STMicroelectronics STM32F107RBT6TR

Overview

STM32F107RBT6TR from STMicroelectronics is a 32-bit ARM Cortex-M3 microcontroller in LQFP64 package, featuring 128 KB Flash, 64 KB SRAM, dual CAN 2.0B interfaces, USB OTG FS controller with on-chip PHY, and 10/100 Ethernet MAC with IEEE 1588 support - deployed in industrial gateways requiring real-time protocol bridging and deterministic network timing.

For engineers reviewing the STM32F107RBT6TR datasheet, STM32F107RBT6TR pinout, STM32F107RBT6TR application, or STM32F107RBT6TR equivalent, key selection criteria include Ethernet MAC DMA buffer size (4 KB), CAN SRAM allocation (512 bytes), USB OTG HNP/SRP/ID capability, and LQFP64 I/O count (51 GPIOs with 5 V tolerance).

Technical Context

The device integrates a single ARM Cortex-M3 core running at up to 72 MHz with 1.25 DMIPS/MHz performance, supporting zero-wait-state Flash execution. Its connectivity architecture features two independent CAN controllers with dedicated 512-byte SRAM, a full-speed USB OTG FS peripheral with hardware HNP/SRP/ID negotiation, and an Ethernet MAC with MII/RMII interface and IEEE 1588 timestamping logic.

Memory subsystem includes 128 KB of embedded Flash (with ECC and 10K write/erase cycles), 64 KB general-purpose SRAM, and 96-bit unique ID. Clock system comprises 3–25 MHz external crystal oscillator, factory-trimmed 8 MHz RC, and 40 kHz RC with calibration - all feeding a multi-PLL system enabling precise clock tree configuration for synchronous Ethernet and USB timing.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, rated for industrial temperature range (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar connectivity MCU applications.

Compared with STM32F107VCT6, the RBT6TR offers identical connectivity features in a smaller LQFP64 footprint and lower cost, while STM32F407VGT6 trades integrated Ethernet for raw processing power and larger memory - making the RBT6TR optimal for space-constrained, dual-network edge nodes.

Availability

STM32F107RBT6TR is available at Aetrix Electronics and suitable for industrial gateways, automated test equipment, motor drive controllers, and building automation systems requiring stable component supply and long-term manufacturing continuity.

Supply support for STM32F107RBT6TR 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, power ICs, sensors, and analog products for industrial, automotive, and consumer markets.

The STM32F107xx Connectivity line targets embedded networking applications, delivering integrated Ethernet MAC, dual CAN, and USB OTG in a single chip to reduce system complexity and bill-of-materials cost for industrial communication nodes.

FAQ

Does STM32F107RBT6TR support IEEE 1588 Precision Time Protocol?

Yes. The integrated 10/100 Ethernet MAC includes hardware timestamping logic compliant with IEEE 1588-2008, enabling sub-microsecond packet timestamping without CPU involvement. This supports transparent clock and boundary clock implementations in industrial Ethernet networks.

What is the maximum CAN bit rate supported?

The dual CAN 2.0B controllers support bit rates up to 1 Mbps under standard conditions. Timing is configurable via programmable bit timing registers (BTR), and hardware filtering allows up to 144 message objects per CAN instance using the dedicated 512-byte SRAM.

Is external PHY required for Ethernet operation?

No. The STM32F107RBT6TR contains a fully integrated 10/100 Ethernet MAC with dedicated DMA and SRAM, but requires an external PHY for physical layer signaling (MII or RMII interface). It does not include an on-die PHY - unlike its USB OTG FS peripheral which has an integrated transceiver.

How many USB endpoints does the OTG controller support?

The USB OTG FS controller supports 4 bidirectional endpoints (EP0–EP3), including one control endpoint (EP0) and three configurable bulk/isochronous/interrupt endpoints. Endpoint memory is allocated from the dedicated 1.25 KB SRAM, with flexible descriptor-based buffer management.