ATMEGA32A-ANR - 8-bit AVR MCU, 32KB Flash, 16MHz, 44-TQFP
Référence : ATMEGA32A-ANR ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $5.2 | $5,20 |
| 10 | $4.68 | $46,80 |
| 100 | $4.16 | $416,00 |
| 500 | $3.74 | $1 870,00 |
| 1 000 | $3.32 | $3 320,00 |
ATMEGA32A-ANR Présentation
A microcontroller (MCU) is a single-chip computer containing a CPU core, non-volatile program memory (Flash), working memory (RAM), non-volatile data memory (EEPROM) and a rich set of peripherals (timers, ADC, communication ports, GPIO). In the system hierarchy an MCU sits below the system-on-chip (SoC) and the microprocessor (MPU); the ATmega32A family belongs to the AVR 8-bit enhanced-RISC family, which targets the embedded-control segment of the broader semiconductor market.
Key features of this part include an 8-channel 10-bit successive-approximation ADC, two hardware USARTs, an SPI serial interface, a TWI (I2C-compatible) interface, an on-chip analog comparator, programmable watchdog timer with separate on-chip oscillator, JTAG (IEEE 1149.1 compliant) interface for on-chip debug, and six software-selectable power-saving modes. The 32KB Flash supports the boot block feature, allowing resident bootloader code in a protected section.
Typical applications include industrial control systems, motor control front-ends, HVAC thermostats, white-goods user-interface boards, sensor hubs, and USB-to-UART bridges when paired with an external USB controller. The wide 2.7-5.5V operating range and -40C to +105C industrial temperature window make it suitable for both battery-powered and line-powered equipment.
When designing in this part, ensure the AVR Studio / Microchip Studio toolchain is selected, account for the TQFP-44 land pattern, and follow the standard ICSP 6-pin header pinout for in-system programming. According to the manufacturer datasheet, the JTAGEN fuse must be programmed to use the on-chip debug interface over JTAG.
Alternatives de remplacement direct pour ATMEGA32A-ANR — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ATMEGA32A-ANR (même facteur de forme et même empreinte) — différant par Package, Core Architecture, Debug Interface, Timers/Counters, Program Memory (Flash).
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ATMEGA32A-AN
✅ Remplacement direct✓ En stock
$3.4 / unité
Voir la fiche technique →ATMEGA32-16AUR
✅ Remplacement direct✓ En stock
$3.41 / unité
Voir la fiche technique →ATMEGA32-16AUR
✅ Remplacement direct✓ En stock
$3.41 / unité
Voir la fiche technique →ATMEGA164P-20AU
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATMEGA644PA-AU
✅ Remplacement direct✓ En stock
$4.61 / unité
Voir la fiche technique →ATMEGA32A-ANR Valeurs maximales et caractéristiques électriques
| Core Architecture | AVR 8-bit RISC |
| Program Memory (Flash) | 32 KB (16K x 16) |
| SRAM | 2 KB |
| EEPROM | 1 KB |
| Maximum CPU Speed | 16 MHz |
| MIPS Throughput | 16 MIPS at 16 MHz |
| Operating Voltage | 2.7 V to 5.5 V |
| Number of I/O Pins | 32 |
| ADC | 8-channel, 10-bit |
| Timers | 2x 8-bit + 1x 16-bit |
| Communication Interfaces | 2x USART, SPI, TWI (I2C) |
| Debug Interface | JTAG (IEEE 1149.1) |
| Boîtier | 44-pin TQFP (10x10 mm) |
| Température de fonctionnement | -40 C to +105 C |
| Type de montage | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Statut RoHS | Compliant |
Configuration des broches de ATMEGA32A-ANR
| Broche 1 | PB5 (MOSI) — Port B bit 5 / SPI MOSI (MOSI on ISP) |
| Broche 2 | PB6 (MISO) — Port B bit 6 / SPI MISO |
| Broche 3 | PB7 (SCK) — Port B bit 7 / SPI SCK |
| Broche 4 | RESET — Reset input (active low) |
| Broche 5 | VCC — Digital supply voltage |
| Broche 6 | GND — Digital ground |
| Broche 7 | XTAL2 — Crystal oscillator output |
| Broche 8 | XTAL1 — Crystal oscillator input |
| Broche 9 | PD0 (RXD) — Port D bit 0 / USART0 RXD |
| Broche 10 | PD1 (TXD) — Port D bit 1 / USART0 TXD |
| Broche 11 | PD2 (INT0) — Port D bit 2 / External INT0 |
| Broche 12 | PD3 (INT1) — Port D bit 3 / External INT1 |
| Broche 13 | PD4 (OC1B) — Port D bit 4 / Timer1 OC1B PWM |
| Broche 14 | PD5 (OC1A) — Port D bit 5 / Timer1 OC1A PWM |
| Broche 15 | PD6 (ICP1) — Port D bit 6 / Timer1 Input Capture |
| Broche 16 | PD7 (OC2) — Port D bit 7 / Timer2 OC2 PWM |
| Broche 17 | GND — Digital ground |
| Broche 18 | VCC — Digital supply voltage |
| Broche 19 | PC0 (SCL) — Port C bit 0 / TWI SCL |
| Broche 20 | PC1 (SDA) — Port C bit 1 / TWI SDA |
| Broche 21 | PC2 (TCK) — Port C bit 2 / JTAG TCK |
| Broche 22 | PC3 (TMS) — Port C bit 3 / JTAG TMS |
| Broche 23 | PC4 (TDO) — Port C bit 4 / JTAG TDO |
| Broche 24 | PC5 (TDI) — Port C bit 5 / JTAG TDI |
| Broche 25 | PC6 (TOSC1) — Port C bit 6 / Timer2 async osc |
| Broche 26 | PC7 (TOSC2) — Port C bit 7 / Timer2 async osc |
| Broche 27 | AVCC — Analog supply voltage |
| Broche 28 | AREF — ADC reference voltage |
| Broche 29 | AGND — Analog ground |
| Broche 30 | PA7 (ADC7) — Port A bit 7 / ADC7 |
| Broche 31 | PA6 (ADC6) — Port A bit 6 / ADC6 |
| Broche 32 | PA5 (ADC5) — Port A bit 5 / ADC5 |
| Broche 33 | PA4 (ADC4) — Port A bit 4 / ADC4 |
| Broche 34 | PA3 (ADC3) — Port A bit 3 / ADC3 |
| Broche 35 | PA2 (ADC2) — Port A bit 2 / ADC2 |
| Broche 36 | PA1 (ADC1) — Port A bit 1 / ADC1 |
| Broche 37 | PA0 (ADC0) — Port A bit 0 / ADC0 |
| Broche 38 | VCC — Digital supply voltage |
| Broche 39 | GND — Digital ground |
| Broche 40 | PB0 (XCK0) — Port B bit 0 / USART0 XCK |
| Broche 41 | PB1 (T1) — Port B bit 1 / Timer1 external |
| Broche 42 | PB2 (AIN0) — Port B bit 2 / Analog comp + |
| Broche 43 | PB3 (AIN1) — Port B bit 3 / Analog comp - |
| Broche 44 | PB4 (SS) — Port B bit 4 / SPI SS |
Applications typiques
ATMEGA32A-ANR convient pour 6 applications: Industrial Control Boards, Home Appliance User Interfaces, Motor Control Front-Ends, Sensor Hub / Data Logger, USB-to-UART Bridge / ISP Companion, Educational / Hobbyist Development Platforms.
Industrial Control Boards
The ATMEGA32A-ANR fits industrial control front-ends thanks to its 16 MIPS throughput, 32KB Flash for protocol stacks, and 8-channel 10-bit ADC for analog process-variable monitoring. With 32 programmable I/O lines it can drive relays, opto-isolated inputs and indicator LEDs without external mux logic. Placed as the central MCU on a control board, it polls analog sensors at 10-bit resolution and runs Modbus, CAN-soft or proprietary field-bus stacks in firmware. The -40C to +105C industrial temperature window meets IEC 60068 environmental stress for factory-floor equipment, and the JTAG debug port simplifies field diagnostics.
Recommandé
Home Appliance User Interfaces
The ATMEGA32A-ANR fits white-goods user-interface boards such as washing-machine front panels and dishwasher keypads, where the 32 programmable I/O pins scan matrix keypads and drive 7-segment or LCD displays while the 8-channel ADC reads temperature and humidity sensors. Six software-selectable power-saving modes cut standby current to microampere levels for Energy Star compliance. The 2KB SRAM hosts display buffers without external memory, and the 1KB EEPROM stores user settings that survive power cycles. The wide 2.7-5.5V supply tolerates unregulated 5V rails common in appliance SMPS designs.
Recommandé
Motor Control Front-Ends
The ATMEGA32A-ANR fits small brushed-DC and stepper motor control boards thanks to its two 8-bit and one 16-bit timer/counter, which can generate PWM at up to 16MHz with selectable prescalers for dead-band generation. The 32KB Flash stores trapezoidal or sinusoidal commutation tables for BLDC pre-drivers. Hall-sensor and back-EMF signals feed the 10-bit ADC at 15 kSps while the on-chip analog comparator triggers the ADC start-of-conversion for low-latency zero-crossing detection. JTAG debug simplifies tuning of PI loop constants during firmware bring-up.
Recommandé
Sensor Hub / Data Logger
The ATMEGA32A-ANR fits remote sensor hubs and stand-alone data loggers because the 1KB EEPROM serves as non-volatile circular buffer for months of measurement history, while the 2KB SRAM holds acquisition frames between writes. The 8-channel 10-bit ADC multiplexes thermocouples, RTDs and 4-20mA loop inputs through external signal conditioning, and the two USARTs stream data to an external radio module. Power-save mode plus watchdog wake-up stretches battery life to multi-year duty cycles on lithium primary cells.
Recommandé
USB-to-UART Bridge / ISP Companion
The ATMEGA32A-ANR fits USB-to-UART, USB-to-SPI and USB-to-I2C bridge dongles when paired with the on-chip USART, SPI and TWI peripherals. The 32KB Flash supports CDC ACM class drivers or vendor-specific HID stacks, while the 2KB SRAM buffers packets at full-speed USB rates. The 1KB EEPROM stores VID/PID and serial-number strings that survive firmware updates. JTAG debug plus the standard ICSP 6-pin header pinout makes it a popular target for Atmel/Microchip AVR in-system programming.
Recommandé
Educational / Hobbyist Development Platforms
The ATMEGA32A-ANR fits educational development kits and hobbyist platforms because the 32KB Flash, 2KB SRAM and full peripheral set are sufficient for learning AVR assembly, embedded C, and real-time control without resorting to higher-tier devices. The JTAG and ISPIC interfaces work with Microchip Studio / AVR Studio toolchains that ship free of charge, and a broad ecosystem of third-party libraries (FreeRTOS-avr, avr-libc, Arduino-style cores) reduces time-to-first-blink. The 44-TQFP package is breadboard-friendly with a TQFP-to-DIP breakout PCB, ideal for classroom labs.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATMEGA32A-ANR — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ATMEGA32A-AN | ATMEGA32-16AUR | ATMEGA32-16AU | ATMEGA164P-20AU | ATMEGA644PA-AU |
|---|---|---|---|---|---|---|
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) - same | 44-TQFP - same | 44-TQFP - same | 44-TQFP - same | 44-TQFP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB | 64 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 1 KB | 4 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 512 B | 2 KB |
| Max Clock Speed | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 20 MHz | 20 MHz |
| I/O Pins | 32 | 32 | 32 | 32 | 32 | 32 |
| Packaging (TR vs Tray) | Tape & Reel (TR) | Tray | Tape & Reel (TR) | Tray | Tray | Tray |
| Lifecycle | Active | Active | Active | Active | Active | Active |
Principaux différenciateurs
- A-silicon errata fixes plus JTAG debug (vs ATMEGA32-16AUR)
- 2x Flash headroom over ATmega164P (vs ATMEGA164P-20AU)
- Balanced memory vs ATmega644P upgrade (vs ATMEGA644PA-AU)
Notes de conception
Estimated: at 16 MHz active CPU the ATMEGA32A-ANR draws roughly 10-15 mA from VCC, dropping to microampere levels in Power-down mode with watchdog disabled. Decouple VCC, AVCC and the four power pins (5, 17, 18, 38) with 100 nF ceramics placed within 5 mm of each pin, plus a single 10 uF bulk cap on the board. Tie AVCC to VCC through an LC or ferrite bead filter to keep ADC noise below 1 LSB.
The 44-TQFP land pattern uses 0.8 mm pitch pads and should be routed with 4 mil traces and a single continuous ground plane beneath the device. Keep the crystal-trace lengths under 5 mm and surround them with a ground guard ring. Route the JTAG signals (TCK, TMS, TDO, TDI) as a matched-length group and place a 10 kohm pull-up on RESET to prevent spurious resets during power-up.
Do not confuse the ATMEGA32A (active) with the legacy ATmega32 (NRND/EOL transition). Always order ATmega32A for new designs - the "A" silicon revision fixes errata referenced in the datasheet's errata sheet and is the only variant currently recommended for new designs. Verify fuse settings (JTAGEN, BODLEVEL, CKDIV8) before locking the device with lock bits, since incorrectly programmed fuses can only be reversed with a high-voltage parallel programmer.
Informations de conformité
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - choose ATmega32A automotive grade (MAG-A) for AEC-Q100 requirements.