75T202 5V Low Power DTMF Receiver

TDK

Description

.
w The 75T202 and 75T203 are complete Dual-tone Multifrequency (DTMF) receivers detecting a selectable group of 12 or 16 standard digits.

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Datasheet Specifications

Part number: 75T202
Manufacturer: TDK
File Size: 72.93 KB
Datasheet: 75T202_TDK.pdf
Description: 5V Low Power DTMF Receiver

Features

* Central office quality NO front-end band-splitting filters required Single, low-tolerance, 5-volt supply Detects either 12 or 16 standard DTMF digits Uses inexpensive 3.579545 MHz crystal fo

Applications

* and is not normally used in telephone dialing. Col 0 Row 0 1 Col 1 2 Col 2 3 Col 3 A Row 1 4 5 6 B Row 2 7 8 9 C Row 3
* 0 # D FIGURE 3: DTMF Dialing Matrix DETECTION FREQUENCY Low Group f0 Row 0 = 697 Hz Row 1 = 770 Hz Row 2 = 852 Hz Row 3 = 941 Hz High Group f0 Column 0 = 1209

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75T202 Low Power DTMF Receiver TDK

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