Renesas M306N5FCTFP#UKV

Overview

M306N5FCTFP#UKV from Renesas Electronics is a 16-bit Flash-based microcontroller in the M16C/6N Group, featuring a M16C/60 Series CPU core, 128 KB + 4 KB data flash memory, 5 KB RAM, and integrated CAN 2.0B module - designed for automotive T-grade (−40°C to +85°C) control applications including body electronics and powertrain subsystems.

For engineers reviewing the M306N5FCTFP#UKV datasheet, M306N5FCTFP#UKV pinout, M306N5FCTFP#UKV application, or M306N5FCTFP#UKV equivalent, key selection considerations include its 100-pin QFP package (PRQP0100JB-A), dual 16-bit timer arrays (Timer A ×5, Timer B ×6), 26-channel 10-bit ADC, two 8-bit DACs, and IEBus/I²C/UART serial interfaces supporting real-time embedded control.

Technical Context

The M306N5FCTFP#UKV implements a high-efficiency silicon-gate CMOS M16C/60 CPU core with 91 fundamental instructions and minimum instruction execution time of 50.0 ns at 20 MHz BCLK (1/1 prescaler, no wait states). It supports single-chip, memory expansion, and microprocessor operating modes with 1 Mbyte address space.

Its peripheral set includes a dedicated three-phase motor control circuit, 2-channel DMAC, CRC-CCITT calculation unit, watchdog timer (15-bit), and four clock generation circuits (main/sub oscillators, on-chip oscillator, PLL frequency synthesizer), enabling deterministic timing for safety-critical automotive subsystems.

Key Specifications

Pinout & Package

Package: 100-pin plastic QFP (PRQP0100JB-A, 100P6S-A), 0.5 mm pitch, 14 mm × 20 mm footprint, lead-free (Pb-free) compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M306N5FCTFP#UKV, R5F566TEADFP offers superior compute throughput for advanced motor control but requires redesign for IEBus removal, while M306N4FCTFP#UJ retains full software and pin compatibility at lower memory density - making it ideal for derivative designs with reduced feature scope.

Availability

M306N5FCTFP#UKV is available at Aetrix Electronics and suitable for automotive body electronics, electric power steering subsystems, and car audio head units requiring stable component supply across extended product lifecycles.

Supply support for M306N5FCTFP#UKV 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, and power devices for automotive, industrial, and IoT markets.

The M16C/6N Group, including M306N5FCTFP#UKV, was engineered for cost-effective, high-reliability automotive control applications - balancing real-time performance, integrated peripherals, and AEC-Q100-aligned qualification.

FAQ

What is the maximum operating frequency of the M306N5FCTFP#UKV?

The M306N5FCTFP#UKV operates at up to 20 MHz BCLK (50.0 ns minimum instruction execution time) under T-version conditions (4.2–5.5 V supply). Its PLL frequency synthesizer allows internal clock multiplication, but the maximum guaranteed BCLK remains 20 MHz for this variant. The M306N5FCTFP#UKV maintains timing integrity across its −40°C to +85°C operating range without derating.

Does the M306N5FCTFP#UKV support in-circuit debugging?

Yes, the M306N5FCTFP#UKV supports on-chip debugging via the on-chip debug interface (OCD) using Renesas E8/E8a emulators. This enables real-time breakpoint setting, register inspection, and flash programming during development - critical for validating timing-critical automotive firmware on the M306N5FCTFP#UKV hardware platform.

What is the purpose of the P9_5/ANEX0 and P9_6/ANEX1 pins on the M306N5FCTFP#UKV?

P9_5/ANEX0 and P9_6/ANEX1 serve dual roles: as extended analog inputs for the 10-bit ADC (supporting external op-amp configurations) and as CAN receive/transmit pins (CRX0/CTX0) for the integrated CAN 2.0B module. This dual functionality allows flexible board layout - either analog signal conditioning or CAN physical layer interfacing - depending on system architecture requirements for the M306N5FCTFP#UKV.

How does the M306N5FCTFP#UKV handle power supply decoupling for analog and digital domains?

The M306N5FCTFP#UKV separates analog and digital power domains with dedicated AVCC/AVSS pins for the 10-bit ADC and 8-bit DAC, and VCC1/VCC2/VSS for digital logic and I/O. Proper decoupling requires 0.1 µF ceramic capacitors placed near each AVCC–AVSS pair and VCC1–VSS/VCC2–VSS pairs - ensuring noise isolation critical for accurate analog measurements in automotive environments where the M306N5FCTFP#UKV is deployed.

Is the M306N5FCTFP#UKV pin-compatible with other members of the M16C/6N Group?

Yes, the M306N5FCTFP#UKV shares the same 100-pin PRQP0100JB-A QFP package and pin assignment with other M16C/6N5 variants (e.g., M306N5FCFP, M306N5FCTGP). Pin functions, electrical characteristics, and peripheral mappings are consistent across the group - enabling hardware reuse and firmware portability between Normal-, T-, and V-version parts, provided memory and feature requirements align for the M306N5FCTFP#UKV use case.