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DATA BULLETIN
MX165C
Features
* * * * * * * * Meets TIA/EIA-603 Standards 47 CTCSS Tones + Notone TX/RX Speech Filters Improved Sinad Serial or Parallel Programming Easy P Interface Scanning on any Channel Standard 1MHz Xtal (See MX465 for 4MHz) * Low Voltage 3.3V to 5.0V
TONE IN FILTER
Low Voltage CTCSS Encoder/Decoder
with TX/RX 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
+ -
The MX165C CTCSS Encoder/Decoder is a low voltage, CMOS device that meets TIA/EIA-603 Standards. The MX165C 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 MX165C 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 (MX165CTN), 24-pin SOIC (MX165CDW), 24-pin PLCC (MX165CLH), and 24-pin PDIP (MX165CP), the MX165C requires a single 3.3V to 5.0V supply and a 1MHz clock or crystal.
(c) 1997 MX*COM Inc. www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054 Doc. # 20480102.008
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
-
VDD VSS VBIAS
TX AUDIO OUT RX AUDIO OUT RX TONE DECODE
+
Low Voltage CTCSS Encoder/Decoder
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MX165C
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................................................................................................................................................11
5.2 Packaging ................................................................................................................................................ 14
MX*COM, Inc. Reserves the right to change specifications at any time and without notice
(c) 1997 MX*COM Inc.
www.mxcom.com Tele: 800 638-5577 910 744-5050
Fax: 910 744-5054
Doc. # 20480102.008
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.
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
(c) 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
-
VDD VSS VBIAS
TX AUDIO OUT RX AUDIO OUT RX TONE DECODE
+
Doc. # 20480102.008
Low Voltage CTCSS Encoder/Decoder
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MX165C
Signal List
Pin No. 1 2 3 4 VDD XTAL/CLOCK XTAL Signal Type Description
power Positive supply. This pin should be bypassed to VSS by a capacitor mounted close to the device pins. input Input to the on-chip inverter used with a 1MHz Xtal or external clock source. Controls 8 on-chip latches. It is used to latch RX / TX , PTL, and D0D5. 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 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 V DD. 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 V DD. 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. 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. Data input D1 (Parallel Mode). Internally pulled to VDD. Data input D0 (Parallel Mode). Internally pulled to VDD. 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 Output of the on-chip inverter (clock output). input
LOAD/LATCH
5
D5 / SERIAL ENABLE 1
input
6
D4 / SERIAL ENABLE 2
input
7
D3 / SERIAL DATA IN
input
8
D2 / SERIAL CLOCK
input
9 10 11 12
D1 D0 VSS DECODE COMPARATOR REF.
input input input
power Negative supply.
13
RX TONE DECODE
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.
14 15
DECODE COMPARATOR IN RX TONE DETECT
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). 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). 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.
16
TX TONE OUT
17
RX / TX
(c) 1997 MX*COM Inc.
www.mxcom.com Tele: 800 638-5577 910 744-5050
Fax: 910 744-5054
Doc. # 20480102.008
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.
Low Voltage CTCSS Encoder/Decoder
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MX165C
Pin No. 18 PTL
Signal
Type input
Description 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 V DD/2. 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 output Output of an internally generated VDD /2 bias level that would normally be externally bypassed to VSS via capacitor C6. 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. 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
20
TX AUDIO OUT
21 22
VBIAS TX AUDIO IN
23 24
RX AUDIO IN TONE INPUT
input input
(c) 1997 MX*COM Inc.
www.mxcom.com Tele: 800 638-5577 910 744-5050
Fax: 910 744-5054
Doc. # 20480102.008
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.
Low Voltage CTCSS Encoder/Decoder
6
MX165C
External Components
VDD C1 C2 C3 X1 R1 VDD XTAL/CLK XTAL
1 2 3 4 5 6 7 8 9 10 11 12
24 23 22 21 20
TONE IN RX AUDIO IN TX AUDIO IN VBIAS TX AUDIO OUT RX AUDIO OUT PTL RX / TX TONE OUT RX TONE DETECT
C4 C5 C10 C6 C11 C7
LOAD / LATCH D5/SERIAL ENABLE 1 D4/SERIAL ENABLE 2 D3/SERIAL DATA IN D2/SERIAL CLOCK D1 D0 VSS DECODE COMPARATOR REF.
MX165C
19 18 17 16 15 14 13
C8 R2 R3 D1 C9
DECODE COMPARATOR IN RX TONE DECODE
Figure 2 : Recommended External Components for Typical Application R1 R2 R3 C1 C2 C3 C4 C5 Note 1 Note 1 Note 2 Note 2 Note 1 4.7M 560k 820k 0.1F 18pF 33pF 0.1F 0.1F 10% 10% 10% 20% 20% 20% 20% 20% C6 C7 C8 C9 C10 C11 D1 X1 Note 1 Note 2 Note 2 Note 2 Note 2 Note 2 0.47F 0.1F 0.1F 0.1F 0.1F 0.1F small signal 1MHz 100ppm max. 20% 20% 20% 20% 20% 20%
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.
(c) 1997 MX*COM Inc.
www.mxcom.com Tele: 800 638-5577 910 744-5050
Fax: 910 744-5054
Doc. # 20480102.008
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.
Low Voltage CTCSS Encoder/Decoder
7
MX165C
General Description
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 MX165C 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 MX165C 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).
I/O Conditions
D0-D5 Input Pins Condition Tone 0 0 X 0 1 No Tone 0 X X 0 1 Tone 1 0 0 0 1 Tone 1 1 0 0 1 Tone 1 X 1 1 0 No Tone 1 X X X 0
RX / TX
PTL Decode Comparator In Output Pins Condition RX TONE DETECT RX TONE DECODE Result / Function Tone Transmitter Enabled TX Audio Path Enabled Tone Decode Enabled RX Audio Path Enabled Notes Notes: 1. Normal tone transmit condition.
Yes Yes No No (Bias) 1
No (Bias) Yes No No (Bias) 2
No (Bias) No Yes No (Bias) 3
No (Bias) No Yes Yes 4
No (Bias) No Yes Yes 5
No (Bias) No Yes Yes 6
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
(c) 1997 MX*COM Inc.
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Fax: 910 744-5054
Doc. # 20480102.008
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Low Voltage CTCSS Encoder/Decoder
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MX165C
Filter Response
Gain (dB)
0 -10 -20 -30
-33
CTCSS Frequencies
Voiceband Frequencies
-40 -50 -60 -70 100 200
250.3
300
400
Frequency (Hz)
Figure 3 : Voiceband Filter Response
Serial and Parallel Mode Timing
D0-D5 RX/TX, PTL
tSP tL
LOAD/LATCH
Figure 4 : Parallel Mode
(c) 1997 MX*COM Inc.
www.mxcom.com Tele: 800 638-5577 910 744-5050
Fax: 910 744-5054
Doc. # 20480102.008
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Low Voltage CTCSS Encoder/Decoder
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MX165C
1 D5 SERIAL ENABLE 0 1 D4 0 DATA (Note) 1 0 t1 DATA D5 DATA D4 D3 RX/TX PTL D3 tSS tH tC 0 tL LOAD/ LATCH LOAD DATA L/L LATCH DATA DON'T CARE DON'T CARE - 1M PULL UP - 1M PULL UP DATA LATCHED D1 D0 t2 D2
SERIAL CLOCK
DON'T CARE
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
(c) 1997 MX*COM Inc.
www.mxcom.com Tele: 800 638-5577 910 744-5050
Fax: 910 744-5054
Doc. # 20480102.008
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.
Low Voltage CTCSS Encoder/Decoder
10
MX165C
CTCSS Programming
Tone Nominal Frequency (Hz) 67.0 69.3 71.9 74.4 77.0 79.7 82.5 85.4 88.5 91.5 94.8 97.4 100.0 103.5 107.2 110.9 114.8 118.8 123.0 127.3 131.8 136.5 141.3 146.2 151.4 156.7 * 159.8 162.2 167.9 173.8 179.9 * * * * * 183.5 186.2 189.9 192.8 196.6 199.5 203.5 206.5 210.7 218.1 225.7
(c) 1997 MX*COM Inc.
Programming Inputs f0 (%) -0.029 0.024 0.001 0.042 -0.046 -0.029 -0.021 -0.020 -0.007 -0.048 -0.042 -0.036 -0.040 -0.069 -0.05 0.049 0.035 -0.006 0.023 0.022 -0.095 0.082 0.016 -0.107 0.027 0.112 0.085 0.069 -0.114 0.078 -0.137 0.098 0.048 0.089 0.033 -0.138 -0.094 0.071 -0.142 0.070 -0.113 -0.160 D5 1 1 0 1 0 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 1 0 1 1 0 1 0 0 0 D4 1 1 1 1 0 1 1 1 0 1 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 1 0 1 1 1 1 0 1 1 0 1 D3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 D2 1 0 1 1 1 1 1 1 1 0 1 0 1 1 1 0 0 0 0 0 0 0 0 1 1 1 0 1 1 1 1 0 1 0 0 1 1 0 1 0 0 0 D1 1 0 1 1 1 0 1 0 1 1 0 1 0 0 0 1 1 1 1 0 0 0 0 1 1 1 0 1 0 0 0 1 0 1 1 0 0 1 1 1 1 0 D0 1 1 1 0 1 1 0 0 0 1 1 0 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 1 0 0 0 1 1 0 1 1 0 0 0 1 Hex 3F 39 1F 3E 0F 3D 1E 3C 0E 3B 1D 3A 0D 1C 0C 1B 0B 1A 0A 19 09 18 08 17 07 16 31 06 15 05 14 32 04 33 13 34 35 03 36 12 02 11
MX165C Frequency (Hz) 66.98 69.32 71.901 74.431 76.965 79.677 82.483 85.383 88.494 91.456 94.76 97.435 99.96 103.429 107.147 110.954 114.84 118.793 123.028 127.328 131.674 136.612 141.323 146.044 151.441 156.875 159.936 162.311 167.708 173.936 179.654 183.680 186.289 190.069 192.864 196.329 199.312 203.645 206.207 210.848 217.853 225.339
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Low Voltage CTCSS Encoder/Decoder
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MX165C
Tone Nominal Frequency (Hz) * 229.1 233.6 241.8 250.3 * 254.1 Notone Serial input mode * Not specified in the TIA/EIA tone set Table 4: CTCSS Tones MX165C Frequency (Hz) 229.279 233.359 241.970 250.282 254.162 f0 (%) 0.078 -0.103 0.070 -0.007 0.024 N/A N/A D5 1 0 0 0 1 1 1 D4 1 0 1 0 1 1 0
Programming Inputs D3 0 0 0 0 1 0 Data D2 1 0 0 0 0 0 Clock D1 1 0 0 0 0 0 X D0 1 1 0 0 0 0 X Hex 37 01 10 00 38 30 2X
Performance Specification
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 Supply (VDD - VSS) Voltage on any pin to VSS Current VDD VSS any other pins TN / DW / LH / DIP Package Total Allowable Power Dissipation at TAMB =25C Derating above 25C Storage Temperature Operating temperature -55 - 40 800 10 125 85 mW mW/C above 25C C C -30 -30 -20 30 30 20 mA mA mA Min. -0.3 -0.3 Max. 7.0 VDD + 0.3 Units V V
Operating Limits Correct operation of the device outside these limits is not implied Min. Supply (VDD - VSS) Xtal Frequency Operating Temperature 2.7 1.0 -40 Max. 5.5 1.0 85 Units V MHz C
(c) 1997 MX*COM Inc.
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Doc. # 20480102.008
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Low Voltage CTCSS Encoder/Decoder
12
MX165C
Operating Characteristics For the following conditions unless otherwise specified VDD = 3.3V / 5.0V at TAMB = 25C, VSS = 0V, Xtal Frequency = 1.0 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 Static Values Supply voltage Supply current VDD = 5.0V VDD = 3.3V Rx Monitor Analog input impedance Analog output impedance Digital Input impedance Input logic 1 Input logic 0 Output Logic 1 source = 0.1mA Output Logic 0 sink = 0.1mA Dynamic Values Speech filter Total harmonic distortion Output noise level (input ac short circuit, audio switch enabled) Sinad Spurious emissions Cutoff frequency Bandpass ripple Stopband attenuation <250Hz Passband gain 1kHz TX/RX isolation Encoder Tone output level Tone Frequency Accuracy (f error) Risetime to 90% nominal output f0>100Hz f0<100Hz Total Harmonic Distortion 4,10 4,10 19 15 45 1.5 75 120 2 ms ms % 12 -1.0 - 0.3 0 1.0 0.3 dB %f0 5 8 7,8,19 33 - 0.5 5,8,19 8,18 8,9 18 300 1 36 0 60 0.5 1.8 40 0.7 0.5 50 - 48 1.5 1.0 % mVRMS dB dB Hz dB dB dB dB 18 18 1,18 1 1 2 2 80%VDD 20%VDD 25 70%VDD 30%VDD 480 3.2 1.1 2.0 550 400 40 1000 4.2 1.6 mA mA mA k k V V V V 2.7 3.3/5.0 5.5 V Min. Typ. Max. Units
(c) 1997 MX*COM Inc.
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Doc. # 20480102.008
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Low Voltage CTCSS Encoder/Decoder
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MX165C
Notes Decoder Pure tone decode threshold Composite signal decode threshold Decode input signal level Pure tone decode response time Pure tone decode deresponse time Decode response time Deresponse time Decode selectivity: Upper decode band edge Lower decode band edge Serial / Parallel Inputs Parallel Set Up Time (tSP) Load / Latch Pulse Width (tL) Serial Clock Pulse Width (tC) Serial Data Set-Up Time (tSS) Serial Data Hold Time (tH) Serial Enable Time (t1) Serial Load / Latch Set-Up Time (t2) Serial Clock Frequency 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. 3,11,19,20 3,11,19,20 19 3 16 13,14 13,15 3,6,10 3,10
Min.
Typ. 7
Max. 15 30 3.5
Units mVRMS mVRMS dB ms ms ms ms Hz Hz ns ns ns ns ns ns ns
-20 95 95 115 130 180 1.005f0 1.005f0-1 400 400 400 400 400 400 400 1 1.015f0 0.985f0
140 170 250 250 0.995f0+1 0.995f0
MHz
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. 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.
(c) 1997 MX*COM Inc.
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Fax: 910 744-5054
Doc. # 20480102.008
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Low Voltage CTCSS Encoder/Decoder
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MX165C
19. Batch sampled only 20. For example, if: f0 = 100.0Hz (f0-1 = 97.4Hz f0+1 = 103.5Hz) Decode Selectivity Upper Decode Band Edge Lower Decode Band Edge Min 100.5 97.89 Typ 101.5 98.5 Max 102.98 99.5 Unit Hz Hz
Packaging
A
A B C E H J L P T Y
Package Tolerances
DIM. MIN. TYP. MAX.
ALTERNATIVE PIN LOCATION MARKING
B
E L
PIN 1 Y C H J P
T
0.303 (7.70) 0.311 (7.90) 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) 0.020 (0.50) 0.030 (0.75) 0.0256 (0.65) 0.003 (0.08) 0.008 (0.20) 0 8
NOTE : All dimensions in inches (mm.) Angles are in degrees
Figure 6: 24-pin TSSOP Mechanical Outline: Order as part no. MX165CTN
Package Tolerances
A Z B E W L PIN 1 X Y CK H J P T
DIM. A B C E H J K L P T W X Y Z MIN.
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)
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)
ALTERNATIVE PIN LOCATION MARKING
0.050 (1.27) 0.016 (0.41) 0.050 (1.27) 0.009 (0.23) 45 0 5 5 10 7 0.0125 (0.32)
NOTE : All dimensions in inches (mm.) Angles are in degrees
Figure 7: 24-pin SOIC Mechanical Outline: Order as part no. MX165CDW
(c) 1997 MX*COM Inc.
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Fax: 910 744-5054
Doc. # 20480102.008
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Low Voltage CTCSS Encoder/Decoder
15
MX165C
E B Y DA
W
C K J W T H
Package Tolerances
DIM. A B C D E F G H J K P T W Y MIN. TYP. MAX.
0.380 (9.61) 0.409 (10.40) 0.380 (9.61) 0.409 (10.40) 0.128 (3.25) 0.146 (3.70) 0.417 (10.60) 0.435 (11.05) 0.417 (10.60) 0.435 (11.05) 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) 0.049 (1.24) 0.051 (1.30) 0.006 (0.152) 0.009 (0.22) 45 30 6
PIN 1 P
G F
NOTE : All dimensions in inches (mm.) Angles are in degrees
Figure 8: 24-pin PLCC Mechanical Outline: Order as part no. MX165CLH
A
Package Tolerances
DIM. A B C E E1 H J J1 K L P T Y MIN. TYP. MAX.
1.200 (30.48) 1.270 (32.26) 0.500 (12.70) 0.555 (14.04) 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
B
E1
Y
E
PIN1
T
K H L J J1 P
C
Figure 9: 24-pin PDIP Mechanical Outline: Order as part no. MX165CP
(c) 1997 MX*COM Inc.
www.mxcom.com Tele: 800 638-5577 910 744-5050
Fax: 910 744-5054
Doc. # 20480102.008
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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