ST7540

Interface Type :
Minimum Operating Temperature : - 40 C
Mounting Style : SMD/SMT
Product : Modem Chip
Maximum Operating Temperature : + 85 C
Packaging : Tube
Supply Voltage - Max : 5.25 V, 13.5 V
Supply Voltage - Min : 4.75 V, 7.5 V
Supply Current : 3.5 mA, 54 mA
Package / Case : HTSSOP-28


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


Pinout




Specifications

Symbol	Parameter	Value	Unit
VCC	Power supply voltage	-0.3 to + 14	V
VDD	Digital supply voltage	-0.3 to +5.5	V
SVSS/GND	Voltage between SVSS and GND	-0.3 to +0.3	V
VI	Digital input voltage	GND - 0.3 to VDD +0.3	V
VO	Digital output voltage	GND - 0.3 to VDD +0.3	V
IO	Digital output current	-2 to +2	MA
Vsense, X2,PA_IN- ,PA_IN+, CL	Voltage range at Vsense, X2, PA_IN-, PA_IN+, CL Inputs	SVSS - 0.3 to 5.6	V
RX_IN	Voltage range at RX_IN input	-5.6 to 5.6	V
TX_OUT, X1	Voltage range at TX_OUT, X1 outputs	SVSS - 0.3 to 5.6	V
PA_OUT	Voltage range at powered PA_OUT Output	VSS - 0.3 to +VCC +0.3	V
I(PA_OUT)	Power line driver output current (1)	650	mArms
TA	Operating ambient temperature	-40 to +85
TSTG	Storage temperature	-50 to 150
RxD, PA_OUT Pin	Maximum withstanding voltage range Test condition: CDF-AEC-Q100-002- "Human Body Model" Acceptance criteria: "Normal Performance"	±1750	V
Other pins		±2000	V

1. This current is intended as not repetitive pulse current


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 ST7540 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.