MT8840AE Ver la hoja de datos (PDF) - Mitel Networks

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componentes Descripción

Fabricante

MT8840AE

ISO2-CMOS Data Over Voice Modem

Mitel Networks 

MT8840 ISO2-CMOS

DET 1

CRx 2

Rxl 3

RxE 4

LOOP 5

VRef 6

TxO 7

TxDI 8

VSS 9

18 VDD

17 RxDO

16 OSC2

15 OSC1

14 CK32

13 ETC

12 MTC

11 TCO

10 FATC

18 PIN PLASTIC DIP/SOIC

Pin Description

Pin #

1

Name

DET

2

CRx

3

RxI

4

RxE

5

LOOP

6

VRef

7

TxO

8

TxDI

9

VSS

10

FATC

11

TCO

12

MTC

13

ETC

14

CK32

15

OSC1

16

OSC2

17

RxDO

18

VDD

Figure 2 - Pin Connections

Description

Demodulator detection level adjust input (Analog). Internal resistor divider applies

2.36V in open circuit condition. Connection of external resistor will vary detect level.

External AGC time constant adjust input (Analog). Connect external capacitor to VSS.

Modulated receive signal input (Analog). Biased at VRef.

Receive enable input (Digital) with internal pull up. Active high.

Self-test mode select input (Digital) with internal pull down. Active high.

Internal reference supply voltage input (Analog) .

Modulated transmit carrier output (Analog).

Transmit data input (Digital).

Negative power supply.

Tone caller center frequency adjust input (Analog).

Tone caller output (Digital).

Mute tone caller input (Digital) with internal pull down. Active high.

Enable tone caller input (Digital) with internal pull down. Active high.

32 kHz data strobe output (Digital).

Clock Input

Clock Output to drive external devices.

3.579545 MHz crystal connected between

these pins completes internal oscillator.

Receive data output (Digital). Synchronized to CK32.

Positive power supply.

5-4

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