MSCBT datasheet(10/12 Pages) MSI

10 / 12 page

www.mix-sig.com

2014 Mixed Signal Integration

10/2014

Communications Baseband Transceiver

Data Sheet

NC_1

VDDA

RXIN

TXTONE

ADIN

NC_6

NC_7

SLEEP

DATA

DGND

RXTIN+

COMPOUT

RXTIN-

CxCSSTOUT

AGND

MSCBT

PPin D

Descriptions

_______

Pin Number

Pin Name

Description

NC_1

DO NOT CONNECT TO

THIS PIN.

For testing only

VDDA

Positive Analog Supply.

Nominally 3.30 VDC.

Decouple with 0.1 uF cap.

RXIN

Receive signal pin input.

This is the input for CTCSS

or CDCSS

filtering.

TXTONE Transmit modulation signal input

Squarewave CTCSS or CTCSS

data filter input.

ADIN

Analog to Digital converter

input

NC_6

DO NOT CONNECT TO

THIS PIN.

For testing only

NC_7

DO NOT CONNECT TO

THIS PIN.

For testing only

SLEEP

Power down when Low

Pin Number

Pin Name

Description

DAC1O

DAC1 OUTPUT

DAC2O

DAC2 OUTPUT

ENABLE

Enables serial I/O port

when low.

CLOCK

Serial Data Clock input

RESET

Resets Digital functions

when low

VREF

Voltage Reference. Generated

internally Decouple with

10 uF

capacitor

DVDD

DIGITAL POSITIVE SUPPLY

A 0.1 uF decoupling capacitor

is needed.

nominally 3.3VDC

CRYSTAL OSCILLATOR OUTPUT

3.579545 MHz crystal is tied

to this pin

CRYSTAL OSCILLATOR INPUT

3.579545 MHz crystal is tied

to this pin

DATA

SERIAL DATA I/O

This input becomes an output

when reading A/D converter

DGND

DIGITAL GROUND. Tie to 0VDC

RXTIN+

POSITIVE COMPARATOR INPUT

COMPOUT

COMPARATOR OUTPUT

RXTIN-

NEGATIVE COMPARATOR INPUT

CxCSSOUT

TONE FILTER OUTPUT

AGND

ANALOG GROUND (0Vdc)

TONEIN

CxCSS or DTMF TONE

TRANSMISSION INPUT

AGND

ANALOG GROUND (0Vdc)

BYPASS

TIE 10 uF CAPACITOR TO AGND

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