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Microchip 256 kB EPROM 28-Pin PDIP, OTP Memory, Parallel Interface, 70ns Access Time AT27C256R-70PU
Specifications
| Country of Origin | India |
|---|---|
| Brand | Microchip |
| Height | 4.8mm |
| Length | 37.3mm |
| Model | AT27C256R-70PU |
| Width | 13.9mm |
| Mount Type | Through Hole |
| Maximum Operating Temperature | 85°C |
| Package Type | PDIP |
| Minimum Operating Temperature | -40°C |
| Memory size | 256kB |
| Interface Type | Parallel |
| Pin Count | 28 |
| Maximum Supply Voltage | 5.5V |
| Minimum Supply Voltage | 4.5V |
| Supply Current | 100μA |
| Organisation | 32K x 8 Bit |
| Number of Bits per Word | 8 |
| Maximum Random Access Time | 70ns |
| Number of Words | 32k |
| Reprogramming Technique | OTP |
| Microchip 256kbit EPROM Chip 28-Pin PDIPBrand | Atmel |
| Greenwich Instruments 256kbit 70ns NVRAM, 28-Pin PDIP, GR3281-HTBrand | Greenwich Instruments |
Key Features
- Memory size is 256 kB with organisation of 32K x 8 bits.
- Maximum random access time is 70 nanoseconds ensuring fast data retrieval.
- Through hole mounting package type is PDIP with 28 pins.
- Operating voltage ranges from 4.5 V minimum to 5.5 V maximum.
- Operating temperature range is from -40°C to 85°C for robust environmental performance.
- Supply current is low at 100 microamperes enhancing energy efficiency.
- Device is OTP (One-Time Programmable) and cannot be erased or reprogrammed.
- Designed for reliable use in embedded systems and electronic components requiring stable EPROM storage.
Product Description
Microchip AT27C256R-70PU is a 256 kB EPROM memory chip designed in a 28-pin PDIP through-hole package. The device utilises a parallel interface and features a maximum random access time of 70 ns, making it suitable for embedded systems requiring fast and stable non-volatile memory.
This EPROM uses a one-time programmable (OTP) technique, meaning it is programmed once and cannot be reprogrammed or erased, as it lacks a UV-erasable window. This ensures data integrity and permanence after programming.
Operating voltage ranges from 4.5 V to 5.5 V with an extremely low supply current of 100 μA, making it efficient for power-sensitive applications. The operating temperature range of -40°C to 85°C supports use in a variety of industrial and commercial environments.
The package dimensions of 37.3 mm length, 13.9 mm width, and 4.8 mm height conform to standard PDIP form factors, facilitating easy integration into through-hole printed circuit boards.
This EPROM is ideal for applications requiring stable, permanent memory storage such as legacy system upgrades, embedded control systems, or other electronic components where data retention without reprogramming is critical. It is not suited for automotive-grade requirements.
256 kB memory size with 32K x 8 organization. 70 ns maximum random access time for fast operation. One-Time Programmable technology ensures data permanence. Standard 28-pin PDIP package facilitates easy mounting. Wide operating voltage and temperature range.
Energy-efficient design with low supply current. Suitable for industrial and commercial electronics. Compact dimensions support varied PCB designs. Explore the Microchip range of memory and semiconductor components in the Electronics & Electricals category at EnvMart.
Explore more products in our Memory Chips category.
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Frequently Asked Questions
The AT27C256R-70PU has a memory size of 256 kB, organized as 32K x 8 bits.
It features a maximum random access time of 70 nanoseconds, ensuring fast data retrieval.
The operating voltage for the AT27C256R-70PU ranges from 4.5 V to 5.5 V.
This model has a low supply current of 100 microamperes, enhancing energy efficiency.
The memory chip comes in a PDIP package type with 28 pins, suitable for through-hole mounting.
The dimensions of this model are 37.3 mm in length, 13.9 mm in width, and 4.8 mm in height.
The operating temperature range is from -40°C to 85°C, allowing for use in various environments.
It utilizes a parallel interface for data communication.
This model uses a One-Time Programmable (OTP) technique, meaning it cannot be erased or reprogrammed after initial programming.
It is designed for applications requiring stable, permanent memory storage, such as embedded control systems and legacy system upgrades.
The AT27C256R-70PU is manufactured in India.
The memory organization is 32K x 8 bits, allowing for efficient data storage and retrieval.
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