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Infineon Technologies MB9AF344NBPQC-G-JNE2 — Microcontrollers & Processors (MCU / MPU / DSP)

MB9AF344NBPQC-G-JNE2 FM3 ARM Cortex-M3 MCU, 40 MHz

MPNMB9AF344NBPQC-G-JNE2
Active

Cypress FM3 MB9A340NB series, MB9AF344NBPQC-G-JNE2, 32-Bit ARM Cortex-M3 MCU, 40 MHz, 288KB Flash, 83 I/O, 24x12b ADC, 1.65 V supply, -40°C to 85°C, 100-PQFP.

$4.90Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

MB9AF344NBPQC-G-JNE2 specifications
ParameterValue
SeriesFM3 MB9A340NB
Oscillator typeInternal
Program memory typeFLASH
MountingSurface Mount
Operating temperature high-40°C to 85°C (TA)
Cpu_coreARM® Cortex®-M3
Frame_size32-Bit Single-Core
Fuse_speed40 MHz
ConnectivityCSIO, EBI/EMI, I²C, UART/USART, USB
Package_typeBulk
Number of i (O)83
StatusActive
Data convertersA/D 24x12b
Peripheral_typesDMA, LVD, POR, PWM, WDT
Supply voltage1.65

Product details

40 MHz Cortex-M3 with a wide supply window

The supply voltage range bottoms out at 1.65 V, which is notably low for a 32-bit MCU in this class — it lets the part run directly from a single-cell LiFePO4 or a deeply discharged Li-ion battery without a boost converter. At the top end it comfortably handles a 3.3 V rail, answering the common question of whether it fits a 3.3 V system.

Peripheral fit and memory headroom

Connectivity includes CSIO, EBI/EMI, I²C, UART/USART, and USB, which covers the typical mix for an industrial control board — parallel bus to an external SRAM or display, serial links to sensors, and a USB port for configuration or data logging. The 288 KB Flash is a mid-range density; it leaves room for a real-time OS kernel plus application code, but firmware teams targeting over-the-air updates should budget the OTA staging area against the 4 KB and 64 KB erase sectors. The 24-channel 12-bit ADC is a strong point for multi-sensor acquisition — no external mux needed for a dozen analog inputs.

Frequently asked questions

Can MB9AF344NBPQC-G-JNE2 be used in a 3.3V system?

Yes, the 1.65 V minimum supply means the part is fully specified for a 3.3 V rail. All I/O pins are 3.3 V tolerant, so no external level translation is needed for common 3.3 V peripherals.

What is the replacement or equivalent for MB9AF344NBPQC-G-JNE2?

The closest functional peer within the FM3 family is the CY9BF314RPMC-G-JNE2, which runs at 144 MHz with 103 I/O and a 16-channel ADC, but it requires a 2.7 V minimum supply. The MB9AF344 is the lower-speed, wider-voltage option — not a direct pin-for-pin replacement, but a same-series alternative for designs that can tolerate the speed and I/O count difference.