Low Voltage CTCSS Encoder/Decoder
3
MX165C
Block Diagram
TONE IN
FILTER
TONE DECODE
FILTER
REFERENCE
VOLTAGE
TONE IN
f TONE
CLKS
CLKS
LOAD/LATCH
D5/SERIAL ENABLE 1
D4/SERIAL ENABLE 2
D3/SERIAL DATA IN
D2/SERIAL CLOCK
D1
D0
RX/TX
PTL
XTAL/CLK
XTAL
DIGITAL
INTERFACE
AND
CLOCK
GENERATION
CLKS/XTAL
TONE DETECT
LOGIC
TONE OUT FILTER
CLKS/XTAL
A0-A5
D0-D10
TONE
ROM
48 x 10
TX AUDIO IN
CLK
RX AUDIO IN
300Hz
AUDIO FILTER
DECODE COMPARATOR REF.
DECODE COMPARATOR IN
+
-
Figure 1 : Block Diagram
© 1997 MX•COM Inc.
www.mxcom.com Tele: 800 638-5577 910 744-5050
Fax: 910 744-5054
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
All trademarks and service marks are held by their respective companies.
+
RX TONE DETECT
TX TONE OUT
-
-
V
DD
V
SS
V
BIAS
TX AUDIO OUT
RX AUDIO OUT
RX TONE DECODE
+
Doc. # 20480102.008
CMLMICRO [ CML MICROCIRCUITS ]
