MT8841AE Ver la hoja de datos (PDF) - Mitel Networks

Número de pieza

componentes Descripción

Fabricante

MT8841AE

CMOS Calling Number Identification Circuit

Mitel Networks 

Applications

The circuit shown in Figure 6 illustrates the use of

the MT8841 device in a typical FSK receiver system.

Bellcore Special Report SR-TSV-002476 specifies

that the FSK receiver should be able to receive FSK

signal levels as follows:

Received Signal Level at 1200Hz:

-32dBm to -12dBm

Received Signal Level at 2200Hz:

-36dBm to -12dBm

This condition can be attained by choosing suitable

values of R1 and R2. The MT8841 configured in a

unity gain mode as shown in Fig. 6 meets the above

level requirements.

For applications requiring detection of lower FSK

signal level, the input op amp may be configured to

provide adequate gain.

MT8841

+5V

C1

R1

R2

C2

Notes:

R1, R2 = 100 kΩ 1%

R3, R4 = 100 kΩ 10%

C1, C2, C3 = 0.1µF 20%

X-tal = 3.579545 MHz

X-tal

MT8841

IN +

IN -

GS

VRef

CAP

OSC1

OSC2

VSS

VDD

IC2

IC1

PWDN

CD

DR

DATA

DCLK

C3

R3

R4

Figure 6 - Application Circuit (Single-Ended Input)

To

Controller

5-15

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