25CSM04T-I/SN Microchip Integrated Circuit (Small Outline Packages) In Stock
25CSM04T-I/SN is a 4 Mbit (512 KB) SPI EEPROM from Microchip in an SOIC-8 package, supporting up to 8 MHz clock, 1,000,000 write/erase cycles, and 100-year minimum data retention. It offers robust non-volatile storage in a compact 8-pin footprint for embedded systems. Available with worldwide shipping and a 16-week factory lead time.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- 25CSM04T-I/SN Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.8200(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of 25CSM04T-I/SN?
- 4 Mbit (4,194,304-bit) SPI EEPROM providing 512 KB non-volatile storage at up to 8 MHz interface speed
- 1,000,000 write/erase cycle endurance for high-frequency data logging and configuration update applications
- 100-year minimum data retention ensuring reliable long-term storage in deployed embedded systems
- 8-pin SOIC package for easy integration into space-constrained PCB designs with standard SPI bus
What is 25CSM04T-I/SN used for?
The 25CSM04T-I/SN is ideal for embedded applications requiring reliable non-volatile configuration storage, such as industrial IoT gateways, smart meters, and automotive body control modules that update firmware parameters up to 1,000,000 times over the product lifetime. Its 8 MHz SPI interface enables fast page reads of 256-byte blocks in under 32 µs, supporting high-throughput data logging in sensor fusion systems. The 100-year retention guarantee makes it suitable for safety-critical records storage in medical and infrastructure monitoring devices.
What are the specifications of 25CSM04T-I/SN?
| Manufacturer Package Code | SOIC-8 |
| Factory Lead Time | 16Weeks |
| YTEOL | 20 |
| Clock Frequency-Max (fCLK) | 8MHz |
| Data Retention Time-Min | 100 |
| Endurance | 1000000 Write/Erase Cycles |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e3 |
| Memory Density | 4194304bit |
| Memory IC Type | EEPROM |
| Memory Width | 8 |
| Number of Functions | 1 |
| Number of Ports | 1 |
| Number of Words | 524288words |
| Number of Words Code | 512000 |
| Operating Mode | SYNCHRONOUS |
| Organization | 512KX8 |
| 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 |
| Serial Bus Type | SPI |
| Standby Current-Max | 0.000002A |
| Supply Current-Max | 0.003mA |
| 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/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 | Mainland China, Thailand |
Where can I find the 25CSM04T-I/SN datasheet?
25CSM04T-I/SN Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for 25CSM04T-I/SN?
Compatible alternatives and drop-in replacements for 25CSM04T-I/SN:
Microchip Technology Inc 4M SPI SEEPROM
Frequently Asked Questions
How does the 1,000,000 write/erase endurance of the 25CSM04T-I/SN translate to product service life in a daily-logging application?
With 1,000,000 write/erase cycles and a data retention of at least 100 years per cell, the 25CSM04T-I/SN can sustain daily full-chip erase-write cycles for approximately 2,739 years. Even at 100 writes per day across the 512 KB address space, the EEPROM comfortably exceeds a 20-year product design life, making it appropriate for industrial IoT data recorders and smart meter configuration storage.
For an 8 MHz SPI bus, how quickly can the 25CSM04T-I/SN transfer a full 512 KB data read?
At 8 MHz SPI clock frequency, each bit transfers in 125 ns, giving a raw data rate of 1 MB/s. Reading the full 4 Mbit (512 KB) memory sequentially takes approximately 4 ms, which is fast enough for firmware image verification at boot in systems with 100 ms startup time budgets. This also supports real-time configuration reload in industrial control units between 10 ms task cycles.
Why is the 25CSM04T-I/SN in an SOIC-8 package a good choice for retrofitting legacy embedded designs compared to larger memory packages?
The SOIC-8 package footprint of approximately 5 mm x 4 mm with 1.27 mm pin pitch is compatible with standard PCB design rules dating back over 20 years, allowing the 25CSM04T-I/SN to drop into existing board layouts without re-routing. Its 4 Mbit density in this small outline form factor provides a 4x capacity upgrade over older 1 Mbit SOIC-8 EEPROMs, reducing the number of memory devices needed on a board from 4 to 1.
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More from Microchip
| Qty. | Unit Price | Ext. Price |
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| 1+ | $2.3400 | $2.34 |
| 100+ | $2.0400 | $204.00 |
| 1000+ | $1.9300 | $1930.00 |
| 5000+ | $1.8200 | $9100.00 |
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