MV8870 반도체 회로 부품 판매점
Integrated DTMF Receiver
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 GEC Plessey Semiconductors |
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THIS DOCUMENT IS FOR MAINTENANCE
PURPOSES ONLY AND IS NOT
RECOMMENDED FOR NEW DESIGNS
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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.
FEATURES
s Complete DTMF Receiver
s Low Power Consumption
s Internal Gain Setting Amplifier
s Adjustable Guard Time
s Central Office Quality
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s Receiver Systems for BT or CEPT Specifications
s Paging Sytems
s Repeater Systems / Mobile Radio
s Credit Card Systems
s Remote Control
IN+
IN-
GS
VREF
SEL
PD
OSC1
OSC2
VSS
1
2
3
4
5
6
7
8
9
18 VDD
17 St/GT
16 ESt
15 StD
14 Q4
13 Q3
12 Q2
11 Q1 DG18
10 TOE DP18
MP18
VREF 5
NC 6
SEL 7
FHT 8
FH 9
PD 10
NC 11
25 StD
24 NC
23 NC
22 FLT
21 FL
20 Q4
19 Q3
HP28
Figure 1: Pin connections - top view
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SEL PD
5(7) 6(10)
1(1)
IN+
2(2)
IN-
3(3)
GS
CHIP CHIP
POWER BIAS
FHT
(8)
HIGH GROUP FILTER
FH
(9)
DIAL TONE FILTER
ZERO
CROSSING
DETECTORS
LOW GROUP FILTER
DIGITAL
DETECTION
ALGORITHM
CODE
CONVERTER
AND LATCH
BIAS CIRCUIT
CHIP
CLOCKS
STEERING LOGIC
11(17)
Q1
12(18)
Q2
13(19)
Q3
14(20)
Q4
10(16)
TOE
18(28) 9(14)
VDD VSS
4(5)
VREF
(22) 7(12) 8(13)
FLT OSC1 OSC2
(21)
FL
16(26)
ESt
15(25)
StD
17(27)
St/GT
Figure 2: Functional block diagram (Pin numbers in brackets refer to HP package)
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제조업체: GEC Plessey Semiconductors
( gps )
MV8870 receiver
데이터시트 다운로드 :
[ MV8870.PDF ]
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국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
[ 홈페이지 ]
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관련 데이터시트
MV8870
Integrated DTMF Receiver - GEC Plessey Semiconductors
MV8870-1
Integrated DTMF Receiver - GEC Plessey Semiconductors