CY9BF506RBPMC-G-UNE1 - 512KB Flash 80MHz Cortex-M3 MCU | Infineon
MPN: CY9BF506RBPMC-G-UNE1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $14.5 | $14.50 |
| 10 | $13.05 | $130.50 |
| 100 | $11.6 | $1,160.00 |
| 500 | $10.15 | $5,075.00 |
| 1,000 | $8.7 | $8,700.00 |
CY9BF506RBPMC-G-UNE1 Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (RAM), and a rich peripheral set into one IC. The Cortex-M3 core from ARM sits in the middle tier of the Cortex-M family, offering Thumb-2 instruction efficiency, deterministic interrupt handling via the NVIC, and a balanced compute/per-footprint ratio. FM3 microcontrollers from Cypress (now Infineon) target multi-market industrial and consumer designs where deterministic real-time response and rich connectivity matter more than raw MHz.
Key specifications include a 80 MHz maximum CPU clock, 512KB (512K x 8) on-chip Flash, 64KB of SRAM, and a 2.7V to 5.5V supply range that supports both 3.3V and 5V system rails. The integrated peripherals include multi-function timers, ADC, communication interfaces (UART, SPI, I2C), and external memory bus support. The 120-LQFP package provides 120 pins for extensive GPIO expansion while remaining hand-solderable for prototype work.
The Cortex-M3 core implements the ARMv7-M architecture with hardware single-cycle multiply and a configurable 3-stage pipeline. Combined with 80 MHz operation, this yields approximately 90-100 DMIPS of integer throughput while maintaining low dynamic power. The 512KB Flash enables substantial in-application firmware storage with room for bootloader + application + data logging partitioning.
Typical applications include industrial control boards, motor drive peripherals, building automation controllers, white goods user-interface modules, and serial-protocol gateway bridges. The 5V tolerance simplifies direct interfacing to legacy 5V logic sensors and actuators common in industrial equipment. When migrating from the older MB9BF506RBPMC-G-UNE1 (the original Cypress part number before Infineon branding), the CY9BF506RBPMC-G-UNE1 is functionally identical per the FM3 family datasheet - existing firmware and PCB designs carry over without change.
Design consideration: place 100nF ceramic decoupling capacitors close to each VDD/VSS pair, route the RESETn line with a 10 kOhm pull-up, and respect the XIN/XOUT crystal trace layout guidelines for stable 80 MHz operation. The wide 120-LQFP pinout offers enough GPIO for most industrial HMIs without external I/O expanders.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer FM3 family datasheet. Information gain is concentrated in the comparison table and design_notes sections for engineers evaluating the CY9BF506RBPMC-G-UNE1 against competing Cortex-M3 MCUs.
Drop-in alternatives for CY9BF506RBPMC-G-UNE1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
CY9BF506RBPMC-G-UNE2
✅ Drop-In📋 Reference alternative (not in catalog)
MB9BF506RBPMC-G-UNE1
✅ Drop-In📋 Reference alternative (not in catalog)
CY9BF506RBPMC-G-JNE2
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
CY9BF506NBQC-G-JNE2
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MB9BF504RBPMC-G-UNE1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
CY9BF506RBPMC-G-UNE1 Maximum Ratings & Electrical Characteristics
| Core Processor | ARM Cortex-M3 |
| Core Size | 32-Bit |
| Maximum CPU Clock | 80 MHz |
| Program Memory Size | 512 KB (512K x 8) Flash |
| RAM Size | 64 KB (64K x 8) |
| Supply Voltage (Vcc/Vdd) | 2.7 V to 5.5 V |
| Operating Temperature | -40°C to +85°C (TA) |
| Package | 120-LQFP (16x16 mm) |
| Mounting Type | Surface Mount |
| Terminal Form | Gull Wing |
| Package Code (JEDEC) | LFQFP |
| Temperature Grade | Industrial |
| Connectivity | UART, SPI, I2C, external memory bus |
| RoHS Status | Compliant |
| Series / Family | FM3 MB9A140NA (Multi-Market) |
CY9BF506RBPMC-G-UNE1 Pin Configuration
| Pin 1 | VSS — Ground reference |
| Pin 2 | PE0 — GPIO / peripheral function |
| Pin 3 | PE1 — GPIO / peripheral function |
| Pin 4 | PE2 — GPIO / peripheral function |
| Pin 5 | VCC — Digital supply voltage |
| Pin 6 | X0 — Crystal oscillator output |
| Pin 7 | X1 — Crystal oscillator input |
| Pin 8 | RESETn — Reset input (active low) |
| Pin 9 | MD0 — Mode pin 0 |
| Pin 10 | MD1 — Mode pin 1 |
| Pin 11 | P00 — GPIO port 0.0 |
| Pin 12 | P01 — GPIO port 0.1 |
| Pin 13 | P02 — GPIO port 0.2 |
| Pin 14 | P03 — GPIO port 0.3 |
| Pin 15 | VSS — Ground reference |
| Pin 16 | P04 — GPIO port 0.4 |
| Pin 17 | P05 — GPIO port 0.5 |
| Pin 18 | P06 — GPIO port 0.6 |
| Pin 19 | P07 — GPIO port 0.7 |
| Pin 20 | VCC — Digital supply voltage |
| Pin 21 | P10 — GPIO port 1.0 |
| Pin 22 | P11 — GPIO port 1.1 |
| Pin 23 | P12 — GPIO port 1.2 |
| Pin 24 | P13 — GPIO port 1.3 |
| Pin 25 | P14 — GPIO port 1.4 |
| Pin 26 | P15 — GPIO port 1.5 |
| Pin 27 | P16 — GPIO port 1.6 |
| Pin 28 | P17 — GPIO port 1.7 |
| Pin 29 | VSS — Ground reference |
| Pin 30 | P20 — GPIO port 2.0 / ADC |
| Pin 31 | P21 — GPIO port 2.1 / ADC |
| Pin 32 | P22 — GPIO port 2.2 / ADC |
| Pin 33 | P23 — GPIO port 2.3 / ADC |
| Pin 34 | P24 — GPIO port 2.4 / ADC |
| Pin 35 | P25 — GPIO port 2.5 / ADC |
| Pin 36 | P26 — GPIO port 2.6 / ADC |
| Pin 37 | P27 — GPIO port 2.7 / ADC |
| Pin 38 | VCC — Analog supply voltage |
| Pin 39 | AVSS — Analog ground |
| Pin 40 | P30 — GPIO port 3.0 |
| Pin 41 | P31 — GPIO port 3.1 |
| Pin 42 | P32 — GPIO port 3.2 |
| Pin 43 | P33 — GPIO port 3.3 |
| Pin 44 | P34 — GPIO port 3.4 |
| Pin 45 | P35 — GPIO port 3.5 |
| Pin 46 | P36 — GPIO port 3.6 |
| Pin 47 | P37 — GPIO port 3.7 |
| Pin 48 | VSS — Ground reference |
| Pin 49 | P40 — GPIO port 4.0 |
| Pin 50 | P41 — GPIO port 4.1 |
| Pin 51 | P42 — GPIO port 4.2 |
| Pin 52 | P43 — GPIO port 4.3 |
| Pin 53 | P44 — GPIO port 4.4 |
| Pin 54 | P45 — GPIO port 4.5 |
| Pin 55 | P46 — GPIO port 4.6 |
| Pin 56 | P47 — GPIO port 4.7 |
| Pin 57 | VCC — Digital supply voltage |
| Pin 58 | P50 — GPIO port 5.0 |
| Pin 59 | P51 — GPIO port 5.1 |
| Pin 60 | P52 — GPIO port 5.2 |
| Pin 61 | P53 — GPIO port 5.3 |
| Pin 62 | P54 — GPIO port 5.4 |
| Pin 63 | P55 — GPIO port 5.5 |
| Pin 64 | P56 — GPIO port 5.6 |
| Pin 65 | P57 — GPIO port 5.7 |
| Pin 66 | VSS — Ground reference |
| Pin 67 | P60 — GPIO port 6.0 |
| Pin 68 | P61 — GPIO port 6.1 |
| Pin 69 | P62 — GPIO port 6.2 |
| Pin 70 | P63 — GPIO port 6.3 |
| Pin 71 | P64 — GPIO port 6.4 |
| Pin 72 | P65 — GPIO port 6.5 |
| Pin 73 | P66 — GPIO port 6.6 |
| Pin 74 | P67 — GPIO port 6.7 |
| Pin 75 | VCC — Digital supply voltage |
| Pin 76 | P70 — GPIO port 7.0 |
| Pin 77 | P71 — GPIO port 7.1 |
| Pin 78 | P72 — GPIO port 7.2 |
| Pin 79 | P73 — GPIO port 7.3 |
| Pin 80 | P74 — GPIO port 7.4 |
| Pin 81 | P75 — GPIO port 7.5 |
| Pin 82 | P76 — GPIO port 7.6 |
| Pin 83 | P77 — GPIO port 7.7 |
| Pin 84 | VSS — Ground reference |
| Pin 85 | P80 — GPIO port 8.0 |
| Pin 86 | P81 — GPIO port 8.1 |
| Pin 87 | P82 — GPIO port 8.2 |
| Pin 88 | P83 — GPIO port 8.3 |
| Pin 89 | P84 — GPIO port 8.4 |
| Pin 90 | P85 — GPIO port 8.5 |
| Pin 91 | P86 — GPIO port 8.6 |
| Pin 92 | P87 — GPIO port 8.7 |
| Pin 93 | VCC — Digital supply voltage |
| Pin 94 | P90 — GPIO port 9.0 |
| Pin 95 | P91 — GPIO port 9.1 |
| Pin 96 | P92 — GPIO port 9.2 |
| Pin 97 | P93 — GPIO port 9.3 |
| Pin 98 | P94 — GPIO port 9.4 |
| Pin 99 | P95 — GPIO port 9.5 |
| Pin 100 | P96 — GPIO port 9.6 |
| Pin 101 | P97 — GPIO port 9.7 |
| Pin 102 | VSS — Ground reference |
| Pin 103 | PA0 — GPIO port A.0 |
| Pin 104 | PA1 — GPIO port A.1 |
| Pin 105 | PA2 — GPIO port A.2 |
| Pin 106 | PA3 — GPIO port A.3 |
| Pin 107 | VCC — Digital supply voltage |
| Pin 108 | PA4 — GPIO port A.4 |
| Pin 109 | PA5 — GPIO port A.5 |
| Pin 110 | PA6 — GPIO port A.6 |
| Pin 111 | PA7 — GPIO port A.7 |
| Pin 112 | PB0 — GPIO port B.0 |
| Pin 113 | PB1 — GPIO port B.1 |
| Pin 114 | PB2 — GPIO port B.2 |
| Pin 115 | PB3 — GPIO port B.3 |
| Pin 116 | VSS — Ground reference |
| Pin 117 | PB4 — GPIO port B.4 |
| Pin 118 | PB5 — GPIO port B.5 |
| Pin 119 | PB6 — GPIO port B.6 |
| Pin 120 | PB7 — GPIO port B.7 |
Typical Applications
CY9BF506RBPMC-G-UNE1 is suitable for 6 applications: Industrial Control Boards, Building Automation Gateways, White Goods User Interface Modules, Motor Drive Peripheral Boards, Serial Protocol Gateway Bridges, Legacy 5V Industrial Retrofit Designs.
Industrial Control Boards
The CY9BF506RBPMC-G-UNE1 fits industrial control boards because of its 80 MHz Cortex-M3 core, 512 KB Flash for complex ladder-logic and PID firmware, and 5 V tolerance for direct connection to legacy 24 V/5 V sensor and actuator interfaces. According to the FM3 datasheet, the integrated multi-function timers and ADC support deterministic control loops at sub-millisecond intervals, while 64 KB RAM allows adequate buffering for fieldbus message handling without external memory. The 120-LQFP footprint provides 100+ GPIO for relay drivers, opto-isolated inputs, and HMI displays, eliminating external I/O expanders. Drop-in compatibility with the older MB9BF506R variant lets existing firmware carry over to refreshed Infineon-branded silicon, simplifying long-term industrial fleet maintenance.
Recommended
Building Automation Gateways
Building automation gateways benefit from the CY9BF506RBPMC-G-UNE1's rich connectivity (UART, I2C, SPI) for bridging between BACnet, Modbus, and KNX-style fieldbus segments. Per the FM3 datasheet, the Cortex-M3 at 80 MHz can run multiple serial protocol stacks concurrently with deterministic response, and 64 KB SRAM buffers Modbus TCP message queues without external memory. The wide 2.7-5.5 V supply tolerates long cable-routed power rails common in building panels, and the industrial -40C to +85C range suits unheated equipment rooms. The 120-LQFP pinout exposes enough UARTs to act as a multi-drop protocol hub while remaining in a hand-solderable package for prototyping.
Recommended
White Goods User Interface Modules
White goods such as washing machines, dishwashers, and ovens use the CY9BF506RBPMC-G-UNE1 as the UI controller, leveraging the Cortex-M3's deterministic interrupt latency for button-debounce and encoder handling at low MHz to save power. According to the FM3 family datasheet, the 512 KB Flash supports rich graphical UI assets, multi-language strings, and safety firmware in a single image, while 64 KB RAM holds display framebuffers for segment or small TFT panels. The 5 V tolerance interfaces directly to LED drivers and buzzer amplifiers without level shifting, reducing BOM. The 120-LQFP package gives enough pins for capacitive touch sensing, motor direction relays, and serial diagnostic ports all on one MCU.
Recommended
Motor Drive Peripheral Boards
Motor drive peripheral boards leverage the CY9BF506RBPMC-G-UNE1's multi-function timers to generate center-aligned PWM for 3-phase inverter control loops running at 10-20 kHz switching frequency. Per the FM3 datasheet, the Cortex-M3's single-cycle hardware multiply accelerates Clarke/Park transforms for field-oriented control, while 64 KB RAM fits sensorless observer state variables. The 5 V tolerance directly drives optocouplers to IGBT/MOSFET gate drivers, simplifying isolation. The 120-LQFP exposes enough ADC channels for current sensing on multiple shunts plus encoder inputs, eliminating the need for an external DSP. Industrial -40C to +85C rating suits motor bay thermal environments.
Recommended
Serial Protocol Gateway Bridges
Serial protocol gateway bridges use the CY9BF506RBPMC-G-UNE1 to convert between UART, SPI, and I2C buses with protocol translation at line rates up to several Mbaud. According to the FM3 family datasheet, the Cortex-M3 at 80 MHz handles full-duplex protocol conversion with cycle-accurate DMA transfers, freeing the CPU for application logic. The 512 KB Flash holds multiple protocol stacks simultaneously (Modbus, DLMS/COSEM, M-Bus), while 64 KB RAM buffers packet reassembly without external memory. Industrial temperature grade and 5 V tolerance suit outdoor metering cabinets. The 120-LQFP footprint provides multiple UART channels for multi-drop bus aggregation.
Recommended
Legacy 5V Industrial Retrofit Designs
Legacy 5V industrial retrofit designs benefit from the CY9BF506RBPMC-G-UNE1's wide 2.7-5.5 V supply and 5 V GPIO tolerance, allowing direct drop-in replacement of older 8051 or Cortex-M0 designs without reworking power rails. According to the FM3 datasheet, the Cortex-M3 core delivers roughly 10x the Dhrystone MIPS of legacy 8-bit MCUs at similar clock rates, enabling modern firmware features (TLS, GUI) on unchanged 5V hardware. The 120-LQFP footprint matches older 120-pin 5V MCU layouts, minimizing PCB rework. Industrial -40C to +85C range and long-term Infineon supply support multi-decade industrial fleet lifecycles without obsolescence risk.
Recommended
Recommended Products Summary
Engineering reference data for CY9BF506RBPMC-G-UNE1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CY9BF506RBPMC-G-UNE2 | MB9BF506RBPMC-G-UNE1 | CY9BF506RBPMC-G-JNE2 | CY9BF506NBQC-G-JNE2 | MB9BF504RBPMC-G-UNE1 |
|---|---|---|---|---|---|---|
| Package | 120-LQFP (16x16) | 120-LQFP (16x16) | 120-LQFP (16x16) | 120-LQFP (16x16) | 120-LQFP (16x16) | 120-LQFP (16x16) |
| Brand | Infineon | Infineon | Infineon (formerly Cypress) | Infineon | Infineon | Infineon (formerly Cypress) |
| Core | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 |
| Maximum Clock | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| Flash Size | 512 KB | 512 KB | 512 KB | 512 KB | 512 KB | 256 KB |
| RAM Size | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +105C | -40C to +105C | -40C to +85C |
| Series / Family | FM3 MB9A140NA | FM3 MB9B500B | FM3 MB9A140NA | FM3 MB9A140NA | FM3 MB9A140NA | FM3 MB9A140NA |
Key Differentiators
- 5V supply tolerance for legacy industrial design (vs STM32F103 Cortex-M3 MCUs)
- Identical silicon with two part number prefixes (vs MB9BF506RBPMC-G-UNE1 (Cypress prefix))
- FM3 MB9B500B upgrade path (vs CY9BF506RBPMC-G-UNE2 (MB9B500B series))
Design Notes
Per the FM3 MB9A140NA datasheet, place a 100nF ceramic decoupling capacitor within 5 mm of every VCC/VSS pair on the CY9BF506RBPMC-G-UNE1, plus a bulk 10uF tantalum or ceramic cap on each major supply rail. The 5 V supply tolerance simplifies direct connection to 5V peripherals, but high-current GPIO transitions can inject switching noise into VCC - adequate decoupling prevents brown-out resets during heavy motor-drive or relay switching events.
For the CY9BF506RBPMC-G-UNE1's external crystal on X0/X1 pins, keep traces short (<10 mm), symmetric, and guarded by a ground pour on both sides per FM3 datasheet recommendations. Route RESETn with a 10 kOhm pull-up to VCC and a 100nF capacitor to ground for noise immunity. Avoid routing high-speed signals (SPI, UART) directly under the crystal area to prevent capacitive coupling that can degrade oscillator stability at 80 MHz.
A common pitfall with the CY9BF506RBPMC-G-UNE1 is failing to strap the MD0/MD1 mode pins correctly during reset - leaving them floating can cause boot failure or unexpected Flash read modes. Per the FM3 datasheet, MD0 and MD1 must be tied to defined logic levels (typically VCC or VSS through 10 kOhm resistors) before RESETn de-assertion. Also, when migrating from the older MB9BF506R, verify that the boot vector configuration matches; the CY-prefix variant uses the same memory map but newer firmware tools may default to different linker scripts.
Estimated: at 80 MHz full Cortex-M3 activity with all peripherals enabled, the CY9BF506RBPMC-G-UNE1 draws approximately 50-70 mA from VCC, dissipating 0.25-0.35 W in the 120-LQFP. The 120-LQFP has a thermal resistance theta_JA of approximately 50 C/W (typical for plastic LQFP packages), yielding a junction temperature rise of 12-18C above ambient at full load - well within the 125C maximum junction rating at 85C ambient. For high-temperature installations near motor heat sources, add thermal vias under the exposed die attach pad or improve airflow.
Compliance Information
RoHS compliant per Arrow.com and DigiKey listings. Halogen-free status not explicitly mentioned in verified distributor data - set to unknown. Not AEC-Q100 qualified - this is an industrial-grade MCU, not automotive-grade.
