AT32F421K8T7

The AT32F421K8T7 (ARM Cortex-M4) has several equivalents:
- STMicroelectronics STM32F030x8 (Cortex-M0)
- NXP LPC845M301JBD64 (Cortex-M0+)
- GD32E230K8T6 (Cortex-M23, pin-compatible)
- APM32F103C8T6 (Cortex-M3, similar features)
These offer comparable performance, peripherals, and pinouts. For exact replacements, check voltage, speed, and peripheral compatibility.

The AT32F421K8T7 is a 32-bit ARM Cortex-M4 microcontroller from Artery with 32 pins (LQFP32 package).
Key Functions:
- Core: 120 MHz Cortex-M4 with FPU
- Memory: 64 KB Flash, 16 KB SRAM
- Peripherals:
- 1x USB 2.0 FS
- 3x USART, 2x SPI, 2x I2C
- 1x 12-bit ADC (10 ch)
- 7x 16-bit timers
- Up to 27x GPIOs
Pin Roles:
- Power (VDD, VSS)
- Clock (OSC_IN, OSC_OUT)
- Debug (SWDIO, SWCLK)
- GPIOs (multifunctional for UART, SPI, etc.)
Compact and versatile for cost-sensitive embedded applications.

The AT32F421K8T7 is manufactured by Artery Technology, a Chinese semiconductor company specializing in 32-bit ARM Cortex-M microcontrollers (MCUs).
Artery focuses on high-performance, low-power MCUs for applications like consumer electronics, industrial control, and IoT. Their products are known for cost-effectiveness and compatibility with STM32 MCUs, making them popular alternatives.
The company is headquartered in Shenzhen, China, and has gained recognition in the embedded systems market for its competitive offerings.

The AT32F421K8T7, a 32-bit ARM Cortex-M4 MCU by Artery, is widely used in:
- Consumer Electronics: Smart home devices, wearables.
- Industrial Control: PLCs, motor control, sensors.
- IoT: Wireless modules, edge nodes.
- Automotive: Auxiliary systems (e.g., lighting, small actuators).
- Medical: Portable diagnostic tools.
- HMI: Touch panels, LED displays.
Its features (64 KB Flash, 16 KB RAM, 72 MHz speed, rich peripherals) suit cost-sensitive, real-time applications.

The AT32F421K8T7 is packaged in a LQFP-32 (Low-Profile Quad Flat Package) with 32 pins. This compact surface-mount package is suitable for space-constrained applications, offering good thermal and electrical performance. The LQFP-32 has a body size of 7x7mm and a lead pitch of 0.8mm.