ATSAM3N1CB-AU - 48MHz Cortex-M3 MCU 64KB Flash | Microchip
料号： ATSAM3N1CB-AU ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.22 | $0.22 |
| 10 | $0.2 | $2.00 |
| 100 | $0.18 | $18.00 |
| 500 | $0.18 | $90.00 |
| 1,000 | $0.18 | $180.00 |
ATSAM3N1CB-AU 概述
A microcontroller (MCU) is a single-chip computer that integrates a processor core, program memory, data memory, and peripheral interfaces such as UART, SPI, and I2C. The SAM3N family sits within the broader hierarchy of 32-bit MCUs based on the ARM Cortex-M3 RISC processor, a widely adopted embedded-core architecture that balances performance, deterministic interrupt handling, and low power consumption for cost-sensitive industrial designs.
Key features of the ATSAM3N1CB-AU include the high-performance 32-bit Cortex-M3 core at 48 MHz, 64KB (64K x 8) of embedded flash for program storage, operation from 1.8V, 2.5V, or 3.3V supply rails, and the high pin-count 100-LQFP package that exposes generous GPIO and peripheral routing for complex boards. The device belongs to the SAM3N series, which Microchip (via the Atmel acquisition) positions as a general-purpose, cost-effective flash MCU line.
Technically, the part leverages the ARM Cortex-M3 RISC processor with thumb-2 instruction set efficiency, nested vectored interrupt control, and standard Atmel/Microchip SAM peripheral infrastructure. The 100-pin LQFP (14x14) footprint is a mature, industry-standard surface-mount package compatible with conventional reflow assembly processes.
Typical applications include industrial automation nodes, consumer appliance control boards, motor-adjacent control logic, and embedded sensing/communication modules where a 32-bit core with 64KB flash is sufficient and USB or Ethernet are not required.
A key design consideration is supply-rail selection: because the device supports 1.8V, 2.5V, and 3.3V operation, engineers should validate I/O voltage level compatibility with connected peripherals early in the design. Adequate decoupling capacitors on all supply pins of the 100-pin package are essential.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet alone.
直接替换替代料： ATSAM3N1CB-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： ATSAM3N1CB-AU （相同外形与封装尺寸） ——差异在于 Core Processor, Package, Program Memory Size, Instruction Set, Operating Temperature.
快速对比工具——选择替代料号进行并排对比：
ATSAM3N1CA-AU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
联系询价
查看数据手册 →ATSAM3N1CB-AUR
✅ 直接替换✓ 有现货
$2.7 / 个
查看数据手册 →ATSAM3N0CB-AU
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATSAM3N0CA-AU
✅ 直接替换✓ 有现货
$3.6 / 个
查看数据手册 →ATSAM3N2CB-AU
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATSAM3N4CB-AU
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATSAM3N1CB-AU 最大额定值与电气特性
| Core Processor | ARM Cortex-M3 |
| Core Size | 32-Bit |
| 最大时钟频率 | 48 MHz |
| Program Memory Type | FLASH |
| Program Memory Size | 64KB (64K x 8) |
| Series | SAM3N |
| 电源电压 | 1.8V / 2.5V / 3.3V |
| 封装 | 100-LQFP (14x14 mm) |
| 安装类型 | Surface Mount |
| Instruction Set | RISC |
| RoHS 状态 | Compliant |
| Packaging | Tray |
ATSAM3N1CB-AU 100-lqfp (14x14 mm) 引脚配置指南
ATSAM3N1CB-AU（100-lqfp (14x14 mm) 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： ATSAM3N1CB-AU.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATSAM3N1CB-AU 适用于 6 应用s: Industrial Automation Control Nodes, Consumer Appliance Control Boards, Embedded Sensing and Data Logging Modules, Motor Control and Drive Interface Logic, Building Automation and Security Panels, Portable and Battery-Powered Instruments.
Industrial Automation Control Nodes
The ATSAM3N1CB-AU fits industrial automation nodes where a 48 MHz Cortex-M3 core and 64KB flash are sufficient for control loops, Modbus-style UART communication, and digital I/O sequencing. Its 100-pin LQFP (14x14 mm) exposes ample GPIO for driving relays, reading limit switches, and interfacing multiple SPI/I2C sensors on one board. Operation from a 3.3V rail matches standard industrial logic levels, and the flash memory accommodates protocol stacks and bootloader code with headroom. Compared with an 8-bit MCU, the 32-bit core handles nested interrupts deterministically, improving scan-time consistency in PLC-adjacent subsystems and factory sensor aggregation modules.
推荐
Consumer Appliance Control Boards
Consumer appliance controllers - washing machines, rice cookers, air-conditioner indoor units - need a cost-optimized MCU with enough GPIO for keypads, displays, and motor drive signaling. The ATSAM3N1CB-AU provides this with a 48 MHz Cortex-M3 core, 64KB flash for control firmware and fault logging, and a 100-pin LQFP footprint that routes dozens of I/O lines without pin-multiplexing compromises. Its 1.8V/2.5V/3.3V supply flexibility allows direct interfacing with low-voltage display drivers. The flash architecture supports in-field firmware updates via a UART bootloader, reducing service costs. LCSC lists the part in stock at roughly $0.18 at volume as of 2026-09-19, meeting aggressive BOM cost targets.
推荐
Embedded Sensing and Data Logging Modules
Sensor aggregation and data-logging modules benefit from the ATSAM3N1CB-AU's combination of 64KB flash, a 48 MHz 32-bit core, and multiple serial interfaces routed on the 100-pin LQFP. SPI and I2C links connect ADCs, temperature, pressure, and humidity sensors, while a UART uploads data to a gateway. The Cortex-M3's nested vectored interrupt controller timestamps sensor events deterministically, important for event-sequence reconstruction in monitoring systems. The 3.3V operating rail matches most MEMS sensors directly, eliminating level-shift components. Firmware fits comfortably in 64KB, leaving space for wear-leveled flash logging routines and communications error handling.
推荐
Motor Control and Drive Interface Logic
In motor-driven products, the ATSAM3N1CB-AU serves as command and sequencing logic that feeds PWM signals to driver stages and reads encoder or hall-sensor feedback. The 48 MHz Cortex-M3 core executes timing-critical commutation sequences with predictable interrupt latency, and the 100-LQFP pin count lets designers dedicate ports to a full 3-phase PWM set plus fault and brake lines without heavy pin multiplexing. The 64KB flash holds FOC-lite or block-commutation algorithms plus a communication link to a supervisory controller. Supply operation at 3.3V matches gate-driver input thresholds; designers should add robust decoupling near the MCU to reject driver-stage switching noise.
推荐
Building Automation and Security Panels
Access-control panels, alarm keypads, and room controllers require an MCU with generous GPIO, serial interfaces for door hardware and network modules, and non-volatile program storage - all delivered by the ATSAM3N1CB-AU in its 100-pin LQFP (14x14 mm) package. The 48 MHz Cortex-M3 handles keypad scanning, LCD driving, buzzer timing, and RS-485 framing concurrently under interrupt control. The 64KB flash supports cryptographic-style challenge-response routines for simple credential checking, and the 3.3V rail integrates with standard building-automation logic. Its RoHS-compliant construction meets commercial-building procurement requirements, and distributor stocking (DigiKey, LCSC) supports both prototype and volume production runs.
推荐
Portable and Battery-Powered Instruments
Handheld meters, testers, and portable instruments leverage the ATSAM3N1CB-AU's 1.8V/2.5V/3.3V supply options, which permit operation directly from two-cell or single-cell-boosted battery rails. The 48 MHz Cortex-M3 core provides enough throughput for digital filtering of ADC streams, and the 64KB flash stores calibration tables plus UI firmware. The 100-pin LQFP supports a segment LCD interface, matrix keypad, USB-adjacent serial links via bridges, and multiple analog front-end control lines. Designers should exploit the MCU's low-power idle modes between measurements; the deterministic wake-up of the Cortex-M3 nested vectored interrupt controller makes sample scheduling straightforward without an external real-time kernel.
推荐
推荐产品汇总
工程参考数据： ATSAM3N1CB-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 | ATSAM3N1CA-AU | ATSAM3N0CB-AU | ATSAM3N0CA-AU | ATSAM3N2CB-AU | ATSAM3N4CB-AU |
|---|---|---|---|---|---|---|
| Package | 100-LQFP (14x14 mm) | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same |
| Brand | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) |
| Core / Clock | ARM Cortex-M3, 48 MHz | ARM Cortex-M3, 48 MHz | ARM Cortex-M3, 48 MHz | ARM Cortex-M3, 48 MHz | ARM Cortex-M3, 48 MHz | ARM Cortex-M3, 48 MHz |
| Flash Memory | 64KB (64K x 8) | 64KB | 32KB | 32KB | 128KB | 256KB |
| Supply Voltage | 1.8V / 2.5V / 3.3V | 1.8V / 2.5V / 3.3V | 1.8V / 2.5V / 3.3V | 1.8V / 2.5V / 3.3V | 1.8V / 2.5V / 3.3V | 1.8V / 2.5V / 3.3V |
| Packaging | Tray | Tray | Tray | Tray | Tray | Tray |
| Lifecycle Status | Active | Active | Active | Active | Active | Active |
关键差异点
- Doubled flash versus the ATSAM3N0 tier （对比 ATSAM3N0CB-AU)
- Same package, zero-rework upward migration （对比 ATSAM3N2CB-AU)
- Cost position versus top-of-family （对比 ATSAM3N4CB-AU)
设计说明
Decouple every supply pin pair of the 100-LQFP package with a 100 nF ceramic capacitor placed within 2-3 mm of each pin, plus one bulk 4.7-10 uF capacitor near the part. Because the device accepts 1.8V, 2.5V, or 3.3V rails, ensure the selected rail stays within the datasheet tolerance under all load transients, and confirm I/O level compatibility with connected peripherals at the chosen voltage. Estimated: at 48 MHz with light I/O loading, core current is typically in the tens of milliamps range per SAM3N family behavior - verify against the manufacturer datasheet electrical characteristics table for your exact voltage and clock configuration.
Keep the SWD (serial wire debug) pads accessible on production boards - the Cortex-M3 SWDIO/SWCLK pair is the primary debug and recovery interface, and burying it under a connector or component makes rework after a failed flash operation very difficult. Route the SWD traces short and away from high dv/dt nets such as motor driver gate lines. Provide a programming header or tag-connect footprint compatible with SAM-BA UART recovery as a second-path fallback for field service.
A frequent mistake when migrating within the SAM3N family is assuming identical peripheral sets across ATSAM3N0/3N1/3N2/3N4 variants. While all share the 100-LQFP footprint and Cortex-M3 core, peripheral instances and pin-multiplex options differ. Before swapping a 3N0CB for the 64KB ATSAM3N1CB-AU (or vice versa), regenerate pin-mux configuration from the Microchip device header files and re-verify every alternate-function assignment. Also confirm the exact '-AU' temperature/speed grade suffix matches your environment, and review Microchip PCN notifications for lifecycle updates since this is a legacy Atmel-origin product line.
合规信息
RoHS compliance indicated by the green ('Grn') marking in the Utmel listing for SAM3N LQFP parts. Other compliance statuses not stated in provided data.