Electrical Characteristics

(VDD = +3.3V, T = 25o C)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP

MAX

UNITS

---------------------------------------------------------------------------------------------------

DC Specifications

--------------------------------------- -------------------------------------------

Operating Voltage

VDD

3.3

5.0

5.5

V

---------------------------------------------------------------------------------------------------

Supply Current

IDD

4.0

mA

-------------------------------------------------------------------------------------------------

Power Down Current

IDDPD

300

500

uA

------------------------------------------

Analog Ref. Voltage

VREF

0.5*VDD

V

------------------------------------------

Input Voltage Low

VIL

0.3*VDD

V

---------------------------------------------------------

Input Voltage High

VIH

0.7*VDD

V

---------------------------------------------------------------- --

Output Voltage Low

VOL

0.3

V

--------------------------------------------------------------------

Output Voltage High

VOH

0.8*VDD

V

-----------------------------------------------------------------------------------------------

Input Current

10

uA

--------------------------------------------------------------------------------------------------

Output Current High

IOH

200

uA

---------------------------------------------------------------------------

Output Current Low

IOL

2

mA

--------------------------------------------------------------------------

AC Specifications

---------------------------------------------------------------------------------------------------

Serial Data Clock Rate

0.2

MHz

CTCSS Passband Gain

250 Hz

-1

1

dB

CTCSS Stopband Gain

500 Hz

-35

dB

Speech Filter Passband Gain

-1

1

dB

Speech Filter Stopband Gain

-------------------------------------------------------------------------- ------------------------

Master Clock Frequency

3.57955

MHz

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©

2014 Mixed Signal Integration

2

10/2014

Communications Baseband Transceiver

Data Sheet

Application IInformation

_______

The MSCBT is controlled by a serial data word which

contains both the address and and data in a single 16

bit string. Figure 3 shows the timing of the Serial data

clock, sync pulse and data I/O. For Analog to Digital

conversion, the data port changes from input to output

when the ADC is read and with the transition of high

to low of ENBL. Figure 4 gives the details. Note that

the I/O connected to DATA must switch from output to

input after the first cycle after ENBL going low.

Note that to simplify the text the CTCSS and

CDCSS filters are referred to as CxCSS filters.