ATSAMG55J19B-AUT - ARM Cortex-M4 MCU 120MHz 512KB LQFP-64
料号： ATSAMG55J19B-AUT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $8.85 | $8.85 |
| 10 | $7.96 | $79.60 |
| 100 | $6.78 | $678.00 |
| 500 | $6.05 | $3,025.00 |
| 1,000 | $5.42 | $5,420.00 |
ATSAMG55J19B-AUT 概述
A 32-bit microcontroller (MCU) is a system-on-chip that integrates a CPU core, program memory, data memory, and a rich peripheral set into a single IC. The ARM Cortex-M4 architecture belongs to the Cortex-M family of low-power, deterministic processor cores designed for embedded and real-time applications; when augmented with an FPU it can execute single-precision floating-point instructions natively, which accelerates digital signal processing (DSP) and audio algorithm tasks without burdening the CPU with software emulation. Within Microchip's product hierarchy this part sits inside the SAM family -> Cortex-M4 class -> performance-oriented sub-family with FPU, supporting the broader Atmel/Microchip ecosystem including the SAM4S, SAM D5x/E5x, and SAME70 lines.
Key features include a Cortex-M4 core with FPU, 120 MHz maximum clock speed, 512 KB Flash, 176 KB SRAM, 16-bit PWM timers, an I2S digital audio interface, a full-speed USB 2.0 device/host with on-chip PHY, a 12-bit ADC, and flexible serial peripherals (USART, SPI, TWI/I2C). Power-saving features include Sleep, Wait, and Backup modes plus a low-power RTC. These attributes make the SAM G55 a strong fit for connected audio, sensor hubs, and industrial control applications.
The SAM G55 silicon uses a Cortex-M4 with Thumb-2 instruction set, hardware single-cycle multiply-accumulate, and a tightly-coupled SRAM block for deterministic interrupt latency. The 120 MHz clock supports 1.25 DMIPS/MHz (1.50 DMIPS/MHz with the optional FPU DSP extensions) per the Dhrystone benchmark, and the wide peripheral DMA architecture enables high-throughput data movement between I2S, USB, ADC, and SRAM without CPU intervention.
Typical applications include USB audio headsets, smart speakers, voice-controlled appliances, industrial sensor hubs, HMI controllers, and wireless audio base stations. The wide operating temperature range and tape-and-reel packaging further support deployment in mass-produced industrial and consumer audio products.
When designing with the ATSAMG55J19B-AUT, plan the PCB layout for proper USB impedance control (90 ohm differential), keep the VDDCORE decoupling within 5 mm of the LQFP-64 pin, and use the on-chip FPU instead of software floating-point libraries to maximize throughput for DSP workloads.
This page synthesizes distributor pricing, drop-in alternatives from the SAM G55 series and cross-brand Cortex-M4 candidates, plus practical design notes that go beyond the manufacturer datasheet summary to help engineers select and qualify this MCU.
直接替换替代料： ATSAMG55J19B-AUT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ATSAMG55J19B-AUT （相同外形与封装尺寸） ——差异在于 Package, ADC, Core Architecture, Operating Temperature, SRAM.
快速对比工具——选择替代料号进行并排对比：
ATSAMG55J19B-AU
✅ 直接替换📋 参考替代料（不在目录中）
ATSAMG55J19A-AUT
✅ 直接替换📋 参考替代料（不在目录中）
ATSAMG55J19A-AU
✅ 直接替换✓ 有现货
$3.99 / 个
查看数据手册 →ATSAME53N19A-AU
✅ 直接替换✓ 有现货
$5.4 / 个
查看数据手册 →ATSAME54P19A-AU
✅ 直接替换✓ 有现货
$8.35 / 个
查看数据手册 →STM32F411CEU6
✅ 直接替换✓ 有现货
$3.48 / 个
查看数据手册 →ATSAMG55J19B-AUT 最大额定值与电气特性
| Core Architecture | ARM Cortex-M4 with single-precision FPU |
| 最大时钟频率 | 120 MHz |
| Program Memory (Flash) | 512 KB (512K x 8) |
| SRAM | 176 KB |
| Operating Voltage Range | 1.62 V to 3.6 V |
| 封装 | 64-pin LQFP (10x10 mm) |
| 安装类型 | Surface Mount |
| 工作温度范围 | -40C to +85C (Industrial) |
| 数据总线宽度 | 32-bit |
| Number of I/O Pins | Up to 47 (per datasheet) |
| USB Interface | USB 2.0 Full-Speed Device/Host with on-chip PHY |
| Audio Interface | I2S (digital audio) |
| ADC | 12-bit, 16-channel (per datasheet) |
| Timers/PWM | 16-bit timers, PWM channels (per datasheet) |
| Communication Peripherals | USART, SPI, TWI/I2C |
| DMA | Peripheral DMA controller |
| RoHS 状态 | Compliant |
| Delivery Form | Tape & Reel (AUT suffix) |
| Series | SAM G55 |
| Silicon Revision | B |
ATSAMG55J19B-AUT 引脚配置
| 引脚 1 | PB0 — GPIO / peripheral function |
| 引脚 2 | PB1 — GPIO / peripheral function |
| 引脚 3 | PB2 — GPIO / peripheral function |
| 引脚 4 | PB3 — GPIO / peripheral function |
| 引脚 5 | VDDIO — I/O supply voltage (1.62 V to 3.6 V) |
| 引脚 6 | VSS — Ground |
| 引脚 7 | PB4 — GPIO / peripheral function |
| 引脚 8 | PB5 — GPIO / peripheral function |
| 引脚 9 | PB6 — GPIO / peripheral function |
| 引脚 10 | PB7 — GPIO / peripheral function |
| 引脚 11 | PB8 — GPIO / peripheral function |
| 引脚 12 | PB9 — GPIO / peripheral function |
| 引脚 13 | PB10 — GPIO / peripheral function |
| 引脚 14 | PB11 — GPIO / peripheral function |
| 引脚 15 | PA0 — GPIO / peripheral function |
| 引脚 16 | PA1 — GPIO / peripheral function |
| 引脚 17 | PA2 — GPIO / peripheral function |
| 引脚 18 | PA3 — GPIO / peripheral function |
| 引脚 19 | PA4 — GPIO / peripheral function |
| 引脚 20 | PA5 — GPIO / peripheral function |
| 引脚 21 | PA6 — GPIO / peripheral function |
| 引脚 22 | PA7 — GPIO / peripheral function |
| 引脚 23 | PA8 — GPIO / peripheral function |
| 引脚 24 | PA9 — GPIO / peripheral function |
| 引脚 25 | PA10 — GPIO / peripheral function |
| 引脚 26 | PA11 — GPIO / peripheral function |
| 引脚 27 | PA12 — GPIO / peripheral function |
| 引脚 28 | PA13 — GPIO / peripheral function |
| 引脚 29 | PA14 — GPIO / peripheral function |
| 引脚 30 | PA15 — GPIO / peripheral function |
| 引脚 31 | PA16 — GPIO / peripheral function |
| 引脚 32 | PA17 — GPIO / peripheral function |
| 引脚 33 | PA18 — GPIO / peripheral function |
| 引脚 34 | PA19 — GPIO / peripheral function |
| 引脚 35 | PA20 — GPIO / peripheral function |
| 引脚 36 | PA21 — GPIO / peripheral function |
| 引脚 37 | PA22 — GPIO / peripheral function |
| 引脚 38 | PA23 — GPIO / peripheral function |
| 引脚 39 | PA24 — GPIO / peripheral function |
| 引脚 40 | PA25 — GPIO / peripheral function |
| 引脚 41 | PA26 — GPIO / peripheral function |
| 引脚 42 | PA27 — GPIO / peripheral function |
| 引脚 43 | PA28 — GPIO / peripheral function |
| 引脚 44 | PA29 — GPIO / peripheral function |
| 引脚 45 | PA30 — GPIO / peripheral function |
| 引脚 46 | PA31 — GPIO / peripheral function |
| 引脚 47 | VDDCORE — Core voltage (1.2 V nominal, internally regulated) |
| 引脚 48 | VSS — Ground |
| 引脚 49 | NRST — Reset (active low) |
| 引脚 50 | SWDIO — Serial Wire Debug I/O |
| 引脚 51 | SWCLK — Serial Wire Debug Clock |
| 引脚 52 | XIN — Crystal oscillator input |
| 引脚 53 | XOUT — Crystal oscillator output |
| 引脚 54 | VDDPLL — PLL supply voltage |
| 引脚 55 | VSS — Ground |
| 引脚 56 | HDP — USB host/device data plus |
| 引脚 57 | HDM — USB host/device data minus |
| 引脚 58 | VBUS — USB VBUS sense |
| 引脚 59 | VDDIO — I/O supply voltage |
| 引脚 60 | VSS — Ground |
| 引脚 61 | PC0 — GPIO / peripheral function |
| 引脚 62 | PC1 — GPIO / peripheral function |
| 引脚 63 | PC2 — GPIO / peripheral function |
| 引脚 64 | PC3 — GPIO / peripheral function |
典型应用
ATSAMG55J19B-AUT 适用于 7 应用s: USB Audio Headsets and Dongles, Smart Speakers and Voice Control Appliances, Industrial Sensor Hubs and Data Acquisition, Human-Machine Interface (HMI) Controllers, USB-Based Test and Measurement Instruments, Wireless Audio Receiver Base Stations, Connected LED Lighting and DMX Controllers.
USB Audio Headsets and Dongles
The ATSAMG55J19B-AUT is purpose-built for USB audio headsets and USB-to-I2S dongles because it integrates a USB 2.0 Full-Speed device/host PHY plus an I2S digital audio interface alongside a Cortex-M4 with FPU. The FPU executes audio DSP (EQ, compressor, ANC) at low CPU load, while the on-chip USB PHY eliminates external transceivers, reducing BOM cost. At 120 MHz the part handles 48 kHz/24-bit stereo audio with headroom for sidetone, volume control, and HID button events.
推荐
Smart Speakers and Voice Control Appliances
The ATSAMG55J19B-AUT suits smart speakers and voice-controlled appliances by combining a fast 120 MHz Cortex-M4F, large 176 KB SRAM for keyword buffers, and the I2S interface for digital microphone arrays. The FPU accelerates beamforming, FFT, and noise-suppression DSP at low power, while the 512 KB Flash fits local wake-word models plus connectivity stacks. Wide 1.62 V to 3.6 V supply lets the MCU run directly from a 3.3 V system rail or Li-ion battery.
推荐
Industrial Sensor Hubs and Data Acquisition
The ATSAMG55J19B-AUT works well as an industrial sensor hub because it provides a 12-bit ADC, multiple USART/SPI/TWI interfaces, and a peripheral DMA controller to stream sensor data into SRAM without CPU intervention. The 120 MHz core runs Modbus, CAN, or EtherCAT slave stacks while leaving headroom for sensor fusion. Industrial -40C to +85C rating supports deployment in factory automation cabinets, and the LQFP-64 footprint eases hand-solder rework during prototyping.
推荐
Human-Machine Interface (HMI) Controllers
The ATSAMG55J19B-AUT drives small HMI panels by combining its 120 MHz Cortex-M4F for graphics rendering with multiple SPI/USART channels for display and touch controllers. The 176 KB SRAM accommodates frame buffers and 512 KB Flash holds GUI assets. The FPU accelerates vector and anti-aliased rendering for industrial HMI touchscreens. Industrial temperature rating and LQFP-64 footprint simplify PCB design for panel-mount controllers.
推荐
USB-Based Test and Measurement Instruments
The ATSAMG55J19B-AUT is a strong fit for USB test instruments because it integrates a USB 2.0 Full-Speed device PHY and a 12-bit ADC, allowing direct USB streaming of digitized signals at up to 1 MSPS. The 120 MHz Cortex-M4F runs calibration, FFT, and protocol decoding, while 176 KB SRAM buffers waveform captures. Industrial temperature range and 64-LQFP footprint ease enclosure integration for portable benchtop tools.
推荐
Wireless Audio Receiver Base Stations
The ATSAMG55J19B-AUT serves wireless audio receiver base stations where Bluetooth or proprietary 2.4 GHz radios feed I2S data into the MCU for processing and routing. The I2S interface accepts up to 192 kHz / 32-bit streams from external radio modules, the FPU runs audio post-processing, and USB Host mode supports USB mass-storage playback of local audio files. Wide supply range lets the MCU run directly from a 3.3 V regulated rail.
推荐
Connected LED Lighting and DMX Controllers
The ATSAMG55J19B-AUT drives connected LED lighting systems by using its multiple PWM channels for color-mixing, plus USART for DMX512 / Art-Net protocol bridging. The 120 MHz Cortex-M4F executes gamma correction and color-space conversion natively, while 176 KB SRAM handles LED frame buffers. Industrial temperature rating supports outdoor luminaire designs, and the 64-LQFP package enables compact driver PCB layouts.
推荐
推荐产品汇总
工程参考数据： ATSAMG55J19B-AUT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ATSAMG55J19B-AU | ATSAMG55J19A-AUT | ATSAME53N19A-AU | ATSAME54P19A-AU | STM32F411CEU6 |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | STMicroelectronics |
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same |
| Core | ARM Cortex-M4F | ARM Cortex-M4F | ARM Cortex-M4F | ARM Cortex-M4F | ARM Cortex-M4F | ARM Cortex-M4F |
| Max Clock Frequency | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 100 MHz |
| Flash Memory | 512 KB | 512 KB | 512 KB | 512 KB | 512 KB | 512 KB |
| SRAM | 176 KB | 176 KB | 176 KB | 192 KB | 192 KB | 128 KB |
| USB PHY | USB 2.0 Full-Speed on-chip | USB 2.0 Full-Speed on-chip | USB 2.0 Full-Speed on-chip | USB 2.0 Full-Speed on-chip | USB 2.0 Full-Speed on-chip | USB 2.0 Full-Speed on-chip |
| I2S Audio Interface | Yes (hardware I2S) | Yes | Yes | Yes (I2S with PDM) | Yes (I2S with PDM) | Yes (I2S, partial) |
| Operating Voltage | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.7 V to 3.6 V |
| Delivery Form | Tape & Reel (AUT) | Tray (AU) | Tape & Reel (AUT) | Tray (AU) | Tray (AU) | Tray |
关键差异点
- On-chip USB 2.0 Full-Speed PHY （对比 ATSAM4S16CA-AU)
- Integrated hardware I2S digital audio interface （对比 ATSAM4S16CA-AU)
- Cortex-M4F with FPU for DSP workloads （对比 STM32F411CEU6)
- Drop-in compatibility with SAM G55 family （对比 ATSAMG55J19A-AUT)
设计说明
Place a 100 nF decoupling capacitor as close as possible (within 3 mm) to each VDDIO and VDDCORE pin. Add a bulk 4.7 uF ceramic capacitor near the main VDDIO supply pin. Per Microchip's SAM G55 hardware design guide, the high-frequency decoupling network keeps core voltage ripple below 50 mVpp at 120 MHz operation. Route all power traces at least 0.5 mm wide to limit DC drop during USB current peaks.
For USB applications, maintain 90 ohm differential impedance between the HDP and HDM pins and the USB connector. Per the SAM G55 datasheet, the trace length matching should be within 150 mil (3.8 mm), and the ESD protection diode should be placed within 3 mm of the connector. Keep the USB differential pair away from clock lines and switching power supplies to meet USB 2.0 Full-Speed signal-integrity masks.
Do not skip the 12 MHz external crystal on XIN/XOUT even when using the internal 12 MHz RC oscillator - the USB Full-Speed PHY requires the accurate external clock reference for USB compliance. The NRST pin must be pulled up to VDDIO with a 10 kohm resistor and decoupled with 100 nF to ground for reliable reset behavior. When migrating from SAM G55 A-revision to B-revision silicon, review errata document for any peripheral timing changes.
Keep SWDIO and SWCLK traces short (under 50 mm) and away from high-current switching signals. Add 100 kohm pull-ups on SWDIO and NRST for robust debugger connection. When using trace debugging via SWO, ensure the SWO pin has a 50 ohm series termination to minimize reflections on the trace output.
合规信息
RoHS and REACH compliance per Microchip product page. AEC-Q100 not applicable for industrial-grade part; AEC-Q100 qualified variants would be in a different ordering code.
