MT8870 DTMF Decoder IC – Dual-Tone Multi-Frequency Receiver Chip

Description

• Complete DTMF Receiver
• Low power consumption
• Internal gain setting amplifier
• Adjustable guard time
• Central office quality
• Power-down mode
• Inhibit mode
• Backward compatible with MT8870C/MT8870C-1

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The MT8870 is a complete DTMF receiver integrating both the band split filter and digital decoder functions. The filter section uses switched capacitor techniques for high and low group filters; the decoder uses digital counting techniques to detect and decode all 16 DTMF tone-pairs into a 4-bit code.

Features:-

• Complete DTMF Receiver 

• Low power consumption 

• Internal gain setting amplifier 

• Adjustable guard time 

• Central office quality 

• Power-down mode 

• Inhibit mode 

• Backward compatible with MT8870C/MT8870C-1

Specification:-

Symbol	Parameter	Min	Max	Units
VDD	DC Power Supply Voltage		7	V
VI	Voltage on any pin	VSS-0.3	VDD+0.3	V
II	Current at any pin (other than supply)		10	m A
TSTG	Storage temperature	-65	150	°C
PD	Package power dissipation		500	m W

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