25AA128-I/ST Microchip Integrated Circuit (Small Outline Packages) In Stock
The 25AA128-I/ST is a 128Kbit (32K x 8) low-voltage SPI serial EEPROM from Microchip, operating at 1.8 V to 5.5 V with a 10 MHz SPI clock and 1,000,000 write/erase cycle endurance in a compact 8-pin TSSOP package. It delivers 200-year minimum data retention with hardware and software write protection for secure nonvolatile storage. Available in stock with worldwide shipping for embedded, IoT, and consumer electronics designs.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- 25AA128-I/ST Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 128Kbit (32KB) capacity with 10 MHz SPI clock enables fast, high-volume data storage and retrieval in embedded systems
- 1.8 V to 5.5 V wide supply range supports direct interfacing with modern low-voltage microcontrollers and IoT SoCs
- 1,000,000 write/erase cycle endurance with 200-year data retention ensures long-term reliability for configuration storage
- 8-pin TSSOP package (JESD-30 R-PDSO-G8) offers a smaller footprint than standard SOIC for space-constrained designs
Applications
The 25AA128-I/ST is widely deployed for storing firmware parameters, calibration tables, and system configuration data in microcontroller-based industrial and consumer embedded systems. Its low 1.8 V operating voltage and fast 10 MHz SPI interface make it ideal for IoT gateway modules, wireless sensor nodes, and smart home devices that require compact, power-efficient nonvolatile storage. High endurance and long data retention also suit applications such as data loggers, medical instrumentation, and automotive body electronics where data integrity is critical.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | TSSOP-8 |
| Factory Lead Time | 32Weeks |
| YTEOL | 8 |
| Clock Frequency-Max (fCLK) | 10MHz |
| Data Retention Time-Min | 200 |
| Endurance | 1000000 Write/Erase Cycles |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e3 |
| Memory Density | 131072bit |
| Memory IC Type | EEPROM |
| Memory Width | 8 |
| Number of Functions | 1 |
| Number of Ports | 1 |
| Number of Words | 16384words |
| Number of Words Code | 16000 |
| Operating Mode | SYNCHRONOUS |
| Organization | 16KX8 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Parallel/Serial | SERIAL |
| Peak Reflow Temperature (Cel) | 260 |
| Programming Voltage | 2.5V |
| Qualification Status | Not Qualified |
| Screening Level | AEC-Q100 |
| 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 | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| Write Cycle Time-Max (tWC) | 5ms |
| Write Protection | HARDWARE/SOFTWARE |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.32.00.51 |
| Country of Origin | Malaysia, Philippines, Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the storage capacity and organization of the 25AA128-I/ST?
The 25AA128-I/ST provides 128Kbit (131,072 bits) of EEPROM storage, organized as 32,768 bytes (32K x 8). It is internally divided into 512 pages of 64 bytes each, supporting page write operations that allow up to 64 bytes to be written in a single write cycle for improved throughput.
What SPI clock frequency does the 25AA128-I/ST support?
The 25AA128-I/ST supports SPI clock frequencies up to 10 MHz, enabling rapid sequential data reads and writes. Combined with the standard SPI protocol (modes 0,0 and 1,1), it integrates easily with most microcontroller SPI peripherals without additional glue logic or level shifting at 3.3 V.
What supply voltage does the 25AA128-I/ST require?
The 25AA128-I/ST operates from a supply voltage of 1.8 V to 5.5 V. This wide range covers the 1.8 V rails used by modern low-power SoCs, 3.3 V logic common in embedded boards, and legacy 5 V TTL systems, making it broadly compatible across generations of hardware.
How many write cycles is the 25AA128-I/ST rated for?
The 25AA128-I/ST is rated for 1,000,000 write/erase cycles per address location with a minimum data retention of 200 years. This high endurance and retention are achieved through Microchip's advanced floating-gate EEPROM cell technology and makes the device suitable for applications requiring frequent configuration updates.
What package is the 25AA128-I/ST available in?
The 25AA128-I/ST comes in an 8-pin TSSOP (Thin Shrink Small Outline Package) with JEDEC code R-PDSO-G8. The TSSOP footprint is approximately 30% smaller than a standard 8-pin SOIC, which is advantageous in space-constrained PCB layouts such as wearables, hearing aids, and high-density industrial modules.
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