Mfr Part #:

AT27C256R

Mfr Name: N-A

The AT27C256R is a 262,144 bit one-time programmable read-only memory (OTP EPROM) organized as 32K by 8 bits. It features a fast 45 ns read access time and low power CMOS operation.

✓ Total Stock: 12 pcs

$ Price Range: $1.50

AT27C256R Available from 1 distributor

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
ACK ELEKTRONIK ✓ Non-Authorised Inventory information	12 pcs On Request	12 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

AT27C256R Specifications Quick View

Most important parameters for selection – full specs in datasheet.

SELECT ALL

Category	New Products
Manufacturer Name	N-A

View Similar Products (0)

AT27C256R Description

Short technical summary and product information.

The AT27C256R is a high-performance, low-power 262,144-bit one-time programmable read-only memory (OTP EPROM) from N-A, organized as 32K x 8 bits. It operates from a single 5V ±10% power supply and offers a fast read access time of 45 ns, eliminating the need for wait states in many microprocessor systems.

Utilizing Atmel’s scaled CMOS technology, the AT27C256R provides low active power consumption, typically 20 mA at 5 MHz, and minimal standby power, less than 100 μA. It supports a rapid programming algorithm with a typical programming time of 100 μs per byte.

This EPROM is available in industry-standard JEDEC-approved packages including 28-lead PDIP, 32-lead PLCC, and 28-lead TSOP and SOIC. It features two-line control (CE, OE) for flexibility in bus contention management. The device also includes 2,000V ESD protection and 200 mA latchup immunity, ensuring high reliability.

The AT27C256R is suitable for applications requiring reliable firmware storage and access without the delays associated with mass storage media. It operates across commercial and industrial temperature ranges.

AT27C256R Quick Information

Product Type: OTP EPROM Memory

Canonical Name: AT27C256R 262144-bit OTP EPROM Memory

Subcategory: EPROM

AT27C256R Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

AT27C256R Estimated Pricing

Qty	Low	High
1+	$1.50	$1.50

Estimated market price range - modelled values for guidance only, not live distributor offers.

AT27C256R Features

262,144 bit OTP EPROM memory
Fast 45 ns read access time
Low power CMOS operation
Single 5V supply voltage
Available in multiple JEDEC packages

AT27C256R Applications

Used in embedded system data storage
Suitable for non-volatile memory applications
Ideal for programmable logic devices
Applicable in industrial control systems

AT27C256R FAQs

6 frequently asked questions generated from this part’s specifications.

What is the memory organization of the AT27C256R?

The AT27C256R is organized as 32K by 8 bits.

What is the maximum read access time for the AT27C256R?

The maximum read access time for the AT27C256R is 45 ns.

What is the operating supply voltage for the AT27C256R?

The AT27C256R requires a single 5V ±10% supply voltage for normal read mode operation.

What are the typical power consumption levels for the AT27C256R?

In active mode, power consumption is typically 20 mA at 5 MHz, and in standby mode, it is less than 100 μA.

What programming algorithm does the AT27C256R use?

The AT27C256R uses the Rapid Programming Algorithm, with a typical programming time of 100 μs per byte.

What package types are available for the AT27C256R?

The AT27C256R is available in JEDEC standard 28-lead PDIP, 32-lead PLCC, and 28-lead TSOP and SOIC packages.