Consumer Microcircuits Limited FX365ALS, FX365ALG, FX365AJ, FX365ADW Datasheet

PRODUCT INFORMATION

CML Semiconductor Products

FX365A

CTCSS Encoder/Decoder

Publication No. D/365A/F/2 Feb 1992

Advance Information

Features

Improved Audio and Noise
Performance

39 Programmable Sub-Audio
Tones + NOTONE

Sub-Audio Frequency Range

67.0Hz to 250.3Hz

Reduced Current Requirement in
Rx Monitoring Mode

Pin and Function Compatible
with FX365 Microcircuits

High Voiceband/CTCSS Isolation

-70
100 200 300 400 500 600

700 800 900 1000

-60

-50

-40

-30

-20

-10

0

Frequency (Hz)

Gain (dB)

Voiceband FrequenciesCTCSS Frequencies

-33

250.3

FX365A Voiceband Filter Response

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 voice­band 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 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

151.4 156.7 162.2 167.9 173.8 179.9 186.2 192.8

203.5 210.7 218.1 225.7 233.6 241.8 250.3 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 D

0

D

1

D

2

D

3

D

4

D

5

Freq. (Hz)

69.3 100111

Specification

Absolute Maximum Ratings

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 f0 = 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 See Note Min. Typ. Max. Unit
Static Values

Supply Voltage 4.5 5.0 5.5 V
Supply Current (Tx) – 3.5 – mA

(Rx) – 3.5 – mA
(Rx Monitor) 1 – 2.5 – mA

Audio Filter

Passband Frequencies 300 3000 Hz
Passband Gain

at 1.0kHz – 0 – dB
w.r.t. 1.0kHz -2.0 – 0.5 dB

Stopband

Frequencies – – 250 Hz

Attenuation 33.0 36.0 - dB
Output Noise (a.c. short circuit) 2 – -54.0 -48.0 dB
SINAD 3 36.0 40.0 – dB
Tx Output Impedance – 2.0 – kΩ
Tx Output Amplitude – 950 – mVrms
Spurious Emissions – – -48.0 dB

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.

CONSUMER MICROCIRCUITS LIMITED

 1992 Consumer Microcircuits Limited

Telephone: [phone]
Telex: 99382 CMICRO G
Telefax [phone]

1 WHEATON ROAD
WITHAM - ESSEX CM8 3TD - ENGLAND

Ordering Information

FX365A DW 24-pin surface mount S.O.I.C.
FX365A J 24-pin cerdip DIL
FX365A LG 24-pin quad plastic

encapsulated bent and
cropped

FX365A LS 24-lead plastic leaded chip

carrier

H

J

L

PIN 1

A

B

C

K

D

F

E

G

M

N

ALTERNATIVE

PIN

LOCATION

MARKING

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.

DIMENSION MIN TYP MAX

A 15.16 15.60
B 7.39 7.59
C 2.21 2.67
D 0.20
E 0.40
F 1.27
G 0.66
H 10.11 10.51
J 0.63
K 45°
L 5°
M 0.25
N 0.76

FX365A DW S.O.I.C. Package