ATMEGA32U4-AU vs ATMEGA32A-AU Comparison
Detailed side-by-side comparison of ATMEGA32U4-AU by Microchip Technology and ATMEGA32A-AU by Microchip Technology. Compare key specifications, electrical parameters, packaging, lifecycle status, pricing, and availability to determine the best component for your design requirements.
Microchip Technology
ATMEGA32U4-AU - 8-bit AVR MCU, 16MHz, 32KB Flash, USB | Microchip
ATMEGA32U4-AU ✓ ActiveMicrochip Technology
ATMEGA32A-AU - 8-bit AVR MCU, 32KB Flash, 16MHz, TQFP-44 | Microchip
ATMEGA32A-AU ✓ ActiveSpecification Comparison
| Parameter | ATMEGA32U4-AU | ATMEGA32A-AU |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Category | Microcontrollers | Microcontrollers |
| Lifecycle Status | Active | Active |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $4.25 | $2.95 |
| Core Architecture | 8-bit AVR RISC | AVR RISC 8-bit |
| CPU Speed | 16 MHz | — |
| Throughput | 16 MIPS at 16 MHz | — |
| Flash Program Memory | 32 KB (16K x 16) | — |
| SRAM | 2.5 KB | 2 KB |
| EEPROM | 1 KB | 1 KB |
| Supply Voltage | 2.7 V to 5.5 V (verified 4.5-5.5V in some sources; full range per datasheet) | — |
| I/O Pins | 32 programmable | 32 programmable |
| USB | USB 2.0 full-speed / low-speed device, on-chip transceiver | — |
| ADC | 12-channel, 10-bit | 8-channel, 10-bit |
| Timers | 4 (2x 8-bit, 2x 16-bit) | — |
| Communication | USB, USART, SPI, TWI (I2C) | — |
| Debug Interface | JTAG / debugWIRE | JTAG (IEEE 1149.1 compliant) |
| Package | 44-pin TQFP (10x10 mm, 0.8 mm pitch) | 44-pin TQFP (10x10 mm, 0.8 mm pitch) |
| Mounting Type | Surface Mount | Surface Mount |
| Operating Temperature | -40 C to +85 C (industrial) | -40C to +85C (industrial) |
| Instruction Set | 131 instructions, mostly single-cycle | — |
| RoHS Status | Compliant | Compliant (Green) |
| Manufacturer | — | Microchip Technology (formerly Atmel) |
| Series | — | AVR ATmega |
| Maximum Clock Frequency | — | 16 MHz |
| MIPS Throughput | — | 16 MIPS at 16 MHz |
| Program Memory (Flash) | — | 32 KB |
| Operating Voltage Range | — | 2.7 V to 5.5 V |
| Timers/Counters | — | Two 8-bit and one 16-bit |
| Communication Peripherals | — | USART, SPI, TWI (I2C) |