AT32F421 — value-optimized MCU family in the Artery AT32 portfolio
The AT32F421 is a value-optimized MCU in Artery Technology's 32-bit AT32 microcontroller portfolio. It runs at up to 120 MHz system clock, with up to None KB of on-chip Flash and 8, 16 KB of SRAM, built around a high-efficiency ARM Cortex-M core.
The family is aimed at high-volume consumer and cost-sensitive products that still want 32-bit processing and a real peripheral set. Offered in TSSOP20 6.5x4.4 mm, QFN284x4 mm, QFN32 4x4 mm, QFN32 5x5 mm, LQFP327x7 mm, LQFP487x7 mm packaging, one design can scale across pin-count variants while keeping the core software identical.
Key specifications (manufacturer data)
| Parameter | Value |
|---|---|
| CPU frequency（MHz） | 120 |
| Flash（KB） | 16, 32, 64 |
| SRAM (KB) | 8, 16 |
| Timers | Advanced, 1 |
| 16-bit general-purpose | 5 |
| Basic | 1 |
| SysTick | 1 |
| WDT | 1 |
| WWDT | 1 |
| ERTC | 1 |
| Communication | I²C, 2 |
| SPI/I²S | 1/1(1), 2/2 |
| USART+UART | 1+1(2), 2+0 |
| Infrared transmitter | 1 |
| Analog | 12-bit ADCnumbers/channels, 1 |
| 9 | 10, 11, 15 |
| Comparator | 1 |
| GPIO | 15, 23, 27, 25, 39 |
| Operating temperatures | -40 °C to +105 °C |
| Packages | TSSOP20 6.5x4.4 mm, QFN284x4 mm, QFN32 4x4 mm, QFN32 5x5 mm, LQFP327x7 mm, LQFP487x7 mm |
| Ordering codes | AT32F421xxP7, AT32F421xxU7, AT32F421xxU7-4, AT32F421xxU7, AT32F421xxT7, AT32F421xxT7 |
| Flash / package variants | F6, F8, G4, G6, G8, K4, K6, K8, K4, K6, K8, K4, K6, K8, C4, C6, C8 |
Sourcing from icboms
As an independent distributor, icboms sources the AT32F421 family at competitive B2B pricing with short lead times from Shenzhen. The codes above follow Artery's ordering scheme — the 'xx' in codes such as AT32F421xxP7 stands for the flash and package variant markers. Send us the exact part number and quantity for a firm quote, MOQ and lead time.