參數資料
型號: MB89PV890
廠商: Fujitsu Limited
英文描述: 8-Bit Proprietary Microcontroller(8位專用微控制器)
中文描述: 8位微控制器專利(8位專用微控制器)
文件頁數: 36/51頁
文件大?。?/td> 722K
代理商: MB89PV890
36
MB89890 Series
(8) Electrical Characteristics of DTMF Generator
(AV
SS
= V
SS
= 0.0 V, T
A
= –20
°
C to +85
°
C)
Value
Unit
Typ.
Max.
Parameter
Symbol
Condition
Remarks
Min.
Operating voltage range
2.5
5.0
6.0
V
Output load requirements
R
O
V
CC
= 2.5 V to 6.0 V
20
k
Defined when
the DTMF pin
is connected
to a pull-down
resistor.
DTMF output offset voltage
(at signal output)
V
MOF
V
CC
= 5.0 V
0.4
V
When the
DTMF pin is
open.
R
O
= 200 k
DTMF output amplitude
(ROW single tone)
V
MFOR
V
CC
= 5.0 V
–16.3
–14.0
–12.5
dBm
Difference between
COLUMN and ROW levels
R
MF
1.6
2.0
2.4
dB
Distortion ratio
7
%
Output Level Measurement Circuit
V
CC
V
SS
X0
X1
0.1
μ
F
8 MHz
Lowpass filter
16.0 kHz
Audio analizer
Output level
R
O
–48 dB/oct
DTMF
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