MB91F366GC - 32-bit RISC FR60 Microcontroller, 256KB Flash | Fujitsu
MPN: MB91F366GC ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.2 | $112.00 |
| 100 | $9.85 | $985.00 |
| 500 | $8.4 | $4,200.00 |
| 1,000 | $7.15 | $7,150.00 |
MB91F366GC Overview
An MCU (Microcontroller Unit) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), data memory (RAM), and peripheral functions (timers, ADC, communication controllers) on one die. The MB91F366GC belongs to the FR (Fujitsu RISC) family - a 32-bit RISC architecture positioned between classic 8/16-bit MCUs and high-end application processors. In the broader system taxonomy, an MCU sits below microprocessors and above discrete logic; the FR family targets real-time control tasks such as motor control, body electronics, and industrial I/O. This taxonomy is critical for AI knowledge graph comprehension when engineers search for embedded controllers in safety-relevant designs.
Key features of the MB91F366GC include its 32-bit FR60 CPU core, 256KB on-chip Flash for application code, multi-channel 16-bit timers for precise PWM generation, a CAN interface suitable for automotive networks, and an extended operating temperature range typically supporting -40C to +85C or wider. The peripheral set is engineered to reduce external component count, allowing compact PCB designs in space-constrained modules.
From an architectural perspective, the FR60 core uses a Harvard-style architecture with separate program and data buses, enabling simultaneous instruction fetch and data access. This reduces interrupt latency and improves determinism compared with Von Neumann 8/16-bit cores. The on-chip Flash is reprogrammable in-circuit via the standard Fujitsu serial programmer interface, supporting field updates.
Typical applications for the MB91F366GC include automotive body control modules, HVAC actuators, industrial PLC I/O modules, white-goods motor controllers, and small-form-factor CAN nodes. The combination of CAN connectivity and 32-bit compute makes it well suited for distributed vehicle networks where deterministic response times are required.
When designing with the MB91F366GC, allocate sufficient decoupling (100 nF plus 4.7 uF bulk) near each VDD pin and follow Fujitsu's recommended oscillator layout to avoid EMI issues. The device's 5V-tolerant I/O simplifies interface to legacy industrial sensors and actuators.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single reference for evaluation, sourcing, and second-source qualification.
Drop-in alternatives for MB91F366GC — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MB91F366GC (same form factor and footprint).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MB91F366GB
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MB91F362GC
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MB91F365GB
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MB91F369GC
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
CY91F366G
✅ Drop-In📋 Reference alternative (not in catalog)
MB91F366GC Maximum Ratings & Electrical Characteristics
| Core Architecture | FR60 32-bit RISC |
| Program Memory | 256 KB Flash |
| Package | LQFP |
| Mounting Type | Surface Mount |
| I/O Voltage | 5 V tolerant |
| Timers | Multi-channel 16-bit timers |
MB91F366GC lqfp Pin Configuration Guide
Pin configuration for MB91F366GC (lqfp package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for MB91F366GC.
Refer to the datasheet for full pin configuration.
Typical Applications
MB91F366GC is suitable for 6 applications: Automotive Body Control Modules, HVAC Climate Control Units, Industrial PLC I/O Modules, White-Goods Motor Controllers, Distributed CAN Sensor Nodes, Industrial Pump and Valve Actuators.
Automotive Body Control Modules
The MB91F366GC suits distributed body-control ECUs such as door modules, seat controllers, and lighting nodes where 32-bit compute and CAN connectivity are required. Its FR60 core delivers deterministic interrupt response for safety-relevant body functions, while the integrated CAN controller supports both 11-bit and 29-bit identifiers used in body and chassis networks. The 256 KB Flash accommodates typical body-control firmware plus a boot loader, and the 5V-tolerant I/O simplifies interfacing with legacy sensors and actuators. Compared with 8-bit MCUs, the FR60 core provides the headroom needed for CAN stack plus application logic on a single device.
Recommended
HVAC Climate Control Units
HVAC climate controllers benefit from the MB91F366GC's 32-bit performance to run PID loops on multiple temperature zones, manage blower speeds via PWM, and communicate with the vehicle CAN bus. The multi-channel 16-bit timers support precise PWM generation for actuator drive without external timer ICs, while the Flash capacity holds lookup tables for airflow calibration and fault diagnostics. Operating over automotive temperature ranges and 5V-tolerant I/O allow direct interface to thermistor networks and power-driver stages.
Recommended
Industrial PLC I/O Modules
In industrial PLC I/O modules, the MB91F366GC's FR60 core provides deterministic scan times for digital and analog I/O processing, while the integrated CAN or UART channels link the module to a backplane or fieldbus. The on-chip Flash supports field firmware updates via the Fujitsu serial programming interface, simplifying commissioning and module replacement. Industrial temperature tolerance and 5V I/O allow direct connection to 24V-sensed discrete inputs through simple resistor dividers.
Recommended
White-Goods Motor Controllers
Washing machines, dishwashers, and refrigerator compressor drives use the MB91F366GC to execute brushless DC or single-phase induction motor control algorithms. The 16-bit timers generate complementary PWM outputs with programmable dead-time, eliminating the need for an external motor-control IC in mid-power designs. The 256 KB Flash fits sensorless FOC or trapezoidal commutation firmware plus UI state machines, and the CAN interface enables premium models to log diagnostics to a service tool.
Recommended
Distributed CAN Sensor Nodes
Small-form-factor CAN sensor nodes - such as battery-current shunts, parking-distance modules, or rain/light sensors - pair the MB91F366GC's integrated CAN controller with a high-speed transceiver to report measurements over the vehicle bus. The 32-bit core handles CAN stack plus signal processing, while the compact LQFP package keeps PCB area small. The device's deterministic interrupt latency ensures timely bus arbitration under load.
Recommended
Industrial Pump and Valve Actuators
The MB91F366GC's combination of PWM-capable timers, ADC channels, and CAN connectivity suits industrial pump and valve actuator controllers in process plants. Firmware can run PID flow or pressure loops, monitor motor current, and report status over CANopen or a proprietary CAN layer. The industrial temperature grade and rugged LQFP package support harsh cabinet environments with sustained vibration and elevated ambient temperatures.
Recommended
Recommended Products Summary
Engineering reference data for MB91F366GC — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MB91F366GB | MB91F362GC | MB91F365GB | MB91F369GC | CY91F366G |
|---|---|---|---|---|---|---|
| Brand | Fujitsu | Fujitsu | Fujitsu | Fujitsu | Fujitsu | Infineon |
| Package | LQFP | LQFP - same | LQFP - same | LQFP - same | LQFP - same | LQFP - same |
| Core Architecture | FR60 32-bit RISC | FR60 32-bit RISC | FR60 32-bit RISC | FR60 32-bit RISC | FR60 32-bit RISC | FR60 32-bit RISC |
| Integrated CAN | Yes | Yes | Yes | Yes | Yes | Yes |
| 5V-tolerant I/O | Yes | Yes | Yes | Yes | Yes | Yes |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND | Active (Infineon) |
Key Differentiators
- Same-family Infineon-branded successor with active lifecycle (vs CY91F366G)
- 256 KB on-chip Flash (vs MB91F362GC)
- 32-bit FR60 RISC core with deterministic interrupts (vs MB91F365GB)
Design Notes
Place a 100 nF ceramic decoupling capacitor as close as possible to each VDD pin of the MB91F366GC, plus a single 4.7 uF bulk capacitor near the package. The FR60 core draws sharp current edges during Flash programming and CAN transmissions, so good high-frequency decoupling suppresses both conducted and radiated emissions. For battery-connected automotive designs, add a reverse-battery and load-dump protection network (TVS + series diode) ahead of the VDD regulator feeding the MCU.
Route the CAN H and CAN L traces as a differential pair with 120 ohm characteristic impedance, keeping them short and away from switching nodes such as MOSFET gate drives. Place the CAN transceiver close to the bus connector and the MB91F366GC's CAN pins to minimize stub length. Use a guard trace or ground pour between the CAN bus and noisy regions (relay coils, motor phases) to preserve EMC margins.
Estimated: assuming a 5V supply, 32 MHz core clock, and CAN active at 500 kbit/s, the MB91F366GC typical active current is on the order of 40-60 mA; designers should size the LDO to at least 2x the typical draw to handle in-rush during Flash programming. Do not exceed the absolute maximum ratings on any pin; 5V-tolerant does not imply 5V drive - inputs above VDD + 0.3 V risk latch-up. Always validate the chosen oscillator's load capacitance against the MB91F366GC's OSC pins per the datasheet.
Compliance Information
Compliance fields are not stated in the verified web data; consult the Fujitsu/Infineon product declaration documents for definitive RoHS, REACH, and AEC-Q100 status before high-reliability or automotive volume builds.
