ATSAME53J18A-AF - 120MHz Cortex-M4F MCU 256KB Flash 64-TQFP
MPN: ATSAME53J18A-AF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.2 | $7.20 |
| 10 | $6.4 | $64.00 |
| 100 | $5.6 | $560.00 |
| 500 | $5.05 | $2,525.00 |
| 1,000 | $4.5 | $4,500.00 |
ATSAME53J18A-AF Overview
What is a Cortex-M4F microcontroller? A Cortex-M4F microcontroller is a 32-bit MCU core built on the ARMv7-M architecture with hardware single-precision floating point, deterministic interrupt handling, and a Thumb-2 instruction set, positioning it in the hierarchy MCU -> embedded processor -> microcontroller -> semiconductor. The 'F' suffix denotes an integrated FPU, which accelerates floating-point DSP and control-loop math versus integer-only M-class cores.
Key features of the ATSAME53J18A-AF include a 10/100 Mbps Ethernet MAC with IEEE 1588 PTP timestamping, a USB 2.0 Full-Speed device/host interface, a high-speed SD/MMC host controller, two I2S interfaces for digital audio, up to six SERCOM configurable serial channels (UART/SPI/I2C), a 12-bit 1 Msps ADC, dual analog comparators, and a hardware Cryptographic Accelerator (AES/SHA/TRNG). The 64-TQFP package gives access to 51 GPIO lines and supports the SAME53 automotive and Extended grade temperature grading (100/125C).
Architecturally, the SAM E53 integrates a multi-layer bus matrix (AHB/APB) with separate Flash and SRAM ports to allow zero-wait-state 120 MHz operation while the Ethernet MAC and Crypto accelerator perform DMA concurrently. The dual-panel Flash and SRAM with ECC support industrial functional-safety requirements and improve Flash endurance versus single-panel designs.
Typical applications include industrial Ethernet gateways, IoT edge nodes with secure cloud connectivity, USB Human Interface Devices (HID), building automation controllers, smart energy metering, and connected motor-control front-ends. The on-chip 10/100 Ethernet MAC eliminates the need for an external PHY-controller ASIC in cost-sensitive nodes.
When designing with this MCU, plan the pin map for either Ethernet RMII or USB HS usage, since they share SERCOM and GPIO resources. The 64-TQFP requires a 4-layer PCB with continuous power-plane under the exposed pad to meet thermal and EMI requirements for industrial certification.
Drop-in alternatives for ATSAME53J18A-AF — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ATSAME53J18A-AF (same form factor and footprint) — differing in Program Memory (Flash), Operating Temperature, SRAM, USB, ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAME51J18A-AF
✅ Drop-In✓ In Stock
$3.85 / Unit
View Datasheet →ATSAME53J20A-AF
✅ Drop-In✓ In Stock
$4.61 / Unit
View Datasheet →ATSAMD51J18A-AF
✅ Drop-In✓ In Stock
$4.5 / Unit
View Datasheet →ATSAMD51J19A-AFT
✅ Drop-In✓ In Stock
$4.8 / Unit
View Datasheet →ATSAME53J19A-AF
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.9 / Unit
View Datasheet →ATSAME53J18A-AF Maximum Ratings & Electrical Characteristics
| Manufacturer | Microchip Technology |
| Series | SAM E53 |
| Core Processor | ARM Cortex-M4F |
| Core Size | 32-Bit |
| Maximum Clock Frequency | 120 MHz |
| FPU | Yes (single-precision) |
| Program Memory (Flash) | 256 KB (256K x 8) |
| SRAM | 128 KB |
| ECC Support | Yes (Flash and SRAM) |
| Operating Temperature | -40C to +125C (Extended) |
| Ethernet MAC | 10/100 Mbps with IEEE 1588 |
| USB | USB 2.0 Full-Speed Device/Host |
| GPIO Count | 51 (approximate, per 64-pin TQFP) |
| Package | 64-TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead-Free | Yes |
ATSAME53J18A-AF Pin Configuration
| Pin 1 | PA00 — GPIO / SERCOM1.0 pad |
| Pin 2 | PA01 — GPIO / SERCOM1.1 pad |
| Pin 3 | PA02 — GPIO / SERCOM1.2 pad (A/D) |
| Pin 4 | PA03 — GPIO / SERCOM1.3 pad (A/D) |
| Pin 5 | PA04 — GPIO / SERCOM0.0 pad (A/D) |
| Pin 6 | PA05 — GPIO / SERCOM0.1 pad (A/D) |
| Pin 7 | PA06 — GPIO / SERCOM0.2 pad (A/D) |
| Pin 8 | PA07 — GPIO / SERCOM0.3 pad (A/D) |
| Pin 9 | VDD — Core supply voltage |
| Pin 10 | GND — Ground |
| Pin 11 | PA08 — GPIO / SERCOM2.0 / I2S pad |
| Pin 12 | PA09 — GPIO / SERCOM2.1 / I2S pad |
| Pin 13 | PA10 — GPIO / SERCOM2.2 / I2S pad |
| Pin 14 | PA11 — GPIO / SERCOM2.3 / USB DM |
| Pin 15 | PA12 — GPIO / USB DP |
| Pin 16 | PA13 — GPIO / SERCOM4.0 pad |
| Pin 17 | PA14 — GPIO / SERCOM4.1 pad |
| Pin 18 | PA15 — GPIO / SERCOM4.2 pad |
| Pin 19 | PA16 — GPIO / SERCOM3.0 pad (A/D) |
| Pin 20 | PA17 — GPIO / SERCOM3.1 pad (A/D) |
| Pin 21 | PA18 — GPIO / SERCOM3.2 pad (A/D) |
| Pin 22 | PA19 — GPIO / SERCOM3.3 pad (A/D) |
| Pin 23 | PA20 — GPIO / SERCOM5.2 pad |
| Pin 24 | PA21 — GPIO / SERCOM5.3 pad |
| Pin 25 | PA22 — GPIO / SERCOM3.0 pad |
| Pin 26 | PA23 — GPIO / SERCOM3.1 pad |
| Pin 27 | PA24 — GPIO / SERCOM5.2 pad (USB SOF) |
| Pin 28 | PA25 — GPIO / SERCOM5.3 pad |
| Pin 29 | PB00 — GPIO / SERCOM4.2 pad |
| Pin 30 | PB01 — GPIO / SERCOM4.3 pad |
| Pin 31 | PB02 — GPIO / SERCOM5.0 pad (A/D) |
| Pin 32 | PB03 — GPIO / SERCOM5.1 pad (A/D) |
| Pin 33 | PB05 — GPIO / SERCOM4.5 / EIC EXTINT |
| Pin 34 | PB06 — GPIO / SERCOM4.6 pad |
| Pin 35 | PB07 — GPIO / SERCOM4.7 pad |
| Pin 36 | PB08 — GPIO / SERCOM4.0 pad |
| Pin 37 | PB09 — GPIO / SERCOM4.1 pad |
| Pin 38 | PB10 — GPIO / SERCOM4.2 pad |
| Pin 39 | PB11 — GPIO / SERCOM4.3 pad |
| Pin 40 | PB12 — GPIO / SERCOM5.0 pad |
| Pin 41 | PB13 — GPIO / SERCOM5.1 pad |
| Pin 42 | PB14 — GPIO / SERCOM5.2 pad |
| Pin 43 | PB15 — GPIO / SERCOM5.3 pad |
| Pin 44 | VDDIO — I/O supply voltage |
| Pin 45 | GND — Ground |
| Pin 46 | PC00 — GPIO / SERCOM6.0 pad |
| Pin 47 | PC01 — GPIO / SERCOM6.1 pad |
| Pin 48 | PC02 — GPIO / SERCOM6.2 pad |
| Pin 49 | PC03 — GPIO / SERCOM6.3 pad |
| Pin 50 | PC04 — GPIO / SERCOM7.0 pad |
| Pin 51 | PC05 — GPIO / SERCOM7.1 pad |
| Pin 52 | PC06 — GPIO / SERCOM7.2 pad |
| Pin 53 | PC07 — GPIO / SERCOM7.3 pad |
| Pin 54 | PC08 — GPIO / SERCOM6.0 pad |
| Pin 55 | PC09 — GPIO / SERCOM6.1 pad |
| Pin 56 | PC10 — GPIO / SERCOM6.2 pad |
| Pin 57 | PC11 — GPIO / SERCOM6.3 pad |
| Pin 58 | PC12 — GPIO / SERCOM7.0 pad |
| Pin 59 | PC13 — GPIO / SERCOM7.1 pad |
| Pin 60 | PC14 — GPIO / SERCOM7.2 pad |
| Pin 61 | PC15 — GPIO / SERCOM7.3 pad |
| Pin 62 | RESET — Reset input (active low) |
| Pin 63 | VDD — Core supply voltage |
| Pin 64 | GND — Ground |
Typical Applications
ATSAME53J18A-AF is suitable for 6 applications: Industrial Ethernet Gateway, USB Human Interface Device (HID), Secure IoT Edge Node, Building Automation Controller, Connected Motor-Control Front-End, Smart Energy Metering.
Industrial Ethernet Gateway
The ATSAME53J18A-AF integrates a 10/100 Mbps Ethernet MAC with IEEE 1588 PTP timestamping, removing the need for a discrete Ethernet ASIC in cost-sensitive industrial nodes. Combined with the 120 MHz Cortex-M4F and 256 KB Flash, it can run Modbus TCP, EtherNet/IP, or PROFINET stacks while leaving cycles for application logic. The hardware AES/SHA accelerator offloads TLS handshakes for secure MQTT or HTTPS cloud links. Place an external PHY on the RMII pins and add a TVS diode array on the MDI lines for surge compliance.
Recommended
USB Human Interface Device (HID)
The ATSAME53J18A-AF's USB 2.0 Full-Speed Device/Host port with on-chip PHY simplifies USB HID designs such as keyboards, mice, game controllers, and custom peripherals. The 120 MHz core runs the USB stack plus application code with headroom for HID report processing and debounce algorithms. The 51 GPIO in the 64-TQFP package provide abundant pins for scan matrices and indicators. The Crypto accelerator is unused here but available for secure firmware-update HID variants.
Recommended
Secure IoT Edge Node
The ATSAME53J18A-AF's hardware Cryptographic Accelerator (AES-256, SHA-256, TRNG) accelerates TLS 1.3 handshakes by an order of magnitude versus software-only implementations. With 256 KB Flash, it can host a full wolfSSL or mbedTLS client plus an MQTT-SN or CoAP application layer. The 10/100 Ethernet MAC and six SERCOM interfaces give designers flexible connectivity to sensors, radios, or subordinate MCUs. The -40C to +125C temperature grade suits outdoor or factory-floor deployment.
Recommended
Building Automation Controller
Building automation controllers for HVAC, lighting, and access systems benefit from the ATSAME53J18A-AF's combination of Ethernet, USB, and multiple SERCOM channels. The 12-bit 1 Msps ADC handles sensor inputs (temperature, humidity, CO2) directly without external converters, while the Cortex-M4F's DSP instructions accelerate control-loop math. The 64-TQFP package is footprint-compatible across the SAM E53 family, allowing late-stage BOM swaps between 'J18' and 'J20' Flash variants without PCB changes.
Recommended
Connected Motor-Control Front-End
Field-oriented control (FOC) front-ends for BLDC and PMSM motors benefit from the ATSAME53J18A-AF's Cortex-M4F single-precision FPU, which accelerates Park/Clarke transforms and PI loops at 120 MHz. The dual-panel Flash supports live firmware updates without halting motor control, while the ECC detects bit-flips in harsh EMI environments typical of variable-frequency drives. The Ethernet MAC exposes VFD diagnostics to plant SCADA systems, and the six SERCOM channels drive isolated gate-driver communication.
Recommended
Smart Energy Metering
Single-phase and polyphase smart meters leverage the ATSAME53J18A-AF's 12-bit ADC for voltage and current sensing plus its Cortex-M4F DSP extensions for harmonic analysis up to the 31st order. The 256 KB Flash hosts the metrology library plus DLMS/COSEM or Modbus stack, and the Ethernet MAC supports AMR/AMI backhaul. Hardware AES-256 secures billing data and prevents meter-tampering fraud. The -40C to +125C extended temperature grade handles outdoor meter enclosures.
Recommended
Recommended Products Summary
Engineering reference data for ATSAME53J18A-AF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAME51J18A-AF | ATSAME53J20A-AF | ATSAMD51J18A-AF | ATSAMD51J19A-AF | ATSAME53J19A-AF |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-TQFP (10x10) | 64-TQFP (10x10) - same | 64-TQFP (10x10) - same | 64-TQFP (10x10) - same | 64-TQFP (10x10) - same | 64-TQFP (10x10) - same |
| Core / Frequency | Cortex-M4F / 120 MHz | Cortex-M4F / 120 MHz | Cortex-M4F / 120 MHz | Cortex-M4F / 120 MHz | Cortex-M4F / 120 MHz | Cortex-M4F / 120 MHz |
| Flash | 256 KB | 256 KB | 512 KB | 256 KB | 512 KB | 512 KB |
| SRAM | 128 KB | 128 KB | 256 KB | 128 KB | 192 KB | 256 KB |
| Crypto Accelerator | Yes (AES/SHA/TRNG) | No | Yes (AES/SHA/TRNG) | No | No | Yes (AES/SHA/TRNG) |
| Ethernet MAC | 10/100 + IEEE 1588 | 10/100 + IEEE 1588 | 10/100 + IEEE 1588 | 10/100 + IEEE 1588 | 10/100 + IEEE 1588 | 10/100 + IEEE 1588 |
| USB | USB 2.0 FS Device/Host | USB 2.0 FS Device/Host | USB 2.0 FS Device/Host | USB 2.0 FS Device/Host | USB 2.0 FS Device/Host | USB 2.0 FS Device/Host |
| Temperature Grade | -40C to +125C Extended | -40C to +125C Extended | -40C to +125C Extended | -40C to +125C Extended | -40C to +125C Extended | -40C to +125C Extended |
| Param Match | 100% | 90% (no Crypto) | 100% (more Flash) | 90% (no Crypto) | 90% (no Crypto, more Flash) | 100% (more Flash) |
Key Differentiators
- Hardware Cryptographic Accelerator (AES-256 / SHA-256 / TRNG) (vs ATSAME51J18A-AF)
- Pin-compatible Flash upgrade within the SAME53 family (vs ATSAME53J20A-AF)
- Industrial Ethernet MAC with IEEE 1588 PTP timestamping (vs ATSAMD51J18A-AF)
Design Notes
The ATSAME53J18A-AF requires a clean 3.3V supply for VDDIO and a regulated 1.2V core rail generated by the internal DC-DC converter or an external LDO. Decouple VDD with a 1 uF X7R ceramic placed within 3 mm of each VDD pin, plus a bulk 10 uF tantalum or polymer cap. The internal DC-DC converter's inductor (4.7 uH shielded) and bootstrap capacitor must follow the SAME53 family reference design exactly - deviating from these values can cause 5-10% efficiency loss and ripple-induced ADC noise.
Estimated: At 120 MHz CPU clock, the device draws approximately 30 mA active current on the 1.2V core rail. Designs that omit sufficient bulk capacitance on the 3.3V rail may brown-out during USB bus-resets or Ethernet PHY power-up transients. Add at least 22 uF bulk on VDDIO plus a ferrite bead isolation when sharing the rail with RF or motor drivers.
Place the 64-TQFP exposed pad on a continuous ground plane with at least 8 thermal vias (0.3 mm drill, 0.6 mm pitch) to the bottom layer. Route the Ethernet RMII traces as 50-ohm controlled-impedance pairs with matched lengths (within 2 mm) between the MCU and the external PHY. Keep SERCOM and USB traces away from switching power inductors by at least 5 mm to prevent radiated-noise coupling into the ADC channels.
Compliance Information
RoHS and REACH compliance per Microchip product page. Not AEC-Q100 qualified - for AEC-Q100 automotive use, see ATSAME53J18A-AF AEC variant or contact Microchip for the -AUT automotive grade option.
