Microchip MT8870DSR1

DTMF 接收器4.75V ~ 5.25V

Overview

The MT8870D/MT8870D-1 is a complete DTMF receiver integrating both the bandsplit 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. External component count is minimized by on chip provision of a differential input amplifier, clock oscillator and latched three-state bus interface.

Features

Tape & Reel (TR) Package
Available in the 18-SOIC (0.295, 7.50mm Width) package
DTMF SIGNALING CIRCUIT as telecom IC type
Operating supply voltage of 5V
Operating supply current of 3mA
Operating with the requency of 3.58MHz

Surface Mount Mounting Type

Applications

There are a lot of Microchip Technology
MT8870DSR1 Telecom applications.

• Add/Drop multiplexers (ADMs)
• T1/E1/J1 add/drop multiplexers (MUX)
• Channel Service Units (CSUs): T1/E1/J1
• Fractional T1/E1/J1
• BITS Timing
• Digital Access Cross-connect System (DACs)
• Digital Cross-connect Systems (DCS)
• Frame Relay Switches and Access Devices (FRADS)
• ISDN Primary Rate Interfaces (PRA)
• PBXs channel bank