Renesas M306N5FCTFP

Overview

M306N5FCTFP from Renesas Electronics is a 16-bit flash-based microcontroller in the M16C/6N Group, featuring the M16C/60 Series CPU core, 128 KB + 4 KB data flash memory, 5 KB RAM, and automotive-grade operation up to 125°C. It integrates one CAN 2.0B module, 10-bit A/D converter (26 channels), dual 8-bit D/A converters, five 16-bit multifunction timers (Timer A), six-channel Timer B, three serial interfaces (UART/I²C/IEBus), DMAC (2 channels), and PLL clock synthesis. It targets automotive body control modules requiring robust real-time control and CAN communication.

For engineers reviewing the M306N5FCTFP datasheet, M306N5FCTFP pinout, M306N5FCTFP application, or M306N5FCTFP equivalent, this page delivers verified technical context, exact pin functions for PRQP0100JB-A QFP package, key timing and electrical specs, automotive-qualified operating conditions, and two validated alternative MCUs with documented functional and thermal differences.

Technical Context

The M306N5FCTFP implements the M16C/60 Series CPU core with 91 fundamental instructions and executes at 41.7 ns minimum instruction time (24 MHz BCLK, 1/1 prescaler). Its memory architecture supports 1 Mbyte address space across on-chip flash, external memory expansion via 100-pin multiplexed/demultiplexed bus (A0–A19, D0–D15), and flexible operating modes (single-chip, memory expansion, microprocessor).

Peripheral integration includes a dedicated CAN 2.0B controller with full protocol handling, a CRC-CCITT calculation circuit, three-phase motor control outputs (U/V/W), and dual independent serial I/O channels supporting UART, clock-synchronous, and I²C-bus protocols - all synchronized to the internal PLL-generated clock system with main/sub oscillators and on-chip oscillator.

Key Specifications

Pinout & Package

Package: 100-pin molded-plastic QFP (PRQP0100JB-A / 100P6S-A), 0.65 mm pitch, 14 mm × 20 mm footprint, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M306N5FCTFP, R5F102MAASP offers lower power and smaller footprint but lacks native CAN, while MB9BF518RPMC delivers CAN FD and ARM ecosystem advantages at higher design complexity and cost - M306N5FCTFP remains optimal for legacy-compatible, CAN 2.0B–based automotive modules requiring proven qualification and minimal toolchain migration.

Availability

M306N5FCTFP is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor controllers, and CAN-based building automation systems requiring stable component supply and long-term lifecycle assurance.

Supply support for M306N5FCTFP 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

Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The M16C/6N Group, including M306N5FCTFP, was designed specifically for automotive body electronics and industrial control applications demanding CAN 2.0B connectivity, extended temperature operation, and integrated analog/motor peripherals.

FAQ

What is the maximum operating frequency and corresponding supply voltage for M306N5FCTFP?

The M306N5FCTFP achieves a minimum instruction execution time of 41.7 ns at 24 MHz BCLK, requiring a supply voltage of 4.2 V to 5.5 V. This specification applies specifically to the T-version (–40°C to +125°C) and is validated under 1/1 prescaler and no software wait conditions. Operation outside this voltage range may result in timing violations or functional failure.

Does M306N5FCTFP include an on-chip CAN transceiver?

No, M306N5FCTFP integrates only the CAN protocol controller (CAN 2.0B compliant), not the physical layer transceiver. External CAN transceivers such as the SN65HVD230 or TJA1042 must be used to interface with the CAN bus. Pins P9_5 (CRX0) and P9_6 (CTX0) serve as comparator inputs/outputs for the internal CAN logic but do not drive the bus directly.

What is the purpose of the 4 KB data flash block in M306N5FCTFP?

The 4 KB data flash block (Block A) in M306N5FCTFP is electrically erasable and programmable up to 100 times. It is intended for storing calibration data, configuration parameters, fault logs, or user-defined settings that must persist across power cycles - eliminating the need for external EEPROM or FRAM in cost-sensitive automotive modules.

Which package variant corresponds to M306N5FCTFP, and what are its mechanical dimensions?

M306N5FCTFP uses the PRQP0100JB-A (100P6S-A) 100-pin plastic QFP package: 14.0 mm × 20.0 mm body size, 0.65 mm lead pitch, and 3.2 mm maximum height. This package is RoHS-compliant and qualified for reflow soldering per J-STD-020, with thermal resistance (θ_JA) of 40°C/W typical.

How does the M306N5FCTFP handle reset and clock failure detection?

M306N5FCTFP includes an oscillation-stopped detector that monitors the main clock (XIN/XOUT) for stoppage and automatic re-oscillation recovery. The RESET pin is active-low and initiates hardware reset; it also supports watchdog timeout reset via the 15-bit WDT with prescaler. These features ensure fail-safe behavior in automotive environments where clock integrity is critical.