256K EPROM IC CMOS Technology One Time Programmable AT27C256R-70JU

EPROM 256K High reliability CMOS technology One-time Programmable Read-only Memory AT27C256R-70JU

Features
 • Fast read access time – 45ns
 • Low-power CMOS operation– 100µA max standby– 20mA max active at 5MHz 
• JEDEC standard packages– 28-lead PDIP– 32-lead PLCC
 • 5V±10% supply
 • High reliability CMOS technology– 2,000V ESD protection– 200mA latchup immunity
 • Rapid programming algorithm – 100µs/byte (typical)
 • CMOS- and TTL-compatible inputs and outputs
 • Integrated product identification code
 • Industrial and automotive temperature ranges
 • Green (Pb/halide-free) packaging option
 1.
 Description
 The Atmel® AT27C256R is a low-power, high-performance, 262,144-bit, one-time pro
grammable, read-only memory (OTP EPROM) organized as 32K by 8 bits. It requires only 
one 5V power supply in normal read mode operation. Any byte can be accessed in less than 
45ns, eliminating the need for speed reducing WAIT states on high-performance micropro
cessor systems.
 The Atmel scaled CMOS technology provides low active power consumption and fast pro
gramming. Power consumption is typically only 8mA in active mode and less than 10µA in 
standby mode.
 The AT27C256R is available in a choice of industry-standard, JEDEC-approved, one-time 
programmable (OTP) PDIP and PLCC packages. All devices feature two-line control (CE, 
OE) to give designers the flexibility to prevent bus contention.
 With 32K byte storage capability, the AT27C256R allows firmware to be stored reliably and 
to be accessed by the system without the delays of mass storage media.
 The AT27C256R has additional features to ensure high quality and efficient production use. 
The rapid programming algorithm reduces the time required to program the part and guar
antees reliable programming. Programming time is typically only 100µs/byte. The 
integrated product identification code electronically identifies the device and manufacturer. 
This feature is used by industry-standard programming equipment to select the proper pro
gramming algorithms and voltages.

Packaging and transportation instructions

- According to the standard export packaging.

Customers can choose from cartons, wooden cases and wooden pallets according to their own requirements.

Q&A

1. How to obtain the price?

We usually quote within 24 hours after receiving your inquiry (except weekends and holidays). If you are in urgent need of a price, please send us an email or contact us in any other way so that we can provide you with a quotation.

2. What is your delivery time?

This depends on the quantity of the order and the season in which you place the order. Usually, we can ship the goods within 7 to 15 days (for small batches), and for large batches, it takes about 30 days.

3. What are your payment terms?

Factory price, 30% deposit, 70%T/T payment before shipment.

4. What is the mode of transportation?

It can be transported by sea, air or express delivery (EMS, UPS, DHL, TNT, FEDEX, etc.). Please confirm with us before placing an order.

5. How do you help our business establish a long-term and good relationship?

We maintain good quality and competitive prices to ensure that our customers benefit.

2. We respect every customer as our friend. We do business with them sincerely and make friends with them, no matter where they come from.