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MV8870EXP

Part Number	MV8870EXP
Manufacturer	Plessey
Description	DTMF RECEIVER
Published	Jul 29, 2020
Detailed Description	MV8870 - PLESSEY . , 5enIiconductors _ _ _ _ _P_ REL_ IMIN_ ARY_INF_ ORM_AT_ION Preliminary Information is Issued to adv...
Datasheet	MV8870EXP PDF File

Overview

MV8870 - PLESSEY .
, 5enIiconductors _ _ _ _ _P_ REL_ IMIN_ ARY_INF_ ORM_AT_ION Preliminary Information is Issued to advise Customers of potential new products which are designated 'Experimental' but are, nevertheless, serious development projects and Is supplied without liability for errors or omissions.
DetailS given may change without notice and no undertaking is given or implied as to current or future availability.
Customers Incorporating 'experimental' product in their equipment designs do so at their own risk.
Please consult your local Plessey Semiconductors sales outlet for details 01 the current status.
MV8870EXP DTMF RECEIVER The MV8870 is a complete DTMF receiver integrating both the bandsplit filter and digital decoder functions, fabricated on Plessey Semiconductors' double-poly IS02-CMOS technology.
The filter section uses switched capacitor techniques for high- and low- group filters and dial-tone rejection; 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.
APPLICATIONS • PABX • Central Office • Key Systems • Mobile Radio • Remote Control • Remote Data Entry DG18 Fig.
1 Pin connections (top view) FEATURES • Full Receiver in Single 18-Pin Package • Central Office Quality • Lower Power Consumption • Adjustable Acquisition and Release Times PDWN VDD Vss VREF SEL , -6- - - -18--9- - - - - - - - 4- - - - -5 - - - - I CHIP CHIP POWER BIAS CHIP REF I I I I I 1101 IN+ 1 IN- 2 GS 3 0 - - - - - - - ' DIGITAL DETECTION ALGORITHM 16 ESI Fig.
2 Functional block diagram CODE CONVERTER AND LATCH 112 02 1 13 03 I 1404 I I I __JI 15 10 SID TOE 145 MV8870 ABSOLUTE MAXIMUM RATINGS (NOTE 1) Parameter Min.
Max.
Unit Power supply voltage Voo - Vss 6 V Voltage on any pin Vss -0.
3 Voo +0.
3 V Current at any pin 10 mA Operating temperature -40 ...

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