MT8870DN-1 datasheet(6/12 Pages) MITEL

Part #	MT8870DN-1

Description	ISO2-CMOS Integrated DTMF Receiver

Download	12 Pages

Scroll/Zoom	100%

Manufacturer	MITEL [Mitel Networks Corporation]

Direct Link	http://www.mitel.com

Logo

6 / 12 page

MT8870D/MT8870D-1 ISO2-CMOS

4-16

Applications

RECEIVER SYSTEM FOR BRITISH TELECOM

SPEC POR 1151

The circuit shown in Fig. 9 illustrates the use of

MT8870D-1 device in a typical receiver system. BT

Spec defines the input signals less than -34 dBm as

the non-operate level.

This condition can be

attained by choosing a suitable values of R1 and R2

to provide 3 dB attenuation, such that -34 dBm input

signal will correspond to -37 dBm at the gain setting

pin GS of MT8870D-1. As shown in the diagram, the

component values of R3 and C2 are the guard time

requirements when the total component tolerance is

6%. For better performance, it is recommended to

use the non-symmetric guard time circuit in Fig. 8.

Figure 8 - Non-Symmetric Guard Time Circuit

tGTP=(RPC1)In[VDD/(VDD-VTSt)]

tGTA=(R1C1)In(VDD/VTSt)

RP=(R1R2)/(R1+R2)

VDD

St/GT

ESt

C1

R2

R1

Notes:

R1=368K Ω ± 1%

R2=2.2M Ω ± 1%

C1=100nF ± 5%

Figure 9 - Single-Ended Input Configuration for BT or CEPT Spec

IN+

IN-

GS

VRef

INH

PWDN

OSC 1

OSC 2

VSS

TOE

VDD

St/GT

ESt

StD

Q4

Q3

Q2

Q1

DTMF

Input

C1

R1

R2

X1

VDD

C2

R3

MT8870D-1

NOTES:

R1 = 102KΩ ± 1%

R2 = 71.5KΩ ± 1%

R3 = 390KΩ ±1 %

C1,C2 = 100 nF ± 5%

X1 = 3.579545 MHz ± 0.1%

VDD = 5.0V ± 5%

Similar Part No. - MT8870DN-1

Manufacturer	Part #	Datasheet	Description
List of Unclassifed Man...	MT8872C	247Kb / 2P	COFDM DEMODULATOR/FEC
List of Unclassifed Man...	MT8872P	247Kb / 2P	COFDM DEMODULATOR/FEC

More results

Similar Description - MT8870DN-1

Manufacturer	Part #	Datasheet	Description
California Micro Device...	CM8870	231Kb / 8P	CMOS Integrated DTMF Receiver
List of Unclassifed Man...	SSI75T201	108Kb / 8P	INTEGRATED DTMF RECEIVER
UMC Corporation	UM92870	486Kb / 1P	INTEGRATED DTMF RECEIVER
California Micro Device...	CM88L70	472Kb / 8P	CMOS INTEGRATED DTMF RECEIVER, 3 VOLT VERSION
Mitel Networks Corporat...	MT8880C	312Kb / 18P	ISO2-CMOS Integrated DTMFTransceiver
Mitel Networks Corporat...	MT88L70	115Kb / 10P	3 Volt Integrated DTMF Receiver
California Micro Device...	CM8880	745Kb / 16P	CMOS Integrated DTMF Transceiver
California Micro Device...	CM8888	322Kb / 13P	CMOS INTEGRATED DTMF TRANCEIVER
Zarlink Semiconductor I...	MT88L70	474Kb / 16P	3 Volt Integrated DTMF Receiver
Mitel Networks Corporat...	MT8960	324Kb / 22P	ISO2-CMOS Integrated PCM Filter Codec

More results

MT8870DN-1 Datasheet(PDF) 6 Page - Mitel Networks Corporation

MT8870DN-1 Datasheet(HTML) 6 Page - Mitel Networks Corporation

Similar Part No. - MT8870DN-1

Similar Description - MT8870DN-1

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12

Datasheet Download

Link URL