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TEA7089AFP Datasheet(PDF) 7 Page - STMicroelectronics

No. de pieza TEA7089AFP
Descripción Electrónicos  LOW-RANGE PHONE DEDICATED CHIP
PDF  17 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TEA7089AFP Datasheet(HTML) 7 Page - STMicroelectronics

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ELECTRICAL SPECIFICATIONS (continued)
DTMF Generator (Tamb =25
°C; RL = 660Ω)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
Amf
Tone Frequency Accuracy
Test 6 Pin Osc
fclock = 1.79MHz oscillator off
or
Resonator : 3.58MHz oscillator on
C13 =100nF, IL = 22mA
- 0.4
0.4
%
Llf
Lhf
Low Freq. Group Line Level
High Freq. Group Line Level
-10
-8
-8.5
-6.5
-7
-5
dBm
dBm
Pmf
Preemphasis HF/LF
+1
+2
+3
dB
tDON
tDOFF
Rise Time
Decay Time
5
5
ms
ms
Cmf
DTMF Confidence Tone :
Earphone level (low freq.)
Earphone level (high freq.)
13
17
17
22
21
27
mV
mV
–
- Unwanted Harmonics Level
(see Figure 6)
––––
100
1k
10k
100k
1M
-90
-70
-50
-30
(Hz)
Figure 6 : Unwanted Harmonics Level in DTMF
V
REF I
I
S tart-u p
I
S pe ech
V
L
I (In Ring)
18
V
RING
26
V
RMC (3 .4 V)
13
C15
10 F
P
+LCD
C10
47 F
5.6 V
V
MC
Ba tte ry
kIL
Figure 7 : Microcontroller Interface
TEA7089A
7/17



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