SM8223B - NIPPON PRECISION CIRCUITS INC. FSK Decoder and DTMF Receiver IC

Nippon Precision Circuits Inc

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Datasheet Details

Part number	SM8223B
Manufacturer	Nippon Precision Circuits Inc
File Size	133.12 KB
Description	NIPPON PRECISION CIRCUITS INC. FSK Decoder and DTMF Receiver IC
Datasheet	SM8223B-NipponPrecisionCircuitsInc.pdf

SM8223B Product details

Description

Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Name TIP RING GS AGND RDIN RDRC RDET PDW N GND OSCOUT OSCIN IC FSK/DTMF DOUT DV VDD I/O Function I Tip input.Connected to the telephone line through a protection circuit I Ring input.Connected to the telephone line through a protection circuit O Input-stage ampliﬁer gain-select output.Used to adjust the gain of the input-stage ampliﬁer.O Analog ground output.Internal reference voltage (VD D /2) output level I Ring detector input.Used f

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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Published: Feb 20, 2015 |