MT8841AS datasheet(5/10 Pages) MITEL

Part #	MT8841AS

Description	CMOS Calling Number Identification Circuit

PDF	10 Pages

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Manufacturer	MITEL [Mitel Networks Corporation]

Direct Link	http://www.mitel.com

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5 / 10 page

MT8841

5-15

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.

Figure 6 - Application Circuit (Single-Ended Input)

+5V

X-tal

MT8841

IN +

IN -

VRef

CAP

OSC1

OSC2

VSS

VDD

IC2

IC1

PWDN

DATA

DCLK

Controller

Notes:

R1, R2 = 100 k

Ω 1%

R3, R4 = 100 k

Ω 10%

C1, C2, C3 = 0.1

µF 20%

X-tal = 3.579545 MHz

MT8841AS Datasheet(PDF) 5 Page - Mitel Networks Corporation

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