The AT27C256R-70PU is a low-power, one-time programmable (OTP) read-only memory (EPROM) with a storage capacity of 256Kbits, organized as 32K x 8 bits. It operates with a single 5V power supply and features a fast read access time of 70ns, making it suitable for high-performance applications without the need for WAIT states. The device consumes a maximum of 20mA during active operation at 5MHz and only 100¬µA in standby mode, ensuring efficient power usage. This memory chip is available in standard JEDEC packages, specifically a 28-lead PDIP and a 32-lead PLCC, providing flexibility in design. It incorporates a rapid programming algorithm that allows for programming times of approximately 100¬µs per byte. The AT27C256R-70PU also includes features such as CMOS and TTL compatibility for inputs and outputs, an integrated product identification code, and robust reliability with 2,000V ESD protection and 200mA latchup immunity. The operating temperature range is suitable for industrial applications, rated from -40¬8C to 85¬8C. Additionally, a green packaging option is available, aligning with environmentally friendly practices. This product is ideal for applications requiring reliable firmware storage and quick access times.
Manufacturer: Microchip Technology
Win Source Part Number: 005608-AT27C256R-70P
Packaging: Tube/Rail
Mounting: Through Hole
Technology: EPROM - OTP
Memory Size: 256Kb (32K x 8)
Access Time: 70ns
Family Name: AT27C256R
Categories: Integrated Circuits
Status: Active
Temperature Range - Operating: -40°C to 85°C (TC)
Case / Package: 28-PDIP
Supply Voltage - Operating: 4.5 V to 5.5 V
Memory Format: EPROM
Alternative Parts (Cross-Reference): M27C256B-45XB7X; M27C256B-70XB6; M27C256B-12B6X;
Introduction Date: May 15, 1996
ECCN: EAR99
Country of Origin: Philippines, Taiwan, Thailand
Estimated EOL Date: 2023
Halogen Free: Compliant
Is this a common-used part?: Yes
Popularity: High
Fake Threat In the Open Market: 46 pct.
Supply and Demand Status: Limited
EPROM OTP 256K-bit 32Kx8 70ns 28-Pin
EPROM OTP 256K-bit 32Kx8 70ns 28-Pin
IC EPROM 256KBIT PARALLEL 28DIP
EPROM - OTP Memory IC 256Kb (32K x 8) Parallel 70ns 28-PDIP
IC EPROM 256KBIT PARALLEL 28DIP Product overview: AT27C256R-70PU 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-70PU can be used for catalog matching and distributor lookup.
EPROM, 256K 70NS OTP 28DIP
EPROM - OTP Memory IC 256Kbit Parallel 70 ns 28-PDIP
IC, EPROM 256K, 4.5-5.5V, 27C256; 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; Operating RoHS Compliant: Yes
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; MSL:- RoHS Compliant: Yes
ATMEL Integrated Circuits AT27C256R-70PU
IC EPROM 256KBIT PARALLEL 28DIP
IC EPROM 256KBIT PARALLEL 28DIP
| Win Source Electronics | RS Components, Ltd. | RS Components, Ltd. | ODG (Origin Data Global) | DigiKey | ERSAELECTRONICS PTE. LTD. | Allied Electronics, Inc. | Quarktwin Technology Ltd. | Newark, An Avnet Company | Radwell International | Shenzhen Shengyu Electronics Technology Limited | 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 | Memory Chips | Memory Chips |
| Product Number | 005608-AT27C256R-70PU | 1276559P | 1276559 | AT27C256R-70PU | AT27C256R-70PU-ND | 774-AT27C256R-70PU | 70123835 | AT27C256R-70PU | 80K9716 | AT27C256R-70PU | AT27C256R-70PU | |
| Product Name | Memory - Unclassified Memory - AT27C256R-70PU | EPROM | EPROM | Memory | Memory | Memory IC and Storage Component | EPROM, 256K 70NS OTP 28DIP | Memory | Ic, Eprom 256K, 4.5-5.5V, 27C256; Memory Size Microchip | Memory IC | Integrated Circuits (ICs) - Memory - Memory | Memory |
| Memory Category | EPROM; EPROM | EPROM | EPROM | EPROM; EPROM - OTP | EPROM | EPROM | EPROM | EPROM; EPROM | EPROM; Non-Volatile | EPROM; EPROM | ||
| Access Time | 70 ns | 70 ns | 70 ns | 70 ns | 70 ns | 70 ns | 70 ns | 70 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 ? C (-40 to ? F) | -40 to 85 C (-40 to 185 F) | -40 C (-40 F) | |||||
| Package Type | DIP; 28-PDIP | DIP | DIP; 28-DIP (0.600", 15.24mm) | DIP; "28-DIP (0.600"", 15.24mm)" | PDIP | DIP; 28-DIP (0.600\", 15.24mm) | DIP | |||||
| Supply Voltage | 4.5 V ~ 5.5 V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | -4.5V; 4.5 | 4.5V ~ 5.5V | Through Hole |
