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One-Time EPROM Devices Product Comparison

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OTP EPROM

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

View All OTP EPROMS

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