ATXMEGA16A4U-AU - 32MHz 16KB Flash AVR XMEGA MCU | Microchip
Teilenummer: ATXMEGA16A4U-AU ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $5.15 | $5,15 |
| 10 | $4.72 | $47,20 |
| 100 | $4.1 | $410,00 |
| 500 | $3.55 | $1.775,00 |
| 1.000 | $3.05 | $3.050,00 |
ATXMEGA16A4U-AU Übersicht
An MCU (microcontroller) is a single-chip computer integrating a CPU core, program memory, data memory, and peripherals such as ADC, timers, and communication interfaces. The AVR XMEGA A4U family specifically occupies the 8/16-bit low-power tier of the AVR RISC architecture hierarchy, sitting below 32-bit ARM Cortex-M parts but above legacy 8-bit ATmega families in performance and peripheral richness. It targets battery-powered and mixed-signal embedded designs where deterministic behavior, fast interrupts, and rich analog integration matter more than raw MHz.
Key features of the ATXMEGA16A4U-AU include 16 KB Flash with Read-While-Write support, a 4-channel DMA controller that off-loads the CPU from peripheral data movement, an 8-channel Event System for inter-peripheral signaling without CPU intervention, 34 general-purpose I/O lines, a 16-bit Real Time Counter (RTC), five 16-bit Timer/Counters, five USARTs, two TWI (I2C-compatible) ports, one SPI, a USB 2.0 Full-Speed device interface, and a 12-bit ADC with up to 12 channels plus dual 12-bit DAC channels. The peripheral set is unusually broad for a 16 KB Flash part.
Architecturally, the device uses the Atmel AVR enhanced RISC core with a two-stage pipeline, hardware multiplier, and a programmable multi-level interrupt controller. The 1.6 V to 3.6 V supply range and low-power sleep modes with RTC retention make it attractive for energy-harvesting and always-on applications.
Typical applications include USB HID peripherals, industrial sensor nodes, low-power wireless sensor hubs, building automation controllers, smart metering, LED lighting controllers with smooth dimming, and battery-backed IoT edge nodes. The integrated USB FS device is the distinguishing capability versus the non-U XMEGA A4 variants.
When designing with this MCU, allocate the 4 KB boot section for bootloader code so application firmware can use the full 16 KB, and provide a 32.768 kHz crystal on the RTC pins if RTC accuracy matters. The PDI programming interface requires only two pins, freeing most of the GPIO for application use.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes that go beyond the manufacturer datasheet narrative.
Drop-in-Alternativen für ATXMEGA16A4U-AU – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit ATXMEGA16A4U-AU (gleiche Bauform und Footprint) – abweichend in Core Architecture, EEPROM, SRAM, ADC, Program Memory (Flash).
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
ATXMEGA32A4U-AU
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ATXMEGA64A4U-AU
✅ Drop-In✓ Auf Lager
$4.55 / Stück
Datenblatt ansehen →ATXMEGA128A4U-AUR
✅ Drop-In✓ Auf Lager
$5.45 / Stück
Datenblatt ansehen →ATXMEGA16A4U-AUR
✅ Drop-In✓ Auf Lager
$4.1 / Stück
Datenblatt ansehen →ATXMEGA32A4U-AUR
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ATXMEGA16A4U-AU Grenzwerte & elektrische Eigenschaften
| Core Architecture | AVR enhanced RISC (8/16-bit) |
| Series | AVR XMEGA A4U |
| Maximum CPU Frequency | 32 MHz (32 MIPS) |
| Program Memory (Flash) | 16 KB (8K x 16) |
| Boot Code Section | 4 KB |
| SRAM | 2 KB |
| EEPROM | 1 KB |
| Supply Voltage (Vcc) | 1.6 V to 3.6 V |
| GPIO Pins | 34 |
| ADC | 12-bit, up to 12 channels |
| DAC | 12-bit, 2 channels |
| DMA Channels | 4 |
| Event System Channels | 8 |
| Timers/Counters | 5 x 16-bit |
| USART | 5 |
| TWI (I2C) | 2 |
| SPI | 1 |
| USB | USB 2.0 Full-Speed Device |
| RTC | 16-bit Real Time Counter |
| Betriebstemperatur | -40 C to +85 C |
| Gehäuse | 44-pin TQFP (10x10 mm) |
| Programming Interface | PDI (2-wire) |
| Montageart | Surface Mount |
| RoHS-Status | Compliant |
ATXMEGA16A4U-AU Pin-Konfiguration
| Pin 1 | PA0 — Port A bit 0, GPIO / ADC input |
| Pin 2 | PA1 — Port A bit 1, GPIO / ADC input |
| Pin 3 | PA2 — Port A bit 2, GPIO / ADC input |
| Pin 4 | PA3 — Port A bit 3, GPIO / ADC input |
| Pin 5 | PA4 — Port A bit 4, GPIO / ADC input |
| Pin 6 | PA5 — Port A bit 5, GPIO / ADC input |
| Pin 7 | PA6 — Port A bit 6, GPIO / ADC input |
| Pin 8 | PA7 — Port A bit 7, GPIO / ADC input |
| Pin 9 | AVCC — Analog supply voltage |
| Pin 10 | GND — Ground |
| Pin 11 | PB0 — Port B bit 0, GPIO |
| Pin 12 | PB1 — Port B bit 1, GPIO |
| Pin 13 | PB2 — Port B bit 2, GPIO / PDI_CLK |
| Pin 14 | PB3 — Port B bit 3, GPIO / PDI_DAT |
| Pin 15 | PB4 — Port B bit 4, GPIO |
| Pin 16 | PB5 — Port B bit 5, GPIO |
| Pin 17 | PB6 — Port B bit 6, GPIO |
| Pin 18 | PB7 — Port B bit 7, GPIO |
| Pin 19 | GND — Ground |
| Pin 20 | VCC — Digital supply voltage |
| Pin 21 | PC0 — Port C bit 0, GPIO |
| Pin 22 | PC1 — Port C bit 1, GPIO |
| Pin 23 | PC2 — Port C bit 2, GPIO |
| Pin 24 | PC3 — Port C bit 3, GPIO |
| Pin 25 | PC4 — Port C bit 4, GPIO |
| Pin 26 | PC5 — Port C bit 5, GPIO |
| Pin 27 | PC6 — Port C bit 6, GPIO |
| Pin 28 | PC7 — Port C bit 7, GPIO |
| Pin 29 | VCC — Digital supply voltage |
| Pin 30 | GND — Ground |
| Pin 31 | PD0 — Port D bit 0, GPIO |
| Pin 32 | PD1 — Port D bit 1, GPIO |
| Pin 33 | PD2 — Port D bit 2, GPIO |
| Pin 34 | PD3 — Port D bit 3, GPIO |
| Pin 35 | PD4 — Port D bit 4, GPIO |
| Pin 36 | PD5 — Port D bit 5, GPIO |
| Pin 37 | PE0 — Port E bit 0, GPIO / USB D- |
| Pin 38 | PE1 — Port E bit 1, GPIO / USB D+ |
| Pin 39 | PE2 — Port E bit 2, GPIO / TOSC1 |
| Pin 40 | PE3 — Port E bit 3, GPIO / TOSC2 |
| Pin 41 | VCC — Digital supply voltage |
| Pin 42 | GND — Ground |
| Pin 43 | XTAL1 — External clock input / crystal |
| Pin 44 | XTAL2 — External clock output / crystal |
Typische Anwendungen
ATXMEGA16A4U-AU ist geeignet für 6 Anwendungs: USB HID Peripheral Devices, Industrial Sensor Nodes, Building Automation Controllers, Smart Metering Edge Nodes, LED Lighting Controllers, Battery-Backed IoT Edge Nodes.
USB HID Peripheral Devices
The ATXMEGA16A4U-AU fits USB HID peripherals because of its integrated USB 2.0 Full-Speed device controller and 32 MIPS throughput. The 16 KB Flash easily accommodates HID report descriptors plus application logic, while the 5 USARTs and 2 TWI ports let a HID device also bridge to external sensors or motor drivers. Place a 22 ohm RC network on D+ and D- lines per USB FS specification. Unlike parts needing an external USB PHY, the A4U integrates PHY, pull-up resistor on D-, and clock recovery, reducing BOM cost. The 12-bit ADC is sufficient for any companion analog inputs.
Empfohlen
Industrial Sensor Nodes
Industrial sensor nodes use the ATXMEGA16A4U-AU because of its 12-bit ADC with 12 input channels, 4-channel DMA that streams ADC samples without CPU overhead, and 1.6 V to 3.6 V operation tolerant of industrial 24 V bus rails stepped down to 3.3 V. The 8-channel Event System synchronizes ADC sampling with timer triggers deterministically. The RTC with external 32.768 kHz crystal provides timestamped logging across -40 C to +85 C industrial temperature range. Compared to discrete ADC plus MCU solutions, the integrated ADC plus Event System reduces PCB area and BOM.
Empfohlen
Building Automation Controllers
Building automation controllers leverage the ATXMEGA16A4U-AU Event System and 5 USARTs for multi-protocol bridges between RS-485, RS-232, and TWI sensor networks. The 16 KB Flash fits BACnet, Modbus, or KNX lite application stacks, while the 1 KB EEPROM stores configuration parameters across firmware updates. The 32 MIPS throughput handles protocol conversion in real time. Unlike the older ATmega series, the A4U Event System routes peripheral triggers without CPU intervention, freeing cycles for protocol housekeeping.
Empfohlen
Smart Metering Edge Nodes
Smart metering edge nodes use the ATXMEGA16A4U-AU because of its RTC with external 32.768 kHz crystal for accurate time-of-use billing, its 1 KB EEPROM for tariff table persistence, and its low-power sleep modes with RTC retention. The 12-bit ADC accurately samples current and voltage sensors for power calculation, while the Event System synchronizes ADC sampling to the mains zero-crossing for precise reactive power measurement. Operating from a 1.6 V to 3.6 V supply lets the node run from a single Li-SOCl2 primary cell for 10+ year deployments.
Empfohlen
LED Lighting Controllers
LED lighting controllers use the ATXMEGA16A4U-AU because of its 5 x 16-bit Timer/Counters with PWM that can drive multiple LED channels with smooth dimming via 16-bit PWM resolution. The dual 12-bit DACs generate constant-current reference voltages for analog LED drivers. The DMA controller streams lighting patterns to LEDs without CPU load, enabling animated effects. Compared to 8-bit PWM timers, the 16-bit resolution eliminates visible flicker at low brightness levels. The 5 V tolerant GPIO on most ports simplifies interface to high-side LED drivers.
Empfohlen
Battery-Backed IoT Edge Nodes
Battery-backed IoT edge nodes use the ATXMEGA16A4U-AU because of its low-power sleep modes with RTC retention drawing only a few microamps, and its Event System that wakes the CPU only on sensor threshold events. The 1.6 V minimum supply lets the node run from a single alkaline or NiMH cell down to depletion. The integrated USB FS device allows the same node to be enumerated as a USB CDC device when plugged into a host for firmware update or telemetry dump, eliminating a second interface IC.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für ATXMEGA16A4U-AU – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | ATXMEGA32A4U-AU | ATXMEGA64A4U-AU | ATXMEGA128A4U-AUR | ATXMEGA16A4U-AUR | ATXMEGA32A4U-AUR |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (10x10 mm) | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same |
| Program Memory (Flash) | 16 KB | 32 KB | 64 KB | 128 KB | 16 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 4 KB | 8 KB | 2 KB | 2 KB |
| Maximum CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| USB Interface | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed Device |
| GPIO Count | 34 | 34 | 34 | 34 | 34 | 34 |
| Supply Voltage Range | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Approx. Unit Price (qty 1) | 5.15 USD | 6.10 USD | 7.20 USD | 8.50 USD | 5.15 USD | 6.10 USD |
Wichtigste Unterscheidungsmerkmale
- USB 2.0 Full-Speed device integrated on-chip (vs. ATXMEGA16A4-AU)
- Same-package Flash scaling to 128 KB (vs. ATXMEGA128A4U-AUR)
- Event System and DMA offload CPU (vs. ATMEGA32U4-AU)
Designhinweise
Decouple VCC and AVCC with at least 100 nF ceramic capacitors placed within 5 mm of the supply pins, plus a 10 uF bulk capacitor on VCC. The A4U has separate digital and analog supply rails (VCC and AVCC) - if ADC accuracy matters below 1 LSB at 12 bits, route AVCC through a ferrite bead or small inductor from VCC and add a separate 10 uF + 100 nF RC network on AVCC. Ground returns should use a star topology with the AGND pin tied to the digital GND plane at a single point beneath the IC.
Do not exceed the 32 MHz maximum CPU clock at any voltage; the internal 32 MHz oscillator is factory calibrated but must be re-calibrated after significant temperature excursions (above 70 C). The PDI programming interface uses PB2 and PB3 - if these pins are used for application I/O, ensure firmware releases them during PDI entry or programming will fail. The 4 KB boot section is protected by lock bits; setting BOOTRST correctly in fuses is required for bootloader entry on reset.
Route the USB D+ and D- traces as a 90 ohm differential pair with length matching within 2 mm, and place the 22 ohm series resistors within 2 mm of the MCU pins. Place the 32.768 kHz RTC crystal within 5 mm of the TOSC1/TOSC2 pins with short symmetric traces and a guard ring tied to GND to reduce capacitive coupling from switching signals. Estimated: a typical XMEGA A4U design needs a 4-layer PCB with a continuous ground plane beneath the MCU for ADC performance within 1 LSB at 12 bits.
Compliance-Informationen
RoHS and lead-free confirmed per Microchip product page; AEC-Q100 not applicable for non-automotive MCU line