STMicroelectronics ST7580TR

Overview

ST7580TR from STMicroelectronics is a fully integrated narrow-band power line networking system-on-chip (SoC) combining PHY processor, protocol controller, analog front-end (AFE), and 1 A RMS line driver in VFQFPN48 package. It supports B-FSK up to 9.6 kbps, B/Q/8-PSK up to 28.8 kbps, AES-128 security, and operates from -40 °C to +105 °C for EN50065/FCC/ARIB-compliant smart metering and street lighting control.

For engineers reviewing the ST7580TR datasheet, ST7580TR pinout, ST7580TR application, or ST7580TR equivalent, key selection criteria include dual-channel FSK/PSK modulation support, embedded turnkey firmware, integrated 1 A RMS power amplifier with thermal shutdown, zero-crossing detection, and programmable carrier frequency up to 250 kHz.

Technical Context

The ST7580TR implements a dual-core architecture: a dedicated PHY processor handling real-time signal processing (B-FSK/B-PSK/Q-PSK/8-PSK demodulation, SNR estimation, convolutional coding) and a protocol controller managing framing, error detection, sniffer mode, and AES-128 encryption. Its AFE includes PGA with -18 dB to +30 dB gain range, 8 MHz ADC/DAC, and automatic gain control.

The integrated power amplifier delivers up to 1 A RMS (14 V_p-p) into 50 Ω with THD ≤ 0.15%, HD2 ≤ -63 dBc, and HD3 ≤ -63 dBc, while configurable active filtering and current-sense feedback via CL pin enable compliance with CENELEC/FCC conducted emission limits. Zero-crossing detection on ZC_IN supports synchronous transmission timing.

Key Specifications

Pinout & Package

ST7580TR is housed in a VFQFPN48 (7 × 7 × 1.0 mm) package with exposed pad electrically connected to VSSA and thermally tied to PCB ground plane for enhanced thermal performance (R_thJA = 42–50 °C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar narrow-band power line SoC applications.

Compared with MAX2992 and TI PLC100, ST7580TR offers unique turnkey narrowband PLC functionality with embedded PHY+protocol+security in one die-reducing system-level design effort and bill-of-materials count while maintaining full EN50065/FCC compliance without external components.

Availability

ST7580TR is available at Aetrix Electronics and suitable for smart metering, street lighting control, and industrial building automation requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for regulatory-certified designs.

Supply support for ST7580TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, analog ICs, power management, and automotive-grade components.

The ST7580TR belongs to ST's Power Line Communication (PLC) SoC product line, engineered specifically to deliver single-chip, standards-compliant narrowband PLC solutions for utility, smart city, and industrial IoT applications where high integration, low EMI, and robust noise immunity are critical.

FAQ

What UART baud rates does ST7580TR support, and how are they selected?

ST7580TR supports four fixed UART baud rates: 9600, 19200, 38400, and 57600 bps. Selection is performed via BR0 and BR1 pins sampled at reset - logic levels 00, 01, 10, and 11 correspond respectively to each rate. The UART interface operates up to 57.6 kbps with ±1.5% tolerance and requires external pull-ups on TXD/TCK lines to VDDIO.

How does the ST7580TR handle impulsive noise on power lines?

ST7580TR combats impulsive noise using B-PSK with Pulse Noise Avoidance (PNA) mode, which dynamically shifts symbol timing away from expected noise peaks. Combined with convolutional error correction coding and SNR estimation, this enables reliable reception at BER = 10⁻³ even under high-noise conditions typical of street lighting and industrial environments.

What is the role of the CL pin, and how is current limiting implemented?

The CL pin senses power amplifier output current via an external resistor (R_CL). When voltage at CL exceeds 2.35 V threshold, the device automatically reduces TX_GAIN in discrete steps until current falls below limit. This closed-loop control protects the PA during short-circuit or high-impedance line faults while maintaining signal integrity without interrupting communication.

Can ST7580TR operate without an external crystal oscillator?

Yes - ST7580TR accepts an external clock signal (1.8–5.5 V_p-p, 8 MHz) on XIN with XOUT left floating. Alternatively, it supports an 8 MHz quartz crystal between XIN/XOUT with 16–20 pF load capacitance and ≤100 Ω ESR. Internal PLLs derive 8 MHz (AFE), 28 MHz (protocol), and 56 MHz (PHY) clocks from this source.