MS8870 Datasheet, PDF (1/8 Pages) List of Unclassifed Manufacturers – DTMF Receiver

MOSA ELECTRONICS
MS8870
DTMF Receiver
Features
• Complete DTMF receiver
• Low power consumption
• Adjustable guard time
• Central Office Quality
• CMOS, Single 5V operation
Description
O
rdering Information
MS8870 : 18 PIN DIP PACKAGE
The MS8870 is a complete DTMF receiver integrating
both the bandsplit filter and digital decoder functions,
fabricated in double poly technology and is pin and
function compatible with MITEL8870. 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 3-state bus interface.
Figure 1. Functional Block Diagram
－1－