CMLMICRO MX465

DATA BULLETIN
LOW VOLTAGE
CTCSS ENCODER/DECODER
MX465
with Tx and Rx Audio Filters
Features
Applications
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 DECODE
FILTER
TONE IN
FILTER
TONE IN
f TONE
+
-
+
CLKS
CLKS
CLKS/XTAL
D4/SERIAL ENABLE 2
D3/SERIAL DATA IN
RX/TX
PTL
REFERENCE
VOLTAGE
-
LOAD/LATCH
D5/SERIAL ENABLE 1
D2/SERIAL CLOCK
D1
D0
Mobile Radio Channel Sharing
Scan Trunking
Wireless Intercom Traffic Control
Hookswitch Supervision
Repeater Control
DIGITAL
INTERFACE
AND
CLOCK
GENERATION
A0-A5
D0-D10
XTAL
CLK
TX AUDIO IN
DECODE COMPARATOR REF.
DECODE COMPARATOR IN
RX TONE DETECT
TONE OUT FILTER
TX TONE OUT
CLKS/XTAL
XTAL/CLK
RX AUDIO IN
TONE DETECT
LOGIC
300Hz
AUDIO FILTER
+
-
TONE
ROM
48 x 10
VDD
VSS
VBIAS
TX AUDIO OUT
RX AUDIO OUT
RX TONE DECODE
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
4800 Bethania Station Road, winston-Salem, NC 27105-1201 USA
Doc. #20480143.008
All trademarks and service marks are held by their respective companies.
Low Voltage CTCSS Encoder/Decoder
2
MX465
CONTENTS
Section
Page
1. Block Diagram ................................................................................................................. 3
2. Signal List ........................................................................................................................ 4
3. External Components ..................................................................................................... 6
4. General Description ........................................................................................................ 7
4.1 Description ............................................................................................................................. 7
4.2 I/O Conditions......................................................................................................................... 7
4.3 Filter Response ...................................................................................................................... 8
4.4 Serial and Parallel Mode Timing ............................................................................................ 8
4.5 CTCSS Programming........................................................................................................... 10
5. Performance Specification ........................................................................................... 11
5.1 Electrical Performance ......................................................................................................... 11
5.1.1 Absolute Maximum Ratings ........................................................................................................ 11
5.1.2 Operating Limits.......................................................................................................................... 12
5.2 Packaging............................................................................................................................. 14
MX-COM, Inc. Reserves the right to change specifications at any time and without notice
©1998 MX•COM, INC.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
4800 Bethania Station Road, winston-Salem, NC 27105-1201 USA
Doc. #20480143.008
All trademarks and service marks are held by their respective companies.
Low Voltage CTCSS Encoder/Decoder
3
MX465
1 Block Diagram
TONE DECODE
FILTER
TONE IN
FILTER
TONE IN
f TONE
+
-
-
+
CLKS
CLKS
LOAD/LATCH
D5/SERIAL ENABLE 1
CLKS/XTAL
D4/SERIAL ENABLE 2
D3/SERIAL DATA IN
D2/SERIAL CLOCK
D1
D0
RX/TX
PTL
REFERENCE
VOLTAGE
DIGITAL
INTERFACE
AND
CLOCK
GENERATION
TONE DETECT
LOGIC
TONE OUT FILTER
TX TONE OUT
CLKS/XTAL
A0-A5
D0-D10
XTAL/CLK
XTAL
TONE
ROM
48 x 10
CLK
TX AUDIO IN
RX AUDIO IN
300Hz
AUDIO FILTER
DECODE COMPARATOR REF.
VDD
VSS
VBIAS
TX AUDIO OUT
RX AUDIO OUT
RX TONE DECODE
+
-
DECODE COMPARATOR IN
RX TONE DETECT
Figure 1 : Block Diagram
©1998 MX•COM, INC.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
4800 Bethania Station Road, winston-Salem, NC 27105-1201 USA
Doc. #20480143.008
All trademarks and service marks are held by their respective companies.
Low Voltage CTCSS Encoder/Decoder
4
MX465
2 Signal List
Pin No.
Signal
Type
Description
1
VDD
power Positive supply. This pin should be bypassed to VSS by
a capacitor mounted close to the device pins.
2
XTAL/CLOCK
input
3
XTAL
4
LOAD / LATCH
input
Controls 8 on-chip latches. It is used to latch RX / TX ,
PTL, and D0-D5. A logic 1 applied to this input places the
8 latches in the ‘transparent’ mode. A logic 0 applied to
this input places the 8 latches in the ‘latched’ mode. In
Parallel Mode, data is loaded and latched by a logic 1-0
transition (see Figure 4). In Serial Mode, data is loaded
and latched by a 0-1-0 strobe pulse on this pin (see
Figure 5). Internally pulled to VDD
5
D5 / SERIAL ENABLE 1
input
Data input D5 (Parallel Mode). A logic 1 applied to this
input together with a logic 0 applied to
D4/SERIAL ENABLE 2 will place the device in Serial
Mode (see Figure 5). Internally pulled to VDD.
6
D4 / SERIAL ENABLE 2
input
Data input D4 (Parallel Mode). A logic 0 applied to this
input together with a logic 1 applied to D5 / SERIAL
ENABLE 1 will place the device in Serial Mode
(see Figure 5). Internally pulled to VDD.
7
D3 / SERIAL DATA IN
input
Data input D3 (Parallel Mode). In Serial Mode this pin
becomes the serial data input for D5-D0, RX/ TX and PTL
(see Figure 5). D5 is clocked first and PTL last.
Internally pulled to VDD.
8
D2 / SERIAL CLOCK
input
Data input D2 (Parallel Mode). In Serial Mode this pin
becomes the SERIAL CLOCK input. Data is clocked on
the positive going edge (see Figure 5). Internally pulled
to VDD.
9
D1
input
Data input D1 (Parallel Mode). Internally pulled to VDD.
10
D0
input
Data input D0 (Parallel Mode). Internally pulled to VDD.
11
VSS
power Negative supply.
12
DECODE COMPARATOR
REF.
input
13
RX TONE DECODE
14
DECODE COMPARATOR IN
15
RX TONE DETECT
©1998 MX•COM, INC.
Input to the on-chip inverter used with a 4 MHz Xtal or
external clock source.
output Output of the on-chip inverter (clock output).
Internally biased to VDD/3 or 2 VDD/3 via 1M resistors
depending on the logic state of the
RX TONE DECODE pin. RX TONE DECODE = 1 will
bias this input 2 VDD/3; a logic 0 will bias this input VDD/3.
This input provides the DECODE COMPARATOR
REFERENCE voltage, and the switching of bias voltages
provides hysteresis to reduce ‘chatter’ under marginal
conditions.
output Gated output of the decode comparator. This output is
used to gate the RX Audio path. A logic 0 on this pin
indicates a successful decode and the DECODE
COMPARATOR IN pin is more positive than the
DECODE COMPARATOR REF. input (see Table 3).
input
Inverting input of the DECODE COMPARATOR. This pin
is normally connected to the integrated output of the RX
TONE DETECT line.
output In RX mode this output will go to logic 1 during a
successful decode. It must be externally integrated to
control response and deresponse times (see Table 3).
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
4800 Bethania Station Road, winston-Salem, NC 27105-1201 USA
Doc. #20480143.008
All trademarks and service marks are held by their respective companies.
Low Voltage CTCSS Encoder/Decoder
Pin No.
Signal
5
Type
MX465
Description
16
TX TONE OUT
output The CTCSS sinewave output appears on this pin under
control of the RX/ TX pin. When not transmitting a tone,
TX TONE OUT may be biased to VDD/2. (see Table 3).
17
RX/ TX
input
RX or TX modes selected in Parallel Mode (see Figure
4). In Serial Mode this function is serially loaded. This
pin is internally pulled to VDD via a 1M resistor.
18
PTL
input
In RX mode this pin operates as a ‘Push To Listen’
function by enabling the RX audio path, thus overriding
the tone squelch function (Parallel Mode). In Serial Mode
this function is loaded serially. Internal pull-up to VDD
19
RX AUDIO OUT
output High pass filtered RX AUDIO OUT. This pin outputs
audio when RX TONE DECODE = logic 0, PTL = logic 1,
or when Notone is programmed (see Table 4). In TX
mode this pin is biased to VDD/2.
20
TX AUDIO OUT
output High pass filtered TX AUDIO OUT pin. In TX mode this
pin outputs audio present at the TX AUDIO IN pin. In RX
mode this pin is biased to VDD/2
21
VBIAS
output Output of an internally generated VDD /2 bias level that
would normally be externally bypassed to VSS via
capacitor C6.
22
TX AUDIO IN
input
In TX mode TX AUDIO IN may be prefiltered, using the
TX Audio path, thus helping to avoid talk-off due to
intermodulation of speech frequencies with the
transmitted CTCSS tone. Internally biased to VDD/2.
23
RX AUDIO IN
input
24
TONE INPUT
input
Input to the audio high pass filter in RX mode. Internally
biased to VDD/2.
Input to the CTCSS tone detector. Internally biased to
VDD/2.
Table 1: Signal List
©1998 MX•COM, INC.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
4800 Bethania Station Road, winston-Salem, NC 27105-1201 USA
Doc. #20480143.008
All trademarks and service marks are held by their respective companies.
Low Voltage CTCSS Encoder/Decoder
6
MX465
3 External Components
VDD
C1
VDD
C2
XTAL/CLK
X1
C3
XTAL
R1
LOAD / LATCH
D5/SERIAL ENABLE 1
D4/SERIAL ENABLE 2
D3/SERIAL DATA IN
D2/SERIAL CLOCK
D1
D0
VSS
DECODE COMPARATOR REF.
1
24
2
23
3
22
4
21
5
20
6
19
7
MX465
18
8
17
9
16
10
15
11
14
12
13
TONE IN
C4
RX AUDIO IN
C5
TX AUDIO IN
C10
VBIAS
C6
TX AUDIO OUT
C11
RX AUDIO OUT
C7
PTL
RX / TX
TONE OUT
C8
R2
RX TONE DETECT
DECODE COMPARATOR IN
D1
R3
C9
RX TONE DECODE
Figure 2 : Recommended External Components for Typical Application
1.0M
10%
C6
R2
560k
10%
C7
R3
820k
10%
C1
0.1F
R1
Note 1
0.47F
20%
Note 2
0.1F
20%
C8
Note 2
0.1F
20%
20%
C9
Note 2
0.1F
20%
C2
Note 1
18pF
20%
C10
Note 2
0.1F
20%
C3
Note 1
33pF
20%
C11
Note 2
0.1F
20%
C4
Note 2
0.1F
20%
D1
C5
Note 2
0.1F
20%
X1
small signal
Note 1
4MHz
100ppm max.
Table 2: External Components
External Components Notes:
1. The values specified for R1, C2, and C3 have been found to be satisfactory when used with a crystal
(X1) whose equivalent series resistance is 1000. For best results, a crystal oscillator design should
drive the clock inverter input with signal levels of at least 40% of VDD, peak to peak. Tuning fork
crystals generally cannot meet this requirement. To obtain crystal oscillator design assistance, consult
your crystal manufacturer.
2. The 0.1F value for the DC Blocking capacitors, C4, C5, C7, C8, C9, C10, and C11 is not a
requirement. For the capacitors C4, C5, and C10, the input impedance is internal to the device and
specified typical as 550k. For the remaining capacitors external circuits will be important in
determining the input impedance.
©1998 MX•COM, INC.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
4800 Bethania Station Road, winston-Salem, NC 27105-1201 USA
Doc. #20480143.008
All trademarks and service marks are held by their respective companies.
Low Voltage CTCSS Encoder/Decoder
7
MX465
4 General Description
4.1
Description
Voice on shared radio channels are multiplexed with a subaudible CTCSS (Continuous Tone Controlled
Subaudible Squelch) tone as a means of directing messages among user groups sharing the same RF
frequencies. CTCSS modulates the transmitter with a discrete tone, from 39 standard CTCSS tones in the
range (67.0Hz to 250.0Hz) according to TIA/EIA-603. There are an additional eight CTCSS tones not
specified in TIA/EIA-603 that the MX465 will encode and decode. They are : 159.8Hz, 183.5Hz, 189.9Hz,
196.6Hz, 199.5Hz, 206.5Hz, 229.1Hz, and 254.1Hz, for a total of 47 CTCSS tones plus Notone.
The MX465 also incorporates TX/RX on chip speech filters. In early CTCSS designs, TX speech was not
filtered from the CTCSS tone, rather the filtering was dependent upon the host transmitter’s pre-emphasis
network. At only 6dB/octave, the attenuation of speech components at higher CTCSS tones was only a few
dB which resulted in talk-off (low frequency voice components unsquelching the receiver audio).
4.2
I/O Conditions
Tone
No Tone
Tone
Tone
Tone
No Tone
0
0
1
1
1
1
PTL
0
X
0
1
X
X
Decode Comparator In
X
X
0
0
1
X
RX TONE DETECT
0
0
0
0
1
X
RX TONE DECODE
1
1
1
1
0
0
Result / Function
Tone Transmitter Enabled
Yes
No (Bias)
No (Bias)
No (Bias)
No (Bias)
No (Bias)
TX Audio Path Enabled
Yes
Yes
No
No
No
No
Tone Decode Enabled
No
No
Yes
Yes
Yes
Yes
RX Audio Path Enabled
No (Bias)
No (Bias)
No (Bias)
Yes
Yes
Yes
1
2
3
4
5
6
D0-D5
Input Pins Condition
RX / TX
Output Pins Condition
Notes
Notes:
1. Normal tone transmit condition.
2. Notone programmed in TX mode, tone transmit output set to VDD/2. TX audio path enabled.
3. Normal decode standby.
4. Normal decode standby with PTL used to enable audio.
5. Normal decode of correct CTCSS tone condition, PTL has no effect.
6. Notone programmed in RX mode, tone transmit output (Bias). RX audio path enabled.
7. X = don’t care
Table 3: Combinations of Input / Output conditions
©1998 MX•COM, INC.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
4800 Bethania Station Road, winston-Salem, NC 27105-1201 USA
Doc. #20480143.008
All trademarks and service marks are held by their respective companies.
Low Voltage CTCSS Encoder/Decoder
4.3
8
MX465
Filter Response
Gain (dB)
0
-10
-20
Voiceband Frequencies
CTCSS Frequencies
-30
-33
-40
-50
-60
250.3
-70
200
100
300
400
Frequency (Hz)
Figure 3 : Voiceband Filter Response
4.4
Serial and Parallel Mode Timing
D0-D5
RX/TX, PTL
tSP
tL
LOAD/LATCH
Figure 4 : Parallel Mode
©1998 MX•COM, INC.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
4800 Bethania Station Road, winston-Salem, NC 27105-1201 USA
Doc. #20480143.008
All trademarks and service marks are held by their respective companies.
Low Voltage CTCSS Encoder/Decoder
9
MX465
1
D5
SERIAL
ENABLE
0
1
D4
0
DATA
(Note)
SERIAL
CLOCK
1
t1
DATA D5
DATA D4
D3
RX/TX
PTL
D3
0
tSS
t2
tH
D2
tC
0
tL
LOAD DATA
LOAD/
LATCH
L/L
LATCH DATA
DON'T
CARE
DATA
LATCHED
DON'T CARE
- 1MΩ PULL UP
D1
DON'T CARE
- 1MΩ PULL UP
D0
Note : Serial bit 1 through bit 8 = D5, D4, D3, D2, D1, D0, RX/TX and PTL respectively. Load bit 1 first, bit 8 last
Figure 5 : Serial Mode
©1998 MX•COM, INC.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
4800 Bethania Station Road, winston-Salem, NC 27105-1201 USA
Doc. #20480143.008
All trademarks and service marks are held by their respective companies.
Low Voltage CTCSS Encoder/Decoder
4.5
10
MX465
CTCSS Programming
Tone
•
•
•
Programming Inputs
f0 (%)
D5
D4
D3
D2
D1
D0
Hex
66.98
-0.029
1
1
1
1
1
1
3F
69.3
69.32
0.024
1
1
1
0
0
1
39
71.9
71.901
0.001
0
1
1
1
1
1
1F
74.4
74.431
0.042
1
1
1
1
1
0
3E
77.0
76.965
-0.046
0
0
1
1
1
1
0F
79.7
79.677
-0.029
1
1
1
1
0
1
3D
82.5
82.483
-0.021
0
1
1
1
1
0
1E
85.4
85.383
-0.020
1
1
1
1
0
0
3C
88.5
88.494
-0.007
0
0
1
1
1
0
0E
91.5
91.456
-0.048
1
1
1
0
1
1
3B
94.8
94.76
-0.042
0
1
1
1
0
1
1D
97.4
97.435
-0.036
1
1
1
0
1
0
3A
100.0
99.96
-0.040
0
0
1
1
0
1
0D
103.5
103.429
-0.069
0
1
1
1
0
0
1C
107.2
107.147
-0.05
0
0
1
1
0
0
0C
110.9
110.954
0.049
0
1
1
0
1
1
1B
114.8
114.84
0.035
0
0
1
0
1
1
0B
118.8
118.793
-0.006
0
1
1
0
1
0
1A
123.0
123.028
0.023
0
0
1
0
1
0
0A
127.3
127.328
0.022
0
1
1
0
0
1
19
131.8
131.674
-0.095
0
0
1
0
0
1
09
136.5
136.612
0.082
0
1
1
0
0
0
18
141.3
141.323
0.016
0
0
1
0
0
0
08
146.2
146.044
-0.107
0
1
0
1
1
1
17
151.4
151.441
0.027
0
0
0
1
1
1
07
156.7
156.875
0.112
0
1
0
1
1
0
16
159.8
159.936
0.085
1
1
0
0
0
1
31
162.2
162.311
0.069
0
0
0
1
1
0
06
167.9
167.708
-0.114
0
1
0
1
0
1
15
173.8
173.936
0.078
0
0
0
1
0
1
05
179.9
179.654
-0.137
0
1
0
1
0
0
14
183.5
183.680
0.098
1
1
0
0
1
0
32
186.2
186.289
0.048
0
0
0
1
0
0
04
189.9
190.069
0.089
1
1
0
0
1
1
33
Nominal
Frequency (Hz)
MX465
Frequency
(Hz)
67.0
192.8
192.864
0.033
0
1
0
0
1
1
13
•
196.6
196.329
-0.138
1
1
0
1
0
0
34
•
199.5
199.312
-0.094
1
1
0
1
0
1
35
203.5
203.645
0.071
0
0
0
0
1
1
03
•
206.5
206.207
-0.142
1
1
0
1
1
0
36
210.7
210.848
0.070
0
1
0
0
1
0
12
218.1
217.853
-0.113
0
0
0
0
1
0
02
©1998 MX•COM, INC.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
4800 Bethania Station Road, winston-Salem, NC 27105-1201 USA
Doc. #20480143.008
All trademarks and service marks are held by their respective companies.
Low Voltage CTCSS Encoder/Decoder
11
MX465
Tone
Programming Inputs
Nominal
Frequency (Hz)
MX465
Frequency
(Hz)
f0 (%)
D5
D4
D3
D2
D1
D0
Hex
225.7
225.339
-0.160
0
1
0
0
0
1
11
229.1
229.279
0.078
1
1
0
1
1
1
37
233.6
233.359
-0.103
0
0
0
0
0
1
01
241.8
241.970
0.070
0
1
0
0
0
0
10
250.3
250.282
-0.007
0
0
0
0
0
0
00
254.1
254.162
0.024
1
1
1
0
0
0
38
•
•
Notone
•
Serial input mode
Not specified in the TIA/EIA tone set
N/A
1
1
0
0
0
0
30
N/A
1
0
Data
Clock
X
X
2X
Table 4: CTCSS Tones
5 Performance Specification
5.1
5.1.1
Electrical Performance
Absolute Maximum Ratings
Exceeding these maximum ratings can result in damage to the device. Operation of the device outside the
operating limits is not implied.
General
Min.
Max.
Units
Supply (VDD - VSS)
Voltage on any pin to VSS
-0.3
7.0
V
-0.3
VDD + 0.3
V
VDD
-30
30
mA
VSS
-30
30
mA
any other pins
-20
20
mA
800
mW
10
mW/°C above 25°C
Current
TN / DW / LH / DIP Package
Total Allowable Power Dissipation at TAMB =25°C
Derating above 25°C
Storage Temperature
-55
125
°C
Operating temperature
- 40
85
°C
550
mW
9
mW/°C above 25°C
DS Package
Total Allowable Power Dissipation at TAMB =25°C
Derating above 25°C
Storage Temperature
-55
125
°C
Operating temperature
- 40
85
°C
©1998 MX•COM, INC.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
4800 Bethania Station Road, winston-Salem, NC 27105-1201 USA
Doc. #20480143.008
All trademarks and service marks are held by their respective companies.
Low Voltage CTCSS Encoder/Decoder
5.1.2
12
MX465
Operating Limits
Correct operation of the device outside these limits is not implied.
5.1.3
Min.
Max.
Units
Supply (VDD-VSS)
2.7
5.5
V
Xtal Frequency
4.0
4.0
MHz
Operating Temperature
-40
85
°C
Operating Characteristics
For the following conditions unless otherwise specified:
VDD = 3.3V / 5.0V at TAMB = 25°C, VSS = 0V,
Xtal Frequency = 4.0 MHz, 100ppm max.
(Over the life of the XTAL the operating range may vary from 100ppm up to 1000ppm)
0dB ref. = 750mVRMS (proportional to VDD; see note 17)
Composite Signal:
1kHz test tone = 300mVRMS, f0 CTCSS tone = 30 mVRMS, 75mVRMS Noise (band limited to 6kHz
Gaussian)
Notes
Min.
Typ.
Max.
Units
2.7
3.3/5.0
5.5
V
VDD = 5.0V
3.7
4.2
mA
VDD = 3.3V
1.3
1.6
mA
Static Values
Supply voltage
Supply current
Analog input impedance
18
Analog output impedance
18
Digital Input impedance
480
550
k
400
1,18
25
Input logic 1
1
70%VDD
Input logic 0
1
Output Logic 1 source = 0.1mA
2
Output Logic 0 sink = 0.1mA
2
1000
40
k
V
30%VDD
80%VDD
V
V
20%VDD
V
Dynamic Values
Speech filter
Total harmonic distortion
5,8,19
1.0
1.5
%
Output noise level (input AC short
circuit, audio switch enabled)
8,18
0.5
1.0
mVRMS
Sinad
8,9
Spurious emissions
18
40
300
Bandpass ripple
8
1
7,8,19
Passband gain 1kHz
TX/RX isolation
©1998 MX•COM, INC.
dB
- 48
Cutoff frequency
Stopband attenuation <250Hz
50
5
33
36
- 0.5
0
60
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
4800 Bethania Station Road, winston-Salem, NC 27105-1201 USA
dB
Hz
1.8
dB
dB
0.5
dB
dB
Doc. #20480143.008
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Low Voltage CTCSS Encoder/Decoder
13
MX465
Notes
Min.
Typ.
Max.
Units
12
- 1.0
0
1.0
dB
0.3
%f0
15
75
ms
Encoder
Tone output level
Tone Frequency Accuracy (f error)
- 0.3
Risetime to 90% nominal output
f0>100Hz
4,10
f0<100Hz
4,10
45
120
ms
19
1.5
2
%
Pure tone decode threshold
19
7
15
mVRMS
Composite signal decode threshold
3
30
mVRMS
Total Harmonic Distortion
Decoder
Decode input signal level
16
-20
3.5
dB
Pure tone decode response time
13,14
95
115
140
ms
Pure tone decode deresponse time
13,15
95
130
170
ms
Decode response time
3,6,10
250
ms
180
250
ms
Deresponse time
3,10
Decode selectivity:
Upper decode band edge
3,11,19,20
1.005f0
1.015f0
0.995f0+1
Hz
Lower decode band edge
3,11,19,20
1.005f0-1
0.985f0
0.995f0
Hz
Serial / Parallel Inputs
Parallel Set Up Time (tSP)
400
ns
Load / Latch Pulse Width (tL)
400
ns
Serial Clock Pulse Width (tC)
400
ns
Serial Data Set-Up Time (tSS)
400
ns
Serial Data Hold Time (tH)
400
ns
Serial Enable Time (t1)
400
ns
Serial Load / Latch Set-Up Time (t2)
400
ns
Serial Clock Frequency
1
MHz
Operating Characteristics Notes:
1. Refers to RX/TX, PTL, Decode Comparator Input, D0-D5.
2. All logic outputs.
3. Composite signal test condition.
4. Any programming tone and RL = 10k, CL = 15pF.
5. With an input level of 0dB @1kHz
6. f0>100Hz (for 100 Hz> f0>67Hz: t=100/ f0Hz x 250ms)
7. See Figure 3.
8. Measured in a 30kHz bandwidth.
9. With an input level of -3.5dB @1kHz
10. Per TIA/EIA-603.
11. Per TIA/EIA-603, device will not decode adjacent TIA/EIA-603 Tones.
12. Tone output level is proportional to VDD.
13. f0=156.7Hz @ -20dB.
14. Typically 12.5 Tone Cycles + 40ms.
15. Typically 7 Tone Cycles + 90ms.
©1998 MX•COM, INC.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
4800 Bethania Station Road, winston-Salem, NC 27105-1201 USA
Doc. #20480143.008
All trademarks and service marks are held by their respective companies.
Low Voltage CTCSS Encoder/Decoder
14
MX465
16. Max composite signal is 3.5dB with:
Noise (band limited 6kHz Gaussian) = -12dB ref to 1kHz test tone
f0 CTCSS tone = -20dB ref to 1kHz test tone
17. For maximum dynamic range, set audio level to 0dB, VDD x150mVRMS, using minimum VDD under
which system is intended to work. (e.g. for a 2.7V system, use 0dB equal to 405mVRMS).
18. By characterization only.
19. Batch sampled only
20. For example, if: f0 = 100.0Hz (f0-1 = 97.4Hz f0+1 = 103.5Hz)
5.2
Decode Selectivity
Min
Typ
Max
Unit
Upper Decode Band Edge
100.5
101.5
102.98
Hz
Lower Decode Band Edge
97.89
98.5
99.5
Hz
Packaging
Package Tolerances
A
DIM.
B
ALTERNATIVE
PIN
LOCATION
MARKING
E
L
T
PIN 1
Y
C
H
MIN.
TYP.
MAX.
0.311 (7.90)
0.303 (7.70)
0.169 (4.30)
0.177 (4.50)
---------0.047 (1.20)
0.248 (6.30)
0.256 (6.50)
0.002 (0.05)
0.006 (0.15)
0.007 (0.17)
0.012 (0.30)
0.030 (0.75)
0.020 (0.50)
0.0256 (0.65)
0.003 (0.08)
0.008 (0.20)
0°
8°
NOTE : All dimensions in inches (mm.)
Angles are in degrees
P
J
A
B
C
E
H
J
L
P
T
Y
Figure 6: 24-pin TSSOP Mechanical Outline: Order as part no. MX465TN
Package Tolerances
A
Z
E
B
L
T
PIN 1
X
Y
H
J
P
C
DIM.
A
B
C
E
H
J
L
P
T
X
Y
Z
MIN.
TYP.
MAX.
0.318 (8.07)
0.328 (8.33)
0.205 (5.20)
0.213 (5.39)
0.066 (1.67)
0.079 (2.00)
0.312 (7.90)
0.301 (7.65)
0.002 (0.05)
0.008 (0.21)
0.010 (0.25)
0.015 (0.38)
0.022 (0.55)
0.037 (0.95)
0.026 (0.65)
0.005 (0.13)
0.009 (0.22)
0°
8°
7°
9°
4°
10°
NOTE : All dimensions in inches (mm.)
Angles are in degrees
Figure 7: 24-pin-SSOP Mechanical Outline: Order as part no. MX465DS
©1998 MX•COM, INC.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
4800 Bethania Station Road, winston-Salem, NC 27105-1201 USA
Doc. #20480143.008
All trademarks and service marks are held by their respective companies.
Low Voltage CTCSS Encoder/Decoder
15
MX465
Package Tolerances
A
Z
B
ALTERNATIVE
PIN
LOCATION
MARKING
E
W
L
T
PIN 1
X
Y
C K
H
P
J
DIM.
A
B
C
E
H
J
K
L
P
T
W
X
Y
Z
MIN.
TYP.
MAX.
0.613 (15.57)
0.299 (7.59)
0.105 (2.67)
0.419 (10.64)
0.020 (0.51)
0.020 (0.51)
0.046 (1.17)
0.597 (15.16)
0.286 (7.26)
0.093 (2.36)
0.390 (9.90)
0.003 (0.08)
0.013 (0.33)
0.036 (0.91)
0.050 (1.27)
0.016 (0.41)
0.050 (1.27)
0.0125 (0.32)
0.009 (0.23)
45°
10°
0°
7°
5°
5°
NOTE : All dimensions in inches (mm.)
Angles are in degrees
Figure 8: 24-pin SOIC Mechanical Outline: Order as part no. MX465DW
E
B
C
Package Tolerances
K
Y
DA
W
J
W
T
PIN 1
P
G
H
DIM.
A
B
C
D
E
F
G
H
J
K
P
T
W
Y
MIN.
TYP.
MAX.
0.409 (10.40)
0.380 (9.61)
0.409 (10.40)
0.380 (9.61)
0.146 (3.70)
0.128 (3.25)
0.435 (11.05)
0.417 (10.60)
0.435 (11.05)
0.417 (10.60)
0.250 (6.35)
0.250 (6.35)
0.023 (0.58)
0.018 (0.45)
0.022 (0.55)
0.047 (1.19)
0.048 (1.22)
0.051 (1.30)
0.049 (1.24)
0.009 (0.22)
0.006 (0.152)
30°
45°
6°
NOTE : All dimensions in inches (mm.)
Angles are in degrees
F
Figure 9: 24-pin PLCC Mechanical Outline: Order as part no. MX465LH
©1998 MX•COM, INC.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
4800 Bethania Station Road, winston-Salem, NC 27105-1201 USA
Doc. #20480143.008
All trademarks and service marks are held by their respective companies.
Low Voltage CTCSS Encoder/Decoder
16
MX465
A
Package Tolerances
DIM.
E
E1
B
T
PIN1
K
K1 C
H
L
J1
J
P
A
B
C
E
E1
F
H
J
J1
K
K1
L
P
T
MIN.
TYP.
MAX.
1.260 (32.00)
1.240 (31.50)
0.583 (14.79)
0.514 (13.06)
0.165 (4.19)
0.230 (5.84)
0.600 (15.23)
0.670 (17.00)
0.594 (15.09)
0.615 (15.61)
1.100 (27.94)
0.02 (0.51)
0.018 (0.46)
0.055 (1.39)
0.050 (1.27)
0.080 (2.03)
0.074 (1.88)
0.080 (2.03)
0.115 (2.92)
0.200 (5.08)
0.10 (2.54)
0.0094 (0.239)
0.0106 (0.269)
NOTE : All dimensions in inches (mm.)
Angles are in degrees
F
Figure 10: 24-pin-CDIP Mechanical Outline: Order as part no. MX465J
A
Package Tolerances
B
E
E1
Y
T
PIN1
K
H
L
C
J
J1
P
DIM.
A
B
C
E
E1
H
J
J1
K
L
P
T
Y
MIN.
TYP.
MAX.
1.270 (32.26)
1.200 (30.48)
0.555 (14.04)
0.500 (12.70)
0.151 (3.84)
0.220 (5.59)
0.600 (15.24)
0.670 (17.02)
0.590 (14.99)
0.625 (15.88)
0.015 (0.38)
0.045 (1.14)
0.015 (0.38)
0.023 (0.58)
0.040 (1.02)
0.065 (1.65)
0.066 (1.67)
0.074 (1.88)
0.121 (3.07)
0.160 (4.05)
0.100 (2.54)
0.008 (0.20)
0.015 (0.38)
7°
NOTE : All dimensions in inches (mm.)
Angles are in degrees
Figure 11: 24-pin PDIP Mechanical Outline: Order as part no. MX465P
©1998 MX•COM, INC.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
4800 Bethania Station Road, winston-Salem, NC 27105-1201 USA
Doc. #20480143.008
All trademarks and service marks are held by their respective companies.
CML Microcircuits
COMMUNICATION SEMICONDUCTORS
CML Product Data
In the process of creating a more global image, the three standard product semiconductor
companies of CML Microsystems Plc (Consumer Microcircuits Limited (UK), MX-COM, Inc
(USA) and CML Microcircuits (Singapore) Pte Ltd) have undergone name changes and, whilst
maintaining their separate new names (CML Microcircuits (UK) Ltd, CML Microcircuits (USA)
Inc and CML Microcircuits (Singapore) Pte Ltd), now operate under the single title CML
Microcircuits.
These companies are all 100% owned operating companies of the CML Microsystems Plc
Group and these changes are purely changes of name and do not change any underlying legal
entities and hence will have no effect on any agreements or contacts currently in force.
CML Microcircuits Product Prefix Codes
Until the latter part of 1996, the differentiator between products manufactured and sold from
MXCOM, Inc. and Consumer Microcircuits Limited were denoted by the prefixes MX and FX
respectively. These products use the same silicon etc. and today still carry the same prefixes.
In the latter part of 1996, both companies adopted the common prefix: CMX.
This notification is relevant product information to which it is attached.
CML Microcircuits (USA) [formerly MX-COM, Inc.] Product Textual Marking
On CML Microcircuits (USA) products, the ‘MX-COM’ textual logo is being replaced by a ‘CML’
textual logo.
Company contact information is as below:
CML Microcircuits
(UK)Ltd
CML Microcircuits
(USA) Inc.
CML Microcircuits
(Singapore)PteLtd
COMMUNICATION SEMICONDUCTORS
COMMUNICATION SEMICONDUCTORS
COMMUNICATION SEMICONDUCTORS
Oval Park, Langford, Maldon,
Essex, CM9 6WG, England
Tel: +44 (0)1621 875500
Fax: +44 (0)1621 875600
[email protected]
www.cmlmicro.com
4800 Bethania Station Road,
Winston-Salem, NC 27105, USA
Tel: +1 336 744 5050,
0800 638 5577
Fax: +1 336 744 5054
[email protected]
www.cmlmicro.com
No 2 Kallang Pudding Road, 09-05/
06 Mactech Industrial Building,
Singapore 349307
Tel: +65 7450426
Fax: +65 7452917
[email protected]
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D/CML (D)/2 May 2002