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SM8223A - FSK Decoder and DTMF Receiver

Description

Number 1 2 3 4 5 6 7 Name TIP RING GS AG N D RDIN RDRC RDET I/O I I O O I I/O O Function Tip input.

Connected to the telephone line through a protection circuit Ring input.

Connected to the telephone line through a protection circuit Input-stage amplifier gain-select output.

Features

  • a power-down function for low power dissipation operation. The FSK decoder and DTMF receiver have the same performance characteristics as dedicated ICs that perform the same functions, with the added benefit of an FSK decoder/DTMF receiver auto-select function1 using the telephone tip/ring input signal. It also features a ring (call signal) signal detection circuit, making for easy construction of low power dissipation, high-performance analog telephone-related.

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Datasheet preview – SM8223A

Datasheet Details

Part number SM8223A
Manufacturer Nippon Precision Circuits Inc
File Size 172.67 KB
Description FSK Decoder and DTMF Receiver
Datasheet download datasheet SM8223A Datasheet
Additional preview pages of the SM8223A datasheet.

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Full PDF Text Transcription

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SM8223A NIPPON PRECISION CIRCUITS INC. FSK Decoder and DTMF Receiver IC OVERVIEW The SM8223A is a FSK (Frequency shift keying) decoder and DTMF (Dual tone multi-frequency) receiver IC. It is fabricated using a CMOS process and features a power-down function for low power dissipation operation. The FSK decoder and DTMF receiver have the same performance characteristics as dedicated ICs that perform the same functions, with the added benefit of an FSK decoder/DTMF receiver auto-select function1 using the telephone tip/ring input signal. It also features a ring (call signal) signal detection circuit, making for easy construction of low power dissipation, high-performance analog telephone-related applications.
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