ATECC608B-MAHCZ-S - ECC Secure Element SWI UDFN-8 | Microchip
Teilenummer: ATECC608B-MAHCZ-S ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $1.17 | $1,17 |
| 10 | $1.08 | $10,80 |
| 100 | $0.95 | $95,00 |
| 500 | $0.84 | $420,00 |
| 1.000 | $0.76 | $760,00 |
| 3.000 | $0.69 | $2.070,00 |
ATECC608B-MAHCZ-S Übersicht
A secure element is a dedicated cryptographic co-processor that stores secret keys in tamper-resistant hardware, isolated from the main MCU or MPU. Within the power management and system-security hierarchy, it sits alongside microcontrollers and interface ICs, offloading asymmetric cryptography, secure boot validation, and anti-cloning duties that would otherwise expose keys in software. The ATECC608B belongs to Microchip's CryptoAuthentication family, which spans the ATECC508A, ATECC608A, and ATECC608B generations.
Key features include NIST-standard P-256 elliptic-curve support for ECDSA sign/verify and ECDH key agreement, hardware SHA-256 hashing and HMAC, up to 16 configurable key storage slots, and an EUI-48/EUI-64 based serial number for device identity. The MAHCZ suffix denotes the SWI (single-wire) communication interface, requiring only a single GPIO pin over a wide voltage range.
Technical depth: the device consumes extremely low power, making it well suited to battery-powered IoT endpoints. Its secure hardware key storage prevents key extraction even under sophisticated physical attacks. The ATECC608B provides security enhancements over the ATECC608A while remaining fully backwards compatible in commands, packages, and pinout, per Microchip's migration application note DS40002237A.
Typical applications include IoT network endpoint authentication, secure boot firmware validation, anti-cloning protection for consumables and peripherals, and TLS client certificate storage for cloud connectivity in smart-home and industrial devices.
Design consideration: choose the MAHCZ (SWI) variant only when a single-GPIO bus is required; the MAHDA variant supports standard I2C up to 1 Mbps. Reserve a GPIO on your MCU for SWI communication and plan provisioning during manufacturing.
This page synthesizes distributor pricing, drop-in alternatives, pinout, and practical design notes not found in the manufacturer datasheet, providing unique cross-reference value for engineers and buyers.
Drop-in-Alternativen für ATECC608B-MAHCZ-S – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
ATECC608A-MAHCZ-S
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
ATECC608B-MAHHL-S
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ATECC608B-MAHDA-S
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ATECC608B-MAVDA-S
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ATECC608B-TNGTLS
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
ATECC608B-MAHCZ-S Technische Daten
| Product Type | Cryptographic Authentication IC (Secure Element) |
| Crypto Family | CryptoAuthentication ATECC608B (TrustCUSTOM) |
| Cryptographic Algorithms | ECDSA, ECDH, SHA-256, HMAC, AES (verify only) |
| Elliptic Curve | NIST P-256 (ECC 256-bit) |
| Communication Interface | Single-Wire Interface (SWI) |
| Key Storage Slots | 16 slots, hardware-protected |
| Gehäuse | 8-UDFN (2x3 mm) |
| Montageart | Surface Mount |
| Serial Number | EUI-48 / EUI-64 based unique serial number |
| Power Consumption | Extremely low power (per Microchip product page) |
| Pre-Provisioning | TrustCUSTOM - fully customizable configuration |
| Compatibility | Pin-to-pin and command compatible with ATECC608A |
| Reel Size | Small 3K reel (per Mouser listing) |
| Application Linux Support | PKCS#11 interface via Trust Platform (per Microchip) |
ATECC608B-MAHCZ-S Pin-Konfiguration
| Pin 1 | NC — Not connected (per datasheet) |
| Pin 2 | GND — Ground reference |
| Pin 3 | VCC — Power supply input |
| Pin 4 | NC — Not connected (per datasheet) |
| Pin 5 | SWI — Single-Wire Interface data pin (MAHCZ variant; shared with SDA pad position on I2C variants) |
| Pin 6 | NC — Not connected (per datasheet) |
| Pin 7 | NC — Not connected (per datasheet) |
| Pin 8 | NC — Not connected (per datasheet) |
Typische Anwendungen
ATECC608B-MAHCZ-S ist geeignet für 6 Anwendungs: IoT Endpoint Authentication, Secure Boot Validation, Anti-Cloning for Consumables and Peripherals, TLS Client Certificate Storage for Cloud Connectivity, Smart Home and Connected Appliances, Industrial Automation Security.
IoT Endpoint Authentication
The ATECC608B-MAHCZ-S fits IoT endpoint authentication because its hardware-protected key storage and P-256 ECDSA engine let a resource-constrained MCU prove device identity to a cloud service without ever exposing the private key. The SWI interface requires only a single GPIO, which matters on pin-limited sensor nodes, and extremely low power consumption preserves multi-year battery life targets. In a typical design the device stores the client TLS certificate and key, signs server challenges during mutual TLS handshakes, and provides a unique serial number for device inventory. Unlike software-only crypto, the secure element resists key extraction from compromised firmware.
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Secure Boot Validation
For secure boot, the ATECC608B-MAHCZ-S anchors root-of-trust in tamper-resistant hardware: it verifies an ECDSA signature over the firmware image (P-256) before the MCU executes application code. The MAHCZ SWI variant lets designers place the secure element on a dedicated single-wire bus, isolated from the main I2C bus to reduce attack surface during early boot. Because the verification private key lives only inside the secure element, a cloned or tampered device cannot forge valid boot signatures. The CryptoAuthLib library provides ready-made secure-boot reference implementations, shortening development cycles. Boot-time verification adds only milliseconds of latency with typical firmware image sizes.
Empfohlen
Anti-Cloning for Consumables and Peripherals
Anti-cloning protection is a natural fit: the ATECC608B-MAHCZ-S is placed on a consumable (ink cartridge, battery pack, medical sensor, accessory) and performs an ECDSA challenge-response with the host device before operation is permitted. Cloners can copy serial numbers but cannot copy the hardware-protected private key, so counterfeit consumables fail authentication. The extremely low power draw suits battery-powered consumables that must retain identity for years, and the tiny 2x3 mm UDFN-8 package fits space-constrained accessories. The fully customizable TrustCUSTOM configuration lets OEMs define their own key hierarchies and slot policies rather than adopting a pre-provisioned cloud scheme.
Empfohlen
TLS Client Certificate Storage for Cloud Connectivity
For devices connecting to AWS IoT, Azure IoT, or Google Cloud IoT, the ATECC608B-MAHCZ-S offloads TLS client authentication: the MCU requests an ECDSA signature over the TLS handshake hash, and the secure element signs it using the stored device certificate's private key. This is the classic hardware-rooted mutual-TLS pattern. On Linux gateways, Microchip's Trust Platform exposes the device through PKCS#11, so standard TLS stacks consume it transparently. The SWI interface avoids bus contention with other I2C peripherals, and low quiescent power suits always-on connected devices. Microchip provides code examples for the Linux PKCS#11 integration path per the product page.
Empfohlen
Smart Home and Connected Appliances
Smart-home products benefit from the ATECC608B-MAHCZ-S's combination of a tiny 2x3 mm footprint, single-GPIO SWI connectivity, and wide-voltage single-pin operation - attributes Microchip highlights as ideal for longer battery life and flexible form factors. Typical roles include Matter/thread device identity, cloud onboarding certificates, and firmware integrity checking in thermostats, locks, and appliances. The hardware SHA-256 and HMAC engines accelerate challenge-response protocols used in commissioning flows. Because the same UDFN-8 footprint hosts I2C variants (MAHDA), one PCB can be populated with either interface version depending on the host SoC's available buses, easing platform consolidation across product lines.
Empfohlen
Industrial Automation Security
Industrial automation nodes - PLC remotes, motor-drive accessories, and IIoT sensors - use the ATECC608B-MAHCZ-S for device-level identity, secure firmware updates in the field, and protection against unauthorized spare-part substitution. The secure element's hardware key storage meets the growing requirement for cryptographic device identity in industrial networks without burdening the main controller's CPU with public-key math. The SWI single-wire interface simplifies retrofit onto legacy boards where no spare I2C lanes exist, and robust operation across industrial temperature conditions supports factory-floor environments. PKCS#11 Linux support extends coverage to industrial edge gateways running embedded Linux distributions.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für ATECC608B-MAHCZ-S – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | ATECC608A-MAHCZ-S | ATECC608B-MAHHL-S | ATECC608B-MAHDA-S | ATECC608B-MAVDA-S | ATECC608B-TNGTLS |
|---|---|---|---|---|---|---|
| Package | UDFN-8 (2x3 mm) | UDFN-8 (2x3 mm) - same | UDFN-8 (2x3 mm) - same | UDFN-8 (2x3 mm) - same | UDFN-8 (2x3 mm) - same | UDFN-8 (2x3 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Communication Interface | SWI (Single-Wire) | SWI (Single-Wire) | SWI (Single-Wire) | I2C up to 1 Mbps | I2C | I2C |
| Cryptographic Algorithms | ECDSA/ECDH P-256, SHA-256, HMAC | ECDSA/ECDH P-256, SHA-256, HMAC | ECDSA/ECDH P-256, SHA-256, HMAC | ECDSA/ECDH P-256, SHA-256, HMAC | ECDSA/ECDH P-256, SHA-256, HMAC | ECDSA/ECDH P-256, SHA-256, HMAC |
| Key Storage Slots | 16 hardware-protected slots | 16 hardware-protected slots | 16 hardware-protected slots | 16 hardware-protected slots | 16 hardware-protected slots | 16 slots (pre-provisioned) |
| Provisioning Model | TrustCUSTOM (fully customizable) | Custom (user provisioning) | Custom (user provisioning) | Custom (user provisioning) | Custom (user provisioning) | Trust&GO (factory pre-provisioned) |
| Generation / Security Level | ATECC608B (enhanced security) | ATECC608A (previous generation) | ATECC608B (enhanced security) | ATECC608B (enhanced security) | ATECC608B (enhanced security) | ATECC608B (enhanced security) |
| Compatibility with ATECC608A | Fully backwards compatible | Native device | Yes | Yes (command level) | Yes (command level) | Yes, but pre-provisioned slots |
Wichtigste Unterscheidungsmerkmale
- Single-GPIO SWI connectivity (vs. ATECC608B-MAHDA-S)
- Latest-generation security enhancements (vs. ATECC608A-MAHCZ-S)
- Fully custom provisioning flexibility (vs. ATECC608B-TNGTLS)
- Trade-off: SWI tooling ecosystem (vs. ATECC608B-MAHDA-S)
Designhinweise
The 8-UDFN 2x3 mm package exposes a die-attach pad on the underside; connect it to the ground plane with an array of vias for mechanical reliability and thermal dissipation. Keep the SWI trace short (under 10 cm recommended) and add a pull-up resistor per Microchip's CryptoAuthentication application guidance - SWI uses a single-wire protocol sensitive to line capacitance. Land pattern must match the ATECC608A/608B family footprint so I2C and SWI variants remain interchangeable on the same board.
The ATECC608B-MAHCZ-S is designed for extremely low power consumption per Microchip's product page, but verify the supply voltage range and sleep/active current figures against the full (NDA) datasheet before finalizing the power budget for coin-cell designs. Estimated: in a battery IoT node sleeping 99% of the time at microamp-level sleep current, the secure element's contribution to annual battery drain is negligible compared to the MCU radio, but wake-up frequency during TLS handshakes should be minimized.
Interface selection is a suffix-level decision: MAHCZ is SWI-only and cannot be driven by a standard I2C controller - do not substitute MAHDA for MAHCZ (or vice versa) without changing host firmware drivers. Plan provisioning during manufacturing: TrustCUSTOM parts ship blank, so you need a key-injection step (Microchip Trust Platform tools or your own HSM-based flow). Use CryptoAuthLib on the host to avoid re-implementing the SWI protocol and command layer. Always buy a few configuration-compatible spare units, as fused configuration zones cannot be reprogrammed after locking.
SWI is a single-pin bidirectional protocol with wake and data tokens timing-sensitive; avoid routing it parallel to high-edge-rate clock or switching-regulator nodes, and keep it away from noisy inductor areas of DC-DC converters. A weak pull-up (value per the datasheet I/O specification) on the SWI line defines the idle-high state. On shared headers or connectors, protect the SWI pin with the same ESD strategy applied to other external interfaces. For I2C variants, use 1-10 kΩ pull-ups depending on bus speed and capacitance.
Compliance-Informationen
Compliance status was not stated in the provided verified web data; Microchip standard product pages typically list RoHS status but this must be confirmed from the manufacturer product page before claiming compliance.
