75t204 ETC-unknow, 75t204 Datasheet - Page 5

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75t204

Manufacturer Part Number
75t204
Description
Low-power Subscriber Dtmf Receiver
Manufacturer
ETC-unknow
Datasheet

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DETECTION FREQUENCY
Low Group f
Row 0 = 697 Hz
Row 1 = 770 Hz
Row 2 = 852 Hz
Row 3 = 941 Hz
75T204 TIMING (Refer to Figure 4.)
PARAMETER
t
t
t
t
t
t
ON
OFF
D
R
SU
H
Tone Time
Pause Time
Detect Time
Release Time
Data Setup Time
Data Hold Time
Output Enable Time
Output Disable Time
Output Rise Time
Output Fall Time
0
CONDITIONS
for detection
for rejection
for detection
for rejection
C
C
C
C
L
L
L
L
= 50pF, R
= 35pF, R
= 50pF
= 50pF
L
L
= 1k½
= 500½
5
High Group f
Column 0 = 1209 Hz
Column 1 = 1336 Hz
Column 2 = 1477 Hz
Column 3 = 1633 Hz
5V Low-Power Subscriber
0
MIN
4.2
40
40
25
35
7
-
-
-
-
-
-
NOM
DTMF Receiver
-
-
-
-
-
-
-
-
-
-
-
-
MAX
200
200
200
200
5.0
20
20
46
50
-
-
-
75T204
UNITS
ms
ms
ms
ms
ms
ms
ms
µs
ns
ns
ns
ns

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