Mfr Part #:

AT27C256R-70PU

Mfr Name: MIC

The Microchip Technology AT27C256R-70PU is a 262,144-bit one-time programmable (OTP) EPROM. It features a fast 45ns read access time and operates from a single 5V supply.

✓ Total Stock: 49,000 pcs

$ Price Range: $1.28

AT27C256R-70PU Available from 1 distributor

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Optech Co.,Limited ✓ Non-Authorised Inventory information	49,000 pcs On Request	49000 pcs	On Request	1	On Request	On Request	22+	On Request	On Request

AT27C256R-70PU Specifications Quick View

Most important parameters for selection – full specs in datasheet.

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Category	New Products
Manufacturer Name	MIC
Access Time	45ns
ESD Protection	2,000V
Memory Size	262,144-bit
Operating Temperature Range	Industrial and automotive
Supply Voltage	5V ±10%

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AT27C256R-70PU Description

Short technical summary and product information.

The AT27C256R-70PU from Microchip Technology is a high-performance, low-power 262,144-bit one-time programmable (OTP) EPROM. Organized as 32K by 8 bits, it offers a rapid read access time of 45ns, eliminating the need for wait states in high-performance microprocessor systems.

This device operates from a single 5V ±10% supply and utilizes Atmel's scaled CMOS technology for low active power consumption, typically 8mA, and minimal standby power, less than 10µA. It includes features such as 2,000V ESD protection and 200mA latchup immunity for high reliability.

The AT27C256R-70PU supports a rapid programming algorithm, typically 100µs/byte, and is available in industry-standard JEDEC-approved PDIP and PLCC packages. It is suitable for applications requiring reliable firmware storage and access without the delays associated with mass storage media. The device also features industrial and automotive temperature ranges and a green (Pb/halide-free) packaging option.

Designed for flexibility, it includes two-line control (CE, OE) to prevent bus contention. The integrated product identification code aids in selecting proper programming algorithms and voltages by standard programming equipment.

AT27C256R-70PU Quick Information

Product Type: One-Time Programmable Read-Only Memory

Series: AT27C256R

Canonical Name: AT27C256R-70PU 262144-bit One-Time Programmable Read-Only Memory

Subcategory: One-Time Programmable (OTP)

AT27C256R-70PU Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

Lead Free: Green (Pb/halide-free) packaging option

AT27C256R-70PU Estimated Pricing

Qty	Low	High
1+	$1.28	$1.28

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

AT27C256R-70PU Features

Fast 45ns read access time.
Low-power CMOS operation.
Single 5V ±10% supply voltage.
High reliability CMOS technology.
Available in PDIP and PLCC packages.

AT27C256R-70PU Applications

Reliable firmware storage.
High-performance microprocessor systems.
Industrial applications.
Automotive applications.

AT27C256R-70PU FAQs

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

What is the memory organization of the AT27C256R-70PU?

The memory size is 262,144 bits, organized as 32K x 8 bits.

What is the maximum read access time?

The maximum read access time is 45ns.

What supply voltage is required?

The device operates from a 5V supply with ±10% tolerance.

What is the standby current consumption?

Maximum standby current is 100µA.

Does the device have ESD protection?

Yes, it provides 2,000V ESD protection.

What package options are available?

The AT27C256R-70PU is available in PDIP and PLCC packages.

What temperature ranges are supported?

The device is rated for industrial and automotive temperature ranges.