MIAXIS SM-66H2 is an integrated capacitive fingerprint module developed by Miaxis Biometrics, combining a semiconductor fingerprint sensor, a high-performance ARM processor, and FLASH memory.
OVERVIEW
MIAXIS SM-66H2 is an integrated capacitive fingerprint module developed by Miaxis Biometrics, combining a semiconductor fingerprint sensor, a high-performance ARM processor, and FLASH memory.
It supports full fingerprint processing functions including image capture, feature extraction, template matching (1:1 / 1:N), and on-device storage, making it ideal for embedded biometric authentication systems.
With its compact design, ultra-low power consumption, and high adaptability, the SM-66H2 is widely used in portable terminals, IoT devices, smart locks, and access control systems requiring efficient, secure, and reliable fingerprint verification.
FEATURES
Certificates:
Compliant with ISO/IEC 19794-2 & ANSI 378 biometric standards
High Image Quality
Capacitive fingerprint sensing technology ensuring clear and accurate image capture
Compact Design
Integrated module design with 18.3mm diameter and 7.8mm thickness
Strong Adaption
Self-adaptive parameter adjustment for dry and wet fingers
Excellent tolerance to deformed or low-quality fingerprints
Easy Integration
UART communication interface for flexible system integrationUART&USB multiple interfaces
Simple command set for fast application development
Advanced Algorithm
Embedded Miaxis SM6-series fingerprint algorithm for image processing, extraction, and matching
Supports 1:1 verification and 1:N identification
Adjustable security levels for various working environments
SM-66H2 Specifications
| Parameter | Detail |
| Module Size | Ø18.3 mm × 7.8 mm |
| Sensor Type | Capacitive Sensor |
| Active Platen Area | 9.6 × 9.6 mm |
| Image Size | 192 × 192 pixels |
| Image Resolution | 508 dpi |
| Grey Scale | 8-bit |
| Power-On Time | ≤0.2 s (recommended 0.22 s) |
| Enrollment Time | ≤0.3 s |
| Verification Time (1:1) | ≤0.6 s (extraction + match) |
| Identification Time (1:N) | ≤1 s (N=100) |
| FAR / FRR | FAR ≤0.001%, FRR ≤1.0% (Security Level 3) |
| Template Size | 512 bytes |
| Fingerprint Capacity | 100 templates |
| ESD Immunity | ±8kV (contact), ±15kV (air) |
| Supply Voltage | VDD_CTRL: DC 3.3V ± 0.3V; Vtouch: DC 3.3V ± 0.3V |
| Current (Work / Sleep) | ≤30 mA / ≤10 µA (typical 5 µA) |
| Communication Interface | UART |
| Baud Rate Options | 9600 / 19200 / 38400 / 57600 / 115200 (default) |
| Operating Temperature | -20°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Operating Humidity | 20%RH–90%RH, non-condensing |
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