FX469P6 Consumer Microcircuits Limited, FX469P6 Datasheet

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FX469P6

Manufacturer Part Number
FX469P6
Description
Manufacturer
Consumer Microcircuits Limited
Datasheet

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Part Number:
FX469P6
Manufacturer:
CML
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Part Number:
FX469P6
Manufacturer:
CML
Quantity:
3 085
Features
Brief Description
Brief Description
Brief Description
Brief Description
Brief Description
The FX469 is a single-chip CMOS LSI circuit which
operates as a full-duplex pin-selectable 1200, 2400 or
4800 baud FFSK Modem. The mark and space
frequencies are 1200/1800, 1200/2400 and 2400/4800
Hz respectively. Tone frequencies are phase
continuous; transitions occur at the zero crossing point.
two clock frequencies (1.008MHz or 4.032MHz) to
provide baud-rate, transmit frequencies, and Rx and Tx
synchronization, the transmitter and receiver operate
entirely independently including individual section
powersave functions.
The FX469 includes on chip circuitry for Carrier Detect
and Rx Clock recovery, both of which are made
available as output pins.
Fig.1 Functional Block Diagram
Employing a common Xtal oscillator with a choice of
Selectable Data Rates
1200, 2400 and 4800 Baud
Full-Duplex FFSK
Rx and Tx Bandpass Filters
Clock Recovery and Carrier
Detect Facilities
Rx and Tx Enable Functions
Tx DATA I/P
Tx ENABLE
CLOCK RATE
XTAL/CLOCK
XTAL
1200/2400 BAUD SELECT
Rx ENABLE
Rx SIGNAL I/P
4800 BAUD SELECT
Tx GENERATOR
NOISE FILTER
Rx FILTER
OSCILLATOR
CLOCK
Tx FILTER
RECTIFIER
RECTIFIER
LIMITER
CML Semiconductor Products
PRODUCT INFORMATION
FX469
DIVIDER
RETRIGGERABLE
MONOSTABLE
COMPARATOR
f
.. n
S/N
CARRIER DETECT TIME CONSTANT
DIGITAL
DIGITAL
FILTER
PLL
1200/2400/4800 Baud
FFSK Modem
1
FILTER
LATCH
DATA
DATA
bandpass filter to ensure the provision of optimum
signal conditions both in the modem and for the Tx
modulation circuitry.
good bit-error-rate under adverse signal conditions;
the carrier detect time constant is set by an external
capacitor, whose value should be arranged as
required to further enhance this product's performance
in high noise environments.
components and is available in small outline plastic
(S.O.I.C) and cerdip DIL packages.
Rx, Tx and Carrier Detect paths each contain a
The FX469 demonstrates a high sensitivity and
This low-power device requires few external
Pin Selected Xtal/Clock Inputs
1.008MHz or 4.032MHz
Radio and General Applications
Data-Over-Radio
PMR and Cellular Signalling
Portable Data Terminals
Personal/Cordless Telephone
LIMITER
CARRIER DETECT O/P
Publication D/469/6 April 1998
BANDPASS O/P
Tx SIGNAL O/P
Rx SYNC O/P
Tx SYNC O/P
UNCLOCKED
CLOCKED
DATA O/P
DATA O/P
V
V
V
DD
BIAS
SS
FX469

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FX469P6 Summary of contents

Page 1

CML Semiconductor Products PRODUCT INFORMATION FX469 Features Selectable Data Rates 1200, 2400 and 4800 Baud Full-Duplex FFSK Rx and Tx Bandpass Filters Clock Recovery and Carrier Detect Facilities Rx and Tx Enable Functions Tx GENERATOR Tx FILTER Tx DATA I/P ...

Page 2

Pin Number Function FX469 DW LG/LS J/ Xtal/Clock : The input to the on-chip inverter, for use with either a 1.008MHz or a 4.032MHz Xtal or external clock. Clock frequency selection is by the “Clock Rate” input ...

Page 3

Pin Number Function FX469 DW LG/LS J/ Unclocked Data O/P: The recovered asynchronous serial data output from the receiver Clocked Data O/P: The recovered synchronous serial data output from the receiver. Data is latched ...

Page 4

Application Information XTAL/CLOCK SYNC O SIGNAL O/P Tx DATA I/P Tx ENABLE V DD BANDPASS O ENABLE Component Value R 1.0MW 1 C 33.0pF 1 ...

Page 5

Application Inf Application Inf ormation ...... ormation ...... Application Information ...... Application Inf Application Inf ormation ...... ormation ...... Tx ENABLE Tx SYNC Don’t Care Tx DATA DV = Data Valid OPEN CIRCUIT 1200 BAUD Tx OUTPUT ...

Page 6

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 Input voltage at any pin (ref V = 0V) SS Sink/source current (supply pins) ...

Page 7

Specification ...... Characteristics Transmitter Output Tx Output Level Output Level Variation 1200/1800Hz or 1200/2400Hz or 2400/4800Hz Output Distortion 3rd Harmonic Distortion Logic ‘1’ Carrier Frequency 2400 Baud 4800 Baud Logic ‘0’ Carrier Frequency 2400 Baud 4800 Baud Isochronous Distortion 1200Hz ...

Page 8

Application Information IDEAL COHERENT FFSK - Fig.7 Rx Bit-Error-Rate vs Signal-to-Noise Ratio Package Outlines The FX469 is available in the package styles ...

Page 9

... CML reserves the right at any time without notice to change the said circuitry. FX469LS FX469LS FX469LS FX469LS FX469LS 24-lead plastic leaded chip ( NOT TO SCALE 10.25mm 10.25mm FX469P6 22-pin plastic DIL FX469P6 FX469P6 FX469P6 FX469P6 NOT TO SCALE Max. Body Length 10.40mm Max. Body Width 10.40mm Max ...

Page 10

... 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. ...

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