI
D4 to D1
t
REJDT
t
DETDT
t
DELDT
t
HOLDT
t
PAUDT
t
CYCDT
SP
t
BRKDT
(V
DD
= +5 V ±10%, Ta = –25°C to 85°C)
Typ.
Min.
–40
±3.8
–6.0
–12
22
120
Unit
dBm
dBm
%
%
dB
dB
dB
Max.
0
–60
±1.5
+6.0
Condition
f
IN
: Nominal
Symbol
V
DETDT
V
REJDT
f
DETDT
f
REJDT
V
TWIST
V
N/S
V
REJ
t
CYCDT
Parameter
Detect Amplitude
Non-detect Amplitude
Detect Frequency
Non-detect Frequency
Level Twist
Noise to Signal Ratio (N/S)
Dial Tone Rejection Ratio
Signal Repetition Time
Frequency ±1.5%, at GS1
Time to Detect
Time to Reject
Interdigit Pause
Acceptable Drop Out
Detect Delay Time
Detect Hold Time
24
2
49
35
41
28
49
30
24
21
t
DETDT
t
REJFDT
t
PAUDT
t
BRKDT
t
DELDT
t
HOLDT
Detect
Non-detect
ms
Refer to Fig. 6.
To Nominal Frequency
V
High Group–
V
Low Group
N : 0.3 to 3.4 kHz
350 to 480 Hz
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