ATMEGA32-16AQR - 8-Bit AVR MCU 32KB 16MHz | Microchip
Référence : ATMEGA32-16AQR ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $6.42 | $6,42 |
| 10 | $5.78 | $57,80 |
| 100 | $5.15 | $515,00 |
| 500 | $4.63 | $2 315,00 |
| 1 000 | $4.12 | $4 120,00 |
ATMEGA32-16AQR Présentation
An AVR microcontroller is a Harvard-architecture 8-bit RISC device that executes most instructions in a single clock cycle from on-chip Flash memory. Within the product taxonomy, the ATmega32 sits under AVR 8-bit MCUs, which belong to the broader microcontroller family, itself a subset of embedded processors and integrated circuits. The ATmega32 family is one of the most widely deployed 8-bit MCU platforms in industrial, consumer, and educational designs because of its 5V operation, rich peripheral set, and mature toolchain.
Key features include 32 KB ISP Flash with read-while-write capability, 1 KB EEPROM for non-volatile parameter storage, 2 KB SRAM, 32 general-purpose working registers, 54 general-purpose I/O lines in the TQFP-44 package, an 8-channel 10-bit ADC, a JTAG interface for on-chip debug and boundary scan, and two USARTs. The device supports self-programming via a boot loader, enabling field firmware updates without an external programmer.
The ATmega32 uses Microchip's low-power AVR 8-bit RISC core with 131 powerful instructions, most executing in a single clock cycle. The 16 MHz maximum clock yields 16 MIPS, and the 5V operating range provides strong noise immunity for industrial environments. The -16AQR suffix denotes 16 MHz, TQFP package, extended temperature range, Green/RoHS-compliant construction, and tape-and-reel packaging.
Typical applications include industrial control panels, motor control, battery chargers, home automation nodes, data loggers, and educational embedded platforms. The 5V I/O and 10-bit ADC make it well suited to direct sensor interfacing without level shifting.
When designing with this device, decouple every VCC pin with a 100 nF ceramic capacitor placed close to the pin, and provide a clean analog supply for AVCC when using the ADC. Note that Microchip recommends the newer ATmega32A for new designs.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single reference for selection and second-sourcing.
Alternatives de remplacement direct pour ATMEGA32-16AQR — 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 ATMEGA32-16AQR (même facteur de forme et même empreinte) — différant par Debug Interface, Package, Core Architecture, Operating Temperature, RoHS Status.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ATMEGA32A-AU
✅ Remplacement direct✓ En stock
$2.95 / unité
Voir la fiche technique →ATMEGA32-16AC
✅ Remplacement direct✓ En stock
$4.48 / unité
Voir la fiche technique →ATMEGA32-16AU
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATMEGA32L-8AU
✅ Remplacement direct✓ En stock
$3.72 / unité
Voir la fiche technique →ATMEGA32-16AQR Valeurs maximales et caractéristiques électriques
| Core Architecture | 8-bit AVR RISC |
| Program Memory | 32 KB ISP Flash (16K x 16) |
| EEPROM | 1 KB |
| SRAM | 2 KB |
| Fréquence d'horloge maximale | 16 MHz |
| Throughput | Up to 16 MIPS at 16 MHz |
| Instruction Set | 131 powerful instructions, most single-clock cycle |
| General Purpose Working Registers | 32 x 8-bit |
| General Purpose I/O Lines | 54 (TQFP-44 package) |
| ADC | 8-channel, 10-bit |
| Operating Voltage | 4.5 V to 5.5 V |
| Température de fonctionnement | -40C to +85C (extended) |
| Boîtier | 44-TQFP (10x10 mm) |
| Type de montage | Surface Mount |
| Debug Interface | JTAG (on-chip debug and boundary scan) |
| USART | 2 |
| Flash Endurance | 10,000 write/erase cycles |
| Packaging | Tape & Reel |
| Statut RoHS | Compliant (Green) |
Configuration des broches de ATMEGA32-16AQR
| Broche 1 | PB0 — Port B bit 0 / T0 / XCK |
| Broche 2 | PB1 — Port B bit 1 / T1 |
| Broche 3 | PB2 — Port B bit 2 / INT2 / AIN0 |
| Broche 4 | PB3 — Port B bit 3 / AIN1 / OC0 |
| Broche 5 | PB4 — Port B bit 4 / SS |
| Broche 6 | PB5 — Port B bit 5 / MOSI |
| Broche 7 | PB6 — Port B bit 6 / MISO |
| Broche 8 | PB7 — Port B bit 7 / SCK |
| Broche 9 | RESET — Reset input (active low) |
| Broche 10 | VCC — Digital supply voltage |
| Broche 11 | GND — Ground |
| Broche 12 | XTAL2 — Crystal oscillator output |
| Broche 13 | XTAL1 — Crystal oscillator input |
| Broche 14 | PD0 — Port D bit 0 / RXD |
| Broche 15 | PD1 — Port D bit 1 / TXD |
| Broche 16 | PD2 — Port D bit 2 / INT0 |
| Broche 17 | PD3 — Port D bit 3 / INT1 |
| Broche 18 | PD4 — Port D bit 4 / OC1B |
| Broche 19 | PD5 — Port D bit 5 / OC1A |
| Broche 20 | PD6 — Port D bit 6 / ICP1 |
| Broche 21 | PD7 — Port D bit 7 / OC2 |
| Broche 22 | PC0 — Port C bit 0 / ADC0 |
| Broche 23 | PC1 — Port C bit 1 / ADC1 |
| Broche 24 | PC2 — Port C bit 2 / ADC2 |
| Broche 25 | PC3 — Port C bit 3 / ADC3 |
| Broche 26 | PC4 — Port C bit 4 / ADC4 |
| Broche 27 | PC5 — Port C bit 5 / ADC5 |
| Broche 28 | PC6 — Port C bit 6 / ADC6 |
| Broche 29 | PC7 — Port C bit 7 / ADC7 |
| Broche 30 | AVCC — Analog supply voltage for ADC |
| Broche 31 | GND — Ground |
| Broche 32 | AREF — Analog reference voltage for ADC |
| Broche 33 | PA7 — Port A bit 7 / ADC7 |
| Broche 34 | PA6 — Port A bit 6 / ADC6 |
| Broche 35 | PA5 — Port A bit 5 / ADC5 |
| Broche 36 | PA4 — Port A bit 4 / ADC4 |
| Broche 37 | PA3 — Port A bit 3 / ADC3 |
| Broche 38 | PA2 — Port A bit 2 / ADC2 |
| Broche 39 | PA1 — Port A bit 1 / ADC1 |
| Broche 40 | PA0 — Port A bit 0 / ADC0 |
| Broche 41 | VCC — Digital supply voltage |
| Broche 42 | GND — Ground |
| Broche 43 | TCK — JTAG test clock |
| Broche 44 | TMS — JTAG test mode select |
Applications typiques
ATMEGA32-16AQR convient pour 6 applications: Industrial Control Panels, Battery Chargers and Power Management, Home Automation Nodes, Data Loggers and Instrumentation, Motor Control, Embedded Education and Prototyping.
Industrial Control Panels
The ATMEGA32-16AQR fits industrial control panels because its 4.5-5.5 V operating range and -40C to +85C extended temperature rating tolerate the noisy 5V rails and wide ambient swings found on factory floors. Its 54 general-purpose I/O lines in the 44-pin TQFP package can drive relays, read limit switches, and interface with 5V optocouplers directly, without level shifters. The 8-channel 10-bit ADC samples analog sensors such as thermistors and pressure transducers, while the dual USARTs provide Modbus or serial HMI links. Placed on a control board with a 100 nF decoupling capacitor on each VCC pin, the device adds no switching noise to the analog front end, but designers must budget the 16 MHz clock's supply current when sizing the 5V regulator.
Recommandé
Battery Chargers and Power Management
The ATMEGA32-16AQR suits battery charger control because its 8-channel 10-bit ADC monitors cell voltage and temperature while the 16 MHz core runs charge-profile state machines in real time. The 32 KB Flash stores multiple battery chemistry profiles, and the 1 KB EEPROM retains calibration constants and cycle counters across power loss. PWM outputs from the 8-bit timers drive the charge FET gate through a driver stage, and the 5V I/O interfaces directly with shunt amplifiers and thermistor dividers. Because the device operates down to 4.5 V, it can run from a regulated 5V auxiliary rail derived from the battery, but designers should note that unlike a dedicated charger IC it dissipates no power in the charge path itself, so thermal design focuses on the external FET.
Recommandé
Home Automation Nodes
The ATMEGA32-16AQR is well suited to home automation nodes because its 5V I/O and 54 GPIO lines interface directly with relays, triacs, and 5V sensor modules without level shifting, simplifying node hardware. The 32 KB Flash holds protocol stacks and scene logic, while 2 KB SRAM buffers sensor telemetry and the 1 KB EEPROM stores network credentials and device addresses. Dual USARTs allow one port for a wireless module and one for local diagnostics. Running at 16 MHz, the core handles polling of PIR, reed, and temperature sensors with ample margin. Placed on a node PCB with a 100 nF decoupling capacitor per VCC pin, the MCU adds negligible noise, though designers should keep the crystal traces short to avoid EMI coupling into the ADC.
Recommandé
Data Loggers and Instrumentation
The ATMEGA32-16AQR fits data loggers because the 8-channel 10-bit ADC digitizes sensor channels while the 32 KB Flash and 1 KB EEPROM store sample buffers and calibration data without external memory. The JTAG interface supports in-system debug and boundary scan, which shortens bring-up of multi-channel acquisition firmware. At 16 MHz the core performs oversampling and averaging in real time, improving effective ADC resolution. The 5V operating range allows direct connection to 5V instrumentation amplifiers and multiplexers. In a logger design the MCU is typically paired with an external serial Flash or SD card for bulk storage, and designers must decouple AVCC separately from VCC with an LC filter to keep ADC noise below one LSB.
Recommandé
Motor Control
The ATMEGA32-16AQR supports motor control applications because its 16 MHz core executes PID loops fast enough for brushed DC and stepper commutation, while the 8-bit timers generate PWM for H-bridge gate drivers. The 8-channel 10-bit ADC reads current shunts and position potentiometers, and the 54 GPIO lines handle limit switches, encoder inputs, and fault signals. The 5V I/O drives gate driver logic directly, avoiding level shifters. The extended -40C to +85C rating covers industrial motor enclosures. Because the device has no dedicated motor-control PWM peripheral, designers implement commutation in firmware, which costs CPU cycles but keeps BOM cost low; a 100 nF decoupling capacitor per VCC pin and a separate analog supply for AVCC are essential to keep ADC current-sense readings clean.
Recommandé
Embedded Education and Prototyping
The ATMEGA32-16AQR is a strong choice for embedded education and prototyping because its 5V operation is tolerant of breadboard wiring and its 44-pin TQFP package exposes 54 GPIO lines for teaching parallel I/O, timers, ADC, and serial protocols. The 32 KB Flash accommodates substantial student projects, and the JTAG interface provides on-chip debug without an external emulator. The mature AVR toolchain and abundant reference material lower the learning curve. In a teaching lab the device is typically mounted on a breakout board with a 16 MHz crystal and 22 pF load capacitors, and each VCC pin is decoupled with 100 nF. Unlike 3.3V ARM boards, the 5V I/O lets students drive LEDs and buzzers directly without transistor buffers.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATMEGA32-16AQR — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ATMEGA32A-AU | ATMEGA32-16AC | ATMEGA32-16AU | ATMEGA32L-8AU |
|---|---|---|---|---|---|
| Package | 44-TQFP (10x10) | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum Clock Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 8 MHz |
| Program Memory | 32 KB Flash | 32 KB Flash | 32 KB Flash | 32 KB Flash | 32 KB Flash |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Operating Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 2.7 V to 5.5 V |
| Operating Temperature | -40C to +85C | -40C to +85C | 0C to +70C (commercial) | -40C to +85C | -40C to +85C |
| GPIO Lines | 54 | 54 | 54 | 54 | 54 |
| ADC | 8-channel 10-bit | 8-channel 10-bit | 8-channel 10-bit | 8-channel 10-bit | 8-channel 10-bit |
| Packaging | Tape & Reel | Tray | Tray | Tray | Tray |
Principaux différenciateurs
- Extended temperature grade in tape-and-reel (vs ATMEGA32-16AC)
- 16 MHz speed grade with 5V operation (vs ATMEGA32L-8AU)
- Newer recommended revision available as drop-in (vs ATMEGA32A-AU)
Notes de conception
Decouple every VCC pin (pins 10 and 41) with a 100 nF ceramic capacitor placed within a few millimeters of the pin, and add a 10 uF bulk capacitor per board. Supply AVCC (pin 30) through a separate LC filter from VCC to keep digital switching noise out of the ADC reference path. Estimated: at 16 MHz and 5V the core draws on the order of 15 mA, so a 100 mA LDO with 10 uF output capacitance provides ample margin.
Keep the 16 MHz crystal and its 22 pF load capacitors as close to XTAL1/XTAL2 (pins 13 and 12) as possible, with a solid ground plane beneath and no traces routed under the crystal. Route the JTAG signals (TCK, TMS, TDI, TDO) away from the analog input traces to avoid coupling into the 10-bit ADC. Place the AREF bypass capacitor directly at pin 32.
Do not leave the RESET pin floating; add a 10 kOhm pull-up to VCC and a 100 nF capacitor to ground to prevent spurious resets in noisy environments. Note that Microchip recommends the newer ATmega32A for new designs, so verify firmware compatibility and fuse settings when migrating. Ensure the ISP/JTAG programming interface is not loaded by external circuitry during in-system programming.
Informations de conformité
Distributor listings describe the ATMEGA32-16AQR as Green and RoHS compliant. REACH, halogen-free, and conflict-minerals status are not stated in the verified data and are marked unknown rather than assumed.