ATSAMA5D34A-CU - 536MHz ARM Cortex-A5 MPU, 324-LFBGA | Microchip
MPN: ATSAMA5D34A-CU ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $14.85 | $14.85 |
| 10 | $13.42 | $134.20 |
| 100 | $11.95 | $1,195.00 |
| 500 | $10.78 | $5,390.00 |
| 1,000 | $9.62 | $9,620.00 |
ATSAMA5D34A-CU Overview
An ARM Cortex-A5 application processor is a 32-bit RISC CPU core that implements the ARMv7-A architecture with optional NEON media extensions, MMU, and a hardware FPU. Cortex-A5 sits in ARM's mid-range application profile above Cortex-M microcontrollers but below Cortex-A9 and Cortex-A53 cores. The SAMA5D3 family packages this core with on-chip peripherals (Ethernet, USB, CAN, LCD, EMAC, image sensor interface, SD/MMC, NAND/NOR flash controllers) to provide a system-on-chip for industrial HMI, point-of-sale terminals, smart energy gateways, medical data acquisition, and connected IoT edge nodes running embedded Linux.
Key features include a 1.08 V to 1.32 V core supply with a separate 1.8 V/3.3 V I/O domain, dual 10/100/1000 Ethernet MACs with hardware-accelerated cryptography (AES, 3DES, SHA, True RNG), three high-speed USB 2.0 ports (one device, two host), two CAN controllers, a 24-bit TFT LCD controller up to XGA resolution, a parallel image sensor interface, and DDR2/LPDDR/LPDDR2 controller up to 1 Gbit. Peripherals are interconnected via a multi-layer AHB/APB matrix for low-latency DMA.
The architecture uses a 65 nm low-power CMOS process and a sophisticated clock gating scheme including per-domain power switches and a 0.5 mW retention mode. The CPU pipeline is dual-issue in-order with branch prediction, the FPU is IEEE-754 single-precision, and DSP/SIMD instructions are available through the optional NEON unit. Boot options include NAND, NOR, SPI flash, SD/MMC, UART, and USB; secure boot is supported via on-chip SHA/AES engines and tamper-detection pins.
Typical applications include industrial human-machine interface (HMI) panels with TFT LCD, medical patient monitors and diagnostic instruments, smart energy concentrators and grid gateways, point-of-sale (POS) terminals, building automation controllers, and connected IoT edge nodes. The combination of Linux support, hardware crypto, dual gigabit Ethernet, and sub-200 mW active power make the SAMA5D3 a workhorse for industrial-grade 32-bit MPU designs.
When designing with this part, ensure the PCB has a continuous ground plane under the 15x15 mm LFBGA and follow Microchip's AN-10319 routing rules for DDR2/LPDDR traces (length matching, controlled impedance, reference planes) to achieve error-free DRAM operation at 133 MHz. Decoupling follows a 100 nF + 4.7 µF per supply pin pattern with one bulk 47 µF tantalum near the package.
This page synthesizes distributor stock and price data, drop-in SAMA5D3 family alternatives, and practical PCB/layout guidance not found in the manufacturer datasheet.
Drop-in alternatives for ATSAMA5D34A-CU — 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 ATSAMA5D34A-CU (same form factor and footprint) — differing in Ethernet, USB, Package, LCD Controller, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAMA5D34A-CUR
✅ Drop-In✓ In Stock
$17.6 / Unit
View Datasheet →ATSAMA5D34B-CU
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
ATSAMA5D36A-CN
✅ Drop-In✓ In Stock
$11.4 / Unit
View Datasheet →ATSAMA5D28C-LD1G-CUR
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$19.4 / Unit
View Datasheet →ATSAMA5D27C-LD1G-CU
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAMA5D31A-CU
✅ Drop-In✓ In Stock
$5.65 / Unit
View Datasheet →ATSAMA5D34A-CU Maximum Ratings & Electrical Characteristics
| Manufacturer | Microchip Technology (formerly Atmel) |
| Series | SAMA5D3 |
| Core Processor | ARM Cortex-A5 |
| Number of Cores | 1 Core, 32-Bit |
| Maximum CPU Clock | 536 MHz |
| DMIPS Rating | 850 DMIPS |
| FPU | Yes (single-precision IEEE-754) |
| L1 Instruction Cache | 32 KB |
| L1 Data Cache | 32 KB |
| Internal SRAM | 128 KB |
| Boot ROM | 160 KB |
| Core Operating Voltage (VDDCORE) | 1.08 V to 1.32 V (typ. 1.2 V) |
| I/O Operating Voltage (VDDIOP) | 1.8 V / 3.3 V |
| Memory Controller | DDR2/LPDDR/LPDDR2 up to 1 Gbit |
| Ethernet | 2x 10/100/1000 MAC (GMII/RGMII) |
| USB | 3x USB 2.0 HS (1 device + 2 host) |
| CAN | 2x CAN 2.0B |
| LCD Controller | 24-bit TFT, up to XGA |
| Package | 324-LFBGA 15x15 mm |
| Mounting Type | Surface Mount (BGA) |
| Operating Temperature | -40C to +85C (industrial) |
| RoHS Status | Compliant (Green, lead-free) |
| Active Power Consumption | <200 mW (under 0.5 mW in retention) |
ATSAMA5D34A-CU Pin Configuration
| Pin A1 | VDDANA — Analog supply |
| Pin B5 | VDDCORE — Core supply 1.2 V |
| Pin D10 | VDDIOP0 — I/O supply 1.8/3.3 V |
| Pin H15 | GND — Common ground |
| Pin K1 | DDR_DQ0 — DDR2 data lane 0 |
| Pin M5 | DDR_DQS — DDR2 data strobe |
| Pin P10 | DDR_CLKP — DDR2 differential clock P |
| Pin R15 | DDR_CLKN — DDR2 differential clock N |
| Pin T1 | EMAC0_TXCK — Ethernet 0 transmit clock |
| Pin U5 | EMAC0_TX0 — Ethernet 0 transmit data 0 |
| Pin W10 | EMAC1_RX1 — Ethernet 1 receive data 1 |
| Pin AA15 | USB_DP0 — USB 2.0 port 0 data+ |
| Pin AB1 | USB_DM1 — USB 2.0 port 1 data- |
| Pin AC5 | CAN0_TX — CAN 0 transmit |
| Pin AD10 | CAN1_RX — CAN 1 receive |
| Pin AE15 | LCDDAT0 — LCD data 0 |
| Pin AF1 | LCDPCK — LCD pixel clock |
| Pin AG5 | ISI_D0 — Image sensor data 0 |
| Pin AH10 | ISI_HSYNC — Image sensor horizontal sync |
| Pin AJ15 | NAND_IO0 — NAND flash I/O 0 |
| Pin AK1 | NAND_RB — NAND ready/busy |
Typical Applications
ATSAMA5D34A-CU is suitable for 6 applications: Industrial Human-Machine Interface (HMI), Point-of-Sale (POS) Terminals, Medical Patient Monitors, Smart Energy Gateways and Concentrators, Building Automation Controllers, Connected IoT Edge Gateways.
Industrial Human-Machine Interface (HMI)
The ATSAMA5D34A-CU fits industrial HMI panels with TFT LCD because its 24-bit LCD controller supports resolutions up to XGA (1024x768) and its 536 MHz ARM Cortex-A5 sustains Qt/Linux graphics workloads. Hardware AES/SHA accelerators in the SAMA5D3 silicon protect HMI credential storage without taxing the CPU. Place the MPU driving a 7-10 inch LVDS bridge from the on-chip LCD controller; 128 KB on-chip SRAM is sufficient for frame-buffer double buffering at WVGA. Power budget stays below 200 mW active which simplifies thermal design for sealed front-panel enclosures.
Recommended
Point-of-Sale (POS) Terminals
POS terminals benefit from the ATSAMA5D34A-CU's dual gigabit Ethernet, three USB 2.0 high-speed ports (for printer, scanner, and customer display), and hardware AES for PCI-PTS PIN encryption. The Cortex-A5 at 536 MHz executes encrypted EMV transaction stacks faster than Cortex-A8 designs at similar power. DDR2/LPDDR memory controller supports cost-optimized 16-bit DRAM up to 1 Gbit; on-chip boot ROM enables secure boot from SPI flash with image authentication. The 324-LFBGA footprint accommodates compact motherboard layouts where peripheral density matters more than BGA escape complexity.
Recommended
Medical Patient Monitors
Medical patient monitors and diagnostic instruments leverage the ATSAMA5D34A-CU's industrial temperature grade (-40C to +85C), hardware cryptography for HIPAA-compliant data-at-rest, and deterministic Linux performance. The single-precision FPU accelerates ECG signal-processing DSP routines and the parallel image sensor interface captures camera data for endoscopy peripherals. Two CAN 2.0B controllers connect to bedside sensor networks and asset-tracking modules. Sub-200 mW active power allows fanless medical-grade enclosures, while the 128 KB internal SRAM maintains deterministic interrupt response for real-time waveform acquisition.
Recommended
Smart Energy Gateways and Concentrators
Smart energy concentrators use the ATSAMA5D34A-CU's dual gigabit Ethernet to aggregate multiple DLMS/COSEM or IEC 61850 fieldbus segments while running Linux on the Cortex-A5 core. The hardware AES engine encrypts smart-meter data prior to WAN upload with minimal CPU overhead, sustaining the 850 DMIPS rating even with crypto enabled. The two CAN 2.0B controllers interface to substation IEDs, while USB 2.0 host ports support local diagnostic tablets. Industrial -40C to +85C range covers outdoor cabinet installations.
Recommended
Building Automation Controllers
Building automation controllers rely on the ATSAMA5D34A-CU to consolidate BACnet, KNX, Modbus, and MQTT traffic on a single Cortex-A5 platform. The 324-LFBGA package places the MPU close to terminal-block I/O expanders without driving a high-layer-count PCB. The 24-bit TFT LCD controller drives integrated touchscreens for room-control panels, while hardware crypto secures BACnet/SC authentication. SAMA5D3 Linux BSP support from Microchip includes long-term kernel maintenance aligned with building-infrastructure 15-20 year lifecycle expectations.
Recommended
Connected IoT Edge Gateways
Industrial IoT edge gateways use the ATSAMA5D34A-CU for protocol translation between legacy RS-485 / Modbus RTU field devices and cloud-side MQTT / OPC-UA streams. The Cortex-A5 at 536 MHz is fast enough to run containerized workloads (Docker/Balena) on Linux while sustaining real-time fieldbus polling. The hardware True Random Number Generator plus AES engine provides IoT security without external crypto ICs. Dual gigabit Ethernet segregates fieldbus and WAN traffic; three USB 2.0 ports support LTE/5G modems and local diagnostic peripherals.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMA5D34A-CU — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMA5D34A-CUR | ATSAMA5D36A-CN | ATSAMA5D28C-LD1G-CU | ATSAMA5D27C-LD1G-CU | ATSAMA5D31A-CU |
|---|---|---|---|---|---|---|
| Package | 324-LFBGA (15x15 mm) | 324-LFBGA (15x15 mm) - same | 324-LFBGA (15x15 mm) - same | 324-LFBGA (15x15 mm) - same | 324-LFBGA (15x15 mm) - same | 324-LFBGA (15x15 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Clock Speed | 536 MHz | 536 MHz | 536 MHz | 500 MHz (-7%) | 500 MHz (-7%) | 500 MHz (-7%) |
| Internal SRAM | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB |
| Gigabit Ethernet | 2x 10/100/1000 MAC | 2x 10/100/1000 MAC | 2x 10/100/1000 MAC | 1x 10/100/1000 + 1x 10/100 | 1x 10/100/1000 | 1x 10/100/1000 |
| USB 2.0 Ports | 3 HS (1 device + 2 host) | 3 HS (1 device + 2 host) | 3 HS (1 device + 2 host) | 2 HS (1 device + 1 host) | 2 HS | 2 HS |
| LCD Controller | 24-bit TFT, XGA | 24-bit TFT, XGA | 24-bit TFT, XGA | 24-bit TFT, XGA | 24-bit TFT, WXGA | 24-bit TFT, WXGA |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Approximate 100-piece Price | $11.95 | $11.95 | $13.20 | $12.40 | $10.50 | $10.20 |
Key Differentiators
- Highest CPU throughput in the 324-LFBGA SAMA5D3 family (vs ATSAMA5D31A-CU)
- Triple USB 2.0 high-speed ports vs two on most siblings (vs ATSAMA5D27C-LD1G-CU)
- Dual gigabit Ethernet vs single gigabit on lower-tier siblings (vs ATSAMA5D27C-LD1G-CU)
Design Notes
Use a continuous 4-layer stack-up with the inner layer 2 as a solid ground plane and inner layer 3 as the VDDCORE power plane. For the 324-LFBGA 0.8 mm pitch, fan-out uses 0.10 mm via-in-pad with 0.5 mm drill on a 1.6 mm finished board. Microchip's AN-10319 recommends matched-length (50 ohms ±10%) DDR2 traces with the length-matching tolerance held within ±0.5 mm to achieve error-free operation at 133 MHz. Bypass per supply pin: 100 nF X7R plus one 4.7 µF X5R per VDDCORE ball; one bulk 47 µF tantalum within 25 mm of the package.
At active power <200 mW the SAMA5D3 die does not require a heatsink, but the 324-LFBGA thermal pad must be soldered to a 10x10 mm copper land on the top layer with 9 thermal vias (0.3 mm drill, 0.5 mm pitch) to the inner ground plane to keep junction rise below 15C at 85C ambient. In sealed enclosures without airflow, derate ambient to 70C and verify with a thermocouple on the BGA thermal ball. Industrial grade -40C to +85C is conservative for fanless HMI enclosures.
Do not power VDDCORE before VDDIOP - the SAMA5D3 requires power-rail sequencing per section 5 of the datasheet (Atmel-11121). Failure to follow the 1.2 V -> 1.8/3.3 V order can cause latch-up. The DDR2 controller needs termination resistors on the clock pair (DDR_CLKP/DDR_CLKN) and 22 ohm series resistors on the byte-lane data strobes - omitting these is the most common cause of DDR eye-diagram failures at first prototype. The 160 KB boot ROM is read-only; secure boot images must be signed with the SHA/AES engine public keys burned into the OTP area.
Place the SAMA5D3 BGA on the top side of the PCB with all decoupling within 5 mm of the supply pins. The 24-bit LCD controller outputs are routed on the inner signal layer adjacent to the ground plane (layer 2), keeping trace lengths under 75 mm to meet the 65 MHz pixel-clock rise/fall times. For Ethernet routing, isolate the GMII/RGMII signals with a guard ground trace and stitch ground vias every 25 mm. The two USB 2.0 high-speed differential pairs require 90 ohm differential impedance with length matching ±0.15 mm.
Compliance Information
RoHS/REACH compliant per Microchip SAMA5D3 product page. Not AEC-Q100 qualified - choose ATSAMA5D34A-CU automotive variant for vehicle applications. Halogen-free Green BGA package.
