25LC640T-I/SN Microchip Integrated Circuit (Other) In Stock
25LC640T-I/SN is a 64 Kbit SPI serial EEPROM from Microchip supporting up to 2 MHz clock, 1 million write/erase cycles, and 200-year data retention. Packaged in an 8-pin SOIC for easy PCB integration.
- Manufacturer
- Microchip
- Package
- Other
- Pin Count
- 8
- Lifecycle
- NOT RECOMMENDED
- Datasheet
- 25LC640T-I/SN Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.5000(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
- 64 Kbit SPI EEPROM with up to 2 MHz clock frequency for fast serial data transfers in embedded systems
- 1,000,000 write/erase cycle endurance with minimum 200-year data retention ensures long-term reliability
- 8-pin SOIC-8 package simplifies PCB layout and is compatible with standard SPI microcontroller interfaces
Applications
The 25LC640T-I/SN is ideal for embedded systems requiring non-volatile configuration storage, such as industrial controllers, smart meters, and consumer electronics. Its 64 Kbit capacity and 2 MHz SPI interface allow fast read/write operations for parameter tables, calibration data, and firmware settings. The SOIC-8 form factor and 1,000,000-cycle endurance make it a reliable choice for cost-sensitive, high-reliability designs.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOIC-8 |
| Factory Lead Time | 6Weeks |
| Date Of Intro | 1997-09-01 |
| YTEOL | 3 |
| Clock Frequency-Max (fCLK) | 2MHz |
| Data Retention Time-Min | 200 |
| Endurance | 1000000 Write/Erase Cycles |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e3 |
| Memory Density | 65536bit |
| Memory IC Type | EEPROM |
| Memory Width | 8 |
| Number of Functions | 1 |
| Number of Ports | 1 |
| Number of Words | 8192words |
| Number of Words Code | 8000 |
| Operating Mode | SYNCHRONOUS |
| Organization | 8KX8 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.23 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Parallel/Serial | SERIAL |
| Peak Reflow Temperature (Cel) | 260 |
| Programming Voltage | 5V |
| Qualification Status | Not Qualified |
| Screening Level | TS 16949 |
| Serial Bus Type | SPI |
| Standby Current-Max | 0.000005A |
| Supply Current-Max | 0.005mA |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Write Cycle Time-Max (tWC) | 5ms |
| Write Protection | HARDWARE |
| Package | Other |
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 | Taiwan, Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for 25LC640T-I/SN:
Frequently Asked Questions
What is the maximum SPI clock frequency supported by the 25LC640T-I/SN?
The 25LC640T-I/SN supports a maximum SPI clock frequency of 2 MHz, enabling efficient serial data transfers for storing and retrieving 64 Kbits of non-volatile data in embedded microcontroller applications running at 3.3 V or 5 V supply voltages.
How long can data stored in the 25LC640T-I/SN be retained without power?
Data retention in the 25LC640T-I/SN is rated at a minimum of 200 years, far exceeding typical EEPROM requirements. This makes it suitable for applications storing critical configuration data or calibration constants that must survive decades of operation without any refresh or re-programming cycles.
Which embedded designs benefit most from the 25LC640T-I/SN's 1,000,000 write/erase cycle endurance?
Applications with frequent parameter updates benefit most, including industrial PLC systems logging process variables, smart energy meters updating billing counters, and IoT sensor nodes writing measurement logs every few minutes. At 1,000,000 write/erase cycles, the 25LC640T-I/SN outlasts designs running for over 10 years at 100 writes per day.
Can the 25LC640T-I/SN replace other Microchip SPI EEPROMs in the same footprint?
Yes. The 25LC640T-I/SN is pin-compatible with other devices in the 25LCxxx family including the 25LC256 and 25LC128, all using the same SOIC-8 package. Designers can swap densities from 8 Kbit up to 512 Kbit without PCB changes, simply by selecting the matching MPN variant.
Related Guides
150141RS73100 Red LED Indicator and Current-Resistor Design Guide
Design a reliable 150141RS73100 red LED indicator with worst-case resistor sizing, GPIO checks, PWM drive, layout, and production validation.
Jul 11, 2026
742792651 Ferrite Bead EMI Filter and Power Integrity Design Guide
Practical guidance for using 742792651 in ferrite-bead EMI filters, including bias, DCR, damping, layout, and validation.
Jul 11, 2026
How to Choose a Ferrite Bead for EMI Suppression Rails: Selection Guide
Compare 742792651 and related ferrite beads by impedance, current rating, DCR, package, layout, and EMI test context.
Jul 10, 2026
150141BS73100 Design Guide for 3528 Status Indicator LED Circuits
Design 3528 status indicator LED circuits with 150141BS73100: current setting, resistor sizing, polarity, optics, and sourcing checks.
Jul 10, 2026
Why Buy from FindMyChip
About Microchip
Microchip is a leading electronic component manufacturer. FindMyChip sources Microchip ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.9170 | $0.92 |
| 250+ | $0.5008 | $125.20 |
| 500+ | $0.5004 | $250.20 |
| 1000+ | $0.5000 | $500.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“FindMyChip sourced our entire STM32 BOM in 48 hours when our usual distributor had 16-week lead times.”