ATSAM4S4CB-AN - 120MHz Cortex-M4, 256KB Flash MCU | Microchip
MPN： ATSAM4S4CB-AN ✓ 啟用中ATSAM4S4CB-AN 概覽
A microcontroller (MCU) is a single integrated circuit that combines a processor core, memory, and peripherals into one chip, forming the lowest level of the embedded-computing hierarchy: microcontroller -> embedded processor -> system-on-chip -> computing system. The SAM4S family is Microchip (formerly Atmel) ARM Cortex-M4-based flash MCU line, positioned for cost-sensitive designs that still need DSP-class math capability from the core's single-cycle MAC and hardware FPU-free thumb-2 instruction set.
Key features include the 120 MHz maximum clock frequency, 256 KB (256K x 8) of on-chip flash program memory, 64 kB of data SRAM, 79 general-purpose I/O lines, and a 12-bit ADC. The wide 1.2V/3.3V operating supply support and LQFP GREEN, MRL B packaging simplify both design and assembly.
Technically, the SAM4S implements an ARM Cortex-M4 RISC core with a 3-stage pipeline and Harvard architecture, plus a multi-layer bus matrix that lets flash execution and peripheral DMA operate concurrently. The 12-bit ADC, multiple USART/SPI/TWI serial channels, PWM timers, and USB device connectivity cover most industrial interface needs without external components.
Typical applications include industrial automation and factory control nodes, consumer appliance controllers, and measurement or data-logging instruments where 256 KB flash and 79 I/O lines give adequate headroom for RTOS-based firmware.
Design consideration: supply the core from the integrated regulator (1.2V) and I/O from 3.3V, and decouple both rails close to the package to guarantee 120 MHz operation across the full industrial temperature range.
This page synthesizes distributor pricing, drop-in alternatives, pinout resources, and practical design notes not found in the manufacturer datasheet. Pricing is as of 2026-09-20.
直接替換替代品，適用於 ATSAM4S4CB-AN — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ATSAM4S4CB-AN （相同外形與佔位） — 差異在於 Package, RoHS Status, Peripherals, SRAM, ADC.
ATSAM4S4CA-CU
✅ 直接替換聯絡詢價
查看資料表 →ATSAM4S16CA-AN
✅ 直接替換聯絡詢價
查看資料表 →ATSAM4S16CA-CU
✅ 直接替換聯絡詢價
查看資料表 →ATSAM4S4CB-CU
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ATSAM4S8CB-AN
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATSAM4S4CB-AN 最大額定值與電氣特性
| Core | ARM Cortex-M4 |
| Core Size | 32-bit |
| 最大時脈頻率 | 120 MHz |
| Flash Memory Size | 256 KB (256K x 8) |
| Data RAM Size | 64 kB |
| ADC Resolution | 12 bit |
| Number of I/Os | 79 I/O |
| 工作電源電壓 | 1.2 V / 3.3 V |
| 資料匯流排寬度 | 32 bit |
| Minimum Operating Temperature | -40 C |
| Maximum Operating Temperature | +105 C |
| Temperature Grade | Industrial |
| 封裝 / 外殼 | 100-LQFP (14x14 mm) |
| Package Code | LFQFP, square, gull-wing terminals |
| 安裝方式 | SMD/SMT |
| Packaging | Tray |
| RoHS 狀態 | Compliant (GREEN, MRL B) |
| Program Memory Type | FLASH |
ATSAM4S4CB-AN lfqfp, square, gull-wing terminals 腳位配置指南
ATSAM4S4CB-AN（lfqfp, square, gull-wing terminals 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： ATSAM4S4CB-AN.
請參閱 資料表 以查看完整腳位配置。
典型應用
ATSAM4S4CB-AN 適用於 6 應用s: Industrial Automation and PLC Nodes, Motor Control and Actuator Drives, Measurement and Data-Logging Instruments, Consumer Appliance Controllers, Embedded Networking and Communication Gateways, Battery-Powered Portable Devices.
Industrial Automation and PLC Nodes
The ATSAM4S4CB-AN fits industrial control nodes because its 120 MHz Cortex-M4 core executes control loops and communication stacks with margin, while 79 I/O lines interface directly to relays, sensors, and HMI signals. Its -40C to +105C industrial rating survives cabinet environments where consumer parts fail. In a typical node, the MCU polls a 12-bit ADC for analog process variables, drives PWM outputs for actuators, and exchanges data over USART/RS-485 or TWI field links. The 256 KB flash holds an RTOS plus protocol stacks, and 64 kB SRAM buffers DMA transfers without external memory. The 100-pin LQFP supports standard AOI inspection on industrial assembly lines.
推薦
Motor Control and Actuator Drives
Motor and actuator control benefits from the ATSAM4S4CB-AN combination of a 120 MHz Cortex-M4 core with single-cycle MAC for control-law computation, hardware PWM channels for inverter gate drive, and the 12-bit ADC for current and position feedback sampling. The 64 kB SRAM accommodates field-oriented-control state variables and DMA ring buffers without external RAM. Running from a 3.3V I/O supply with 1.2V core regulation keeps the power tree simple inside drive enclosures, and the industrial -40C to +105C temperature rating matches motor-adjacent thermal conditions. Firmware for sensorless or encoder-based commutation fits comfortably in the 256 KB flash along with a communication stack.
推薦
Measurement and Data-Logging Instruments
Bench and field instruments use the ATSAM4S4CB-AN because its 12-bit ADC digitizes sensor channels, the 120 MHz core applies filtering and calibration math, and USB or USART links transfer logged data to hosts. The 256 KB flash stores waveform tables, calibration constants, and a menu-driven UI framework, while 64 kB SRAM provides sample buffers sized for burst capture via DMA. Operation from -40C to +105C allows instruments used on production floors or outdoors, and the LQFP-100 with 79 I/O drives keypads, segment LCD backplanes through GPIO, and status indicators. Low external component count shortens the analog front-end to MCU signal path, improving noise performance.
推薦
Consumer Appliance Controllers
Appliance main boards adopt the ATSAM4S4CB-AN for its balance of cost and capability: the 120 MHz Cortex-M4 handles user-interface rendering, touch/sensor inputs across 79 I/O lines, and PWM control of motors, heaters, or fans from a single chip. The 256 KB flash fits localized UI assets and OTA-capable bootloaders, and 64 kB SRAM supports display buffers and state machines. The GREEN, RoHS-compliant, MRL B LQFP packaging meets consumer assembly and environmental requirements, while the industrial temperature rating provides margin for enclosed, heat-generating appliances. TWI and USART peripherals connect to display drivers and external EEPROMs without glue logic.
推薦
Embedded Networking and Communication Gateways
The ATSAM4S4CB-AN serves small gateways and protocol converters by offering multiple USART, SPI, and TWI channels that bridge RS-485, CAN-adjacent serial links, and USB device connections concurrently through its multi-layer bus matrix and DMA. The 120 MHz core runs dual protocol stacks simultaneously, and 64 kB SRAM holds packet buffers deep enough for bursty industrial traffic. The 256 KB flash stores two firmware banks for fail-safe field updates, an important reliability pattern for unattended network nodes. With -40C to +105C operation, DIN-rail and outdoor enclosures are covered, and the 100-pin LQFP provides enough I/O for status LEDs, configuration DIP switches, and watchdog interfacing.
推薦
Battery-Powered Portable Devices
Portable and battery-operated products use the ATSAM4S4CB-AN where its low-power SAM4S architecture with sleep and wait modes extends battery life, while the 120 MHz active clock delivers responsive user interfaces when awake. The 12-bit ADC reads battery voltage and sensor inputs, PWM controls backlight and haptic outputs, and USB device connectivity supports charging and data sync over one connector. The 256 KB flash holds the UI, BLE-bridge or sensor logic, and bootloader, and 64 kB SRAM supports DMA-driven sample collection. The 3.3V I/O architecture matches common Li-ion regulated rails, and the compact yet inspectable LQFP-100 fits two-sided portable PCBs.
推薦
推薦產品摘要
工程參考資料，適用於 ATSAM4S4CB-AN — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ATSAM4S4CA-CU | ATSAM4S16CA-AN | ATSAM4S16CA-CU | ATSAM4S8CB-AN |
|---|---|---|---|---|---|
| Package | 100-LQFP (14x14 mm) | 100-pin, same family footprint variant | 100-LQFP (14x14 mm) - same | 100-pin, same family footprint variant | 100-LQFP (14x14 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Clock | ARM Cortex-M4, 120 MHz | Cortex-M4, 120 MHz | Cortex-M4, 120 MHz | Cortex-M4, 120 MHz | Cortex-M4, 120 MHz |
| Flash Memory | 256 KB | 256 KB | 1 MB | 1 MB | 512 KB |
| ADC Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| I/O Count | 79 | 79 (100-pin class) | 79 (100-pin class) | 79 (100-pin class) | 79 (100-pin class) |
| RoHS / Green | Compliant (GREEN, MRL B) | Compliant | Compliant | Compliant | Compliant |
主要差異化特點
- Cost-optimized 256 KB flash tier in a full 100-pin, 79-I/O package (對比ATSAM4S16CA-AN)
- Industrial -40C to +105C rating at standard cost tier (對比ATSAM4S16CA-AN)
- Cortex-M4 DSP capability vs smaller SAM family parts (對比PIC16F1829-I/PT)
設計說明
The SAM4S uses a dual-rail architecture: 3.3V on the VDDIO/VDDFLASH domain and an internally regulated 1.2V core. Place 100 nF ceramic decoupling capacitors at every VDDIO pin pair plus one 4.7-10 uF bulk capacitor per rail, positioned within 2-3 mm of the package. Estimated: 120 MHz operation from 3.3V draws tens of mA of core current, so IR drop across thin traces can cause brown-outs during flash writes - use a dedicated power plane or wide pours.
For the 100-LQFP 14x14 mm footprint, define the land pattern per the mechanical drawing in the SAM4S datasheet and connect each gull-wing pad to at least one thermal-relief via for rework access. Route the crystal (typical 12 MHz main oscillator) with guard ground and keep it under 10 mm from the OSC pins. Provide programming access via the 5-pin Cortex SWD/SAM-ICE JTAG header even if unused in production.
Three frequent mistakes with this part: (1) assuming 5V tolerance - all I/O is 3.3V domain; use level shifters for 5V buses. (2) Omitting the VDDCORE decoupling, which causes sporadic resets at 120 MHz and elevated temperature near +105C. (3) Ignoring MRL B moisture sensitivity - if trays sit unbaked beyond floor life, popcorning during reflow can crack the LQFP. Bake per JESD-type floor-life guidance printed on the label before reflow.
合規資訊
Mouser and OnlineComponents list the part as GREEN (halogen-free) and RoHS Compliant, moisture sensitivity MRL B. Reach and conflict-minerals declarations should be taken from the official Microchip material declaration report.
