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OTP EPROM

One-Time Programmable (OTP) EPROMs, widely used for storing embedded program code in a vast array of applications are available in densities from 256 Kbit to 8 Mbit. These 5V, 3V and 2.7V battery-voltage OTP EPROMs are dependable, long-lasting solutions. We will continue to support these legacy components for years to come, empowering you to use them with confidence in both new and existing designs eliminating the risk of costly forced redesign.

Why Design with Our One-Time Programmable EPROMs?


  • Density range and speed: 256 Kbits to 8 Mbits, speeds as fast as 45 ns
  • Lower power: Our innovative design techniques provide fast speeds that rival 5V devices while retaining the low power consumption of a 3V power supply
  • 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

One-Time Programmable EPROM Devices


Device Description
AT27BV010 1 Mb (128K x 8) Unregulated Battery-Voltage OTP EPROM
AT27BV1024 1 Mb (64K x 16) Unregulated Battery-Voltage High-Speed OTP EPROM
AT27BV256 256K (32K x 8) Unregulated Battery-Voltage High-Speed OTP EPROM
AT27C010 1 Mb (128K x 8) OTP EPROM
AT27C020 2 MB (256K x 8) OTP EPROM
AT27C040 4 Mb (512K x 8) OTP EPROM
AT27C080 8 Mb (1 Mb x 8) OTP EPROM
AT27C1024 1 Mb (64K x 16) OTP EPROM
AT27C2048 2 Mb (128K x 16) OTP EPROM
AT27C256R 256K (32K x 8) OTP EPROM
AT27C4096 4 Mb (256K x 16) OTP EPROM
AT27C512R 512K (64K x 8) OTP EPROM
AT27LV010A 1 Mb (128K x 8) Low-Voltage OTP EPROM
AT27LV020A 2 Mb (256K x 8) Low-Voltage OTP EPROM
AT27LV040A 4 Mb (512K x 8) Low-Voltage OTP EPROM
AT27LV256A 256K (32K x 8) Low-Voltage OTP EPROM
AT27LV512A 512K (64K x 8) Low-Voltage OTP EPROM