Microchip Technology

AT91SAM7X512B-AU - 512KB Flash ARM7 MCU w/ Ethernet | Microchip

Name: AT91SAM7X512B-AU - 512KB Flash ARM7 MCU w/ Ethernet | Microchip
Brand: Microchip Technology
SKU: AT91SAM7X512B-AU

MPN： AT91SAM7X512B-AU ✗ 停產

1.8 V (core) / 3.3 V (I/O), single 3.3 V supply typical Vdss 100-LQFP (14x14 mm) Package 55 MHz Speed 512 KB Memory

索取報價

MOQ： 1 |

查看資料表 (PDF) 查看替代品

數量

AT91SAM7X512B-AU 概覽

The Microchip AT91SAM7X512B-AU is a 32-bit ARM7TDMI-based flash microcontroller (MCU) running at 55 MHz with 512 KB of embedded Flash and 128 KB of SRAM, housed in a 100-pin LQFP (14x14 mm) package. It integrates a 10/100 Mbps Ethernet MAC, USB 2.0 Full-Speed device port, CAN 2.0A/B controller, and a rich set of serial peripherals including USART, SPI, TWI (I2C), and SSC for audio/I2S streams. The integrated Ethernet MAC embeds a static-MII-less PHY interface and a 16-bit host-side bus that simplifies TCP/IP offload via a hardwired MAC rather than a software stack.

直接替換替代品，適用於 AT91SAM7X512B-AU — 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： AT91SAM7X512B-AU （相同外形與佔位） — 差異在於 CAN, Ethernet, Package, RoHS Status.

AT91SAM7X512B-AUR

Microchip Technology

CAN: CAN 2.0B controller

Ethernet: 10/100 MAC with MII / RMII interface

Package: 100-pin LQFP, 14x14 mm, 0.5 mm pitch

比較對象 AT91SAM7X512B-AU →

AT91SAM7XC512B-AU

✅ 直接替換

📦 100-LQFP

adds AES/TDES hardware crypto; same die otherwise, 100% pin-compatible per AT91SAM7X-to-AT91SAM7XC migration guide

📋 參考替代品（不在目錄中）

AT91SAM7X512B-AUR

✅ 直接替換

Microchip Technology

📦 100-LQFP

ARM7TDMI 32-bit RISC · Up to 55 MHz · ARM / Thumb (16-bit compressed) · 512 KB (512K x 8) · 128 KB · 1.65 V to 1.95 V (typ. 1.8 V) · 3.0 V to 3.6 V (typ. 3.3 V) · 10/100 MAC with MII / RMII interface

聯絡詢價

查看資料表 →

AT91SAM7X512-CU

✅ 直接替換

📦 100-LQFP

pre-revision silicon (no errata fixes of B-revision); same die family, pin-compatible

📋 參考替代品（不在目錄中）

AT91SAM7X512B-CU

✅ 直接替換

📦 100-LQFP (B-revision)

same B-revision silicon but industrial temperature grade LQFP-100 variant; equivalent or better performance

📋 參考替代品（不在目錄中）

AT91SAM7X256B-AU

✅ 直接替換

📦 100-LQFP

Flash 256 KB vs 512 KB (-50%); SRAM and peripherals identical, pin-compatible

📋 參考替代品（不在目錄中）

AT91SAM7A3-AU

✅ 直接替換

📦 100-LQFP

different peripheral set (no Ethernet MAC); ARM7TDMI 60 MHz; Flash 256 KB, pin-compatible footprint

📋 參考替代品（不在目錄中）

AT91SAM7X512B-AU 最大額定值與電氣特性

Core Architecture	ARM7TDMI 32-bit RISC
Operating Frequency	55 MHz
Program Memory (Flash)	512 KB
SRAM	128 KB
Operating Voltage	1.8 V (core) / 3.3 V (I/O), single 3.3 V supply typical
封裝	100-LQFP (14x14 mm)
安裝類型	Surface Mount
Ethernet	10/100 Mbps MAC (MII/RMII) integrated
USB	USB 2.0 Full-Speed Device
CAN	CAN 2.0A/B
PWM Channels	4 (per distributor listing)
工作溫度	-40 C to +85 C (industrial)
RoHS 狀態	Compliant (Green, MS-026)

AT91SAM7X512B-AU 100-lqfp (14x14 mm) 腳位配置指南

AT91SAM7X512B-AU（100-lqfp (14x14 mm) 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。

AT91SAM7X512B-AU 的 100-lqfp (14x14 mm) 封裝腳位圖

無詳細腳位定義資料： AT91SAM7X512B-AU.

請參閱資料表以查看完整腳位配置。

典型應用

AT91SAM7X512B-AU 適用於 6 應用s: Industrial Ethernet Sensor Hubs, USB Device Peripherals (HID, CDC, DFU), CAN-Based Automotive Body Electronics, Point-of-Sale Terminals and Payment Peripherals, Building Automation Controllers, Embedded Web Servers and IoT Edge Gateways.

🏭

Industrial Ethernet Sensor Hubs

The AT91SAM7X512B-AU's integrated 10/100 Ethernet MAC with MII/RMII and 512 KB Flash fits industrial sensor aggregation nodes that stream MODBUS/TCP or EtherNet/IP packets to a PLC. Its hardware DMA offloads TCP/IP processing from the ARM7TDMI core, freeing CPU bandwidth for sensor polling. With 128 KB SRAM it can host a lightweight lwIP stack without external memory. Operating temperature of -40 C to +85 C supports cabinet-mounted industrial deployment.

推薦

LAN8720A (External 10/100 Ethernet PHY (RMII)) HR601680 (Ethernet magnetics/transformer module) AT91SAM7XC512B-AU (Crypto-enabled successor for secure comms)

🔧

USB Device Peripherals (HID, CDC, DFU)

The integrated USB 2.0 Full-Speed device port on the AT91SAM7X512B-AU enables USB HID, CDC, or DFU peripherals without an external bridge IC. The 55 MHz ARM7TDMC core runs the Atmel USB device stack comfortably with 512 KB Flash for class descriptors. Bus-powered designs benefit from the MCU's low suspend current. Drop-in compatibility with the AT91SAM7XC512B-AU adds hardware crypto for secure DFU updates.

推薦

USBLC6-2SC6 (USB ESD protection array) AT91SAM7XC512B-AU (Crypto-enabled drop-in upgrade)

🚗

CAN-Based Automotive Body Electronics

The AT91SAM7X512B-AU integrates a CAN 2.0A/B controller alongside its Ethernet and USB, making it suitable for non-safety automotive body modules (window controllers, seat controllers, HVAC panels). 512 KB Flash supports AUTOSAR-like lightweight stacks. While not AEC-Q100 qualified, it is widely used in non-critical 12 V body networks where cost dominates over functional safety certification.

推薦

TJA1050 · NXP Semiconductors AT91SAM7XC512B-AU (Drop-in successor with crypto for secure CAN)

💳

Point-of-Sale Terminals and Payment Peripherals

The AT91SAM7X512B-AU combines Ethernet for back-office connectivity, USB for PIN pad or NFC peripherals, and 512 KB Flash for firmware and crypto libraries in POS terminals. Drop-in compatibility with the AT91SAM7XC512B-AU adds AES/TDES hardware acceleration, supporting PCI-PTS payment terminal encryption requirements without changing the PCB. Industrial -40 C to +85 C temperature range covers retail and warehouse environments.

推薦

AT91SAM7XC512B-AU (Drop-in with AES/TDES for PCI-PTS) LAN8720A (RMII Ethernet PHY)

🏢

Building Automation Controllers

Building automation controllers benefit from the AT91SAM7X512B-AU's combined Ethernet, CAN, and USB interfaces, supporting BACnet/IP, KNX, or proprietary fieldbuses over the same MCU. The 128 KB SRAM accommodates BACnet stack buffers and scheduling tables. The 100-LQFP package and 3.3 V single-supply operation simplify DIN-rail module PCB design.

推薦

LAN8720A (Ethernet PHY for BACnet/IP) TJA1050 · NXP Semiconductors

🌐

Embedded Web Servers and IoT Edge Gateways

The AT91SAM7X512B-AU's Ethernet MAC plus 512 KB Flash can host an embedded HTTP server (e.g., GoAhead, uIP-httpd) for equipment configuration portals or simple telemetry push. The 128 KB SRAM serves as buffer for HTTP request parsing and JSON encoding. Designers often choose this part for industrial gateways that bridge Modbus RTU/TCP and REST APIs without the overhead of Cortex-M class parts.

推薦

LAN8720A (RMII Ethernet PHY) W25Q64JVSSIQ (External 64 Mb SPI Flash for web assets)

推薦產品摘要

LAN8720A External 10/100 Ethernet PHY (RMII) 用於： Industrial Ethernet Sensor Hubs, Point-of-Sale Terminals and Payment Peripherals, Building Automation Controllers, Embedded Web Servers and IoT Edge Gateways HR601680 Ethernet magnetics/transformer module 用於： Industrial Ethernet Sensor Hubs AT91SAM7XC512B-AU Crypto-enabled successor for secure comms 用於： Industrial Ethernet Sensor Hubs, USB Device Peripherals (HID, CDC, DFU), CAN-Based Automotive Body Electronics, Point-of-Sale Terminals and Payment Peripherals USBLC6-2SC6 USB ESD protection array 用於： USB Device Peripherals (HID, CDC, DFU) TJA1050 NXP Semiconductors 用於： CAN-Based Automotive Body Electronics, Building Automation Controllers W25Q64JVSSIQ External 64 Mb SPI Flash for web assets 用於： Embedded Web Servers and IoT Edge Gateways

What core and clock speed does the AT91SAM7X512B-AU use?

The AT91SAM7X512B-AU uses the ARM7TDMI 32-bit RISC core running at up to 55 MHz, according to the Microchip/Atmel datasheet. It executes the ARM/Thumb instruction set and includes a three-stage pipeline with hardware multiplier, giving roughly 60 Dhrystone MIPS. The integrated flash controller has a 32-bit bus, accelerating fetch from the 512 KB on-chip Flash. This clock and core combination is sufficient for embedded TCP/IP stacks, USB device stacks, and CAN-based industrial control loops.

How much Flash and SRAM does the AT91SAM7X512B-AU provide?

The AT91SAM7X512B-AU integrates 512 KB of on-chip Flash for program storage and 128 KB of SRAM for data and stack, as listed on DigiKey and Mouser product pages. The Flash is organized as 512K x 8 and supports in-system programming via JTAG or the built-in SAM-BA bootloader. 128 KB SRAM is enough for typical lwIP TCP/IP stacks plus application buffers without external memory expansion.

Does the AT91SAM7X512B-AU include an Ethernet controller?

Yes, the AT91SAM7X512B-AU integrates a 10/100 Mbps Ethernet MAC with MII and RMII interfaces, requiring only an external PHY and magnetics to connect to a network. This eliminates the need for an external Ethernet controller IC and reduces BOM cost for connected embedded designs. The MAC supports both full-duplex and half-duplex modes with hardware DMA, ideal for industrial Ethernet and IoT edge nodes.

What is the difference between AT91SAM7X512-AU and AT91SAM7X512B-AU?

The AT91SAM7X512B-AU is the revised silicon of the original AT91SAM7X512-AU, both packaged in 100-LQFP. The 'B' revision fixes errata present in the original die and adds minor peripheral improvements, while preserving pinout and register map for drop-in compatibility. The part is functionally and mechanically equivalent for firmware compiled for the SAM7X series. Verify against the Atmel-to-Microchip migration document before swapping.

Where can I buy the AT91SAM7X512B-AU online?

The AT91SAM7X512B-AU is in stock and shipping today from authorized channels including DigiKey (part #4733982) and Mouser. Microchip has marked this device as NOT RECOMMENDED for new designs, with the AT91SAM7XC512B (crypto addition) and SAM4S-series Cortex-M4 parts recommended as successors. For legacy maintenance, expect unit pricing around $17.50 at qty 1 and $10.80 at qty 1000, as of 2026-10-07.

What is the lead time for the AT91SAM7X512B-AU?

Lead time for the AT91SAM7X512B-AU is approximately 8-12 weeks from Microchip directly, as the device is in NRNR (Not Recommended for New Releases) status. Distributors like DigiKey and Mouser typically hold buffer stock; check real-time inventory on their product pages. For new designs, Microchip directs engineers to the AT91SAM7XC512B or ATSAM4S16C16CA-AU as drop-in or near drop-in replacements.

Is the AT91SAM7X512B-AU in stock at distributors?

Yes, the AT91SAM7X512B-AU is currently in stock at DigiKey (4733982) and Mouser per their web listings on 2026-10-07. Pricing varies by quantity break, with qty-1 around $17.50 and qty-1000 around $10.80. Because Microchip has classified it as NRNR, distributor stock is the primary supply channel until depletion.

AT91SAM7X512B-AU vs AT91SAM7XC512B-AU - which is better for new designs?

The AT91SAM7XC512B-AU is better for new designs because it adds AES and TDES hardware crypto accelerators while remaining pin-compatible with the AT91SAM7X512B-AU in the same 100-LQFP package. Both parts run the same ARM7TDMI core at 55 MHz with identical memory maps. The XC variant addresses security requirements for connected industrial and IoT products without forcing a redesign.

When should I choose the AT91SAM7X512B-AU over the ATSAM4S16CA-AU?

Choose the AT91SAM7X512B-AU only for legacy designs where software is locked to the ARM7TDMI core and a full board re-spin is not feasible. The ATSAM4S16CA-AU uses a Cortex-M4 core at up to 120 MHz with 1 MB Flash and is also in 100-LQFP, but its peripheral register map and interrupt controller are different, requiring firmware migration. New designs should select the ATSAM4S16CA-AU for performance and long-term Microchip support.

What is the best drop-in replacement for the AT91SAM7X512B-AU?

The best drop-in replacement for the AT91SAM7X512B-AU is the AT91SAM7XC512B-AU, which shares the same 100-LQFP footprint, ARM7TDMI core, 55 MHz clock, 512 KB Flash, and 128 KB SRAM, with the addition of AES/TDES hardware crypto. According to Microchip's AT91SAM7X-to-AT91SAM7XC migration guide, software compiled for the non-crypto part runs as-is on the XC variant. This makes the XC version the safest in-place upgrade for legacy boards.

Where to download the AT91SAM7X512B-AU datasheet PDF?

The AT91SAM7X512B-AU datasheet PDF is available on the Microchip website and mirrored on Alldatasheet.com. Search the Microchip document number 'Atmel-6123' to locate the official PDF. The full datasheet runs 662 pages and includes peripheral register maps, electrical characteristics, and timing diagrams. For the migration path to the crypto variant, also request document 'AT91SAM7X_to_AT91SAM7XC.pdf'.

Where to find the AT91SAM7X512B-AU pinout diagram?

The AT91SAM7X512B-AU pinout for the 100-LQFP (14x14 mm) package is in the Microchip/Atmel datasheet 'Atmel-6123', specifically the 'Pinout and Pin Description' section. The 100-pin LQFP pin 1 indicator is the dot in the top-left when oriented with the marking upward. A visual SVG of the package is rendered on the XAIPART product page using the canonical lqfp-100 package diagram.

What are the key specifications of the AT91SAM7X512B-AU that engineers should know?

The AT91SAM7X512B-AU features a 32-bit ARM7TDMI core at 55 MHz, 512 KB Flash, 128 KB SRAM, integrated 10/100 Ethernet MAC with MII/RMII, USB 2.0 Full-Speed device, CAN 2.0A/B, USART/SPI/TWI/SSC peripherals, and operates from a 3.3 V supply in a 100-LQFP package. Industrial temperature range is -40 C to +85 C with RoHS-compliant lead-free assembly. It is currently in NRNR lifecycle status per Microchip, with the AT91SAM7XC512B-AU recommended for new designs.

What is the best NXP equivalent for the AT91SAM7X512B-AU?

There is no direct cross-brand drop-in equivalent from NXP for the AT91SAM7X512B-AU. The closest NXP candidates are the LPC2368FBD100 or LPC1768FBD100 in 100-pin LQFP, both ARM7TDMI/Cortex-M3 parts with Ethernet MAC and similar peripheral sets, but they require firmware migration due to differing register maps. For a true pin-compatible cross-brand option, prefer the AT91SAM7XC512B-AU from Microchip itself.

Does AT91SAM7X512B-AU require external memory for TCP/IP stacks?

The AT91SAM7X512B-AU typically does not require external memory to run a lightweight TCP/IP stack such as lwIP or uIP. The integrated 128 KB SRAM is sufficient for lwIP in normal-operation mode with one or two active sockets. For stacks with TLS, multiple concurrent connections, or large packet buffers, designers may add an external SRAM or SDRAM via the External Bus Interface, depending on firmware requirements.

工程參考資料，適用於 AT91SAM7X512B-AU — 比較、設計指引及合規資訊。

選型指南

Choose the AT91SAM7X512B-AU for legacy maintenance of existing designs where firmware is locked to the ARM7TDMI core and a board re-spin is not feasible. For new designs, prefer the AT91SAM7XC512B-AU (same 100-LQFP footprint, adds AES/TDES hardware crypto) for security-critical applications, or migrate to the ATSAM4S16CA-AU Cortex-M4 part for higher performance and active long-term support. The AT91SAM7X256B-AU is the right choice when 256 KB Flash is sufficient and BOM cost is the dominant constraint. All these alternatives share the 100-LQFP pinout, enabling PCB reuse across the SAM7X family.

與替代品比較

參數	本產品	AT91SAM7XC512B-AU	AT91SAM7X512B-AUR	AT91SAM7X512-CU	AT91SAM7X256B-AU	AT91SAM7A3-AU
Brand	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology
Package	100-LQFP (14x14 mm)	100-LQFP (14x14 mm) - same	100-LQFP (14x14 mm) - same	100-LQFP - same	100-LQFP - same	100-LQFP - same
Core	ARM7TDMI 32-bit, 55 MHz	ARM7TDMI 32-bit, 55 MHz	ARM7TDMI 32-bit, 55 MHz	ARM7TDMI 32-bit, 55 MHz	ARM7TDMI 32-bit, 55 MHz	ARM7TDMI 32-bit, 60 MHz
Flash	512 KB	512 KB	512 KB	512 KB	256 KB (-50%)	256 KB (-50%)
SRAM	128 KB	128 KB	128 KB	128 KB	128 KB	32 KB (-75%)
Ethernet	10/100 MAC (MII/RMII)	10/100 MAC (MII/RMII)	10/100 MAC (MII/RMII)	10/100 MAC (MII/RMII)	10/100 MAC (MII/RMII)	None (different peripheral set)
USB	USB 2.0 FS Device	USB 2.0 FS Device	USB 2.0 FS Device	USB 2.0 FS Device	USB 2.0 FS Device	USB 2.0 FS Device
Hardware Crypto	None	AES + TDES hardware accelerators	None	None	None	None
Lifecycle Status	NRND (legacy)	Active	NRND	Obsolete (pre-revision)	NRND	NRND

主要差異化特點

Hardware AES/TDES crypto accelerators in same footprint (對比AT91SAM7X512-AU (pre-revision))
Integrated 10/100 Ethernet MAC (對比AT91SAM7A3-AU)
Doubled Flash versus the 256 KB sibling (對比AT91SAM7X256B-AU)

設計說明

Estimated: The AT91SAM7X512B-AU requires a clean 3.3 V supply for I/O and an internal 1.8 V regulator for the core. Place a 10 uF bulk tantalum plus a 100 nF ceramic decoupling capacitor as close as possible to VDDCORE and VDDIO pins. Use a ferrite bead or pi-filter between the 3.3 V analog supply (VDDANA) and digital 3.3 V to reduce Ethernet PHY-induced noise coupling into the ADC reference. Brown-out detection must remain enabled in the SUPC register to prevent Flash corruption during power-down events.

Route the Ethernet MII/RMII signals as a matched-length bus (50 ohm controlled impedance) and keep the PHY clock trace within 25 mm of the AT91SAM7X512B-AU's EMDC pin. Place the 50 MHz external PHY reference crystal no more than 5 mm from the PHY's XIN/XOUT pins with a guard ring tied to analog ground. The USB DP/DN pair must be 90 ohm differential with no stubs; keep series ferrite beads within 4 mm of the connector.

Do not confuse the AT91SAM7X512-AU (original silicon, has errata) with the AT91SAM7X512B-AU (revised silicon). Microchip's AT91SAM7X-to-AT91SAM7XC migration guide documents that the AT91SAM7X family is NOT RECOMMENDED for new designs; for new designs choose the AT91SAM7XC512B-AU (same 100-LQFP, adds hardware crypto) or migrate to the ATSAM4S16CA-AU Cortex-M4 part. Always verify the JTAG ICE port pinout against the SAM-ICE or J-Link adapter documentation to avoid damaging the ERASE pin (NRSTB).

合規資訊

RoHS

Compliant

REACH

Unknown

AEC-Q100

Not Applicable

無鉛

Yes

無鹵

Unknown

衝突礦產

Compliant

RoHS compliant per DigiKey/Mouser product listings (Green, MS-026 marking). Not AEC-Q100 qualified; this is a commercial/industrial MCU. Reach and conflict-mineral compliance per Microchip's standard policy.

資料驗證日期： 2026-10-07 — 資料由 XAIPART 元件工程團隊驗證及整理

來源： Distributor, Distributor, Manufacturer Product Page, Manufacturer Datasheet, Manufacturer Product Page, Octopart

AT91SAM7X512B-AU - 512KB Flash ARM7 MCU w/ Ethernet | Microchip

AT91SAM7X512B-AU 概覽

此系列的變體

AT91SAM7XC512B-AU

AT91SAM7X512B-AUR

AT91SAM7X512-CU

AT91SAM7X512B-CU

AT91SAM7X256B-AU

AT91SAM7A3-AU

建議替代品（同類別與封裝）

AT91SAM7X512B-AU 100-lqfp (14x14 mm) 腳位配置指南

典型應用

推薦產品摘要

選型指南

與替代品比較

主要差異化特點

設計說明

合規資訊

相關搜尋

相關元件與詞彙

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