MX224P [CMLMICRO]
Variable Split Band Inverter; 可变分割带逆变器
| 型号： | MX224P |
| 厂家： | 
CML MICROCIRCUITS |
| 描述： | Variable Split Band Inverter |
| 文件： | 总17页 (文件大小：234K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DATA BULLETIN
Variable Split Band
Inverter
MX214/224
Features
Applications
ꢁ CTCSS Highpass Filter
ꢁ Good Recovered Audio Quality
ꢁ Fixed and Rolling Code Modes
ꢁ Mobile Radio Voice Security
ꢁ Cellular Telephone Voice
Security
ꢁ Serial (MX214) and Parallel (MX224)
Loading Options
ꢁ 32 Programmable Split Points
ꢁ Half-Duplex Capability
POWERSAVE
LOAD / LATCH
XTAL / CLOCK
1MHz
SERIAL CLOCK
INPUT LATCHES
XTAL
OSC
ENABLE / MUTE
EN / MUTE
CLEAR / SCRAMBLE
Rx / Tx
CLEAR / SCRAMBLE
Rx / Tx (SER / PAR)
1MHz
A0
V
A1
A2
A3
A4
DD
CLOCK
DIVIDER
CLOCK
DIVIDER
ROM
V
BIAS
V
SS
CK
B
CK
B
PS
CK
A
F
F
CLOCK
SWITCHING
C1 C2
Rx / Tx
(SERIAL DATA IN)
CK
3
CK4
CK
B
PS EN Tx
EN PS Rx
Rx
Rx
Rx IN
Tx OUT
PS + EN Tx
CTCSS
CK
3
Rx
PS
MUTE
F
C2
BIAS
BIAS
BIAS
Tx
C
5
SCRAMBLE
FILTER 3
FILTER 4
CK
PS MUTE Rx
Rx OUT
Tx PS
Tx PS
4
Σ
F
C1
Rx
Rx
Tx
Tx
Rx
BIAS
CK
4
Tx IN
CLEAR
FILTER 1
FILTER 2
CK
Tx
PS
A
BIAS
BIAS
BIAS
CK
A
PS + EN Rx
C6
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.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
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.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
3
MX214/224
1.
Block Diagram
POWERSAVE
XTAL / CLOCK
XTAL
LOAD / LATCH
SERIAL CLOCK
ENABLE / MUTE
1MHz
OSC
INPUT LATCHES
EN / MUTE
CLEAR / SCRAMBLE
CLEAR / SCRAMBLE
Rx / Tx (SER / PAR)
1MHz
Rx / Tx
A0
V
A1
A2
A3
A4
DD
CLOCK
DIVIDER
CLOCK
DIVIDER
ROM
V
BIAS
V
SS
CK
B
CK
B
PS
CK
A
F
F
CLOCK
SWITCHING
C1 C2
Rx / Tx
(SERIAL DATA IN)
CK
3
CK4
CK
B
PS EN Tx
EN PS Rx
Rx
Rx
Rx IN
Tx OUT
PS + EN Tx
CTCSS
CK
3
Rx
PS
MUTE
F
C2
BIAS
BIAS
BIAS
Tx
C
5
SCRAMBLE
FILTER 3
FILTER 4
CK
PS MUTE Rx
Rx OUT
Tx PS
Tx PS
4
Σ
F
C1
Rx
Rx
Tx
Tx
Rx
BIAS
CK
4
Tx IN
CLEAR
FILTER 1
FILTER 2
CK
Tx
PS
A
BIAS
BIAS
BIAS
CK
A
PS + EN Rx
C6
Figure 1: Block Diagram
ꢀ1998 MX-COM, Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
4
MX214/224
2.
Signal List
MX214
Pin No.
J/P LH
MX224
Pin No.
Signal Name
Description
J/P
LH
7
1
1
2
1
2
Xtal/Clock
Input to the clock oscillator inverter. A 1MHz crystal
input or externally derived 1MHz clock is injected
here.
8
9
2
3
Output of the clock oscillator inverter.
Xtal
Serial Data Input
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.
3 – A4 3 – A4 Programming
4 – A3 4 – A3 Inputs
5 – A2 5 – A2
6 – A1 6 – A1
7 – A0 7 – A0
In parallel mode, these five digital inputs define the
split point frequency. Each of the 5 input pins has a
1Mꢂ internal pull-up resistor. See Table 4 for
programming information.
8
8
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. 1Mꢂ internal pull-up resistor
(Rx).
Rx /Tx
13
8
This pin must be connected to V for serial loading.
Parallel/Serial
Clear/Scramble
SS
Internal 1Mꢂ pull-up resistor.
9
9
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).
10
10
Enable/Mute
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. 1Mꢂ Internal pull-up resistor
(Enable)
14
10
Serial Clock
Input
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. 1Mꢂ
Internal pull-up resistor.
ꢀ1998 MX-COM, Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
5
MX214/224
MX214
Pin No.
MX224
Pin No.
J/P LH
Signal Name
Description
J/P
LH
15
11
11
11
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
Load/Latch
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 1Mꢂ pull-up
resistor (Load). See Figure 8.
16
12
12
12
Powersave
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 1Mꢂ pull-up resistor.
17
13
13
13
V
SS
Negative supply (GND)
18
19
14
15
14
15
14
15
Internal connection
Rx Output
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.
20
16
16
16
Tx Output
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.
21
22
17
18
17
18
17
18
V
Normally at V /2, this pin requires an external
DD
BIAS
decoupling capacitor (C7) to V
.
SS
Rx Input
This is the analog received signal input. This pin is
held at a DC ‘bias’ voltage by a 300kꢂ 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.
1
19
19
19
Highband Filter
Output
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.
ꢀ1998 MX-COM, Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
6
MX214/224
MX214
Pin No.
MX224
Pin No.
J/P LH
Signal Name
Description
J/P
LH
2
3
4
20
21
22
20
21
22
20
21
22
Highband Balanced
Modulator Input
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.
Lowband Balanced
Modulator Input
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.
Tx input
This analog ‘Clear’ audio input for the VSB
Scrambler. This pin is held at a DC ‘bias’ voltage by
a 300kꢂ 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.
5
6
23
24
23
24
23
24
Lowband Filter
Output
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.
V
DD
A single 5.0V supply is required.
No Connection
10,
11,
12
4, 5, 6, N/C
7, 9
Table 1: Signal List
MUTE = 0
Disabled
Bias
POWERSAVE
Disabled
Rx/Tx = 1
Enabled
Bias
Rx/Tx = 0
Disabled
Bias
Rx Path
Rx Out Level
Tx Path
High Impedance
Disabled
Disabled
Bias
Enabled
Bias
Disabled
Bias
Tx Out Level
High impedance
Table 2: Functions Influencing Signal Paths
ꢀ1998 MX-COM, Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
7
MX214/224
3.
External Components
VDD
C5
C6
C3
Rx IN
VBIAS
1 (19)
2 (20)
3 (21)
4 (22)
5 (23)
6 (24)
7 (1)
8 (2)
9 (3)
10
(18) 22
(17) 21
(16) 20
(15) 19
(14) 18
(13) 17
(12) 16
(11) 15
(10) 14
C7
Tx OUT
Rx OUT
C4
Tx IN
VDD
C8
N/C
VSS
Around Through
Load/Latch
Serial Clock In
Parallel/Serial
N/C
Xtal/Clock
Xtal
Xtal/Clock
Serial Data In
N/C
(8)
13
12
X1
R1
N/C
11
R2
C1
Xtal
VSS
MX214P, MX214J
(MX214LH)
C2
VSS
Figure 2: Recommended External Components ‘MX214 Serial Loading’
VDD
VDD
Xtal/Clock
Xtal
1
2
24
23
22
21
20
19
18
17
16
15
14
13
C6
C4
C3
A4
Tx IN
3
A3
A2
4
Programming
Inputs
5
C5
A1
A0
6
Rx IN
VBIAS
7
C8
Rx/Tx
Xtal/Clock
8
Clear/Scramble
Enable/Mute
Tx OUT
Rx OUT
N/C
9
X1
R1
10
11
12
Load/Latch
R2
C1
Xtal
C7
VSS
Around/Through
C2
VSS
MX224P, MX224J
(MX224LH)
Figure 3: Recommended External Components 'MX224 Parallel Loading'
ꢀ1998 MX-COM, Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
8
MX214/224
Component
Notes
Value
1.0Mꢂ
Selectable
33pF
Tolerance
R1
R2
C1
C2
C3
C4
C5
C6
C7
C8
X1
±10%
±20%
±20%
±20%
±20%
±20%
±20%
±20%
±20%
68pF
15nF
15nF
1
1
1.0µF
1.0µF
1.0µF
1.0µF
1MHz
2
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 V , peak to peak. Tuning fork crystals generally cannot meet this requirement. To
DD
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.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
9
MX214/224
5.
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
Low Band
Carrier, Hz
High Band
Carrier, Hz
ROM
Address
A4-A0
Split Point
Hz
Low Band
Carrier, Hz
High Band
Carrier, Hz
f
f
f
f
C1
C2
C1
C2
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
3105
2923
2777
2631
2512
2403
2304
2212
2127
2049
1984
1858
1748
1655
1572
1501
6172
6024
5813
5681
5555
5494
5376
5263
5208
5102
5050
4950
4807
4716
4629
4587
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
1436
1351
1278
1213
1157
1094
1037
988
4504
4424
4347
4310
4273
4166
4132
4065
4032
3968
3937
3906
3846
3816
3787
3731
936
891
853
813
772
728
688
650
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
Amplitude
Control
Pre-emphasis
MX214
Tx
Rx
MX214
De-emphasis
Flat Amplitude
Channel
300-3400Hz
Frequency
Inverter
Frequency
Inverter
(Optional)
(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.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
10
MX214/224
Amplitude
Pre-emphasis
(Additional)
MX214
De-emphasis Pre-emphasis Tx
Rx
MX214
De-emphasis
(Fitted)
Control
Flat Amplitude
Channel
300-3400Hz
Frequency
Inverter
(Additional)
(Fitted)
Frequency
Inverter
(Optional)
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
CK4
CKB
FILTER 4
FILTER 3
3400Hz
2700Hz
CLEAR
SCRAMBLE
3400Hz
3400Hz
Tx OUT
Tx IN
PS
Σ
CTCSS
300Hz
2900Hz
2900Hz
SCRAMBLE
CLEAR
2600Hz
2600Hz
CLEAR
PS + ENABLE Tx
BIAS
FILTER 1
CKA
FILTER 2
CKA
BIAS
SCRAMBLE
BIAS
C6
FC1
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
C5
FC2
CK4
CKB
CK4
FILTER 3
FILTER 4
3400Hz
3400Hz
CLEAR
SCRAMBLE
3400Hz
2700Hz
Rx OUT
Rx IN
PS
CTCSS
300Hz
Σ
2600Hz
2600Hz
SCRAMBLE
CLEAR
2900Hz
2900Hz
PS + ENABLE Tx
CLEAR
Rx MUTE
FILTER 2
CKA
FILTER 1
CKA
BIAS
BIAS BIAS
BIAS
SCRAMBLE
C6
FC1
Figure 7: Basic Rx Path
ꢀ1998 MX-COM, Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
11
MX214/224
6.
Performance Specifications
6.1
Electrical Specifications
6.1.1 Absolute Maximum Limits
Exceeding these maximum ratings can result in damage to the device.
General
Supply (V -V
Notes
Min.
Typ.
Max.
Units
)
-0.3
7.0
V
DD SS
Voltage on any pin to V
Current
-0.3
V
DD
+ 0.3
V
SS
V
-30
-30
-20
30
30
20
mA
mA
mA
DD
SS
V
Any other pin
P/LH Packages
Total allowable Power dissipation
at T = 25ꢃC
800
mW
AMB
10
10
Derating above 25ꢃC
Operating Temperature
Storage Temperature
J Package
mW/ꢃC above 25ꢃC
-30
-40
70
85
ꢃC
ꢃC
Total allowable Power dissipation
800
mW
at T
= 25ꢃC
AMB
Derating above 25ꢃC
Operating Temperature
Storage Temperature
mW/ꢃC above 25ꢃC
-30
-55
85
ꢃC
ꢃC
125
6.1.2 Operating Limits
Correct Operation of the device outside these limits is not implied.
Min.
Typ.
Max.
Units
Supply (V -V
)
4.5
5.0
5.5
V
DD SS
Operating Temperature (P/LH)
Operating Temperature (J)
Xtal Frequency
-30
-30
70
85
ꢃC
ꢃC
1.0
MHz
ꢀ1998 MX-COM, Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
12
MX214/224
6.1.3 Operating Characteristics
For the following conditions unless otherwise specified.
= 5.0V @ T = 25ꢃC
V
DD
AMB
Audio Level 0dB ref. = 775mV , Xtal/Clock Frequency = 1.0MHz
RMS
Notes Min.
4.5
Typ.
Max.
Units
Static Values
Voltage
5.0
5.5
V
Current
Enabled
8
mA
mA
Powersave
1.2
Analog Input Impedances
Tx/Rx Input (Enabled)
Tx/Rx Input (Powersave)
Balanced Modulator
100
40
kꢂ
Mꢂ
kꢂ
1
Analog Output Impedances
Rx Output (Tx Mode)
Rx Output (Rx Mode)
Rx Output (Powersave)
Tx Output (Tx Mode)
100
kꢂ
kꢂ
Mꢂ
kꢂ
kꢂ
Mꢂ
kꢂ
2
2
1
1
Tx Output (Rx Mode)
Tx Output (Powersave)
Input LPF
100
1
Digital Values
Digital Input Impedance
Dynamic Values
100
3.5
kꢂ
Input Logic ‘1’
V
V
Input logic ‘0’
1.5
6
Xtal/Clock Frequency
Analog Input Level
1
MHz
dB
dB
dB
dB
dB
-18
Carrier Breakthrough
Baseband Breakthrough
Filter Clock Breakthrough
Output Noise
1
-55
-33
-50
-45
1, 2, 3
1, 2, 3
1, 4
Passband Characteristics
Clear Mode
7
Passband Gain
0
dB
Hz
Hz
Output Lower 3dB Point (Rx or Tx)
Output Upper 3dB Point (Rx or Tx)
Scramble-Descramble
Received Signal Passband Gain
Received Signal Lower 3dB Point
Received Signal Upper 3dB Point
Transmitted Signal Lower 3dB Point
Transmitted Signal Upper 3dB Point
300
3400
5
6
0
dB
Hz
Hz
Hz
Hz
400
2700
300
3400
ꢀ1998 MX-COM, Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
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
0
Hz
dB
dB
Passband gain
Stopband Attenuation at f < 250Hz
40
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 V
.
SS
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 ꢄ150Hz.
7. Measured at the Rx or Tx output pin of a single source.
ꢀ1998 MX-COM, Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
14
MX214/224
6.1.4 Timing
Timing
Notes Min.
Typ.
Max. Units
Serial Mode
t
Serial Mode Enable Set-Up
250
250
250
150
50
ns
ns
ns
ns
ns
ns
ns
SMS
t
Serial Clock ‘High’ Pulse Width
Serial Clock ‘Low’ Pulse Width
Data Set Up Time
PWH
t
PWL
t
DS
t
Data Hold Time
DHS
t
250
150
Load/Latch Set Up Time
Load/Latch Pulse Width
LL
t
LLW
Parallel Mode
t
150
150
20
ns
ns
ns
Load/Latch Pulse Width
Data Set Up Time
Data Hold Time
LLW
t
DSP
DHP
t
Table 5: Serial and Parallel Timing
Serial Loading
PARALLEL / SERIAL
tSMS
tPWH
SERIAL
CLOCK
tDS
tPWL
tDHS
SERIAL
DATA INPUT
2nd bit
1st bit
3rd bit
Rx / Tx
8th bit
A4
ENABLE
CLEAR
tLL
LOAD / LATCH
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.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
15
MX214/224
6.2
Packages
Package Tolerances
A
DIM.
MIN.
TYP.
MAX.
A
B
C
E
1.060 (26.92)
0.376 (9.55)
0.165 (4.19)
0.466 (11.84)
1.080 (27.43)
0.384 (9.75)
0.230 (5.84)
0.515 (13.08)
0.418 (10.62)
E1
E
B
E1 0.408 (10.36)
F
H
J
J1
K
1.000 (25.40)
0.020 (0.51)
0.018 (0.46)
0.055 (1.40)
T
PIN1
K
0.058 (1.47)
0.080 (2.03)
0.080 (2.03)
0.171 (4.34)
C
K1
K1 0.075 (1.91)
H
L
L
P
T
0.115 (2.92)
0.100 (2.54)
0.0098 (0.249)
0.0102 (0.259)
P
J1
F
J
NOTE : All dimensions in inches (mm.)
Angles are in degrees
Figure 9: 22-pin CDIP Mechanical Outline: Order as part no. MX214J or MX224J
Package Tolerances
A
DIM.
MIN.
TYP.
MAX.
A
B
C
E
1.080 (27.43)
0.330 (8.38)
1.100 (27.94)
0.360 (9.14)
B
E1
E
Y
0.185 (4.70)
0.420 (10.67)
0.480 (12.19)
0.420 (10.67)
0.045 (1.14)
0.020 (0.51)
0.065 (1.65)
T
E1 0.390 (9.91)
H
J
PIN 1
0.020 (0.51)
0.015 (0.38)
J1 0.040 (1.02)
K
L
P
0.066 (1.68)
K
0.128 (3.25)
C
0.100 (2.54)
0.010 (0.25)
H
L
T
Y
7°
NOTE : All dimensions in inches (mm.)
Angles are in degrees
J1
P
J
Figure 10: 22-pin PDIP Mechanical Outline: Order as part no. MX214P or MX224P
ꢀ1998 MX-COM, Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480112.002
All trademarks and service marks are held by their respective companies.
Variable Split Band Inverter
16
MX214/224
E
B
C
Package Tolerances
K
DIM.
A
MIN.
TYP.
MAX.
Y
0.380 (9.61)
0.380 (9.61)
0.128 (3.25)
0.417 (10.60)
0.417 (10.60)
0.409 (10.40)
0.409 (10.40)
0.146 (3.70)
0.435 (11.05)
0.435 (11.05)
D A
B
J
C
D
E
W
W
H
F
0.250 (6.35)
0.250 (6.35)
0.023 (0.58)
T
PIN 1
G
H
J
K
P
T
W
Y
0.018 (0.45)
0.047 (1.19)
0.049 (1.24)
0.022 (0.55)
0.048 (1.22)
0.051 (1.30)
0.009 (0.22)
P
F
0.006 (0.152)
30°
45°
6°
G
NOTE : All dimensions in inches (mm.)
Angles are in degrees
Figure 11: 24-pin PLCC Mechanical Outline: Order as part no. MX214LH or MX224LH
ꢀ1998 MX-COM, Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
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
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