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OTP EPROM

A long-time market leader in EPROM technology, Microchip offers 5V, 3V and Battery-Voltage™ (2.7V) EPROMs for a variety of applications. Microchip has one of the broadest ranges 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 and PLCC. The devices are widely used for embedded program code storage in applications such as: cordless phones, video game players, printers, graphics cards, instrumentation, automotive, medical devices, telecommunications, networking, industrial control equipment, and hard disk drives.

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Key Features

  • Lower power — Microchip’s 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.
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 256-K (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 (1Mb x 8) OTP EPROM
AT27C1024 1-Mb (64K x 16) OTP EPROM
AT27C2048 2-Mb (128K x 16) OTP EPROM
AT27C256R 256-K (32K x 8) OTP EPROM
AT27C4096 4-Mb (256K x 16) OTP EPROM
AT27C512R 512-K (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 256-K (32K x 8) Low-Voltage OTP EPROM
AT27LV512A 512-K (64K x 8) Low-Voltage OTP EPROM
Tabs / Memory
Memory Product Comparison

Memory Product Comparison

  Serial
EEPROM
Parallel
EEPROM
OTP
EPROM
Serial
Flash
Parallel
Flash
Serial
SRAM
Serial
NVSRAM
Serial
EERAM
Clock Frequency 0.4 - 20 MHz 70 ns 45 ns 20 - 104 MHz 45 - 70 ns 16 - 20 MHz 16 - 20 MHz 1 MHz
Cost/Bit High High High Low Low Medium Medium Low
Read Times Medium Fast Fast Medium Fast Medium Medium Medium
Write Times Medium Fast NA Medium Fast Instantaneous Instantaneous Instantaneous
Pin Count 8 pins 28 and 32 pins 28+ pins 8 pins 32 and 48 pins 8 pins 8 pins 8 pins
Data Retention 200+ Years 10
Years
10
Years
100+ Years 100+ Years Volatile 20+ Years(with battery) 200+ Years
Typ. Standby Current 1 µA 200 µA 100 µA ~15 µA ~30 µA ~4 µA ~4 µA ~40 µA
Voltage 1.7 V - 5.5V 2.7V, 5V 2.7V, 5V 1.65V - 1.95V, 2.7V - 3.6V, 2.3V - 3.6V 1.65V - 1.95V, 2.7V - 3.6V, 4.5V - 5.5V 1.65V - 1.95V, 2.5V - 5.5V 2.5V - 5.5V 2.7V - 3.6V, 4.5V - 5.5V
Temperature -40°C to +125°C -55°C to +125°C -55°C to +125°C -40°C to +105°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C

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