Ultra-Low Power ICs — Semiconductor brand of the Swatch Group
EM Microelectronics is a semiconductor subsidiary of the Swatch Group of Switzerland, specializing in ultra-low power CMOS IC design and manufacturing. Product lines include ultra-low power MCUs, NFC/RFID ICs, LCD driver ICs, energy harvesting ICs, and sensor ICs. Widely used in smart watches, wearables, smart cards, IoT sensor nodes, and medical devices.
Official Website| Part Number | Description | Package |
|---|---|---|
| EM4126 | EM4126 UHF RFID Tag IC (EPC Gen2) | Passive UHF RFID tag IC |
| EM4205 | EM4205 125kHz Read/Write RFID Tag IC | — |
| EM9304 | EM9304 Bluetooth 4.2 Low-Energy SoC / Co-Processor | WLCSP-25, QFN-28 |
| EM4124 | EM4124 UHF RAIN RFID (EPC Gen2) IC | — |
| EM4325 | EM4325 UHF RFID + Sensor IC (EPC Gen2 / BAP) | — |
| EM4569 | EM4569 125kHz LF Read/Write Transponder (Animal ID) | Read/write transponder |
| EM4150 | EM4150 125kHz LF Read/Write RFID IC | LF passive, read/write |
| EM4200 | EM4200 125kHz Read-Only RFID Tag IC (EM4100-Compatible) | Read-only LF transponder |
| EM4100 | EM4100 125kHz Read-Only RFID Tag IC | Read-only LF RFID tag |
| EM4095 | EM4095 125kHz RFID Reader Front-End IC | SO16 |
| EM6819 | EM6819 Ultra-Low Power 8-bit MCU | QFN, DIP, TSSOP |
| EM9301 | EM9301 BLE 4.0 Single-Mode Controller | QFN32 |
| EM4233 | EM4233 13.56MHz ISO 15693 High-Secure RFID IC | — |
| EM4305 | EM4305 125kHz Read/Write RFID Transponder | TSSOP8, SOT23 |
| EM4425 | EM4425 (em|echo-V) NFC + UHF Dual-Frequency RFID IC | Dual-Frequency RFID (NFC+UHF) |
| EM4423 | EM4423 (em|echo) NFC + UHF Dual-Frequency RFID IC | Dual-Frequency RFID (NFC+UHF) |
| EM8500 | EM8500 Ultra-Low Power Energy-Harvesting PMIC | QFN24 (4×4mm) |
The EM4126 is a passive UHF RFID tag IC from EM Microelectronics compliant with ISO/IEC 18000-63 and EPC Class-1 Gen2, with 224-bit memory (16-bit PC + 208-bit EPC/UII), operating across the global 860~960MHz UHF band with ~−19dBm chip read sensitivity and EPC serialization (SGTIN) — for supply chain, retail item-level tagging, and asset management.
The EM4205 is a 125kHz LF read/write RFID transponder from EM Microelectronics with a 512-bit EEPROM (16 words × 32-bit), supporting Manchester/Bi-phase encoding and 8/16/32/64 RF-clocks-per-bit data rates, with 32-bit password read/write protection and a read-only lock, compliant with ISO 11784/11785. Fully passive — common in animal ID, access control, and immobilizers. The EM4305 is the same function with enlarged coil pads.
The EM9304 is an ultra-low-power Bluetooth 4.2 Low Energy IC from EM Microelectronics, usable as a standalone SoC or as a BLE companion/co-processor to any host MCU. It embeds a 32-bit processor (with FPU), 128KB OTP, 48KB RAM (up to 20KB retention), a BLE controller+host in ROM with OTA (FOTA) update, and up to 8 simultaneous connections. Rx −94dBm, Tx −34~+6.1dBm, in WLCSP-25 / QFN-28.
The EM4124 is a passive UHF RAIN RFID tag IC from EM Microelectronic, compliant with EPC Class-1 Gen2 / ISO 18000-6C, operating across the 860~960MHz global UHF band. It holds 176-bit non-volatile memory (16-bit PC + 96-bit EPC + 32-bit Kill password + 32-bit Access password) plus a 64-bit factory-locked unique TID, with about −19dBm chip read sensitivity and wideband parallel-inductance antenna matching — for retail item tagging, supply-chain logistics, asset tracking, animal ear tags, and anti-counterfeiting.
The EM4325 is a UHF RFID smart-sensor IC from EM Microelectronics compliant with EPC Class-1 Gen2 and ISO 18000-63, supporting battery-assisted passive (BAP) or fully passive operation, with an on-chip absolute temperature sensor, 4096-bit EEPROM, and a 4-bit GPIO/SPI interface to on-tag devices — for cold-chain temperature logging, sensor tags, and supply-chain telemetry.
The EM4569 is a 125kHz low-frequency (LF) read/write transponder IC from EM Microelectronic, with 512-bit EEPROM (16 words × 32-bit) and 32-bit password protection, compliant with ISO 11784/11785 (FDX-B) animal identification. It supports Manchester/Biphase/Miller/PSK/FSK encodings, has an on-chip resonant capacitor, and can be locked read-only. The EM4569 is the bumped enlarged-pad / extended-range variant of the EM4469, designed for direct coil bonding in animal tags, and also used in access control and logistics ID.
The EM4150 is a 125kHz low-frequency (LF) passive read/write identification IC from EM Microelectronic, with 1Kbit EEPROM (32 words × 32-bit) and 32-bit password protection, an on-chip rectifier and voltage limiter, operating across a 100~150kHz field. Unlike the read-only EM4100, the EM4150 is re-writable — for access control, asset and logistics tracking, closed-loop ticketing, and industrial ID, and it pairs with EM4095 reader front-ends.
The EM4200 is a 125kHz read-only LF RFID transponder from EM Microelectronics with 128-bit ROM, protocol-compatible with the EM4100/4102 (and EM4005/4105) as a drop-in replacement with better read range. Supports Manchester/Biphase/PSK modulation and RF/32, RF/64 data rates. Fully passive — common in access cards, animal ID, and asset tracking.
The EM4100 is EM Microelectronics' classic 125kHz read-only LF RFID tag IC with a 64-bit laser-programmed unique ID (not field-rewritable), supporting Manchester/Biphase/PSK coding and RF/64, RF/32, RF/16 data rates. Fully passive, with an on-chip 74pF resonance capacitor, rectifier, and voltage limiter — ubiquitous in access cards, key fobs, and asset ID.
The EM4095 is an EM Microelectronics 125kHz RFID reader/base-station analog front-end that directly drives the antenna and handles AM modulation/demodulation. An integrated PLL self-adapts to antenna resonance (no external quartz), connecting to an MCU via a simple interface (MOD / DEMOD_OUT / RDY_CLK), with a 4.1~5.5V supply in an SO16 package — common in access control, animal ID, and immobilizer applications.
The EM6819 is an ultra-low power 8-bit RISC microcontroller from EM Microelectronics. Built on CMOS process, it operates down to 0.9V and achieves nA-level sleep current. Features integrated LCD driver, timers, ADC, and rich peripherals — ideal for battery-powered consumer electronics and smart card applications.
The EM9301 is a single-mode Bluetooth 4.0 Low Energy (BLE) controller IC designed for ultra-low power applications. It communicates with the host MCU via SPI, integrates the RF front-end and baseband, and provides a complete BLE link layer — ideal for wearables, sensors, and beacons requiring extremely low operating current.
The EM4233 is a 13.56MHz HF passive RFID IC from EM Microelectronic, ISO/IEC 15693 compliant, with 2kbit (64 words × 32-bit) read/write EEPROM and a 64-bit unique ID (UID). A hardware crypto engine, true random number generator, and 96-bit secret key provide high security, with selectable 32-bit password or plain-memory modes and 60-year data retention — for anti-counterfeiting, access/ticketing, asset tracking, and secure smart labels.
EM4305 is a 125kHz low-frequency RFID read/write transponder IC powered by the inductive coil. Supports ASK/FSK/PSK modulation with 512-bit EEPROM — widely used in access control cards, employee ID cards, animal identification, and industrial tracking.
The EM4425 is a single-chip dual-frequency RFID tag IC from EM Microelectronics, integrating both HF (NFC, 13.56MHz) and UHF (RAIN/EPC Gen2v2, 860~960MHz) interfaces, with AES-128 encryption and digital signature support. One chip can be read both by smartphone NFC at close range and by UHF for long-range inventory — ideal for brand authentication and supply-chain traceability.
The EM4423 is a single-chip dual-frequency RFID tag IC from EM Microelectronics combining NFC (HF) and RAIN (UHF) — branded "RAINFC". The HF side is NFC Forum Type 2 compliant and the UHF side is EPC Gen2v2 compliant, with a 96-bit inalterable unique ID — widely used for retail item tagging, consumer engagement, and anti-counterfeiting.
The EM8500 is an energy-harvesting power-management IC from EM Microelectronics that draws power from µW–mW sources such as solar cells or thermoelectric generators (TEG). Its boost converter cold-starts from 300mV / ~3µW with embedded maximum-power-point tracking (MPPT), and provides 4 independently configurable outputs — the heart of battery-less or battery-extended IoT sensor nodes.
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