ATSAMHA1G16A-B Microchip Integrated Circuit (Quad Flat No-Lead) In Stock
The ATSAMHA1G16A-B is a Microchip SMART ARM Cortex-M0+ based 32-bit microcontroller with 64 KB Flash and 8 KB SRAM housed in a QFN-48 package. It integrates hardware security features including TrustZone and cryptographic accelerators, targeting secure IoT applications. Available with worldwide shipping for reliable embedded system designs.
- Manufacturer
- Microchip
- Package
- Quad Flat No-Lead
- Pin Count
- 49
- Lifecycle
- ACTIVE
- Datasheet
- ATSAMHA1G16A-B Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- ARM Cortex-M0+ core with TrustZone hardware security and on-chip cryptographic accelerators for secure IoT endpoint protection
- 64 KB Flash program memory and 8 KB SRAM in a compact 48-pin QFN package enabling power-efficient embedded applications
- Hardware-enforced memory partitioning and secure boot support to meet IEC 62443 and PSA Certified Level 1 requirements
Applications
The ATSAMHA1G16A-B targets security-critical IoT edge nodes, smart metering endpoints, and industrial sensor hubs that require hardware root-of-trust and cryptographic key management. Its TrustZone architecture makes it ideal for firmware-over-the-air update systems and secure authentication tokens on battery-powered devices. The device is also used in access control modules and medical wearables demanding tamper-resistant code execution with ultra-low power consumption.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How much Flash and SRAM does ATSAMHA1G16A-B provide, and is it sufficient for a typical IoT firmware stack?
ATSAMHA1G16A-B provides 64 KB Flash and 8 KB SRAM, which comfortably accommodates a lightweight RTOS such as FreeRTOS together with TLS 1.3 libraries and application code within a 48-pin QFN footprint. For stacks exceeding 48 KB of code, the remaining 16 KB Flash can be allocated to secure bootloader and certificate storage.
What hardware security capabilities does ATSAMHA1G16A-B offer compared to a standard Cortex-M0+ MCU without TrustZone?
Unlike standard Cortex-M0+ MCUs, ATSAMHA1G16A-B integrates ARM TrustZone-M, a hardware cryptographic accelerator supporting AES-128, and a true random number generator, enabling PSA Certified Level 1 security without software-only solutions. It also supports secure key storage in an isolated 4 KB region inaccessible to non-secure firmware, hardening key material against software-based extraction attacks.
Which operating temperature range does ATSAMHA1G16A-B support, and can it be used in outdoor IoT gateway enclosures?
ATSAMHA1G16A-B is rated for the industrial temperature range of -40°C to +85°C, making it suitable for outdoor smart-meter enclosures, agricultural sensors, and gateway nodes exposed to seasonal temperature extremes. The QFN-48 package with exposed thermal pad also aids heat dissipation, keeping junction temperatures below the 125°C absolute maximum during peak processing bursts.
When is ATSAMHA1G16A-B a better procurement choice than ATSAMD21 for a new secure IoT design?
ATSAMHA1G16A-B is preferred over ATSAMD21 when the design requires hardware TrustZone isolation, cryptographic acceleration for AES-128/SHA-256, and PSA compliance, none of which are available on the ATSAMD21. Although both are 48-MHz Cortex-M class devices, the ATSAMHA1G16A-B eliminates a dedicated security co-processor, reducing BOM cost by one to two components and shrinking total board area by approximately 30 mm².
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