ATSAME53J18A-AFT - 120MHz Cortex-M4F MCU, 256KB Flash, 64-TQFP | Microchip
MPN: ATSAME53J18A-AFT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.92 | $7.92 |
| 10 | $7.45 | $74.50 |
| 100 | $6.52 | $652.00 |
| 500 | $5.84 | $2,920.00 |
| 1,000 | $5.21 | $5,210.00 |
ATSAME53J18A-AFT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory, and programmable peripherals on one die. The ARM Cortex-M4F is a 32-bit processor core with DSP extensions and a hardware FPU, positioned between the Cortex-M3 (no FPU) and Cortex-M7 (higher performance). Within the broader taxonomy, the ATSAME53J18A belongs to the Cortex-M4F class -> ARM Cortex-M family -> 32-bit MCU -> microcontroller -> embedded processor -> semiconductor. The "SAM E" series from Microchip is engineered for mixed-signal industrial designs with on-chip high-speed ADCs, USB, CAN-FD, and Ethernet.
Key features of the ATSAME53J18A include a Cortex-M4F core with FPU at 120 MHz, 256 KB dual-panel Flash with ECC, 128 KB SRAM with ECC, 10/100 Ethernet MAC, USB 2.0 Full-Speed, CAN-FD, a 12-bit 1 MSPS ADC, and multiple SERCOM (serial communication) interfaces. The Cortex-M4F core adds DSP instructions and single-precision FPU support, enabling efficient execution of sensor-fusion algorithms and audio processing in firmware. The device operates from 1.71 V to 3.6 V across an industrial temperature range of -40C to +125C.
The SAM E53 series uses a dual-panel Flash architecture that allows simultaneous read-while-write, enabling live firmware updates without halting code execution. The integrated Ethernet MAC with IEEE 1588 PTP hardware timestamping and the on-chip high-speed USB make the part well-suited for connected industrial nodes. A 12-bit 1 MSPS ADC and two 12-bit 1 MSPS DACs provide analog front-end capability, while the CryptoCell (TRNG, AES, SHA) variants support secure-boot and TLS acceleration on similar siblings.
Typical applications include industrial Ethernet gateways, building-automation controllers, USB peripherals, sensor hubs with on-chip DSP conditioning, graphical HMIs with TFT drives on sibling parts, and connected medical devices. The combination of Ethernet + USB + CAN-FD makes this MCU a common choice for protocol-conversion bridges. The 64-TQFP footprint also supports hand-solderable prototyping.
When designing with the ATSAME53J18A-AFT, ensure the 64-TQFP land pattern matches the -AU (Tray) variant if you need to swap packaging. Decoupling: place a 100 nF X7R capacitor on each VDD pin and a bulk 4.7 uF near the package. For Ethernet, the integrated MAC requires an external PHY such as the KSZ8081 and 49.9 ohm 1% termination resistors. Configure unused pins as outputs driven low to minimize current draw.
This page synthesizes distributor pricing tiers, drop-in same-package alternatives from the SAM E53 family, and practical design notes not found in the standalone Microchip datasheet.
Drop-in alternatives for ATSAME53J18A-AFT — 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-AFT (same form factor and footprint) — differing in DAC, Operating Temperature, SRAM, ADC, CAN.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAME53J19A-AFT
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAME53J20A-AFT
✅ Drop-In✓ In Stock
$5.62 / Unit
View Datasheet →ATSAME53J18A-AU
✅ Drop-In✓ In Stock
$4.66 / Unit
View Datasheet →ATSAME53J18A-AUT
✅ Drop-In✓ In Stock
$4.12 / Unit
View Datasheet →ATSAME53J18A-AFT Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M4F with FPU |
| Core Size | 32-bit |
| Maximum Clock Speed | 120 MHz |
| Program Memory Size | 256 KB (256K x 8) Flash with ECC |
| Supply Voltage Range | 1.71 V to 3.6 V |
| Operating Temperature Range | -40C to +125C (Extended Industrial) |
| Package Type | 64-TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Communication Interfaces | USB 2.0 Full-Speed, 10/100 Ethernet MAC, CAN-FD, SERCOM (UART/SPI/I2C) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| Series | SAM E53 |
| Peripherals Include | DMA, CRC, Event System, PTC (Touch) |
| DSP Instructions | Yes (Cortex-M4 DSP extensions) |
| FPU | Yes (single-precision) |
ATSAME53J18A-AFT Pin Configuration
| Pin 1 | PA00 — GPIO / SERCOM1[0] / TCC2[0] / ADC[0] / EIC[0] |
| Pin 2 | PA01 — GPIO / SERCOM1[1] / TCC2[1] / ADC[1] / EIC[1] |
| Pin 3 | PA02 — GPIO / SERCOM3[0] / ADC[2] / AIN[0] / DAC[0] |
| Pin 4 | PA03 — GPIO / SERCOM3[1] / ADC[3] / AIN[1] / DAC[1] |
| Pin 5 | PA04 — GPIO / SERCOM0[0] / TCC0[0] / ADC[4] |
| Pin 6 | PA05 — GPIO / SERCOM0[1] / TCC0[1] / ADC[5] |
| Pin 7 | PA06 — GPIO / SERCOM0[2] / TCC1[0] / ADC[6] |
| Pin 8 | PA07 — GPIO / SERCOM0[3] / TCC1[1] / ADC[7] |
| Pin 9 | VDDIO — I/O supply voltage |
| Pin 10 | GND — Ground |
| Pin 11 | PA08 — GPIO / SERCOM2[0] / TCC0[0] / NMI |
| Pin 12 | PA09 — GPIO / SERCOM2[1] / TCC0[1] |
| Pin 13 | PA10 — GPIO / SERCOM2[2] / TCC1[0] |
| Pin 14 | PA11 — GPIO / SERCOM2[3] / TCC1[1] |
| Pin 15 | PA12 — GPIO / SERCOM4[0] / TCC2[0] |
| Pin 16 | PA13 — GPIO / SERCOM4[1] / TCC2[1] |
| Pin 17 | PA14 — GPIO / SERCOM4[2] / TCC3[0] |
| Pin 18 | PA15 — GPIO / SERCOM4[3] / TCC3[1] |
| Pin 19 | PA16 — GPIO / SERCOM1[0] / TCC0[2] |
| Pin 20 | PA17 — GPIO / SERCOM1[1] / TCC0[3] |
| Pin 21 | PA18 — GPIO / SERCOM1[2] / TCC0[4] |
| Pin 22 | PA19 — GPIO / SERCOM1[3] / TCC0[5] |
| Pin 23 | PA20 — GPIO / SERCOM5[0] / TCC1[0] |
| Pin 24 | PA21 — GPIO / SERCOM5[1] / TCC1[1] |
| Pin 25 | PA22 — GPIO / SERCOM5[2] / TCC1[2] |
| Pin 26 | PA23 — GPIO / SERCOM5[3] / TCC1[3] |
| Pin 27 | PA24 — GPIO / SERCOM3[0] / USB_DM |
| Pin 28 | PA25 — GPIO / SERCOM3[1] / USB_DP |
| Pin 29 | PB00 — GPIO / SERCOM5[2] |
| Pin 30 | PB01 — GPIO / SERCOM5[3] |
| Pin 31 | PB02 — GPIO / SERCOM5[0] / ADC[14] |
| Pin 32 | PB03 — GPIO / SERCOM5[1] / ADC[15] |
| Pin 33 | PB04 — GPIO / SERCOM3[0] |
| Pin 34 | PB05 — GPIO / SERCOM3[1] |
| Pin 35 | PB06 — GPIO / SERCOM3[2] |
| Pin 36 | PB07 — GPIO / SERCOM3[3] |
| Pin 37 | PB08 — GPIO / SERCOM4[0] / TCC3[0] |
| Pin 38 | PB09 — GPIO / SERCOM4[1] / TCC3[1] |
| Pin 39 | PB10 — GPIO / SERCOM4[2] / TCC4[0] |
| Pin 40 | PB11 — GPIO / SERCOM4[3] / TCC4[1] |
| Pin 41 | PB12 — GPIO / SERCOM4[0] / TCC5[0] / EIC[12] |
| Pin 42 | PB13 — GPIO / SERCOM4[1] / TCC5[1] |
| Pin 43 | PB14 — GPIO / SERCOM4[2] / TCC5[0] |
| Pin 44 | PB15 — GPIO / SERCOM4[3] / TCC5[1] |
| Pin 45 | PC00 — GPIO / SERCOM6[0] |
| Pin 46 | PC01 — GPIO / SERCOM6[1] |
| Pin 47 | PC02 — GPIO / SERCOM6[2] |
| Pin 48 | PC03 — GPIO / SERCOM6[3] |
| Pin 49 | VDDCORE — Internal core voltage regulator output (decoupling) |
| Pin 50 | GND — Ground |
| Pin 51 | PC04 — GPIO / SERCOM7[0] |
| Pin 52 | PC05 — GPIO / SERCOM7[1] |
| Pin 53 | PC06 — GPIO / SERCOM7[2] / CAN-FD TX |
| Pin 54 | PC07 — GPIO / SERCOM7[3] / CAN-FD RX |
| Pin 55 | PC08 — GPIO / SERCOM6[0] |
| Pin 56 | PC09 — GPIO / SERCOM6[1] |
| Pin 57 | PC10 — GPIO / SERCOM6[2] |
| Pin 58 | PC11 — GPIO / SERCOM6[3] |
| Pin 59 | PC12 — GPIO / SERCOM7[0] |
| Pin 60 | PC13 — GPIO / SERCOM7[1] |
| Pin 61 | PC14 — GPIO / SERCOM7[2] / XTAL32_IN |
| Pin 62 | PC15 — GPIO / SERCOM7[3] / XTAL32_OUT |
| Pin 63 | RESETN — Active-low external reset |
| Pin 64 | VDD — Main supply voltage input |
Typical Applications
ATSAME53J18A-AFT is suitable for 6 applications: Industrial Ethernet Gateway, USB Peripheral Device, Building Automation Controller, Sensor Hub with DSP Conditioning, CAN-FD Automotive Body Controller, Connected Medical Device Node.
Industrial Ethernet Gateway
The ATSAME53J18A-AFT is well suited for industrial Ethernet gateway designs where it converts fieldbus traffic into TCP/IP streams for SCADA systems. Its integrated 10/100 Ethernet MAC with IEEE 1588 hardware timestamping delivers deterministic latency for PROFINET and EtherNet/IP profiles, and the Cortex-M4F DSP instructions accelerate protocol stack filtering. Compared to an external-MAC solution, the on-chip MAC removes an SPI/parallel bus to the PHY and reduces pin count by 12-16 pins. Use it with a companion KSZ8081 PHY, 49.9 ohm 1% termination, and a 25 MHz crystal for full duplex 100BASE-TX operation at 120 MHz CPU headroom for the TCP/IP stack.
Recommended
USB Peripheral Device
For USB device-class peripherals such as custom HID, CDC, or vendor-class endpoints, the ATSAME53J18A-AFT provides a USB 2.0 Full-Speed peripheral on-chip without external PHY. The Cortex-M4F core at 120 MHz easily handles Full-Speed (12 Mbps) bulk transfers and DSP-driven audio streaming over USB. Compared to a discrete USB controller, the integrated peripheral reduces BOM cost by approximately $0.50 and frees the I/O used for parallel data/address buses. Pair with the ATSAME51J18A-AF in cost-optimized siblings and use the same Harmony 3 USB stack source for faster prototyping.
Recommended
Building Automation Controller
The ATSAME53J18A-AFT fits building automation controller nodes (BACnet, KNX, Modbus bridges) with its multi-protocol SERCOM interfaces, CAN-FD bus controller, and industrial temperature rating. The Cortex-M4F FPU accelerates floating-point loops used in HVAC control algorithms, while the 256 KB Flash accommodates the BACnet stack and Modbus libraries simultaneously. Compared to smaller Cortex-M0+ parts, the SAM E53 series delivers 5-10x more processing headroom at similar price points. The on-chip 12-bit ADC simplifies analog sensor interfaces for temperature and humidity inputs.
Recommended
Sensor Hub with DSP Conditioning
For sensor-hub designs that aggregate IMU, pressure, and environmental sensors over SPI/I2C and apply on-chip DSP filtering, the ATSAME53J18A-AFT is an ideal choice. Its Cortex-M4F SIMD instructions (single-cycle MAC) execute CMSIS-DSP FIR/IIR filters at high sample rates, while 128 KB SRAM (per SAM E53 family) buffers multi-sensor streams without external memory. Compared to Cortex-M0/M0+ sensor hubs, the SAM E53F series typically delivers 3-5x faster filter throughput. On-chip DMA offloads SERCOM/I2C transfers from the CPU.
Recommended
CAN-FD Automotive Body Controller
In automotive body-control modules (window lifters, lighting, seat controllers), the ATSAME53J18A-AFT handles CAN-FD bus traffic at up to 5 Mbps, outperforming classic CAN. Its hardware CRC engine offloads CAN-FD payload verification from the CPU, freeing the Cortex-M4F for actuator PID loops. The industrial temperature range (-40C to +125C) accommodates cabin environments. Compared to a discrete CAN-FD controller plus MCU, the integrated peripheral cuts BOM by approximately $1.20 and reduces PCB area. For AEC-Q100 Grade 0 automotive qualification, review the SAM E53-Q1 variants.
Recommended
Connected Medical Device Node
The ATSAME53J18A-AFT can power portable or connected medical device nodes such as pulse oximeters, infusion pump secondary controllers, or patient-monitoring telemetry modules. Its hardware FPU executes SpO2 algorithm math accurately, while the Ethernet MAC and USB peripherals support medical network connectivity. Compared to Cortex-M3-based medical nodes, the Cortex-M4F on SAM E53 devices accelerates DSP-driven signal conditioning by approximately 4x. The integrated 12-bit 1 MSPS ADC captures sensor signals without external front-end. Use with appropriate isolation and FDA-compliant firmware practices.
Recommended
Recommended Products Summary
Engineering reference data for ATSAME53J18A-AFT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAME53J19A-AFT | ATSAME53J20A-AFT | ATSAME53J18A-AU | ATSAME53J18A-AUT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-TQFP (10x10 mm) | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same |
| Core | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz |
| Flash | 256 KB | 512 KB | 1 MB | 256 KB | 256 KB |
| CryptoCell | No | Yes (AES/SHA/TRNG) | Yes (AES/SHA/TRNG) | No | No |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +85C |
| Packaging Format | Tape & Reel (-AFT) | Tape & Reel | Tape & Reel | Tray | Tape & Reel |
| Ethernet MAC | 10/100 with IEEE 1588 | 10/100 with IEEE 1588 | 10/100 with IEEE 1588 | 10/100 with IEEE 1588 | 10/100 with IEEE 1588 |
Key Differentiators
- On-chip 10/100 Ethernet MAC with IEEE 1588 hardware timestamping (vs ATSAMD51J19A-AU)
- Dual-panel Flash with read-while-write (vs ATSAM3X8E (legacy ARM Cortex-M3 part))
- Cortex-M4F DSP + FPU at 120 MHz (vs Cortex-M0+ SAM D10/20)
Design Notes
The ATSAME53J18A-AFT integrates a 1.71 V to 3.6 V supply input that feeds an internal LDO producing VDDCORE at 1.2 V for the Cortex-M4F logic. Place a 100 nF X7R decoupling capacitor on each VDD pin within 3 mm of the pad, and a single 4.7 uF X5R bulk capacitor near the VDDCORE pin. For Ethernet-enabled designs, power the PHY from a separate rail filtered through a ferrite bead to isolate digital switching noise from the analog Ethernet signals. Avoid switching VDDIO and VDDIN from the same rail as the Ethernet transformer return path.
For 64-TQFP (10x10 mm) layouts, route all SERCOM and GPIO signals on the top layer directly to pads, then break out the inner rows through inner layers. Place the 32 kHz crystal (XIN32/XOUT32 on PC14/PC15) within 5 mm of the MCU pins with ground guard traces to reduce load-capacitance drift. The Ethernet PHY MDI traces should be 100 ohm differential, length-matched within 2 mm, and routed over a continuous ground plane. Keep the analog AVSS pin tied directly to the ground plane via a single via.
At 120 MHz over full industrial temperature (-40C to +125C), the ATSAME53J18A-AFT dissipates approximately 0.4 W typical active power (per SAM E53 family typical-characterization data, exact value datasheet-dependent). The 64-TQFP package has a theta_JA around 60 C/W on a 4-layer JEDEC test board, yielding a 24C temperature rise above ambient at typical load - well within thermal limits. For continuous heavy-load applications, expose the bottom thermal pad to a 1 oz copper pour on the top layer to drop the effective theta_JA by 10-15 C/W.
Common pitfalls when migrating from ATSAMD21 to ATSAME53J18A-AFT: (1) SERCOM numbering differs - SAMD21 has up to 6 SERCOM while SAME53 has 8; verify instance-to-pin mappings. (2) GCLK (Generic Clock Controller) on SAME53 is more flexible but requires explicit configuration in the MCLK setup. (3) The ADC on SAME53 supports 12-bit at 1 MSPS versus SAMD21's 12-bit at 200 kSPS - update sampling-time calculations. (4) Ethernet MAC requires an external 25 MHz crystal, not 12 MHz as on some SAMD variants.
Route the USB DP/DM pair (PA24/PA25) as a 90 ohm differential pair, length-matched within 0.5 mm, with no more than 2 vias total per trace. Place the 22 ohm series damping resistors within 5 mm of the MCU pins. For the CAN-FD bus (PC06/PC07), use a 120 ohm differential impedance with termination at the bus ends only. Decoupling for high-speed peripherals should be placed on the opposite side of the PCB directly under the IC pad using micro-vias.
Compliance Information
RoHS compliant and Pb-free per Microchip environmental compliance statements for the SAM E53 family. Not AEC-Q100 qualified - for AEC-Q100 Grade 0 automotive applications use the SAM E53-Q1 variants. Halogen-free per JEDEC JS709B.
