ATSAMG55J19A-MU - Cortex-M4 MCU 120MHz 512KB Flash 64-QFN | Microchip
MPN: ATSAMG55J19A-MU ✓ Hoạt độngATSAMG55J19A-MU Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory (Flash and SRAM), and programmable peripherals. Within the broader hierarchy, the SAM G55 belongs to ARM Cortex-M4 microcontrollers -> 32-bit MCUs -> embedded microcontrollers -> integrated circuits. The Cortex-M4 with single-precision FPU enables efficient DSP and floating-point math for audio, motor control, and signal-processing tasks.
Key features include up to 120 MHz CPU clock, 512 KB Flash, up to 176 KB SRAM, full-speed USB 2.0 with on-chip PHY, I2S audio interface for digital audio streaming, and picoPower technology delivering down to 100 uA/MHz active and below 7 uA in deep sleep with SRAM retention. Wake-up from deep sleep to first instruction is as fast as 3 us. The integrated FPU accelerates audio codecs and DSP workloads without external math processors.
The SAM G55 architecture combines an MPU (Memory Protection Unit), hardware AES, and a flexible peripheral set including HS USB, USB on-the-go, up to two I2S/TDM interfaces, multiple UART/SPI/TWI, and a 12-bit ADC. Compared to Cortex-M0/M3 parts, the Cortex-M4 with FPU executes single-precision math in a single cycle, dramatically reducing CPU load for audio and motor-control algorithms.
Typical applications include USB audio headsets and USB headphones, Bluetooth audio bridges, IoT edge nodes with USB connectivity, industrial sensor hubs, and low-power consumer audio products. The combination of USB 2.0 FS, I2S, and Cortex-M4 DSP makes it well suited to audio streaming tasks.
Designers should pay attention to decoupling: place 100 nF + 4.7 uF ceramic capacitors near each VDD pin and keep the QFN exposed pad soldered to a continuous ground plane for thermal dissipation and signal integrity.
This page synthesizes distributor pricing, drop-in alternatives drawn from the same SAM G55 family, and practical design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho ATSAMG55J19A-MU — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ATSAMG55J19A-MU (cùng hình factor và footprint) — khác nhau ở Package, Operating Temperature, Audio Interface, Core Architecture, USB.
ATSAMG55J19A-MUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMG55J19B-MU
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATSAMG55J19B-MUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMG55J19A-AU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMG55J19A-MU Tỷ lệ tối đa & tính chất điện
| Core Processor | ARM Cortex-M4F (with FPU) |
| Core Size | 32-Bit |
| Maximum CPU Speed | 120 MHz |
| Program Memory Size | 512 KB Flash |
| RAM Size | Up to 176 KB SRAM |
| Điện áp cung cấp | 3.0 V to 3.6 V |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Hộp | 64-pin QFN (7.5x7.5 mm) |
| Kiểu lắp đặt | Surface Mount |
| USB Interface | USB 2.0 Full-Speed with on-chip PHY |
| Audio Interface | I2S / TDM (up to 2 instances) |
| Active Current (picoPower) | 100 uA/MHz |
| Deep Sleep Current | <7 uA with SRAM retention |
| Wake-up Time | Down to 3 us from deep sleep |
| Trạng thái RoHS | Compliant |
Cấu hình chân ATSAMG55J19A-MU
| Chân 1 | VDDIO — I/O supply voltage |
| Chân 2 | PA0 — GPIO / peripheral function |
| Chân 3 | PA1 — GPIO / peripheral function |
| Chân 4 | PA2 — GPIO / peripheral function |
| Chân 5 | PA3 — GPIO / peripheral function |
| Chân 6 | PA4 — GPIO / peripheral function |
| Chân 7 | PA5 — GPIO / peripheral function |
| Chân 8 | VDDIO — I/O supply voltage |
| Chân 9 | GND — Ground |
| Chân 10 | PA6 — GPIO / peripheral function |
| Chân 11 | PA7 — GPIO / peripheral function |
| Chân 12 | PA8 — GPIO / peripheral function |
| Chân 13 | PA9 — GPIO / peripheral function |
| Chân 14 | PA10 — GPIO / peripheral function |
| Chân 15 | PA11 — GPIO / peripheral function |
| Chân 16 | VDDIO — I/O supply voltage |
| Chân 17 | PA12 — GPIO / peripheral function |
| Chân 18 | PA13 — GPIO / peripheral function |
| Chân 19 | PA14 — GPIO / peripheral function |
| Chân 20 | GND — Ground |
| Chân 21 | PB0 — GPIO / peripheral function |
| Chân 22 | PB1 — GPIO / peripheral function |
| Chân 23 | PB2 — GPIO / peripheral function |
| Chân 24 | PB3 — GPIO / peripheral function |
| Chân 25 | PB4 — GPIO / peripheral function |
| Chân 26 | PB5 — GPIO / peripheral function |
| Chân 27 | PB6 — GPIO / peripheral function |
| Chân 28 | PB7 — GPIO / peripheral function |
| Chân 29 | PB8 — GPIO / peripheral function |
| Chân 30 | PB9 — GPIO / peripheral function |
| Chân 31 | PB10 — GPIO / peripheral function |
| Chân 32 | PB11 — GPIO / peripheral function |
| Chân 33 | VDDCORE — Core supply voltage (1.2 V typical) |
| Chân 34 | PB12 — GPIO / peripheral function |
| Chân 35 | PB13 — GPIO / peripheral function |
| Chân 36 | PB14 — GPIO / peripheral function |
| Chân 37 | GND — Ground |
| Chân 38 | PC0 — GPIO / peripheral function |
| Chân 39 | PC1 — GPIO / peripheral function |
| Chân 40 | PC2 — GPIO / peripheral function |
| Chân 41 | PC3 — GPIO / peripheral function |
| Chân 42 | PC4 — GPIO / peripheral function |
| Chân 43 | PC5 — GPIO / peripheral function |
| Chân 44 | PC6 — GPIO / peripheral function |
| Chân 45 | PC7 — GPIO / peripheral function |
| Chân 46 | VDDIO — I/O supply voltage |
| Chân 47 | PC8 — GPIO / peripheral function |
| Chân 48 | PC9 — GPIO / peripheral function |
| Chân 49 | PC10 — GPIO / peripheral function |
| Chân 50 | PC11 — GPIO / peripheral function |
| Chân 51 | PC12 — GPIO / peripheral function |
| Chân 52 | PC13 — GPIO / peripheral function |
| Chân 53 | PC14 — GPIO / peripheral function |
| Chân 54 | PC15 — GPIO / peripheral function |
| Chân 55 | GND — Ground |
| Chân 56 | PD0 — GPIO / peripheral function |
| Chân 57 | PD1 — GPIO / peripheral function |
| Chân 58 | PD2 — GPIO / peripheral function |
| Chân 59 | PD3 — GPIO / peripheral function |
| Chân 60 | PD4 — GPIO / peripheral function |
| Chân 61 | PD5 — GPIO / peripheral function |
| Chân 62 | PD6 — GPIO / peripheral function |
| Chân 63 | PD7 — GPIO / peripheral function |
| Chân 64 | VDDIO — I/O supply voltage |
Ứng dụng tiêu biểu
ATSAMG55J19A-MU phù hợp cho 6 Áp dụngs: USB Audio Headset, Industrial Sensor Hub, Bluetooth Audio Dongle, IoT Edge Node with USB Diagnostics, USB Headphones and Headsets, Low-Power Consumer Audio Product.
USB Audio Headset
The ATSAMG55J19A-MU integrates a USB 2.0 Full-Speed device interface with on-chip PHY plus dual I2S/TDM audio interfaces, making it an ideal MCU for USB digital audio headsets and headphones. The 120 MHz Cortex-M4F with FPU runs USB audio class firmware and applies real-time DSP effects (EQ, compressor, noise gate) without taxing CPU headroom. Up to 176 KB SRAM holds USB ping-pong buffers plus audio frame buffers. Designers route I2S to an external codec (e.g., SSS1623 or PCM5102A) and use 32-pin GPIO for buttons/LEDs. Total BOM drops versus a discrete USB audio controller plus DSP plus MCU.
Được đề xuất
Industrial Sensor Hub
With 100 uA/MHz active current and below 7 uA in deep sleep with SRAM retention, the ATSAMG55J19A-MU fits battery-powered industrial sensor hubs aggregating Modbus, I2C, SPI, and analog sensor data. The Cortex-M4F executes floating-point FFT and sensor-fusion math directly, while 512 KB Flash accommodates over-the-air (OTA) dual-image bootloaders. The 64-QFN exposes 5 UART channels for multi-protocol bridging. Wake-up in 3 us from deep sleep enables aggressive duty-cycling for multi-year coin-cell deployments.
Được đề xuất
Bluetooth Audio Dongle
Used as the USB host and audio routing MCU in a USB-to-Bluetooth audio dongle, the ATSAMG55J19A-MU manages USB enumeration, SBC/AAC encode, and forwards PCM to a co-processor over I2S. The Cortex-M4F handles USB host stack plus encoding without external DSP, and the integrated FPU accelerates audio codec math. Up to 176 KB SRAM is sufficient for USB + audio buffering. Power consumption stays low enough for bus-powered dongle operation from a single 5 V USB rail.
Được đề xuất
IoT Edge Node with USB Diagnostics
The ATSAMG55J19A-MU's USB 2.0 FS device interface makes it well suited to industrial IoT edge nodes that expose a USB diagnostic port for firmware updates, log capture, and field configuration. The 120 MHz Cortex-M4F runs TCP/IP stacks or MQTT-SN over UART-to-modem, while USB is reserved for service access. The QFN package and picoPower consumption enable sealed IP65 enclosures with single-cell Li-ion battery support. Real-time clock with calendar aids timestamping of field data.
Được đề xuất
USB Headphones and Headsets
In USB stereo headphones the ATSAMG55J19A-MU implements USB isochronous endpoints, sample-rate conversion, and digital volume control. The I2S bus feeds an external DAC that drives the headphone amplifier. Cortex-M4F DSP handles parametric EQ, limiter, and bass-boost algorithms without overloading the USB isochronous budget. Up to 176 KB SRAM hosts USB isochronous ping-pong buffers and audio frame processing buffers simultaneously. Industrial temp range suits consumer and prosumer audio products.
Được đề xuất
Low-Power Consumer Audio Product
Battery-powered speakers, dictation devices, and voice memo recorders benefit from the ATSAMG55J19A-MU's picoPower consumption profile. Active current of 100 uA/MHz plus deep sleep below 7 uA with full SRAM retention enables weeks of standby on a single Li-ion cell. The Cortex-M4F at 120 MHz executes MP3/WAV decode or simple voice-trigger wake-word detection. USB charging and I2S playback share a single MCU, eliminating an external PMIC in many designs.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAMG55J19A-MU — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | ATSAMG55J19A-MUT | ATSAMG55J19B-MU | ATSAMG55J19B-MUT | ATSAMG55J19A-AU |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-QFN (7.5x7.5 mm) | 64-QFN (7.5x7.5 mm) - same | 64-QFN (7.5x7.5 mm) - same | 64-QFN (7.5x7.5 mm) - same | 64-LQFP (different footprint) |
| Core | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz |
| Flash | 512 KB | 512 KB | 512 KB | 512 KB | 512 KB |
| SRAM | 176 KB | 176 KB | 176 KB | 176 KB | 176 KB |
| USB | USB 2.0 FS + PHY | USB 2.0 FS + PHY | USB 2.0 FS + PHY | USB 2.0 FS + PHY | USB 2.0 FS + PHY |
| I2S / TDM | 2 instances | 2 instances | 2 instances | 2 instances | 2 instances |
| Silicon Revision | G55 Rev A | G55 Rev A | G55 Rev B (errata-fixed) | G55 Rev B (errata-fixed) | G55 Rev A |
| Active Current | 100 uA/MHz | 100 uA/MHz | 100 uA/MHz | 100 uA/MHz | 100 uA/MHz |
Bảo phân biệt quan trọng
- Integrated USB 2.0 Full-Speed PHY eliminates external PHY chip (vsGeneric Cortex-M4 MCU (e.g., STM32F401 without USB FS))
- Dual I2S/TDM interfaces for multi-channel audio (vsSingle I2S interface (typical Cortex-M4 MCU))
- picoPower technology: 100 uA/MHz active, <7 uA deep sleep (vsHigher-power Cortex-M4 alternatives (e.g., STM32F4 at ~250 uA/MHz))
Ghi chú thiết kế
Estimated: at 120 MHz CPU active, VDDIN=3.3 V, the SAM G55 draws ~12 mA core current plus peripheral current. Add a 100 nF X7R ceramic bypass capacitor directly at each VDDIO pin and a 4.7 uF X5R bulk capacitor at the VDDIN/VDDCORE regulator output. Place ceramics within 2 mm of the supply pin traces. The integrated LDO for VDDCORE typically requires 1 uF at its output for stable regulation; consult the full datasheet for the recommended BOM.
The 64-QFN (7.5x7.5 mm) exposed pad (EP) is the thermal dissipation path and MUST be soldered to a continuous ground-plane land of at least 1:1 ratio to the EP. Use an array of thermal vias (0.3 mm drill, 0.5 mm pitch) under the EP to stitch inner ground layers. Without proper EP soldering, junction temperature rises 20-30 C above ambient at full CPU load, potentially triggering thermal shutdown.
Microchip recommends Revision B (ATSAMG55J19B) for all new designs because Revision A silicon has published errata affecting USB suspend/resume and I2S underflow handling. If you are maintaining an existing ATSAMG55J19A-MU design, review the silicon errata document before migrating firmware. The boot mode select (BMS) pin must be sampled correctly at reset for the part to enter bootloader mode; use a 100 kOhm pull-down on BMS for production.
Place the 12 MHz external crystal (or HSE oscillator) within 5 mm of the XIN/XOUT pins with symmetrical traces and a guard ground ring. The USB DP/DM traces must be routed as a 90-ohm differential pair with length matching within 2 mm, and should not cross any other signal traces. Keep the USB PHY analog ground island isolated from digital switching ground and stitch them only at the EP ground plane.
Thông tin tuân thủ
RoHS and lead-free per Microchip product page; AEC-Q100 not applicable (industrial-grade MCU, not automotive qualified).
