25AA040A-I/P Microchip Integrated Circuit (Dual-In-Line Packages) In Stock
25AA040A-I/P is a Microchip 4Kbit (512-byte) SPI EEPROM in an 8-pin DIP package, operating from 1.8V to 5.5V with a 10MHz clock and 1,000,000 write/erase cycle endurance. It provides 200-year data retention and a simple 4-wire SPI interface, making it ideal for low-cost non-volatile storage in embedded systems.
- Manufacturer
- Microchip
- Package
- Dual-In-Line Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- 25AA040A-I/P Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.4767(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
- 4Kbit (512-byte) SPI EEPROM with 10MHz clock frequency supports fast serial read/write in embedded microcontroller designs
- 1,000,000 write/erase cycle endurance with 200-year minimum data retention ensures long product lifetime in parameter-storage applications
- Wide supply range of 1.8V to 5.5V enables use across 1.8V, 3.3V, and 5V microcontroller systems without level-shifting
- Industry-standard 8-pin DIP (PDIP-8) package with lead-free (Pb-free) construction for easy prototyping and through-hole production assembly
Applications
The 25AA040A-I/P is used to store device configuration parameters, calibration constants, and user settings in microcontroller-based systems such as industrial sensors, smart meters, and consumer appliances. Its 4-wire SPI interface and 1.8V to 5.5V supply range allow direct connection to PIC, AVR, STM32, and other popular MCUs without external level shifters. The 1,000,000-cycle endurance and 200-year retention make it suitable for any application requiring frequent but long-lived non-volatile write operations.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | PDIP-8 |
| Factory Lead Time | 9Weeks |
| YTEOL | 8 |
| 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 | 4096bit |
| Memory IC Type | EEPROM |
| Memory Width | 8 |
| Number of Functions | 1 |
| Number of Ports | 1 |
| Number of Words | 512words |
| Number of Words Code | 512 |
| Operating Mode | SYNCHRONOUS |
| Organization | 512X8 |
| 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 | 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) | 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
Compatible alternatives and drop-in replacements for 25AA040A-I/P:
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Frequently Asked Questions
What memory size and SPI clock speed does the 25AA040A-I/P support?
The 25AA040A-I/P provides 4Kbit (512 bytes) of non-volatile EEPROM storage accessible over a 4-wire SPI bus at up to 10MHz clock frequency. This combination of compact size and fast serial access makes it suitable for storing configuration data, calibration tables, or small firmware parameters in embedded microcontroller designs.
How long can 25AA040A-I/P retain stored data and how many write cycles does it support?
Microchip specifies the 25AA040A-I/P for a minimum 200-year data retention period and up to 1,000,000 write/erase cycles per memory location. These ratings ensure the device remains reliable over decades of operation even in applications that update stored parameters frequently, such as daily calibration logs or event counters in industrial instrumentation.
Which microcontroller supply voltages is 25AA040A-I/P compatible with, and does it require a level shifter?
The 25AA040A-I/P operates from 1.8V to 5.5V, which spans the full range of common MCU supply voltages including 1.8V ultra-low-power devices, 3.3V ARM Cortex-M boards, and 5V AVR/PIC systems. Because it accepts the same VCC logic levels natively, no external level-shifting circuitry is required, simplifying the BOM and reducing cost.
When is a 25AA040A-I/P a practical choice over a larger SPI Flash device for configuration storage?
For applications that only need to store up to 512 bytes of device parameters, calibration offsets, or user settings, the 25AA040A-I/P is more cost-effective and power-efficient than a larger SPI Flash device. Unlike Flash memory, the 25AA040A-I/P supports byte-level writes without block-erase overhead, and its PDIP-8 package simplifies prototyping on breadboards, making it ideal for designs where 4Kbit of reliable, frequently-updated non-volatile storage is sufficient.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.6500 | $0.65 |
| 25+ | $0.6100 | $15.25 |
| 100+ | $0.5400 | $54.00 |
| 2640+ | $0.4867 | $1284.76 |
| 5280+ | $0.4792 | $2530.28 |
| 10560+ | $0.4767 | $5034.37 |
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