embedded-processors-controllers

AT32F421C8

Full part number: AT32F421C8T7

Key datasheet specifications and the closest alternatives, ranked by parametric similarity and grounded in the manufacturer datasheet.

01 — Overview

This datasheet covers the AT32F421C8T7 MCU from Artery, part of a family ranging from 16KB to 64KB flash. It details an ARM Cortex-M4 microcontroller operating up to 120 MHz with DSP instructions and memory protection. Key parameters include 2.4-3.6V supply voltage, 12-bit ADC at 2 MSPS, 5-channel DMA, and multiple communication interfaces like I2C, USART, and SPI. The device supports various low-power modes and comes in LQFP, QFN, and TSSOP packages for temperatures from -40 to +105°C.

02 — Key specifications

Datasheet parameters

ParameterMinTypMaxConditions
quiescent current — 445 µA 4.1 mA 调压器处于运行模式，高速内部 RC 振荡器和高速外部振荡器处于关闭状态（没有独立看门狗）
supply voltage range 2.4 V — 3.6 V
operating temperature -40 °C — 105 °C
clock frequency — 120 MHz —
power dissipation — — 230 mW LQFP48 (7 x 7 mm)
cpu speed — 120 MHz —
program memory size — 65.5 kB —
ram size — 16.4 kB —
io count — 25 —
adc resolution — 12 bit —
core size — 32 bit —
rise time — — 20 ns
03 — Alternatives

Closest matches to AT32F421C8

AT32F415KBU7 2.0× higher program memory size, 2.0× higher ram size, 1.7× lower rise time
AT32F421G8U7 similar adc resolution, similar clock frequency, similar core size
STM32F103B 5.6× lower quiescent current, 3.3× lower clock frequency, 2.0× higher program memory size
STM32F103C8T6 18.9× lower quiescent current, 3.3× lower clock frequency, 2.0× higher power dissipation
CH32V203C6T6 15.0× lower clock frequency, 2.5× lower quiescent current, 2.0× lower program memory size
MSPM0G3507 3.2× lower quiescent current, 2.0× higher program memory size, 2.0× higher ram size
STM32G431x6 7.5× higher quiescent current, 2.0× lower program memory size, 2.0× higher ram size
STM32F405OET6 12.0× higher ram size, 8.0× lower clock frequency, 8.0× higher program memory size
04 — FAQ

Frequently asked questions

What is the ADC resolution of the AT32F421C8T7?

The ADC resolution is 12 bit.

What is the maximum clock frequency of the AT32F421C8T7?

The maximum clock frequency is 120 MHz.

What is the core size of the AT32F421C8T7?

The core size is 32 bit.

What is the maximum CPU speed of the AT32F421C8T7?

The maximum CPU speed is 120 MHz.

What is the I/O count for the AT32F421C8T7?

The AT32F421C8T7 has 25 I/Os.

What is the maximum operating temperature for the AT32F421C8T7?

The maximum operating temperature is 105 °C.

What is the power dissipation for the AT32F421C8T7 in an LQFP48 (7 x 7 mm) package?

The power dissipation is 230 mW.

What is the program memory size of the AT32F421C8T7?

The program memory size is 65.5 kB.

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