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Memory and Storage

Self-Powered, 2-Pin Serial EEPROM Targets IoT, Battery, Consumable and Cable ID Markets

11 August 2015

Claiming it is the most innovative single-wire EEPROM with two pins, Atmel targets rapidly growing Internet of Things (IoT), wearables, consumable, battery and cable ID market segments. The self-powered device eliminates the need for a power source or Vcc pin, with a parasitic power scheme over the data pin. It also provides best-in-class ultra-low power standby of 700nA, 200uA for write current, and 80uA for read current at 25°C—a full one-third of the power required by leading competitors.

Space is always an issue and Atmel's AT21CS01/11 devices eliminate external capacitors and rectifiers with its parasitic power scheme over a single data pin. The devices feature ultra-high write endurance capability to allow more than one million cycles for each memory location to meet the requirements for the current high-write endurance applications.

The AT21CS01/11 products include a simple product identification with a plug-and-play 64-bit unique serial number in every device. Thus, making the device ideal for smart, connected devices in the current IoT world including wearables such as smart fitness bands and healthcare devices. They also deliver industry-leading electrostatic discharge (ESD) rating (IEC 61000-4-2 Level 4 ESD Compliant), so applications such as cables and consumables can tolerate exposure to the outside environment or direct human contact while still delivering flawless performance.

According to Padam Singh, director of marketing, memory products, Atmel, "Our new Single-Wire EEPROM family makes it very convenient to add serial EEPROM using just one-pin from the MCU/MPU without the need to route the Vcc to the device, delivering significant board space savings while simplifying the layout. In addition, the plug-and-play 64-bit serial number is the easiest way to add identification to various accessories and consumables. We look forward to proliferating these products to next-generation applications and delivering more value-added solutions and industry-firsts."

The new devices follow the I2C protocol, allowing for an easy migration from existing EEPROM with less overhead and capability to connect up to eight devices on the same bus. The AT21CS01 devices offer a security register with a 64-bit factory programmed serial number and an extra 16-bytes of user programmable and permanently lockable storage, delivering a guaranteed unique serial number for inventory tracking, asset tagging and can permanently protect the data if needed.

Atmel's AT21CS01 targets low-voltage applications operating at 1.7V- 3.6V. For applications that require higher voltage ranges such as Li-ion/polymer batteries, the AT21CS11 supports a 2.7V- 4.5V operating range and meets IEEE1725 specifications for electronic identification of battery packs.

The AT21CS01 devices are available now in production quantities in 3-lead SOT23, 8-lead SOIC and 4-ball WLCSP. Pricing starts at $0.32 in 5,000-piece quantities. The AT21CS11 will be available in Q4, 2015.

Related Links

Atmel AT21CS01

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