EM4378
The best 3D LF/UHF communication module redefining key fob innovation: multi-protocol, multi-frequency, secure communication and a high-speed CPU for ultimate performance and easy integration.
Fast, Secure & Flexible for Next-Gen Apps
The EM4378 sets a new standard for key fob innovation. Combining multi-protocol and multi-frequency support with secure communication and a high-speed RISC-V CPU, it delivers faster response times and advanced processing power. Designed for effortless integration, the EM4378 is the perfect choice for next-generation automotive and wearable applications.
Key Features
Multi-Protocol & Multi-Frequency Support • Advanced Security Architecture • High-Speed RISC-V CPU • Easy Integration & Development
EM4378 addresses key fob vulnerabilities with AES-128/256 encryption and TRNG, protecting against relay attacks, signal amplification, and weak legacy systems. Plus, SPI interface enables external UWB for precise localization, ensuring ultimate safety and flexibility.
EM4378 solves connectivity challenges with multi-frequency support and advanced RF design to reduce interference. Optimized power management minimizes battery dependency, while extended range and RSSI-based distance estimation ensure seamless, reliable performance.
EM4378’s 3D LF receiver and transponder operate on X, Y, and Z axes simultaneously, with all channels continuously listening. This design minimizes missed signals caused by movement or misalignment, ensuring reliable auto-lock/unlock and a smooth user experience.
Technical Features
- 3D LF wake-up receiver @ 125 kHz
- High sensitivity (down to 300uVp)
- Low power consumption (8.0uA on 3 channels)
- UHF Transmitter (315/434/868/915 MHz)
- AES-128/256 encryption, SHA1/256, TRNG
- RISC-V 32-bit CPU @ 12 MHz with 128 KiB flash
- ISO14223 and EM protocol support
- On-chip 3D antenna tuning
- AEC-Q100 Grade 3 automotive qualification
Technical Resources
Ready to explore the EM4378 advantage? Download the full factsheet now and discover how to boost security, connectivity, and user experience.
Application Areas
- Remote Keyless Entry (RKE)
- Passive Keyless Entry (PKE)
- Passive Keyless Go (PKG)
- Immobilizer Deactivation
- Door Access Control
- Wearables & Smartwatch
FAQ
Q: What is EM4378 Keyfob used for?
A: It enables secure automotive access and IoT connectivity.
Q: Does EM4378 support multiple protocols?
A: Yes, PKG, PKE, RKE, BLE, NFC, and UWB.
Q: Is EM4378 suitable for smart buildings?
A: Absolutely, it integrates BLE and NFC for modern access control.
Q: What security features does EM4378 offer?
A: AES-128/256, SHA, TRNG, and OTP flags.
Q: Can EM4378 be used in wearables?
A: Yes, its compact design and low power make it ideal for wearables.
Q: Does EM4378 meet automotive standards?
A: Yes, it complies with AEC-Q100 Grade 3.
Q: What is the power consumption in Rx mode?
A: Only 8 µA in low-power mode with 3 channels active.
Q: Does EM4378 support UHF auto-tuning?
A: Yes, before each transmission for optimal performance.
Q: Are development tools available?
A: Yes, DVK and SDK are provided for evaluation.
Q: When is mass production planned?
A: End of Q2 2026 after qualification in Q1 2026.
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