Microchip offers Serial EEPROM devices in I2C, Microwire and SPI compatible protocols. The devices come in a number of industry-standard package types including space saving DFN, VFBGA, SOT23, and WLCSP packages. Microchip Serial EEPROM devices feature low pin count and are optimized for use in automotive and industrial temperature applications where low-power and low-voltage operation are essential.


Key Features:

  • Broad portfolio — Serial EEPROM devices are offered in 1-Kbit to 2-Mbit densities in I2C, Microwire, and SPI compatible protocols available in voltages from 1.7V to 5.5V
  • Diverse packages options — The Serial EEPROM devices come in industry standard PDIP, SOIC, and TSSOP package types, as well as space saving DFN, VFBGA, SOT23, and WLCSP packages
  • High performance — Microchip Serial EEPROM devices offer low active and standby currents and operate at fast clock frequencies
  • Automotive designs — Microchip offers automotive-qualified Serial EEPROM devices in environmentally friendly "green" versions designed to withstand broad extended temperature ranges
  • Customer resources — Application notes, software drivers, IBIS and Verilog models available to aid customer's application development

The following serial EEPROM product ranges are available:

  • AT24Cxxx
  • AT24HCxxx
  • AT24MACxxx
  • AT25xxx
  • AT34xxx
  • AT93xxx

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Parallel EEPROM

Parallel EEPROM enables stored data to be updated byte-by-byte or by full sector, providing design flexibility. The parallel interface devices offer high-programming endurance and data retention, as well as faster read times than serial Interface protocols. Microchip provides a complete selection of densities (64-Kbit to 4-Mbit), operating voltages, and device packages. Microchip's Battery Voltage™ (2.7V), low voltage (3V), and 5V devices are used extensively across a broad spectrum of products, including telecommunications, avionics, and military applications.


Key Features:

  • Save on components — The devices are accessed like a static RAM for the read or write cycle, without the need for external components
  • Monolithic EEPROM — Microchip offers the only 4-Mbit monolithic parallel EEPROM (AT28C010) for use in military and commercial avionics applications
  • Extra features — The devices offer extra features that include internal error correction, an optional software data protection mechanism, and space for device identification

The Following parallel EEPROM product ranges are available:

  • AT28BV
  • AT28C
  • AT28HC
  • AT28LV

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Microchip offers 5V, 3V and Battery-Voltage™ (2.7V) EPROMs for a variety of applications. Microchip has one of the broadest range of one-time programmable (OTP) EPROMs, with densities ranging from 256-Kbits to 8-Mbits, speeds as fast as 45ns, and package options that including PDIP, PLCC, SOIC, TSOP, and TSSOP. The devices are widely used for embedded program code storage in applications such as: cordless phones, pagers, video game players, printers, modems, graphics cards, instrumentation, automotive, medical devices, telecommunications, networking, industrial control equipment, and hard disk drives.


Key Features:

  • Lower power — The Microchip innovative design techniques provide fast speeds that rival 5V devices while retaining the low power consumption of a 3V power supply
  • Standard packages — The devices are available in industry-standard JEDEC-approved OTP plastic PLCC, TSOP, and VSOP packages
  • Two-line control — All devices feature two-line control (CE, OE) to give designers the flexibility to prevent bus contention
  • Additional features — The AT27Cxxx and AT27LVxxx series both have additional features to ensure high quality and efficient product use, including Rapid Programming Algorithm and Integrated Product Identification Code

The following OTP EPROM product ranges are available:

  • AT27BV
  • AT27C
  • AT27LV

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