Overview
The ST7540TR, produced by STMicroelectronics, is a Half Duplex synchronous/asynchronous FSK (Frequency Shift Keying) Modem designed for power line communication network applications. It operates from a single supply voltage ranging from 7.5V to 13.5V and integrates a line driver along with two linear regulators for 5V and 3.3V. The device is controlled through an internal register, programmable via the synchronous serial interface. It is realized in Multipower BCD5 technology, allowing the integration of DMOS, Bipolar, and CMOS structures in the same chip.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Power Supply Voltage (VCC) | 7.5 to 13.5 | V |
| Digital Supply Voltage (VDD) | 4.75 to 5.25 | V |
| Operating Temperature | -40 to 85 | °C |
| Programmable Baud Rate | Up to 4800 BPS | |
| Programmable Transmission Frequencies | 8 frequencies | |
| Receiving Sensitivity | Up to 250µV RMS | |
| Integrated Voltage Regulators | 5V and 3.3V (up to 50mA each) with short circuit protection | |
| Power Consumption (Iq) | 5mA | |
| Package | HTSSOP28 (Exposed Pad) |
Key Features
- Half-duplex frequency shift keying (FSK) transceiver
- Integrated power line driver with programmable voltage and current control
- Programmable mains access: Synchronous and Asynchronous
- Very low power consumption (Iq = 5mA)
- 3.3V or 5V digital supply
- UART/SPI host interface
- Carrier or preamble detection
- Band in use detection
- Programmable control register
- Watchdog timer
- 8 or 16 Bit header recognition
- ST7537 and ST7538 compatible
Applications
The ST7540TR is suitable for various power line communication network applications, including those that need to comply with the EN 50065 Cenelec specification. It is particularly useful in industrial and smart home automation scenarios where reliable and efficient communication over power lines is required.
Q & A
- What is the primary function of the ST7540TR?
The ST7540TR is a Half Duplex synchronous/asynchronous FSK Modem designed for power line communication network applications.
- What is the operating voltage range of the ST7540TR?
The device operates from a single supply voltage ranging from 7.5V to 13.5V.
- What are the integrated voltage regulators in the ST7540TR?
The ST7540TR integrates 5V and 3.3V voltage regulators, each capable of supplying up to 50mA with short circuit protection.
- What is the maximum programmable baud rate of the ST7540TR?
The maximum programmable baud rate is up to 4800 BPS.
- How many programmable transmission frequencies does the ST7540TR support?
The ST7540TR supports 8 programmable transmission frequencies.
- What is the receiving sensitivity of the ST7540TR?
The receiving sensitivity is up to 250µV RMS.
- Does the ST7540TR have built-in watchdog functionality?
Yes, the ST7540TR includes a watchdog timer.
- What interfaces does the ST7540TR support for host communication?
The ST7540TR supports both UART and SPI host interfaces.
- Is the ST7540TR compliant with any specific standards?
Yes, it is suitable for applications in accordance with the EN 50065 Cenelec specification.
- What is the power consumption of the ST7540TR in idle mode?
The power consumption (Iq) is 5mA.
- What package type is the ST7540TR available in?
The ST7540TR is available in the HTSSOP28 (Exposed Pad) package.
