CML Semiconductor Products
PRODUCT INFORMATION
FX365A
Features
Improved Audio and Noise
Performance
39 Programmable Sub-Audio
Tones + N
OTONE
Sub-Audio Frequency Range
67.0Hz to 250.3Hz
Gain (dB)
0
-10
-20
-30
-40
-50
-60
-70
100
200
250.3
-33
CTCSS Encoder/Decoder
Publication No. D/365A/F/2 Feb 1992
Advance Information
Reduced Current Requirement in
Rx Monitoring Mode
Pin and Function Compatible
with FX365 Microcircuits
High Voiceband/CTCSS Isolation
CTCSS Frequencies
Voiceband Frequencies
300
400
500
600
700
800 900 1000
FX365A Voiceband Filter Response
Frequency (Hz)
Brief Description
The FX365A is a half-duplex
µProcessor
controlled
CTCSS Encoder and Decoder with integral voice-band
filtering.
This device which is pin and function compatible
with standard FX365 microcircuits is also available in a
24pin plastic Small Outline (S.O.I.C.) [365A DW] SMD
package. The FX365A demonstrates improved voice-
band noise performance and requires less supply
current in the Rx monitoring mode.
The FX365A has the capability of encoding and
decoding 39 separate sub-audio tones, 38 of which are
detailed in the current FX365 Data Sheet, plus an
additional tone of 69.3Hz.
This Data Sheet, which details the differences
between the
FX365A
and the FX365 microcircuits,
should be used with the current
FX365
Data Sheet.
Programmable Sub-Audio Rx and Tx Frequencies (Hz)
67.0
88.5
114.8
151.4
203.5
69.3
91.5
118.8
156.7
210.7
71.9
94.8
123.0
162.2
218.1
74.4
97.4
127.3
167.9
225.7
77.0
100.0
131.8
173.8
233.6
79.7
103.5
136.5
179.9
241.8
82.5
107.2
141.3
186.2
250.3
85.4
110.9
146.2
192.8
N
OTONE
FX365A Tx and Rx Sub-Audio Frequencies
69.3Hz Tone Generation
The additional sub-audio tone provided by the
FX365A is 69.3Hz.
With reference to the FX365 Data Sheet –
Table 3, the programming information is as follows:
Nominal
Freq. (Hz)
69.3
D
0
1
D
1
0
D
2
0
D
3
1
D
4
1
D
5
1
Specification
Exceeding the maximum rating can result in device damage. Operation of the device outside the operating limits is not
implied.
Supply voltage
-0.3 to 7.0V
Input voltage at any pin (ref V
SS
= 0V)
-0.3 to (V
DD
+ 0.3V)
Sink/source current (supply pins)
+/- 30mA
(other pins)
+/- 20mA
Total device dissipation @ T
AMB
25°C
800mW Max.
Derating
10mW/°C
Operating temperature range:
FX365A J
-40°C to +85°C
(cerdip)
FX365A DW/LG/LS
-40°C to +85°C
(plastic)
Storage temperature range:
FX365A J
-55°C to +125°C (cerdip)
FX365A DW/LG/LS
-40°C to +85°C
(plastic)
Operating Limits
All device characteristics are measured under the following conditions unless otherwise specified:
V
DD
= 5.0V. T
AMB
= 25°C. Xtal/Clock f
0
= 1.0MHz. Audio level 0dB ref: = 300mV rms
Composite Signal Content =
1.0kHz tone at 0dB, Noise at -12dB (gaussian white noise band-limited to 6.0kHz),
Programmed CTCSS tone at -20dB.
Characteristics
Static Values
Supply Voltage
Supply Current
See Note
Min.
4.5
–
–
–
Typ.
5.0
3.5
3.5
2.5
Max.
5.5
–
–
–
3000
0
–
–
36.0
-54.0
40.0
2.0
950
–
–
0.5
250
-
-48.0
–
–
–
-48.0
Unit
V
mA
mA
mA
Hz
dB
dB
Hz
dB
dB
dB
k
Ω
mVrms
dB
Absolute Maximum Ratings
(Tx)
(Rx)
(Rx Monitor)
1
Audio Filter
Passband Frequencies
300
Passband Gain
at 1.0kHz
–
w.r.t. 1.0kHz
-2.0
Stopband
Frequencies
–
Attenuation
33.0
Output Noise (a.c. short circuit)
2
–
SINAD
3
36.0
Tx Output Impedance
–
Tx Output Amplitude
–
Spurious Emissions
–
Notes
1 See FX365 Data Sheet Table 2.
2. Measured in a 30kHz bandwidth.
3. With an input level of 308mVrms at 1.0kHz, in a 30kHz bandwidth.
A
Ordering Information
FX365A DW
24-pin surface mount S.O.I.C.
24-pin cerdip DIL
24-pin quad plastic
encapsulated bent and
cropped
24-lead plastic leaded chip
carrier
MIN
15.16
7.39
2.21
0.20
0.40
1.27
0.66
10.11
0.63
45°
5°
0.25
0.76
10.51
TYP
MAX
15.60
7.59
2.67
ALTERNATIVE
PIN
LOCATION
MARKING
B
J
H
FX365A J
FX365A LG
K
PIN 1
N
M
L
C
F
E
G
D
FX365A LS
DIMENSION
A
B
C
D
E
F
G
H
J
K
L
M
N
FX365A DW S.O.I.C. Package
CML does not assume any responsibility for the use of any circuitry described. No circuit patent licences are implied
and CML reserves the right at any time without notice to change the said circuitry.
CONSUMER MICROCIRCUITS LIMITED
1 WHEATON ROAD
WITHAM - ESSEX CM8 3TD - ENGLAND
Telephone: (0376) 513833
Telex: 99382 CMICRO G
Telefax (0376) 518247
©
1992 Consumer Microcircuits Limited
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