TEA7092TQ View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'TEA7092TQ' PDF : 24 Pages View PDF
TEA7092
DTMF GENERATOR (Tamb = 25°C, see Test 3)
Symbol
Amf
Llf
LhF
Pmf
tR
tdiff
Velf
Vehf
Vllf
Vlhf
Parameter
Tone Frequency Accuracy
Low Frequency Group Line Level
Hifh Frequency Group Line Level
Preemphasis HF/LF
Rise Time
Decay Time
Confidence Tone Level :
- Earphone Level (Low Frequency)
- Earphone Level (High Frequency)
- Loudspeaker Level (Low Frequency)
- Loudspeaker Level (High Frequency)
Test Conditions
f = 3.58MHz, IL = 90mA
IL = 20mA & 90mA
IL = 20mA & 90mA
IL = 20mA & 90mA
IL = 20mA & 90mA
IL = 20mA & 90mA
IL = 20mA & 90mA
Code Level (0100111)
Unwanted frequencies comply with CEPT 46-03.
Min.
-0.4
-9.5
-7.5
1
-35
-33
-10
-8
Typ.
-8
-6
2
Max.
0.4
-6.5
-4.5
3
5
5
Unit
%
dBm
dBm
dB
ms
ms
-32
-29 dBm
-30
-27 dBm
-7
-4
dBm
-5
-2
dBm
SINE WAVE GENERATOR ( Tamb = 25°C, IL = 20 & 90mA, see Test 3)
The sine wave generator uses the same path than the DTMF generator. Sinus wave frequencies are the
half of the DTMF frequencies.
Symbol
Parameter
Sfl Line Level
Test Conditions
Low Frequency Group 348 / 385 / 426 / 470Hz
Min.
-18
Typ.
-14
Max.
-10
Unit
dBm
Sfh Line Level
High Frequency Group 604 / 668 / 738 / 816 Hz -16
-12
-8
dBm
ERROR BEEP GENERATOR
The frequencies of the error beep generator are given by : FEB = Fni.
Fi can take one the following values : 19455Hz, 21308Hz, 23551Hz or 26321Hz, and n varies between 1
and 63.
Error beep generator code generates square wave signal in the earphone.
Error beep generator code following by group listening code generate square wave signal in the earphone
and in the loudspeaker.
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