California Micro Devices CM8870PE, CM8870P, CM8870FI, CM8870F, CM8870CSI Datasheet
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CALIFORNIA MICRO DEVICES
CMOS Integrated DTMF Receiver
CM8870/70C
Features
• Full DTMF receiver
• Less than 35mW power consumption
• Industrial temperature range
• Uses quartz crystal or ceramic resonators
• Adjustable acquisition and release times
• 18-pin DIP, 18-pin DIP EIAJ, 18-pin SOIC, 20-pin
PLCC
• CM8870C
— Power down mode
— Inhibit mode
— Buffered OSC3 output (PLCC package only)
• CM8870C is fully compatible with CM8870 for 18-pin
devices by grounding pins 5 and 6
Applications
• PABX
• Central office
• Mobile radio
• Remote control
• Remote data entry
• Call limiting
• Telephone answering systems
• Paging systems
Product Description
The CAMD CM8870/70C provides full DTMF receiver capability by integrating both the bandsplit filter and digital
decoder functions into a single 18-pin DIP, SOIC, or 20-pin PLCC package. The CM8870/70C is manufactured using
state-of-the-art CMOS process technology for low power consumption (35mW, max.) and precise data handling. The
filter section uses a switched capacitor technique for both high and low group filters and dial tone rejection. The
CM8870/70C decoder uses digital counting techniques for the detection and decoding of all 16 DTMF tone pairs into a
4-bit code. This DTMF receiver minimizes external component count by providing an on-chip differential input amplifier, clock generator, and a latched three-state interface bus. The on-chip clock generator requires only a low cost TV
crystal or ceramic resonator as an external component.
© 2000 California Micro Devices Corp. All rights reserved.
9/28/2000
215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com
+##'
1
CALIFORNIA MICRO DEVICES
CM8870/70C
Absolute Maximum Ratings: (Note 1)
retemaraPlobmySeulaV
-
V(egatloVylppuSrewoP
)
V
SS
DD
V
DD
niPynanoegatloVcdVV
niPynanotnerruCI
erutarepmeTgnitarepOT
erutarepmeTegarotST
DD
A
S
SGNITARMUMIXAMETULOSBA
xaMV0.6
SS
VotV3.0-
V3.0+
DD
xaMAm01
C°58+otC°04-
C°051+otC°56-
This device contains input protection
against damage due to high static
voltages or electric fields; however,
precautions should be taken to avoid
application of voltages higher than the
maximum rating.
Notes:
1. Exceeding these ratings may cause
permanent damage, functional
operation under these conditions is
not implied.
DC Characteristics: All voltages referenced to VSS, VDD = 5.0V ± 5%, TA = -40°C to +85°C unless otherwise noted.
SCITSIRETCARAHCCD
retemaraPlobmySniMpyTxaMstinUsnoitidnoCtseT
egatloVylppuSgnitarepOV
tnerruCylppuSgnitarepOI
tnerruCylppuSybdnatSI
noitpmusnoCrewoPP
egatloVtupnIleveLwoLV
egatloVtupnIleveLhgiHV
tnerruCegakaeLtupnII
EOTnotnerruC)ecruoS(pUlluPI
)-NI,+NI(,ecnadepmItupnIR
egatloVdlohserhTgnireetSV
egatloVtuptuOleveLwoLV
egatloVtuptuOleveLhgiHV
tnerruC)kniS(woLtuptuOI
tnerruC)ecruoS(hgiHtuptuOI
egatloVtuptuO
ecnatsiseRtuptuOR
V
FER
HIL/LI
V
DD
DD
QDD
O
LI
HI
os
NI
tsT
LO
HO
LO
HO
FER
RO
57.452.5V
0.30.7Am
52
µA
5153WmV;zHM975.3=f
V=DP
DD
DD
5.1V VDDV0.5=
5.3VV
1.0
5.602
µA
µA
VNIV=
SS
V0.5=
DD
V=
DD
V,V0=EOT
DD
801MΩ zHK1@
2.25.2V VDDV0.5=
30.0V V
79.4VV
0.15.2AmV
4.08.0AmV
4.27.2V V
01
ΩΚ
DD
DD
V4.0=
TUO
V6.4=
TUO
DD
V0.5=
)1etoN(
V0.5=
daoLoN,V0.5=
daoLoN,V0.5=
daoLoN,V0.5=
Operating Characteristics: All voltages referenced to VSS, VDD = 5.0V ± 5%, TA = -40°C to +85°C unless otherwise noted.
Gain Setting Amplifier
SCITSIRETCARAHCGNITAREPO
retemaraPlobmySniMpyTxaMstinUsnoitidnoCtseT
tnerruCegakaeLtupnII
ecnatsiseRtupnIR
egatloVtesffOtupnIV
noitcejeRylppuSrewoPRRSP05Bd)21etoN(zHK1
noitcejeRedoMnommoCRRMC04BdIV<V0.3-
niaGegatloVpooLnepOCDA
gniwSegatloVtuptuOV
)SG(daoLeviticapaCmumixaMCL001Fp
)SG(daoLevitsiseRmumixaMR
©2000 California Micro Devices Corp. All rights reserved.
2
215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com
NI
NI
SO
LOV
01MΩ
23Bd
001±AnV
52±Vm
htdiwdnaBniaGytinUpooLnepOcf3.0zHM
O
L
)daoLoN(egnaRedoMnommoCmcV5.2V
0.4V
P-P
05KΩ
P-P
RL≥ VotWK001
V<
SS
NI
N
daoLoN
V<
DD
V0.3<
SS
9/28/2000
CALIFORNIA MICRO DEVICES
CM8870/70C
AC Characteristics: All voltages referenced to VSS, VDD=5.0V ±5%, TA=-40°C to +85°C, f
test circuit (Fig. 1) unless otherwise noted.
SCITSIRETCARAHCCA
retemaraPlobmySniMpyTxaMstinUsetoN
sleveLlangiStupnIdilaV
)langisetisopmocfoenothcae(
tpeccAtsiwTevitisoP 01Bd
tpeccAtsiwTevitageN 01Bd
timiLtpeccAnoitaiveD.qerF zH2±%5.1.moN01,8,5,3,2
timiLtcejeRnoitaiveD.qerF%5.3±.moN5,3,2
ecnareloTenoTdrihT 61-Bd41,31,9,8,5,4,3,2
ecnareloTesioN21-Bd9,8,6,5,4,3,2
ecnareloTenoTlaiD 22+Bd9,8,7,5,4,3,2
emiTnoitceteDtneserPenoTt
emiTnoitceteDtnesbAenoTt
tpeccAnoitaruDenoTniMt
tcejeRnoitaruDenoTxaMt
tpeccAesuaPtigidretnI.niMt
tcejeResuaPtigidretnI.xaMt
)QottS(yaleDnoitagaporPt
)DtSottS(yaleDnoitagaporPt
)DtSotQ(pUteSataDtuptuOt
elbanEt
)QotEOT(yaleDnoitagaporP
elbasiDt
ycneuqerFkcolC/latsyrCf
PD
AD
CER
CER
DI
OD
QP
SPtD
SQtD
ETP
DTP
KLC
)2CSO(tuptuOkcolCeviticapaC
daoL
C
OL
92-1+mBd
5.72968Vm
58 41Sm
5.03 5.8Sm
04Sm
02Sm
04Sm
02
611
961
4.3
05Sn
003Sn
9575.35975.31385.3zHM
03Fp
=3.579545 MHz using
CLK
SMR
µS
µS
µS
µS
R
L
C
L
V=EOT
8,5,4,3,2,1
8,4,3,2
otrefeR
margaiDgnimiT
)elbatsujdAresU(
eranwohssemiT
htiwdeniatbo
)1.giFnitiucric
DD
K01= Ω
Fp05=
Notes:
1. dBm = decibels above or below a reference power
2. Digit sequence consists of all 16 DTMF tones.
3. Tone duration = 40mS. Tone pause = 40 mS.
4. Nominal DTMF frequencies are used.
5. Both tones in the composite signal have
6. Bandwidth limited (0 to 3 KHz) Gaussian Noise.
7. The precise dial tone frequencies are
8. For an error rate of better than 1 in 10,000
© 2000 California Micro Devices Corp. All rights reserved.
9/28/2000
of 1 mW into a 600 ohm load.
an equal amplitude.
(350 Hz and 440 Hz) ±2%.
215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com
9. Referenced to lowest level frequency component
10. Minimum signal acceptance level is measured with
11. Input pins defined as IN+, IN-, and TOE.
12. External voltage source used to bias V
13. This parameter also applies to a third tone injected onto
14. Referenced to Figure 1. Input DTMF tone level
in DTMF signal.
specified maximum frequency deviation.
the power supply.
at -28 dBm.
REF
.
3
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