DATA BULLETIN
MX465
Features
Meets TIA/EIA-603 Standards
47 CTCSS Tones + Notone
TX/RX Speech Filters
Improved Sinad
Serial or Parallel Programming
Easy µP Interface
Scanning on any Channel
Standard 4MHz Xtal
(See MX165C for 1MHz)
Low Voltage 3.3V to 5.0V
TONE IN
FILTER
LOW VOLTAGE
CTCSS ENCODER/DECODER
with Tx and Rx Audio Filters
Applications
Mobile Radio Channel Sharing
Scan Trunking
Wireless Intercom Traffic Control
Hookswitch Supervision
Repeater Control
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
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The MX465 CTCSS Encoder/Decoder is a low voltage, CMOS device that meets TIA/EIA-603 Standards.
The MX465 will encode and decode the tones 159.8Hz, 183.5Hz, 189.9Hz, 196.6Hz, 199.5Hz, 206.5Hz,
229.1Hz, and 254.1Hz in addition to the 39 standard CTCSS tones, for a total of 47 CTCSS tones + Notone.
With the incorporation of the on-chip TX and RX speech filter, the MX465 enhances voice/tone multiplexing by
attenuating TX and RX speech 36dB at frequencies below 250Hz while passing signals > 300Hz with only
1dB of ripple. This not only minimizes CTCSS talk-off in the TX mode but also improves Hum and Noise
performance in the RX mode.
Available in the following package styles: 24-pin TSSOP (MX465TN), 24-pin SSOP (MX465DS),
24-pin SOIC (MX465DW), 24-pin PLCC (MX465LH), 24-pin PDIP (MX465P), and 24-pin CDIP (MX465J) the
MX465 requires a single 3.3V to 5.0V supply and a 4MHz clock or crystal.
©1998 MX•COM, INC.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. #20480143.008
4800 Bethania Station Road, winston-Salem, NC 27105-1201 USA
All trademarks and service marks are held by their respective companies.
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RX TONE DETECT
TX TONE OUT
-
-
V
DD
V
SS
V
BIAS
TX AUDIO OUT
RX AUDIO OUT
RX TONE DECODE
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CMLMICRO [ CML MICROCIRCUITS ]
