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ST7540 Datasheet

FSK power line transceiver

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ST7540
FSK power line transceiver
General features
Half-duplex frequency shift keying (FSK)
transceiver
Integrated power line driver with programmable
voltage and current control
Programmable mains access:
– Synchronous
– Asynchronous
Single supply voltage (from 7.5V up to 13.5V)
Very low power consumption (Iq = 5mA)
Integrates 5V voltage regulator (up to 50mA)
with short circuit protection
Integrated 3.3V voltage regulator (up to 50mA)
with short circuit protection
3.3V or 5V digital supply
8 Programmable transmission frequencies
Programmable baud rate up to 4800BPS
Receiving sensitivity up to 250µVRMS
Suitable for applications in accordance with EN
50065 Cenelec specification
Carrier or preamble detection
Band in use detection
Programmable control register
Watchdog timer
8 or 16 Bit header recognition
ST7537 and ST7538 compatible
UART/SPI host interface
HTSSOP28 Exposed Pad
Description
The ST7540 is a Half Duplex
synchronous/asynchronous FSK Modem
designed for power line communication network
applications. It operates from a single supply
voltage and integrates a line driver and two linear
regulators for 5V and 3.3V. The device operation
is controlled by means of an internal register,
programmable through the synchronous serial
interface. Additional functions as watchdog, clock
output, output voltage and current control,
preamble detection, time-out and band in use are
included. Realized in Multipower BCD5
technology that allows to integrate DMOS, Bipolar
and CMOS structures in the same chip.
Order codes
Part number
ST7540
ST7540TR
Package
HTSSOP28 (Exposed Pad)
HTSSOP28 (Exposed Pad)
Packaging
Tube
Tape and reel
September 2006
Rev 2
1/44
www.st.com
44
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STMicroelectronics Electronic Components Datasheet

ST7540 Datasheet

FSK power line transceiver

No Preview Available !

www.DataSheet4U.com
Contents
Contents
ST7540
1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.3 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5 Crystal resonator and external clock . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.1 Carrier frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.2 Baud rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.3 Mark and space frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.4 ST7540 Mains access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.5 Host processor interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.5.1 Communication between Host and ST7540 . . . . . . . . . . . . . . . . . . . . . 20
6.5.2 Control register access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.6 Receiving mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.7 Transmission mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.8 Control register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
2/44
DataSheet4 U .com


Part Number ST7540
Description FSK power line transceiver
Maker ST Microelectronics
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ST7540 Datasheet PDF






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