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MV8870

GEC Plessey Semiconductors
Part Number MV8870
Manufacturer GEC Plessey Semiconductors
Description Integrated DTMF Receiver
Published Sep 4, 2006
Detailed Description www.DataSheet4U.com THIS DOCUMENT IS FOR MAINTENANCE PURPOSES ONLY AND IS NOT RECOMMENDED FOR NEW DESIGNS DataSheet4U.c...
Datasheet PDF File MV8870 PDF File

MV8870
MV8870

Overview
www.
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com MV8870/MV8870-1 ADVANCE INFORMATION DS3140-2.
1 MV8870 / MV8870-1 INTEGRATED DTMF RECEIVER The MV8870 / MV8870-1 is a complete DTMF receiver integrating both the bandsplit filter and digital decoder functions, fabricated in GPS’s double-poly ISO2-CMOS technology.
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 minimised by on-chip provision of a differential input amplifier, clock oscillator and latched 3-state bus interface.
The MV8870 and MV8870-1 are functionally identical, but differ in Electrical Characteristics.
IN+ INGS VREF SEL PD OSC1 OSC2 VSS 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 VDD St/GT ESt StD Q4 Q3 Q2 Q1 TOE DG18 DP18 MP18 27 St/GT 28 VDD s s s s s Complete DTMF Receiver Low Power Consumption Internal Gain Setting Amplifier Adjustable Guard Time Central Office Quality 26 ESt 25 StD 24 NC 23 NC 22 FLT 21 FL 20 Q4 19 Q3 VREF 5 NC 6 SEL 7 FHT 8 FH 9 et4U.
com APPLICATIONS s s s s s DataSheet4U.
com 1 IN+ FEATURES 3 GS 4 NC 2 IN- PD 10 NC 11 OSC1 12 OSC2 13 VSS 14 NC 15 TOE 16 Q1 17 Q2 18 Receiver Systems for BT or CEPT Specifications Paging Sytems Repeater Systems / Mobile Radio Credit Card Systems Remote Control DataShee HP28 Figure 1: Pin connections - top view SEL 5(7) PD FHT (8) FH (9) 11(17) Q1 6(10) HIGH GROUP FILTER IN+ INGS 1(1) 2(2) 3(3) 12(18) ZERO CROSSING DETECTORS DIAL TONE FILTER DIGITAL DETECTION ALGORITHM CODE CONVERTER AND LATCH Q2 13(19) Q3 LOW GROUP FILTER CHIP CHIP POWER BIAS 14(20) Q4 10(16) CHIP CLOCKS 4(5) VREF (22) 7(12) OSC1 8(13) OSC2 (21) FL TOE BIAS CIRCUIT 18(28) 9(14) VSS STEERING LOGIC 16(26) ESt 15(25) StD 17(27) St/GT ...


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