The AT27C256R-45PU is a low-power, one-time programmable read-only memory (OTP EPROM) with a storage capacity of 256K bits, organized as 32K by 8 bits. It operates with a single 5V power supply and features a fast read access time of 45ns, making it suitable for high-performance microprocessor systems without the need for WAIT states. The device consumes a maximum of 20mA during active operation at 5MHz and only 100µA in standby mode. This memory chip is available in industry-standard 28-lead PDIP and 32-lead PLCC packages, ensuring compatibility with various designs. It incorporates a rapid programming algorithm that allows for programming times of approximately 100µs per byte. The AT27C256R also includes features such as CMOS- and TTL-compatible inputs and outputs, an integrated product identification code, and high reliability with 2,000V ESD protection and 200mA latchup immunity. Operating temperature ranges are suitable for industrial and automotive applications, and the product is offered in a green packaging option that is free from lead and halides. This combination of features makes the AT27C256R-45PU a reliable choice for applications requiring efficient firmware storage and retrieval.
Manufacturer: Microchip Technology
Win Source Part Number: 812254-AT27C256R-45P
Packaging: Tube
Mounting Style: Through Hole
Technology: EPROM - OTP
Memory Type: Non-Volatile
Memory Size: 256Kb (32K x 8)
Access Time: 45ns
Supplier Device Package: 28-PDIP
Temperature Range - Operating: -40°C ~ 85°C (TC)
Memory Format: EPROM
Memory Interface: Parallel
Manufacturer Package: 28-DIP (0.600", 15.24mm)
Popularity: Low
Fake Threat In the Open Market: 72 pct.
Supply and Demand Status: Limited
Manufacturer Pack Quantity: 14
MSL Level: 1 (Unlimited)
Supply Voltage (V): 4.5V ~ 5.5V
Part Number Series: AT27C256
EPROM - OTP Memory IC 256Kb (32K x 8) Parallel 45ns 28-PDIP
IC EPROM 256KBIT PARALLEL 28DIP
IC EPROM 256KBIT PARALLEL 28DIP Product overview: AT27C256R-45PU from Microchip Technology is a Memory IC and Storage Component for data storage, firmware boot, embedded logging, industrial controllers, computing modules, and replacement sourcing. It is useful for engineers and buyers comparing datasheets, replacement parts, BOM lines, package options, lifecycle status, and procurement availability. Key searchable attributes include key electrical ratings, package details, and application requirements. Search-friendly keywords include memory IC, Flash, SRAM, DRAM, storage module, Memory IC and Storage Component, Memory ICs Products. This listing supports clearer product discovery for industrial, commercial, repair, automation, power, sensing, and embedded system projects. Product number 774-AT27C256R-45PU can be used for catalog matching and distributor lookup.
EPROM OTP 256K-bit 32Kx8 45ns 28-Pin
EPROM OTP 256K-bit 32Kx8 45ns 28-Pin
EPROM - OTP Memory IC 256Kbit Parallel 45 ns 28-PDIP
IC EPROM 256KBIT PARALLEL 28DIP
ONE TIME PROGRAMMABLE (OTP) EPROM IC; Memory Size:256Kbit; EPROM Memory Configuration:32K x 8bit; No. of Pins:28Pins; Memory Case Style:DIP; Supply Voltage Min:4.5V; Supply Voltage Max:5.5V; Operating Temperature Min:-40°C RoHS Compliant: Yes
IC EPROM 256KBIT PARALLEL 28DIP
| Win Source Electronics | DigiKey | ODG (Origin Data Global) | ERSAELECTRONICS PTE. LTD. | RS Components, Ltd. | RS Components, Ltd. | Quarktwin Technology Ltd. | Shenzhen Shengyu Electronics Technology Limited | Newark, An Avnet Company | Lingto Electronic Limited | |
|---|---|---|---|---|---|---|---|---|---|---|
| Product Category | Memory Chips | Memory Chips | Memory Chips | Memory Chips | Memory Chips | Memory Chips | Memory Chips | Memory Chips | Memory Chips | Memory Chips |
| Product Number | 812254-AT27C256R-45PU | AT27C256R-45PU-ND | AT27C256R-45PU | 774-AT27C256R-45PU | 1276557 | 1276557P | AT27C256R-45PU | AT27C256R-45PU | 68T4280 | AT27C256R-45PU |
| Product Name | Memory - EPROM - AT27C256R-45PU | Memory | Memory | Memory IC and Storage Component | EPROM | EPROM | Memory | Integrated Circuits (ICs) - Memory - Memory | One Time Programmable (Otp) Eprom Ic; Memory Size Microchip | Memory |
| Memory Category | EPROM; Non-Volatile | EPROM | EPROM; EPROM - OTP | EPROM | EPROM | EPROM | EPROM; EPROM | EPROM; Non-Volatile | EPROM; EPROM | |
| Access Time | 45 ns | 45 ns | 45 ns | 45 ns | 45 ns | 45 ns | 45 ns | |||
| Operating Temperature | -40 to 85 C (-40 to 185 F) | -40 to 85 C (-40 to 185 F) | -40 to 85 C (-40 to 185 F) | -40 C (-40 F) | -40 to 85 C (-40 to 185 F) | -40 C (-40 F) | ||||
| Package Type | DIP | DIP; "28-DIP (0.600"", 15.24mm)" | DIP; 28-DIP (0.600", 15.24mm) | DIP | DIP; 28-DIP (0.600\", 15.24mm) | DIP | ||||
| Supply Voltage | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | -4.5V; 4.5 | 4.5V ~ 5.5V | Through Hole |
