CMLMICRO MX214

DATA BULLETIN
Variable Split Band
Inverter
MX214/224
Features
Applications
CTCSS Highpass Filter
Good Recovered Audio Quality
Fixed and Rolling Code Modes
Serial (MX214) and Parallel (MX224)
Loading Options
32 Programmable Split Points
Half-Duplex Capability
Mobile Radio Voice Security
Cellular Telephone Voice
Security
POWERSAVE
XTAL / CLOCK
LOAD / LATCH
SERIAL CLOCK
1MHz
OSC
INPUT LATCHES
ENABLE / MUTE
CLEAR / SCRAMBLE
EN / MUTE
CLEAR / SCRAMBLE
Rx / Tx (SER / PAR)
Rx / Tx
XTAL
1MHz
A0
VDD
A1
CLOCK
DIVIDER
ROM
A2
CLOCK
DIVIDER
VBIAS
VSS
A3
CKB CKB
A4
CKA FC1 FC2 PS
CK3
CK4
(SERIAL DATA IN)
CKB
EN ⋅ PS ⋅ Rx
CLOCK
SWITCHING
Rx / Tx
PS ⋅ EN ⋅ Tx
Rx
Rx IN
BIAS
Rx
PS + EN ⋅ Tx
FC2
BIAS
Tx ⋅ PS
Tx OUT
CTCSS
CK3
Rx
MUTE
PS
FILTER 3
FILTER 4
SCRAMBLE
CK4
Tx ⋅ PS
Rx
FC1
Rx
Tx
Tx IN
FILTER 1
Tx
PS
BIAS
BIAS
Tx
C5
Tx
FILTER 2
CKA
PS ⋅ MUTE ⋅ Rx
Rx OUT
Σ
CK4
BIAS
CLEAR
Rx
BIAS
BIAS
CKA
C6
PS + EN ⋅ Rx
The MX214/224 Variable Split Band Inverters are designed for mobile and cellular radio voice security
applications. Digital control functions are loaded serially into the MX214. The MX224 is loaded in parallel.
The MX214/224 ICs include a highpass filter that rejects subaudio frequencies, ensuring full CTCSS
compatibility. This CTCSS filter is not included on the earlier generation MX204 VSB Inverter.
The MX214/224 splits the voiceband (300-2700Hz) into upper and lower subbands, and inverts each subband
about itself. The ‘split point’ (defined as the frequency where the voice band is subdivided), is externally
programmable to 32 distinct values in the 300 to 3000Hz range. In the ‘fixed code’ mode, a single point is
used. Fixed mode operation nets approximately 4 mutually exclusive secure channels.
In ‘rolling code’ mode, the split point is changed many times per second, usually under control of a
microprocessor. Rolling code scrambling requires synchronization, offers higher security than fixed code
operation, and provides a much greater number of mutually exclusive secure channels.
The MX214/224 offers a recovered audio product close to that of a telephone. The on-chip ‘ Mute’ function is
useful when implementing rolling code continuous synchronization schemes. ‘Powersave’ and
‘Clear/Scramble’ controls are also included on-chip. Timing and filter clocks are derived internally from an
on-chip 1MHz reference oscillator driven by a 1MHz crystal or clock pulse input.
The MX214 and the MX224 operate from a single 5.0V supply and available in the following packges:
22-pin CDIP (MX214J/MX224J), 22-pin PDIP (MX214P/MX224P), and 24-pin PLCC (MX214LH/MX224LH).
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. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
2
MX214/224
Contents
Section
Page
1. Block Diagram................................................................................................................ 3
2. Signal List....................................................................................................................... 4
3. External Components.................................................................................................... 7
4. General Description....................................................................................................... 8
5. Application ..................................................................................................................... 9
5.1 Audio Quality .......................................................................................................................... 9
6. Performance Specifications........................................................................................ 11
6.1 Electrical Specifications........................................................................................................ 11
6.1.1
Absolute Maximum Limits ....................................................................................................... 11
6.1.2
Operating Limits...................................................................................................................... 11
6.1.3
Operating Characteristics ....................................................................................................... 12
6.1.4
Timing ..................................................................................................................................... 14
6.2 Packages.............................................................................................................................. 15
MX-COM, Inc. reserves the right to change specifications at any time 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. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
1.
3
MX214/224
Block Diagram
POWERSAVE
XTAL / CLOCK
LOAD / LATCH
SERIAL CLOCK
1MHz
OSC
INPUT LATCHES
ENABLE / MUTE
CLEAR / SCRAMBLE
EN / MUTE
CLEAR / SCRAMBLE
Rx / Tx (SER / PAR)
Rx / Tx
XTAL
1MHz
A0
VDD
A1
CLOCK
DIVIDER
ROM
A2
CLOCK
DIVIDER
VBIAS
VSS
A3
CKB CKB
A4
CKA FC1 FC2 PS
CK3
CK4
(SERIAL DATA IN)
CKB
EN ⋅ PS ⋅ Rx
CLOCK
SWITCHING
Rx / Tx
PS ⋅ EN ⋅ Tx
Rx
Rx IN
BIAS
Rx
PS + EN ⋅ Tx
FC2
BIAS
Tx ⋅ PS
Tx OUT
CTCSS
CK3
Rx
MUTE
PS
FILTER 3
C5
FILTER 4
SCRAMBLE
Σ
CK4
Tx ⋅ PS
Rx
FC1
Rx
Tx
Tx IN
FILTER 1
PS
BIAS
BIAS
Tx
Tx
Tx
FILTER 2
CKA
CK4
PS ⋅ MUTE ⋅ Rx
Rx OUT
BIAS
CLEAR
Rx
BIAS
BIAS
CKA
PS + EN ⋅ Rx
C6
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. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
2.
4
Signal List
MX214
Pin No.
J/P
LH
7
1
MX224
Pin No.
J/P
LH
1
1
Xtal/Clock
8
2
2
Xtal
9
3
14
2
Signal Name
Serial Data Input
3 – A4
4 – A3
5 – A2
6 – A1
7 – A0
8
13
MX214/224
3 – A4
4 – A3
5 – A2
6 – A1
7 – A0
8
8
Programming
Inputs
Rx / Tx
Parallel / Serial
9
9
Clear/Scramble
10
10
Enable/Mute
10
1998 MX-COM, Inc.
Serial Clock
Input
Description
Input to the clock oscillator inverter. A 1MHz crystal
input or externally derived 1MHz clock is injected
here.
Output of the clock oscillator inverter.
This pin is used to input an 8-bit word representing
the digital control functions. This word is loaded
using the serial data clock and in input in the
following sequence: MUTE, CLEAR, Rx / Tx , A0,
A1, A2, A3, A4. The Load / Latch is operated on the
completion. Reference the timing diagram in Figure
8.
In parallel mode, these five digital inputs define the
split point frequency. Each of the 5 input pins has a
1M internal pull-up resistor. See Table 4 for
programming information.
This digital input selects the Receive and Transmit
paths and configures upperband and lowerband
filter bandwidths while setting the CTCSS highpass
filter position on the signal path. See Table 2,
Figure 6, and Figure 7. 1M internal pull-up resistor
(Rx).
This pin must be connected to VSS for serial loading.
Internal 1M pull-up resistor.
This digital input puts the device into ‘Clear’ or
‘Scramble’ mode by controlling the application of
carrier frequency to the Upper and Lower band
balanced modulators. In ‘Scramble’ mode, the
balanced modulator carrier frequency values are
selected by the split point address A0-A4. See
Table 4. In ‘Clear’ mode, the carriers are disabled
and the balanced modulators are bypassed
internally, i.e. the lower band signal is not added to
the output signal. 1MHz internal pull-up resistor
(Clear).
This digital function is used to disable the Receive or
the Transmit signal paths for rolling code
synchronization while maintaining bias conditions.
Synchronization data can be transmitted during the
Mute periods, as is done in the MX1204 VSB
Scrambler Module. 1M Internal pull-up resistor
(Enable)
This is the externally applied data clock frequency
used to shift input data along in devices wired in the
Serial-loading mode. One full data clock cycle is
required to shift one data bit completely into the
register. See Timing Diagram Figure 8. 1M
Internal pull-up resistor.
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. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
5
MX214
Pin No.
J/P
LH
15
11
MX224
Pin No.
J/P
LH
11
11
Load / Latch
16
12
12
12
Powersave
17
13
13
13
VSS
18
19
14
15
14
15
14
15
Internal connection
Rx Output
20
16
16
16
Tx Output
21
17
17
17
VBIAS
22
18
18
18
Rx Input
1
19
19
19
Highband Filter
Output
1998 MX-COM, Inc.
Signal Name
MX214/224
Description
This pin controls the loading of the 8 digital function
inputs (ENABLE, CLEAR, A0-A4) into the internal
register. When this pin is at a logic ‘1’, all eight
inputs are transparent and new data acts directly.
For controlled changing of parameters in the
parallel, Load / Latch must be kept at logic ‘0’ while
a new function is loaded, then strobed 0-1-0 to latch
the inputs in. For serial loading, the serial data
should be loaded with the Load / Latch at logic ‘0’
and then the Load / Latch strobed 0-1-0 on
completion of data loading. Internal 1M pull-up
resistor (Load). See Figure 8.
This digital input is used to place the MX214/224
into Powersave mode where all parts of the device
except the 1MHz oscillator are shut down. All signal
input and output lines are made open circuit, free of
all bias. This allows signal paths to be routed
externally around the device, while reducing current
consumption. A logic ‘0’ at this input enables the
device to work normally as shown in Table 2.
Internal 1M pull-up resistor.
Negative supply (GND)
This pin is internally connected. Leave open circuit.
This is the processed received audio signal output.
This pin is held at a DC ‘bias’ voltage for all
functions except Powersave. This buffered output is
driven by the summing circuit in the Rx mode.
Signal paths and bias levels are detailed in Table 2
and Figure 7.
This is the processed audio output for the
transmission channel. This pin is held at a DC ‘bias’
voltage for all functions except Powersave. This
summed and buffered signal is passed through the
CTCSS high pass Filter to the output pin in the Tx
Mode. Signal paths and bias levels are detailed in
Table 2 and Figure 6.
Normally at VDD/2, this pin requires an external
decoupling capacitor (C7) to VSS.
This is the analog received signal input. This pin is
held at a DC ‘bias’ voltage by a 300k on-chip bias
resistor, which is selected for all functions except
Powersave. It must be connected to external
circuitry by capacitor C3. See Figure 2 and Figure
3. This input is routed through the CTCSS High
Pass Filter in Rx mode to remove subaudio
frequencies from the voiceband. Signal paths and
bias levels are detailed in Table 2 and Figure 7.
The output of the Input Filter of the Upperband limit.
The Rx / Tx functions sets the lowpass filter at
3400Hz or 2700Hz respectively. This output must
be connected to the Highband Balanced modulator
input via capacitor C5. See Figure 2 and Figure 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. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
6
MX214/224
MX214
Pin No.
J/P
LH
2
20
MX224
Pin No.
J/P
LH
20
20
3
21
21
21
Lowband Balanced
Modulator Input
4
22
22
22
Tx input
5
23
23
23
Lowband Filter
Output
6
24
24
24
VDD
The input to the Balanced Modulator of the
Upperband limit. This input must be connected to
the Highband Filter Output via capacitor C5. See
Figure 2 and Figure 3.
The input to the Balanced Modulator of the
Lowerband limit. This input must be connected to
the Lowband Filter Output via capacitor C6. See
Figure 2 and Figure 3.
This analog ‘Clear’ audio input for the VSB
Scrambler. This pin is held at a DC ‘bias’ voltage by
a 300k on-chip bias resistor, which is selected for
all functions except powersave. In must be
connected to external circuitry by capacitor C4. See
Figure 2 and Figure 3. This input, in Tx mode, is
connected to Upper and Lowerband input filters.
Signal paths and bias levels are detailed in Table 2
and Figure 6.
The output of the Input filter of the lowerband limit.
The Rx / Tx function determines which filter is used
(Filter 1 or 2). See Figure 6 and Figure 7. This
output must be connected to the Lowband balanced
modulator input via capacitor C6. See Figure 7.
A single 5.0V supply is required.
4, 5, 6,
7, 9
N/C
No Connection
10,
11,
12
Signal Name
Description
Highband Balanced
Modulator Input
Table 1: Signal List
Rx Path
Rx Out Level
Tx Path
Tx Out Level
Rx/ Tx = 1
Rx/ Tx = 0
MUTE = 0
POWERSAVE
Enabled
Disabled
Disabled
Disabled
Bias
Bias
Bias
High Impedance
Disabled
Enabled
Disabled
Disabled
Bias
Bias
Bias
High impedance
Table 2: Functions Influencing Signal Paths
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. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
3.
7
MX214/224
External Components
VDD
C5
C6
C4
Tx IN
VDD
Xtal/Clock
R2
C2
(18) 22
C3
Rx IN
VBIAS
2 (20)
(17) 21
3 (21)
(16) 20
Tx OUT
4 (22)
(15) 19
Rx OUT
5 (23)
(14) 18
N/C
VSS
C7
C8
6 (24)
(13) 17
Xtal/Clock
7 (1)
(12) 16
Xtal
8 (2)
(11) 15
Serial Data In
9 (3)
(10) 14
Serial Clock In
Parallel/Serial
R1
X1
1 (19)
N/C
10
(8) 13
N/C
11
12
Xtal
Around Through
Load/Latch
N/C
VSS
MX214P, MX214J
(MX214LH)
C1
VSS
Figure 2: Recommended External Components ‘MX214 Serial Loading’
VDD
Xtal/Clock
Xtal
A4
Programming
Inputs
A3
A2
A1
A0
Xtal/Clock
X1
R1
R2
C2
Xtal
1
24
2
23
3
22
4
21
5
20
6
19
7
18
VDD
C6
C5
Rx IN
8
17
Clear/Scramble
9
16
Tx OUT
Enable/Mute
10
15
Rx OUT
Load/Latch
11
14
N/C
Around/Through
12
13
VSS
C3
C8
VBIAS
Rx/Tx
C1
C4
Tx IN
VSS
C7
MX224P, MX224J
(MX224LH)
Figure 3: Recommended External Components 'MX224 Parallel Loading'
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. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
8
Component
Notes
MX214/224
Value
Tolerance
R1
1.0M
±10%
R2
Selectable
C1
33pF
±20%
C2
68pF
±20%
C3
15nF
±20%
C4
15nF
±20%
C5
1
1.0µF
±20%
C6
1
1.0µF
±20%
1.0µF
±20%
1.0µF
±20%
C7
C8
X1
2
1MHz
Table 3: Recommended External Components
Notes:
1. C5 and C6 are coupling capacitors between filter outputs and balanced modulator inputs.
2. 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.
4.
General Description
The MX214/224 Variable Split Band Inverters are designed for mobile and cellular radio voice security
applications. Digital control functions are loaded serially into the MX214. The MX224 is loaded in parallel.
The MX214/224 ICs include a highpass filter that rejects subaudio frequencies, ensuring full CTCSS
compatibility. This CTCSS filter is not included on the earlier generation MX204 VSB Inverter.
The MX214/224 splits the voiceband (300-2700Hz) into upper and lower subbands, and inverts each subband
about itself. The ‘split point’ (defined as the frequency where the voice band is subdivided), is externally
programmable to 32 distinct values in the 300 to 3000Hz range. In the ‘fixed code’ mode, a single point is
used. Fixed mode operation nets approximately 4 mutually exclusive secure channels.
In ‘rolling code’ mode, the split point is changed many times per second, usually under control of a
microprocessor. Rolling code scrambling requires synchronization, offers higher security than fixed code
operation, and provides a much greater number of mutually exclusive secure channels.
The MX214/224 offers a recovered audio product close to that of a telephone. The on-chip ‘ Mute’ function is
useful when implementing rolling code continuous synchronization schemes. ‘Powersave’ and
‘Clear/Scramble’ controls are also included on-chip. Timing and filter clocks are derived internally from an
on-chip 1MHz reference oscillator driven by a 1MHz crystal or clock pulse input.
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. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
5.
9
MX214/224
Application
The MX214 represents both the MX214 and the MX224 throughout this section.
Recommended external components are shown in Figure 2 and Figure 3. In ‘Scramble’ mode, split point
frequencies are selected and set in accordance with the ROM address code present at the inputs A0-A4. See
Table 4. In ‘Clear’ mode, both upper and Lowerband filter limits are used (see Figure 6 and Figure 7), the
carrier frequencies are turned off, and the balanced modulators are bypassed internally. The Lowband audio
is removed from the output signal prior to summing.
ROM
Address
A4-A0
Split Point
Hz
00000
00001
00010
00011
00100
00101
00110
00111
01000
01001
01010
01011
01100
01101
01110
01111
2800
2625
2470
2333
2210
2100
2000
1909
1826
1750
1680
1555
1448
1354
1272
1200
Low Band
Carrier, Hz
fC1
3105
2923
2777
2631
2512
2403
2304
2212
2127
2049
1984
1858
1748
1655
1572
1501
High Band
Carrier, Hz
fC2
6172
6024
5813
5681
5555
5494
5376
5263
5208
5102
5050
4950
4807
4716
4629
4587
ROM
Address
A4-A0
Split Point
Hz
10000
10001
10010
10011
10100
10101
10110
10111
11000
11001
11010
11011
11100
11101
11110
11111
1135
1050
976
913
857
792
736
688
636
591
552
512
471
428
388
350
Low Band
Carrier, Hz
fC1
1436
1351
1278
1213
1157
1094
1037
988
936
891
853
813
772
728
688
650
High Band
Carrier, Hz
fC2
4504
4424
4347
4310
4273
4166
4132
4065
4032
3968
3937
3906
3846
3816
3787
3731
Table 4: ROM Address Programming
The MUTE function disables the MX214/224’s audio outputs to allow periodic transmission of synchronization
data. A logic ‘0’ at this input isolates the device while leaving the audio input and output ins at bias level (See
Table 2). When the MX21/224 is in Powersave mode, audio signals may be hardwired around the device
since the input and output pins are open circuit. See Table 2.
5.1
Audio Quality
Figure 4 shows the recommended basic audio system layout using pre- and de-emphasis circuitry to maintain
good recovered speech quality. The Transmit mode, Do Not pre-emphasize the audio output of the MX214.
In the Receive mode, de-emphasis should be used after the MX214.
Amplitude
Control
Pre-emphasis
MX214
Tx
Rx
Flat Amplitude
Channel
300-3400Hz
Frequency
Inverter
(Optional)
MX214
De-emphasis
Frequency
Inverter
Amplitude
Control
(Optional)
Figure 4: Recommended Basic Communication Audio System Layout
Figure 5 shows the recommended basic audio system layout if it is necessary to install the MX214 within a
radio having pre- and de-emphasis circuitry as a standard. This is where post-emphasis access is not
possible in the transmitter.
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. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
10
Pre-emphasis
MX214
De-emphasis
Pre-emphasis
(Additional)
Frequency
Inverter
(Additional)
(Fitted)
MX214/224
MX214
De-emphasis
Amplitude
Control
Frequency
Inverter
(Fitted)
(Optional)
Tx
Rx
Flat Amplitude
Channel
300-3400Hz
Figure 5: Recommended Basic Radio Communication Audio System Layout.
During the Transmit function the low pass and CTCSS filters are configured automatically as shown in Figure
6, with cut-off frequencies (-3dB) indicated.
CK3
C5
FC2
CK3
FILTER 4
3400Hz
2700Hz
CK4
FILTER 3
3400Hz
3400Hz
CLEAR
SCRAMBLE
Σ
Tx IN
2900Hz
2900Hz
PS
2600Hz
2600Hz
SCRAMBLE
CLEAR
CKB
Tx OUT
CTCSS
300Hz
PS + ENABLE ⋅ Tx
CLEAR
BIAS
FILTER 1
FILTER 2
BIAS
CKA
C6
FC1
CKA
BIAS
SCRAMBLE
Figure 6: Basic Tx Path
During the Receive function the Low Pass and CTCSS filters are configured automatically as shown in Figure
7, with cut-off frequencies (-3dB) indicated.
CK3
CKB
FC2
FILTER 3
3400Hz
3400Hz
Rx IN
C5
CK4
CK4
FILTER 4
CLEAR
SCRAMBLE
3400Hz
2700Hz
Σ
CTCSS
2600Hz
2600Hz
300Hz
SCRAMBLE
CLEAR
2900Hz
2900Hz
PS + ENABLE ⋅ Tx
Rx ⋅ MUTE
PS
CLEAR
FILTER 2
BIAS
Rx OUT
FILTER 1
BIAS
BIAS
BIAS
CKA
C6
FC1
CKA
SCRAMBLE
Figure 7: Basic Rx Path
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. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
11
6.
Performance Specifications
6.1
Electrical Specifications
6.1.1
Absolute Maximum Limits
MX214/224
Exceeding these maximum ratings can result in damage to the device.
General
Notes
Min.
Typ.
Max.
Units
Supply (VDD-VSS)
-0.3
7.0
V
Voltage on any pin to VSS
-0.3
VDD + 0.3
V
VDD
-30
30
mA
VSS
-30
30
mA
Any other pin
-20
20
mA
800
mW
Current
P/LH Packages
Total allowable Power dissipation
at TAMB = 25C
10
Derating above 25C
mW/C above 25C
Operating Temperature
-30
70
C
Storage Temperature
-40
85
C
800
mW
J Package
Total allowable Power dissipation
at TAMB = 25C
10
Derating above 25C
mW/C above 25C
Operating Temperature
-30
85
C
Storage Temperature
-55
125
C
6.1.2
Operating Limits
Correct Operation of the device outside these limits is not implied.
Min.
Typ.
Max.
Units
Supply (VDD-VSS)
4.5
5.0
5.5
V
Operating Temperature (P/LH)
-30
70
C
Operating Temperature (J)
-30
85
C
Xtal Frequency
1998 MX-COM, Inc.
1.0
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
MHz
Doc. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
6.1.3
12
MX214/224
Operating Characteristics
For the following conditions unless otherwise specified.
VDD = 5.0V @ TAMB = 25C
Audio Level 0dB ref. = 775mVRMS, Xtal/Clock Frequency = 1.0MHz
Notes
Min.
Typ.
Max.
Units
4.5
5.0
5.5
V
Static Values
Voltage
Current
Enabled
Powersave
8
mA
1.2
mA
100
k
Analog Input Impedances
Tx/Rx Input (Enabled)
Tx/Rx Input (Powersave)
1
Balanced Modulator
M
40
k
100
k
Analog Output Impedances
Rx Output (Tx Mode)
Rx Output (Rx Mode)
2
Rx Output (Powersave)
1
M
Tx Output (Tx Mode)
2
Tx Output (Rx Mode)
100
Tx Output (Powersave)
k
k
k
1
M
Input LPF
1
k
Digital Values
Digital Input Impedance
100
k
3.5
V
Dynamic Values
Input Logic ‘1’
Input logic ‘0’
1.5
Xtal/Clock Frequency
1
Analog Input Level
Carrier Breakthrough
-18
V
MHz
6
dB
1
-55
dB
Baseband Breakthrough
1, 2, 3
-33
dB
Filter Clock Breakthrough
1, 2, 3
-50
dB
1, 4
-45
dB
0
dB
300
Hz
3400
Hz
0
dB
Received Signal Lower 3dB Point
400
Hz
Received Signal Upper 3dB Point
2700
Hz
Transmitted Signal Lower 3dB Point
300
Hz
Transmitted Signal Upper 3dB Point
3400
Hz
Output Noise
Passband Characteristics
Clear Mode
7
Passband Gain
Output Lower 3dB Point (Rx or Tx)
Output Upper 3dB Point (Rx or Tx)
Scramble-Descramble
Received Signal Passband Gain
1998 MX-COM, Inc.
5
6
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. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
13
MX214/224
Notes
Min.
Typ.
Max.
Units
CTCSS (Highpass Filter)
-3dB Point
300
Hz
Passband gain
0
dB
Stopband Attenuation at f < 250Hz
40
dB
Operating Characteristics Notes:
1. Measured at the output of a single device.
2. Tx Mode.
3. Rx Mode.
4. With input AC short-circuited to VSS.
5. Measured at the output of a receiving device in a scrambler-descrambler system with a transmission
channel having a flat amplitude response and a bandwidth of 300Hz to 3400Hz and measured relative
to the input signal at the transmitting device.
6. Excluding split point 150Hz.
7. Measured at the Rx or Tx output pin of a single source.
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. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
6.1.4
14
MX214/224
Timing
Timing
Notes
Min.
Typ.
Max.
Units
Serial Mode
tSMS
Serial Mode Enable Set-Up
250
ns
tPWH
Serial Clock ‘High’ Pulse Width
250
ns
tPWL
Serial Clock ‘Low’ Pulse Width
250
ns
tDS
Data Set Up Time
150
ns
tDHS
Data Hold Time
50
ns
tLL
Load / Latch Set Up Time
250
ns
tLLW
Load / Latch Pulse Width
150
ns
tLLW
Load / Latch Pulse Width
150
ns
tDSP
Data Set Up Time
150
ns
tDHP
Data Hold Time
20
ns
Parallel Mode
Table 5: Serial and Parallel Timing
Serial Loading
PARALLEL / SERIAL
tSMS
tPWH
SERIAL
CLOCK
tDS
SERIAL
DATA INPUT
tPWL
tDHS
1st bit
2nd bit
ENABLE
CLEAR
8th bit
3rd bit
A4
Rx / Tx
LOAD / LATCH
tLL
tLLW
Parallel Loading
tLLW
LOAD / LATCH
tDSP
tDHP
PARALLEL
DATA INPUTS
NOTE: For 'Serial Load' devices the data loading sequence is: - Enable - Clear - Rx/Tx - A0 - A1 - A2 - A3 - A4
Figure 8: Loading Timing 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. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
6.2
15
MX214/224
Packages
Package Tolerances
A
E1
B
E
T
PIN1
K
K1 C
H
L
J
J1
P
DIM.
A
B
C
E
E1
F
H
J
J1
K
K1
L
P
T
MIN.
TYP.
MAX.
1.080 (27.43)
1.060 (26.92)
0.384 (9.75)
0.376 (9.55)
0.230 (5.84)
0.165 (4.19)
0.515 (13.08)
0.466 (11.84)
0.408 (10.36)
0.418 (10.62)
1.000 (25.40)
0.020 (0.51)
0.018 (0.46)
0.055 (1.40)
0.058 (1.47)
0.080 (2.03)
0.075 (1.91)
0.080 (2.03)
0.171 (4.34)
0.115 (2.92)
0.100 (2.54)
0.0098 (0.249)
0.0102 (0.259)
NOTE : All dimensions in inches (mm.)
Angles are in degrees
F
Figure 9: 22-pin CDIP Mechanical Outline: Order as part no. MX214J or MX224J
Package Tolerances
A
B
E1
E
Y
T
PIN 1
K
C
H
L
J
J1
P
DIM.
A
B
C
E
E1
H
J
J1
K
L
P
T
Y
MIN.
1.080 (27.43)
0.330 (8.38)
TYP.
MAX.
1.100 (27.94)
0.360 (9.14)
0.185 (4.70)
0.420 (10.67)
0.480 (12.19)
0.390 (9.91)
0.420 (10.67)
0.020 (0.51)
0.045 (1.14)
0.020 (0.51)
0.015 (0.38)
0.040 (1.02)
0.065 (1.65)
0.066 (1.68)
0.128 (3.25)
0.100 (2.54)
0.010 (0.25)
7°
NOTE : All dimensions in inches (mm.)
Angles are in degrees
Figure 10: 22-pin PDIP Mechanical Outline: Order as part no. MX214P or MX224P
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. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
16
E
B
C
Package Tolerances
K
Y
DA
W
J
W
T
PIN 1
P
G
MX214/224
H
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)
0.146 (3.70)
0.128 (3.25)
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)
30°
45°
6°
NOTE : All dimensions in inches (mm.)
Angles are in degrees
F
Figure 11: 24-pin PLCC Mechanical Outline: Order as part no. MX214LH or MX224LH
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. # 20480112.002
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
uk.sales@cmlmicro.com
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
us.sales@cmlmicro.com
www.cmlmicro.com
No 2 Kallang Pudding Road, 09-05/
06 Mactech Industrial Building,
Singapore 349307
Tel: +65 7450426
Fax: +65 7452917
sg.sales@cmlmicro.com
www.cmlmicro.com
D/CML (D)/2 May 2002