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Longevity, dependability and steady are all words which aptly apply to the our supply of 5V, 3V and battery-voltage 2.7V One-Time Programmable (OTP) EPROMs, widely used for embedded program code storage in a vast array of applications. We will continue to support these legacy components for years to come, enabling you to use them in new and existing designs and removing the risk of forced redesign.

Why Design with Our OTP 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 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

Memory Product Comparison


  Serial
EEPROM
Parallel
EEPROM
OTP
EPROM
Serial
Flash
Parallel
Flash
Serial
SRAM
Serial
NVSRAM
Serial
EERAM
  Explore Products Explore Products Explore Products Explore Products Explore Products Explore Products  Explore Products Explore Products
Density 128 bit - 4 Mb 64 Kb - 1 Mb 256 Kb - 8 Mb 512 Kb - 64 Mb 1 - 64 Mb 64 Kb - 1 Mb 512 Kb - 1 Mb 4 Kb - 1 Mb
Clock Frequency 0.4 - 20 MHz 70 ns 45 ns 20 - 104 MHz 55-70 ns 16 - 20 MHz 16 - 20 MHz 1 - 66 MHz
Cost/Bit High High High Low Low Medium Medium Medium
Read Times Medium Fast Fast Medium Fast Medium Medium Medium
Write Times Medium Fast N/A Medium Fast Instantaneous Instantaneous Instantaneous
Pin Count 2 to 8 pins 28 and 32 pins 28 to 44 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)
100+ 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 -55°C to +150°C 1 -55°C to +125°C -40°C to +85°C -40°C to +125°C 1 -40°C to +85°C -40°C to +125°C -40°C to +85°C -40°C to +125°C 1

1. Selected densities