75T2089 View Datasheet(PDF) - TDK Corporation
Part Name
Description
Manufacturer
75T2089 Datasheet PDF : 9 Pages
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75T2089/2090/2091
DTMF Transceivers
DIGITAL AND DC REQUIREMENTS
The following electrical specifications apply to the digital input and output signals over the recommended
operating range unless otherwise noted. The specifications do not apply to the following pins: LIN, DIN, XIN,
XOUT, and DTMF OUT. Positive current is defined as entering the circuit. Vn = 0 unless otherwise stated.
PARAMETER
Supply Current*
Power Dissipation
Input Voltage High
Input Voltage Low
Input Current High
Input Current Low
Output Voltage High
Output Voltage Low
* with DTMF output disabled
CONDITIONS
Ioh = -0.2mA
IoI = +0.4mA
MIN
0.7Vp
-10
Vp-0.5
NOM
15
MAX
30
225
0.3Vp
10
Vn+0.5
UNIT
mA
mW
V
V
µA
µA
V
V
DTMF RECEIVER: Electrical Characteristics
PARAMETER
CONDITIONS
Frequency Detect Bandwidth
Amplitude for Detection
Each Tone
Twist Tolerance
60Hz Tolerance
Dial Tone Tolerance
Precise Dial Tone
Speech Immunity
MITEL Tape #CM7290
Noise Tolerance
MITEL Tape #CM7290
Input Impedance
* Referenced to lowest amplitude tone
MIN
=(1.5+2Hz)
-32
-10
NOM
=2.3
2
100
MAX
=3.5
-2
+10
0.8
0
-12
UNIT
%Fo
dBm/tone
dB
Vrms
dB*
hits
dB*
kΩ
DTMF RECEIVER: Timing Characteristics
PARAMETER
TON Tone Time for Detect
TON Tone Time for No Detect
TOFF Pause Time for Redetection
TOFF Pause Time for Bridging
TD1 Detect Time
TR1 Release Time
CONDITIONS
MIN NOM MAX
40
20
40
20
25
46
35
50
UNIT
ms
ms
ms
ms
ms
ms
5
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