25AA256-I/P Microchip Integrated Circuit (Dual-In-Line Packages) In Stock
Microchip 25AA256-I/P is a 256Kbit SPI bus serial EEPROM in an 8-lead plastic DIP package supporting clock frequencies up to 10 MHz. It features 1,000,000 write/erase cycle endurance and 200-year data retention for reliable non-volatile storage. Available from authorized distributors with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Dual-In-Line Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- 25AA256-I/P Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.6900(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 256Kbit (32KB) SPI serial EEPROM with up to 10 MHz clock frequency for fast data access in embedded applications
- 1,000,000 write/erase cycle endurance ensures long service life in systems requiring frequent non-volatile data updates
- Operates as low as 1.8V minimum at 3 MHz, enabling use in low-power IoT and battery-operated designs
- 200-year minimum data retention provides virtually permanent non-volatile storage for configuration and calibration data
Applications
The 25AA256-I/P is widely used in embedded microcontroller systems for storing configuration parameters, firmware settings, and calibration tables in applications such as industrial sensors, consumer appliances, and automotive modules. Its SPI interface at up to 10 MHz enables rapid read/write access from popular microcontrollers including PIC, AVR, and ARM Cortex-M platforms. With 256Kbit capacity and 8-lead DIP packaging, it suits both breadboard prototyping and through-hole PCB production for non-volatile data logging and parameter storage.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | PDIP-8 |
| Factory Lead Time | 8Weeks |
| YTEOL | 8 |
| Additional Feature | OPERATES WITH 1.8VMIN @ 3MHZ |
| Clock Frequency-Max (fCLK) | 10MHz |
| Data Retention Time-Min | 200 |
| Endurance | 1000000 Write/Erase Cycles |
| JESD-30 Code | R-PDIP-T8 |
| JESD-609 Code | e3 |
| Memory Density | 262144bit |
| Memory IC Type | EEPROM |
| Memory Width | 8 |
| Number of Functions | 1 |
| Number of Ports | 1 |
| Number of Words | 32768words |
| Number of Words Code | 32000 |
| Operating Mode | SYNCHRONOUS |
| Organization | 32KX8 |
| Output Characteristics | 3-STATE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP8,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Parallel/Serial | SERIAL |
| Programming Voltage | 2.5V |
| Qualification Status | Not Qualified |
| Serial Bus Type | SPI |
| Standby Current-Max | 0.000001A |
| Supply Current-Max | 0.005mA |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 1.8V |
| Supply Voltage-Nom (Vsup) | 2.5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Write Cycle Time-Max (tWC) | 5ms |
| Write Protection | HARDWARE/SOFTWARE |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.32.00.51 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many write/erase cycles can the 25AA256-I/P handle before wear affects reliability?
The 25AA256-I/P is rated for a minimum of 1,000,000 write/erase cycles per byte location, far exceeding requirements for most embedded applications that update configuration or log data periodically. Combined with a 200-year minimum data retention, this makes the 25AA256-I/P a highly durable choice for systems where non-volatile storage must survive the product's entire service life without data loss.
At what supply voltage and clock speed can the 25AA256-I/P operate in a low-power IoT design?
The 25AA256-I/P operates as low as 1.8V minimum supply voltage at a clock frequency of 3 MHz, making it directly compatible with low-power IoT microcontrollers running on single-cell LiPo or AA batteries. At full 2.5V to 5.5V supply range, the SPI clock can reach up to 10 MHz, allowing rapid 256Kbit EEPROM access for firmware configurations or sensor calibration data in battery-constrained designs.
How does the 25AA256-I/P compare to an I2C EEPROM of equivalent capacity for a rapid prototype design?
The 25AA256-I/P uses a 4-wire SPI interface operating at up to 10 MHz, which is generally faster than standard I2C EEPROMs that are typically limited to 400 kHz (Fast mode) or 1 MHz (Fast-mode Plus). For prototyping on breadboards, the 8-lead DIP-8 package of the 25AA256-I/P is easy to hand-insert and compatible with standard 300-mil DIP sockets, whereas many I2C EEPROMs of 256Kbit capacity come in SOIC packages that require an adapter board for breadboard use.
Which microcontroller platforms directly support the SPI interface of the 25AA256-I/P?
The 25AA256-I/P is compatible with virtually all SPI-capable microcontrollers, including Microchip PIC, AVR, ARM Cortex-M (STM32, nRF52), and ESP32 platforms. With a 1.8V to 5.5V operating range and 10 MHz maximum clock, it interfaces natively with 3.3V and 5V logic systems, requiring no level-shifting in most designs. Its 256Kbit capacity over the standard 4-wire SPI bus is accessible through hardware SPI peripherals or bit-banged GPIO implementations.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.7200 | $1.72 |
| 100+ | $1.5200 | $152.00 |
| 125+ | $0.7300 | $91.25 |
| 300+ | $0.7150 | $214.50 |
| 750+ | $0.6900 | $517.50 |
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