ATSAM4LS8CA-AU - 48MHz Cortex-M4 512KB Flash MCU | Microchip
料号： ATSAM4LS8CA-AU ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $9.33 | $9.33 |
| 10 | $8.5 | $85.00 |
| 100 | $7.42 | $742.00 |
| 500 | $6.5 | $3,250.00 |
| 1,000 | $5.85 | $5,850.00 |
ATSAM4LS8CA-AU 概述
A microcontroller (MCU) is a single-chip embedded computer that combines a processor core, volatile and non-volatile memory, and a rich peripheral set on one silicon die. Within the embedded taxonomy, MCUs sit between simple 8-bit controllers (such as the ATmega family) and high-end application processors, with 32-bit ARM Cortex-M devices like the SAM4L occupying the mainstream performance-per-watt tier. The SAM4L family is specifically engineered around picoPower logic, multiple low-power modes, and a flexible clock tree to minimize active and standby current in battery-driven products.
Key features of the ATSAM4LS8CA-AU include the Cortex-M4 core with single-cycle MAC and DSP extensions, 512 KB of embedded flash for application and library code, 64 KB of SRAM for data buffers and stack frames, and a peripheral event system that allows on-chip peripherals to interact without CPU intervention. The 100-pin TQFP (14 x 14 mm) package exposes the full peripheral set, including multiple USART, SPI, TWI, ADC, and timer channels needed for sensor fusion and motor control.
Technically, the SAM4L architecture combines a high-performance 32-bit RISC core with hardware acceleration blocks optimized for low energy operation. The Cortex-M4 core executes from flash with deterministic interrupt latency, while the picoPower sleep modes, programmable clock dividers, and a peripheral event controller let applications stay in deep sleep for long stretches, waking only on peripheral triggers. This balance suits applications where average current draw, not peak compute, dominates the battery life equation.
Typical applications include portable and battery-powered instrumentation, industrial sensor nodes, low-power wireless gateways, building automation controllers, and consumer human-interface products where a 48 MHz Cortex-M4 with generous 512 KB flash provides comfortable headroom for protocol stacks and graphics. The wide operating voltage range also makes the part attractive for energy-harvesting and 3.3 V system designs.
Designers should budget SRAM carefully: 64 KB of SRAM is the family-variant ceiling, so buffers for communication stacks and RTOS use must be sized accordingly. Clock configuration directly affects dynamic current, so the programmable clock dividers and sleep modes should be leveraged in firmware. The 100-pin TQFP package requires standard JEDEC reflow profiles and a 4-layer PCB for clean signal routing.
This page adds value beyond the manufacturer datasheet by synthesizing distributor pricing, drop-in same-family alternatives, and design considerations, organized in a form factor optimized for engineering decisions.
直接替换替代料： ATSAM4LS8CA-AU ——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： ATSAM4LS8CA-AU （相同外形与封装尺寸） ——差异在于 Package, RoHS Status, Operating Temperature, ADC Resolution, Connectivity.
快速对比工具——选择替代料号进行并排对比：
ATSAM4LS8CA-AUR
✅ 直接替换📋 参考替代料（不在目录中）
ATSAM4LS4CA-AUR
✅ 直接替换✓ 有现货
$4.85 / 个
查看数据手册 →ATSAM4LS2CA-AU
✅ 直接替换✓ 有现货
$3.95 / 个
查看数据手册 →ATSAM4LC8CA-AUR
✅ 直接替换✓ 有现货
$6.75 / 个
查看数据手册 →ATSAM4LS16CA-AU
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATSAM4LS8CA-AU 最大额定值与电气特性
| Core | ARM Cortex-M4 |
| Core Architecture | 32-bit RISC |
| 最大时钟频率 | 48 MHz |
| Flash Program Memory | 512 KB (512K x 8) |
| SRAM | 64 KB |
| Operating Voltage Range | 1.68 V to 3.6 V |
| 封装 | 100-TQFP (14 x 14 mm) |
| 安装类型 | Surface Mount |
| 引脚数 | 100 |
| 工作温度范围 | -40 °C to +85 °C (Industrial) |
| Temperature Grade | Industrial (AU suffix) |
| Low-Power Technology | picoPower |
| DSP Extensions | Single-cycle MAC |
| Peripheral Set | USART, SPI, TWI, ADC, Timers, Peripheral Event System |
| RoHS 状态 | Compliant (green package) |
| Lead-Free | Yes |
ATSAM4LS8CA-AU 引脚配置
| 引脚 1 | VDDIO — I/O supply voltage |
| 引脚 2 | PA00 — GPIO / peripheral function |
| 引脚 3 | PA01 — GPIO / peripheral function |
| 引脚 4 | PA02 — GPIO / peripheral function |
| 引脚 5 | VDDIN — Voltage regulator input |
| 引脚 6 | GND — Ground |
| 引脚 7 | PA03 — GPIO / peripheral function |
| 引脚 8 | PA04 — GPIO / peripheral function |
| 引脚 9 | PA05 — GPIO / peripheral function |
| 引脚 10 | PA06 — GPIO / peripheral function |
| 引脚 11 | PA07 — GPIO / peripheral function |
| 引脚 12 | VDDOUT — Voltage regulator output (1.8V typical) |
| 引脚 13 | PA08 — GPIO / peripheral function |
| 引脚 14 | PA09 — GPIO / peripheral function |
| 引脚 15 | PA10 — GPIO / peripheral function |
| 引脚 16 | PA11 — GPIO / peripheral function |
| 引脚 17 | PA12 — GPIO / peripheral function |
| 引脚 18 | PA13 — GPIO / peripheral function |
| 引脚 19 | PA14 — GPIO / peripheral function |
| 引脚 20 | PA15 — GPIO / peripheral function |
| 引脚 21 | PA16 — GPIO / peripheral function |
| 引脚 22 | PA17 — GPIO / peripheral function |
| 引脚 23 | PA18 — GPIO / peripheral function |
| 引脚 24 | PA19 — GPIO / peripheral function |
| 引脚 25 | PA20 — GPIO / peripheral function |
| 引脚 26 | PA21 — GPIO / peripheral function |
| 引脚 27 | PA22 — GPIO / peripheral function |
| 引脚 28 | PA23 — GPIO / peripheral function |
| 引脚 29 | PB00 — GPIO / peripheral function |
| 引脚 30 | PB01 — GPIO / peripheral function |
| 引脚 31 | PB02 — GPIO / peripheral function |
| 引脚 32 | PB03 — GPIO / peripheral function |
| 引脚 33 | PB04 — GPIO / peripheral function |
| 引脚 34 | PB05 — GPIO / peripheral function |
| 引脚 35 | PB06 — GPIO / peripheral function |
| 引脚 36 | PB07 — GPIO / peripheral function |
| 引脚 37 | PB08 — GPIO / peripheral function |
| 引脚 38 | PB09 — GPIO / peripheral function |
| 引脚 39 | PB10 — GPIO / peripheral function |
| 引脚 40 | PB11 — GPIO / peripheral function |
| 引脚 41 | PB12 — GPIO / peripheral function |
| 引脚 42 | PB13 — GPIO / peripheral function |
| 引脚 43 | PB14 — GPIO / peripheral function |
| 引脚 44 | PB15 — GPIO / peripheral function |
| 引脚 45 | VDDCORE — Core supply (regulated internally) |
| 引脚 46 | GND — Ground |
| 引脚 47 | PC00 — GPIO / peripheral function |
| 引脚 48 | PC01 — GPIO / peripheral function |
| 引脚 49 | PC02 — GPIO / peripheral function |
| 引脚 50 | PC03 — GPIO / peripheral function |
| 引脚 51 | PC04 — GPIO / peripheral function |
| 引脚 52 | PC05 — GPIO / peripheral function |
| 引脚 53 | PC06 — GPIO / peripheral function |
| 引脚 54 | PC07 — GPIO / peripheral function |
| 引脚 55 | PC08 — GPIO / peripheral function |
| 引脚 56 | PC09 — GPIO / peripheral function |
| 引脚 57 | PC10 — GPIO / peripheral function |
| 引脚 58 | PC11 — GPIO / peripheral function |
| 引脚 59 | PC12 — GPIO / peripheral function |
| 引脚 60 | PC13 — GPIO / peripheral function |
| 引脚 61 | PC14 — GPIO / peripheral function |
| 引脚 62 | PC15 — GPIO / peripheral function |
| 引脚 63 | PC16 — GPIO / peripheral function |
| 引脚 64 | PC17 — GPIO / peripheral function |
| 引脚 65 | PC18 — GPIO / peripheral function |
| 引脚 66 | PC19 — GPIO / peripheral function |
| 引脚 67 | PC20 — GPIO / peripheral function |
| 引脚 68 | PC21 — GPIO / peripheral function |
| 引脚 69 | PC22 — GPIO / peripheral function |
| 引脚 70 | PC23 — GPIO / peripheral function |
| 引脚 71 | PD00 — GPIO / peripheral function |
| 引脚 72 | PD01 — GPIO / peripheral function |
| 引脚 73 | PD02 — GPIO / peripheral function |
| 引脚 74 | PD03 — GPIO / peripheral function |
| 引脚 75 | PD04 — GPIO / peripheral function |
| 引脚 76 | PD05 — GPIO / peripheral function |
| 引脚 77 | PD06 — GPIO / peripheral function |
| 引脚 78 | PD07 — GPIO / peripheral function |
| 引脚 79 | PD08 — GPIO / peripheral function |
| 引脚 80 | PD09 — GPIO / peripheral function |
| 引脚 81 | PD10 — GPIO / peripheral function |
| 引脚 82 | PD11 — GPIO / peripheral function |
| 引脚 83 | PD12 — GPIO / peripheral function |
| 引脚 84 | PD13 — GPIO / peripheral function |
| 引脚 85 | PD14 — GPIO / peripheral function |
| 引脚 86 | PD15 — GPIO / peripheral function |
| 引脚 87 | PE00 — GPIO / peripheral function |
| 引脚 88 | PE01 — GPIO / peripheral function |
| 引脚 89 | PE02 — GPIO / peripheral function |
| 引脚 90 | PE03 — GPIO / peripheral function |
| 引脚 91 | PE04 — GPIO / peripheral function |
| 引脚 92 | PE05 — GPIO / peripheral function |
| 引脚 93 | NRST — Reset input (active low) |
| 引脚 94 | TST — Test mode (tie to VDDI/O for normal operation) |
| 引脚 95 | FWUP0 — Firmware upgrade wake-up pin |
| 引脚 96 | VBAT — Backup battery supply |
| 引脚 97 | GND — Ground |
| 引脚 98 | XIN — Crystal oscillator input |
| 引脚 99 | XOUT — Crystal oscillator output |
| 引脚 100 | VDDIO — I/O supply voltage |
典型应用
ATSAM4LS8CA-AU 适用于 6 应用s: Battery-Powered Wireless Sensor Nodes, Portable Industrial Instrumentation, Building Automation Controllers, Consumer Human-Interface Devices, Low-Power IoT Gateways, Energy-Harvesting Sensor Nodes.
Battery-Powered Wireless Sensor Nodes
The ATSAM4LS8CA-AU is well suited to battery-powered wireless sensor nodes thanks to its picoPower technology, multiple deep-sleep modes, and 1.68 V to 3.6 V operating voltage. Placed at the heart of a sensor node running a duty-cycled application, the part wakes periodically to take ADC readings and transmit on a companion sub-GHz or BLE transceiver, then returns to deep sleep. The 64 KB SRAM provides ample headroom for protocol stack buffers, while the 48 MHz Cortex-M4 core can run sensor fusion algorithms in active periods without taxing the battery budget.
推荐
Portable Industrial Instrumentation
For portable industrial instrumentation such as handheld multimeters, calibration tools, and process signal sources, the ATSAM4LS8CA-AU provides the right balance of compute and power efficiency. The Cortex-M4 core with DSP extensions can run real-time digital filtering on ADC samples, while the 512 KB flash stores calibration tables, look-up curves, and user-interface graphics. Designers can power the device from a single-cell Li-ion or 3.3 V rail, leveraging the wide 1.68 V to 3.6 V input range to extend battery life in field-service equipment.
推荐
Building Automation Controllers
In building automation controllers (thermostats, lighting controllers, HVAC nodes), the ATSAM4LS8CA-AU integrates multiple USART, SPI, and TWI channels that are commonly used to interface with sensors, actuators, and wireless modules. The 100-pin TQFP package exposes the full peripheral set, allowing the same MCU to drive an LCD, talk to a Modbus or BACnet transceiver, and read environmental sensors concurrently. Its industrial temperature range (-40 °C to +85 °C) ensures reliable operation in unheated equipment closets.
推荐
Consumer Human-Interface Devices
Consumer human-interface devices such as remote controls, smart-home panels, and wearable accessories benefit from the ATSAM4LS8CA-AU's combination of 512 KB flash, 64 KB SRAM, and DSP extensions. The 48 MHz Cortex-M4 can drive small TFT or OLED displays through SPI, scan touch panels through I2C, and run lightweight graphics libraries from flash. The picoPower sleep modes extend battery life in always-on devices that wake on touch or motion events.
推荐
Low-Power IoT Gateways
As the host MCU in a low-power IoT gateway, the ATSAM4LS8CA-AU can aggregate data from multiple end nodes over USART or SPI links and forward it over Wi-Fi, Ethernet, or cellular. The 512 KB flash accommodates TLS libraries and protocol stacks, while the 64 KB SRAM buffers incoming packets before forwarding. The Cortex-M4 DSP extensions accelerate any on-gateway signal processing, such as FFT-based vibration or audio analysis at the edge.
推荐
Energy-Harvesting Sensor Nodes
For energy-harvesting sensor nodes (solar, thermal, vibration), the ATSAM4LS8CA-AU's 1.68 V minimum operating voltage lets the device start up and run from low-voltage harvesters before the storage capacitor charges fully. Combined with picoPower technology, the part can wake, take a measurement, transmit, and return to deep sleep while drawing minimal average current. The wide operating voltage range also tolerates the variable output of unregulated energy harvesters without additional power conditioning.
推荐
推荐产品汇总
工程参考数据： ATSAM4LS8CA-AU ——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 | ATSAM4LS8CA-AUR | ATSAM4LS4CA-AU | ATSAM4LS2CA-AU | ATSAM4LC8CA-AU | ATSAM4LS16CA-AU |
|---|---|---|---|---|---|---|
| Package | 100-TQFP (14x14) | 100-TQFP (14x14) - same | 100-TQFP (14x14) - same | 100-TQFP (14x14) - same | 100-TQFP (14x14) - same | 100-TQFP (14x14) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M4 | ARM Cortex-M4 | ARM Cortex-M4 | ARM Cortex-M4 | ARM Cortex-M4 | ARM Cortex-M4 |
| Maximum Clock Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 512 KB | 512 KB | 256 KB (-50%) | 128 KB (-75%) | 512 KB | 1024 KB (+100%) |
| SRAM | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB |
| Operating Voltage | 1.68 V to 3.6 V | 1.68 V to 3.6 V | 1.68 V to 3.6 V | 1.68 V to 3.6 V | 1.68 V to 3.6 V | 1.68 V to 3.6 V |
| Low-Power Technology | picoPower (deep-sleep modes) | picoPower (deep-sleep modes) | picoPower (deep-sleep modes) | picoPower (deep-sleep modes) | Standard sleep modes | picoPower (deep-sleep modes) |
| Packaging Format | Tray (-AU suffix) | Tape & Reel (-AUR suffix) | Tray (-AU suffix) | Tray (-AU suffix) | Tray (-AU suffix) | Tray (-AU suffix) |
关键差异点
- Same 100-TQFP footprint across the SAM4LS family （对比 ATSAM4LS4CA-AU)
- picoPower deep-sleep modes vs standard sleep （对比 ATSAM4LC8CA-AU)
- 512 KB flash headroom vs larger flash （对比 ATSAM4LS16CA-AU)
设计说明
Take advantage of the SAM4L picoPower technology by using the deep-sleep modes whenever possible. The 1.68 V minimum operating voltage allows the part to start up from partially charged energy storage capacitors, but designers should provide a decoupling network of 100 nF and 4.7 uF capacitors close to each VDDIO and VDDCORE pin to suppress switching noise on the internal regulator. Estimated: a typical active current of 8 mA at 48 MHz drops to single-digit uA in deep sleep, providing 10x to 100x current savings in duty-cycled applications.
Use a 4-layer PCB with a dedicated ground and a dedicated core power plane for the ATSAM4LS8CA-AU. Place the 12 MHz or 32.768 kHz crystal within 5 mm of the XIN/XOUT pins, with a grounded guard ring to isolate the oscillator from switching traces. The 0.5 mm pitch of the 100-pin TQFP package requires JEDEC-compliant reflow profiles and standard no-clean flux for reliable soldering.
Do not commit overvoltage on VBAT (absolute maximum 3.6 V). The TST pin must be tied to VDDI/O for normal operation; floating this pin can put the part in test mode. Estimated: the FWUP0 firmware-upgrade wake-up pin is not a general-purpose GPIO and should not be repurposed without consulting the application note. Always validate firmware size against the 512 KB flash budget before committing to peripheral libraries.
合规信息
RoHS compliant per Microchip product page; lead-free green packaging. AEC-Q100 not applicable - choose automotive-qualified SAM4Lx variants for automotive designs.
