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Microchip Technology 24CSM01T-E/SN
- Part No.:
- 24CSM01T-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24CSM01T-E/SN.pdf
- Description:
- IC EEPROM 1MBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,107
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Product details
Overview
24CSM01T-E/SN from Microchip Technology is a 1-Mbit I²C serial EEPROM with integrated security register, ECC logic, and high-speed 3.4 MHz interface. It features a factory-programmed 128-bit unique serial number, 256-byte user-lockable ID page, hardware write-protect pin, and operates from 1.7V to 5.5V across -40°C to +125°C. Used in automotive infotainment calibration storage, industrial sensor configuration, and secure boot credential retention.
For engineers reviewing the 24CSM01T-E/SN datasheet, 24CSM01T-E/SN pinout, 24CSM01T-E/SN application, or 24CSM01T-E/SN equivalent, key selection considerations include its AEC-Q100 qualification, dual-zone write protection (hardware WP + software-configurable 128-Kbit zones), built-in ECC correction for four-byte reads, 1 µA standby current at 5.5V, and support for I²C Manufacturer ID command.
Technical Context
The 24CSM01T-E/SN implements a two-wire I²C interface with full High-Speed mode (3.4 MHz) compliance, Schmitt-trigger inputs on SDA/SCL for noise immunity, and slope-controlled outputs to suppress ground bounce. Its memory is organized as 512 pages × 256 bytes, enabling efficient page writes up to 256 bytes within a single self-timed 5 ms write cycle.
It integrates three dedicated register spaces: a read-only Configuration register (lockable after setup), a 4-Kbit Security register split into factory-programmed 128-bit serial number (0800h–080Fh) and user-programmable lockable ID page (0900h–090Fh), and a 24-bit Manufacturer ID register compliant with I²C standard identification protocol.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Mbit (131,072 × 8 bits), organized as 512 pages of 256 bytes each - enables efficient firmware patch storage and bulk parameter logging. |
| I²C Speed | Up to 3.4 MHz in High-Speed mode (2.5V–5.5V, Industrial temp) - reduces configuration time in high-throughput production programming. |
| Write Cycle Time | ≤5 ms max per byte or page - ensures deterministic timing for real-time system initialization sequences. |
| Write Endurance | 1,000,000 erase/write cycles - supports >10 years of daily recalibration in industrial control systems. |
| Data Retention | >200 years at 55°C - guarantees long-term integrity of vehicle VIN, calibration coefficients, and cryptographic keys. |
| Operating Voltage | 1.7V to 5.5V - interoperates with 1.8V microcontrollers and legacy 5V systems without level-shifting. |
| Temperature Range | -40°C to +125°C (Extended grade) - qualified for under-hood automotive and industrial edge computing environments. |
| ESD Protection | >4000V HBM - withstands handling and board-level ESD events in manufacturing and field service. |
Pinout & Package
24CSM01T-E/SN is packaged in an 8-lead SOIJ (Small Outline J-Bend) with wettable flank leads, optimized for automated optical inspection (AOI) and solder joint reliability in automotive PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| NC | No Connect | Unused internal node; must be left floating or tied to VSS per layout guidelines - no functional impact if unconnected. |
| A1, A2 | Hardware Address Inputs | Set 2-bit portion of 7-bit I²C client address; enable up to four devices on same bus - hardwired to VSS/VCC for static addressing. |
| VSS | Ground Reference | Primary return path for all internal circuitry and I/O - requires low-impedance connection to system ground plane. |
| SDA | Serial Data Line | Open-drain bidirectional I²C data line - requires external pull-up resistor (330Ω for 3.4 MHz, 10 kΩ for 100 kHz). |
| SCL | Serial Clock Input | Input-only clock line synchronized to host MCU - slope control eliminates ringing and ground bounce at high frequencies. |
| WP | Hardware Write-Protect | Active-high pin disabling all writes to memory and security registers when driven to VCC - enables fail-safe field update blocking. |
| VCC | Power Supply | 1.7V–5.5V supply input with monotonic ramp requirement (≤0.1 V/µs) - powers internal charge pump for EEPROM programming. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-Programmed 128-Bit Serial Number | Globally unique identifier preloaded at wafer test - eliminates post-manufacturing serialization overhead in automotive Tier-1 production lines. |
| User-Lockable 256-Byte ID Page | EEPROM space within Security register that can be permanently write-locked via software sequence - secures device-specific keys or calibration data against tampering. |
| Built-In ECC Logic | Corrects up to one bit error per four-byte read; Error Correction State (ECS) latch flags correction events - improves data integrity in electrically noisy automotive CAN domains. |
| Enhanced Software Write Protection | Configuration register enables independent locking of eight 128-Kbit memory zones - allows selective protection of bootloader, application, and user data partitions. |
| I²C Manufacturer ID Support | Returns unique 24-bit value on standardized I²C ID command - enables automatic device identification and BOM validation during system boot. |
Applications
| Automotive Calibration Storage | Industrial Sensor Configuration |
|---|---|
Use Scenario: Storing engine control unit (ECU) trim parameters, fuel mapping tables, and adaptive learning values across power cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed via I²C during ECU startup and runtime reconfiguration. Use Value: AEC-Q100 qualification and 125°C operation ensure reliability in under-hood environments; 1,000,000 write cycles support lifetime recalibration. | Use Scenario: Holding calibrated offset/gain coefficients, sensor linearization tables, and device-specific compensation data for smart pressure/temperature transmitters. IC Role / Device Role / Timing Role: Persistent parameter repository read at power-on and updated only during maintenance or field calibration. Use Value: Hardware WP pin prevents accidental overwrites during normal operation; ECC ensures data fidelity in electrically noisy factory floors. |
| Secure Boot Credential Storage | Medical Device Configuration Lock |
Use Scenario: Storing cryptographic keys, digital signatures, and root-of-trust certificates used during secure boot verification in connected medical gateways. IC Role / Device Role / Timing Role: Tamper-resistant key vault accessed exclusively by trusted execution environment (TEE) during boot sequence. Use Value: Preprogrammed 128-bit serial number binds credentials to physical hardware; lockable ID page prevents key extraction or modification. | Use Scenario: Preserving FDA-mandated device settings (e.g., dose limits, alarm thresholds, calibration history) that must remain immutable between patient treatments. IC Role / Device Role / Timing Role: Immutable configuration archive enforced by both hardware WP and software-configurable zone locks. Use Value: Dual protection layers (WP pin + Configuration register) meet IEC 62304 software safety requirements for Class C medical devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24CS128-SSHL-T | 128-Kbit capacity, 1 MHz max I²C speed, no built-in ECC or security register - lacks serial number and ID page functionality. | Lower-density, cost-sensitive consumer applications where AEC-Q100 and cryptographic binding are not required. | Select only if memory size ≤128 Kbit suffices and security features are unnecessary. |
| BR24G128FJ-3GE2 | 128-Kbit, supports 1 MHz I²C, includes 64-byte security register but no factory-programmed serial number or ECC - RoHS-compliant but not AEC-Q100 qualified. | Industrial automation modules requiring basic write protection and moderate temperature range (-40°C to +85°C). | Choose when extended temperature and automotive qualification are not mandatory and ECC is not critical. |
Compared with AT24CS128-SSHL-T and BR24G128FJ-3GE2, the 24CSM01T-E/SN delivers 8× higher density, automotive-grade reliability, hardware-enforced security primitives, and ECC-corrected reads - making it the sole option for AEC-Q100-compliant systems requiring cryptographic binding and long-term data integrity.
Availability
24CSM01T-E/SN is available at Aetrix Electronics and suitable for automotive infotainment calibration storage, industrial sensor configuration, and secure boot credential retention requiring stable component supply across extended lifecycle programs.
Supply support for 24CSM01T-E/SN includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology Inc. is a leading provider of microcontroller, analog, FPGA, and memory solutions, serving automotive, industrial, communications, and consumer markets with vertically integrated silicon and software platforms.
The 24CSM01T-E/SN belongs to Microchip's CS-series serial EEPROM family, designed specifically for automotive and high-reliability industrial applications demanding secure, long-life nonvolatile storage with integrated identity and error resilience.
FAQ
What is the maximum I²C clock frequency supported by the 24CSM01T-E/SN?
The 24CSM01T-E/SN supports up to 3.4 MHz in High-Speed mode when operating at VCC ≥2.5V and within the Industrial temperature range (-40°C to +85°C). At lower voltages (1.7V–2.5V) or Extended temperature (-40°C to +125°C), the maximum clock frequency is 1 MHz. This dual-speed capability allows flexible integration across diverse host controller platforms while maintaining timing compliance.
Does the 24CSM01T-E/SN include error correction, and how does it function?
Yes, the 24CSM01T-E/SN incorporates built-in Error Correction Code (ECC) logic that corrects up to one bit error per four-byte read operation. The Configuration register includes a read-only Error Correction State (ECS) latch that is set whenever ECC correction occurs, allowing firmware to log or respond to memory integrity events. This feature significantly enhances data reliability in electrically noisy environments such as automotive powertrain systems.
How is the 128-bit serial number implemented in the 24CSM01T-E/SN?
The 24CSM01T-E/SN contains a factory-programmed, globally unique 128-bit serial number stored in the first 16 bytes (0800h–080Fh) of its Security register. This value is programmed during wafer test and is guaranteed unique across the entire CS-series EEPROM family. It is read-only and cannot be altered, providing a hardware-rooted identity for device authentication, anti-counterfeiting, and secure provisioning workflows.
Can the 24CSM01T-E/SN be used in systems requiring AEC-Q100 qualification?
Yes, the 24CSM01T-E/SN is explicitly AEC-Q100 qualified for Grade 0 (-40°C to +125°C) and meets all stress testing requirements for automotive applications. Its qualification covers HTOL, TCT, ESD, and other reliability tests mandated for under-hood and safety-critical ECUs. The "E" suffix in 24CSM01T-E/SN denotes Extended temperature grade, confirming its suitability for automotive deployment.
What write protection mechanisms does the 24CSM01T-E/SN provide?
The 24CSM01T-E/SN offers dual-layer write protection: (1) hardware-based via the WP pin, which disables all writes when pulled high to VCC; and (2) software-configurable via the lockable Configuration register, enabling independent protection of eight 128-Kbit memory zones. Once locked, the Configuration register prevents further changes - ensuring persistent, tamper-resistant partitioning of bootloader, application, and user data regions.
24CSM01T-E/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Mbit
- Memory Organization:
- 128K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 70 ns
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
24CSM01T-E/SN FAQ
1.How can I place an order for 24CSM01T-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24CSM01T-E/SN on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 24CSM01T-E/SN reliable?
The price and inventory of 24CSM01T-E/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24CSM01T-E/SN is usually 5 days.
3.What payment methods are accepted for 24CSM01T-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24CSM01T-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24CSM01T-E/SN?
24CSM01T-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24CSM01T-E/SN order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 24CSM01T-E/SN?
For technical support, including 24CSM01T-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24CSM01T-E/SN requirements.
6.How does Aetrix verify that 24CSM01T-E/SN is sourced from the original manufacturer or authorized distributors?
All 24CSM01T-E/SN products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 24CSM01T-E/SN meets industry standards.
7.What is the process for return or replacement of 24CSM01T-E/SN?
All 24CSM01T-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24CSM01T-E/SN, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 24CSM01T-E/SN part is unused and in its original packaging.
Return procedure for 24CSM01T-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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