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Microchip Technology 24CSM01-I/SN
- Part No.:
- 24CSM01-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24CSM01-I/SN.pdf
- Description:
- IC EEPROM 1MBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,460
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Product details
Overview
24CSM01-I/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 operates from 1.7V to 5.5V, supports byte/page writes (up to 256 bytes), and delivers >200-year data retention. Used in automotive infotainment control modules for storing calibrated sensor offsets and firmware configuration flags.
For engineers reviewing the 24CSM01-I/SN datasheet, 24CSM01-I/SN pinout, 24CSM01-I/SN application, or 24CSM01-I/SN equivalent, key selection criteria include its AEC-Q100 qualification, factory-programmed 128-bit serial number, software-lockable 256-byte ID page, and dual write-protection modes (hardware WP pin + configurable zone protection).
Technical Context
The 24CSM01-I/SN implements a two-wire I²C interface with full High-Speed mode support (3.4 MHz at VCC ≥2.5V, industrial temp), Schmitt-trigger inputs for noise immunity, and slope-controlled outputs to suppress ground bounce. Its memory is organized as 512 pages × 256 bytes, with separate 4-Kbit security register space containing read-only 128-bit serial number and user-programmable lockable ID page.
It features a programmable Configuration register enabling either legacy full-array hardware write protection or enhanced software-defined zone protection across eight independent 128-Kbit regions. Built-in ECC corrects single-bit errors per 4-byte read and latches error correction state via dedicated ECS bit.
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 bulk parameter storage with page-aligned updates. |
| I²C Speed | Up to 3.4 MHz (High-Speed mode), 1 MHz standard - reduces firmware update time by ~3.4× vs. 100 kHz I²C in production programming. |
| Write Cycle Time | ≤5 ms max self-timed byte/page write - ensures deterministic timeout handling in real-time host firmware. |
| Operating Voltage | 1.7V to 5.5V - interoperates directly with 1.8V, 3.3V, and 5V microcontrollers without level shifters. |
| Data Retention | >200 years at 55°C - guarantees calibration data integrity over full vehicle lifecycle in automotive applications. |
| Endurance | 1,000,000 write cycles - supports frequent runtime logging (e.g., odometer, fault counters) in telematics units. |
| Security Register | 128-bit factory-unique serial number + 256-byte user-programmable/lockable ID page - eliminates line-side serialization and secures device identity binding. |
Pinout & Package
24CSM01-I/SN is packaged in an 8-lead SOIC (Small Outline Integrated Circuit) with industry-standard 150-mil body width and 1.27 mm pitch. Pin 1 is marked with a beveled corner or dot; pin numbering follows standard counter-clockwise orientation from the marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Hardware Address Input | Configures bit A1 of 7-bit I²C client address; must be hardwired to VSS or VCC to select one of four possible bus addresses. |
| A2 | Hardware Address Input | Configures bit A2 of 7-bit I²C client address; used with A1 to enable up to four 24CSM01-I/SN devices on same I²C bus. |
| 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 (e.g., 2 kΩ for 1 MHz operation). |
| SCL | Serial Clock Input | Input-only I²C clock line; host-generated timing signal synchronizing all data transfers. |
| WP | Write-Protect Control | Active-high hardware lock: tied to VCC disables all writes to memory and security register; ignored in enhanced software protection mode. |
| VCC | Power Supply | Single supply input (1.7–5.5V); powers EEPROM core, I²C interface, and security logic; decoupling capacitor required. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Validated for automotive use (-40°C to +85°C), enabling deployment in engine control, ADAS, and body electronics without additional qualification effort. |
| Factory-Programmed Serial Number | 128-bit globally unique identifier preloaded in read-only security register section - eliminates manufacturing serialization overhead and enables secure device binding. |
| Enhanced Software Write Protection | Configuration register allows locking of eight independent 128-Kbit zones via software command - supports granular protection of calibration, security keys, and firmware metadata. |
| Built-in ECC Logic | Corrects single-bit errors per 4-byte read and sets Error Correction State (ECS) latch - improves reliability in EMI-prone automotive environments without host-side error handling. |
| I²C Manufacturer ID Support | Returns unique 24-bit ID on request - enables automatic device identification and firmware version validation during system boot. |
Applications
| Automotive Calibration Storage | Industrial Sensor Node Identity |
|---|---|
Use Scenario: Storing temperature-compensated ADC offset values and gain coefficients for engine coolant sensors across production batches. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with guaranteed 200-year retention and AEC-Q100 compliance for under-hood deployment. Use Value: Eliminates recalibration during vehicle service; factory-programmed serial number binds calibration data to specific ECU hardware. | Use Scenario: Assigning unique identifiers and cryptographic keys to wireless sensor nodes in predictive maintenance gateways. IC Role / Device Role / Timing Role: Secure identity anchor with lockable 256-byte ID page and ECC-protected reads in harsh factory-floor environments. Use Value: Enables zero-touch provisioning; software-configurable zone protection isolates key material from firmware update partitions. |
| Medical Device Configuration | Consumer Appliance Settings |
Use Scenario: Persisting user-adjusted therapy parameters and audit logs in portable infusion pumps with regulatory traceability requirements. IC Role / Device Role / Timing Role: Tamper-evident configuration store with hardware WP pin and software-locked security register for FDA 21 CFR Part 11 compliance. Use Value: Prevents unauthorized parameter changes; built-in ECC ensures log integrity despite power interruptions during critical delivery cycles. | Use Scenario: Saving user preferences (e.g., cooking modes, display brightness) and energy usage history in smart ovens with 10+ year product lifetime. IC Role / Device Role / Timing Role: Low-power, high-endurance memory supporting 1M+ write cycles and 1.7V operation for battery-backed backup. Use Value: Extends battery life via 1 µA standby current; wide voltage range simplifies integration with mixed-supply MCU platforms. |
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, no security register, no ECC, max 1 MHz I²C, industrial temp only | Lacks AEC-Q100 qualification, serial number, and zone-level write protection | Select only for cost-sensitive non-automotive designs where 128-Kbit capacity suffices and security/ECC are not required. |
| BR24G128FJ-WE2 | 128-Kbit, 1.7–5.5V, 3.4 MHz I²C, includes 128-bit ID but no user-programmable lockable page or ECC | Offers basic ID but no configurable zone protection or error correction; JEDEC MSOP-8 package differs from SOIC-8 | Use when footprint compatibility is secondary and simplified security (read-only ID only) meets application needs. |
Compared with AT24CS128-SSHL-T and BR24G128FJ-WE2, the 24CSM01-I/SN provides 8× more memory, AEC-Q100 qualification, factory-unique serial number + lockable ID page, and ECC - making it the only option qualified for safety-critical automotive calibration and secure identity storage.
Availability
24CSM01-I/SN is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor nodes, medical infusion pumps, and consumer appliance control modules requiring stable component supply across extended product lifecycles.
Supply support for 24CSM01-I/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 microcontrollers, analog, FPGA, and memory solutions, serving automotive, industrial, and communications markets with vertically integrated silicon and software.
The 24CSM01-I/SN belongs to Microchip's CS-series serial EEPROM family, designed specifically for automotive-grade, high-reliability nonvolatile storage with integrated security and error resilience for mission-critical configuration and identity management.
FAQ
What is the maximum I²C clock frequency supported by the 24CSM01-I/SN?
The 24CSM01-I/SN supports up to 3.4 MHz in High-Speed mode when VCC is ≥2.5V and operating within the industrial temperature range (-40°C to +85°C). At lower voltages (1.7V–2.5V) or extended temperature, the maximum clock frequency is 1 MHz. This enables faster firmware updates and parameter loading compared to standard 400 kHz EEPROMs.
Does the 24CSM01-I/SN include error correction capability?
Yes, the 24CSM01-I/SN incorporates built-in Error Correction Code (ECC) logic that corrects up to one incorrectly read bit within any 4-byte readout. The Configuration register includes a read-only Error Correction State (ECS) latch that indicates when ECC correction has been applied - enhancing data integrity in electrically noisy automotive and industrial environments.
How is the 128-bit serial number implemented in the 24CSM01-I/SN?
The 24CSM01-I/SN contains a factory-programmed, globally unique 128-bit serial number stored in the first 16 bytes of its read-only Security register section (address 0800h–080Fh). This value is immutable and shared across the entire CS-series EEPROM family, enabling unambiguous device identification without requiring line-side programming during manufacturing.
Can the 24CSM01-I/SN be used in automotive applications?
Yes, the 24CSM01-I/SN is AEC-Q100 qualified for automotive use and rated for the industrial temperature range (-40°C to +85°C). Its design includes ESD protection (>4000V), >200-year data retention, and 1,000,000 write cycles - meeting stringent reliability requirements for engine control units, ADAS modules, and body electronics where long-term data integrity is critical.
What write protection mechanisms does the 24CSM01-I/SN offer?
The 24CSM01-I/SN provides dual write protection: (1) hardware-based via the WP pin (active-high full-array lock), and (2) software-configurable via the Configuration register, which enables independent locking of eight 128-Kbit memory zones. Once locked, the Configuration register itself can be permanently write-protected to prevent further changes to protection settings.
24CSM01-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- 3.4 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 70 ns
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
24CSM01-I/SN FAQ
1.How can I place an order for 24CSM01-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24CSM01-I/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 24CSM01-I/SN reliable?
The price and inventory of 24CSM01-I/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24CSM01-I/SN is usually 5 days.
3.What payment methods are accepted for 24CSM01-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24CSM01-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24CSM01-I/SN?
24CSM01-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24CSM01-I/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 24CSM01-I/SN?
For technical support, including 24CSM01-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24CSM01-I/SN requirements.
6.How does Aetrix verify that 24CSM01-I/SN is sourced from the original manufacturer or authorized distributors?
All 24CSM01-I/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 24CSM01-I/SN meets industry standards.
7.What is the process for return or replacement of 24CSM01-I/SN?
All 24CSM01-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24CSM01-I/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 24CSM01-I/SN part is unused and in its original packaging.
Return procedure for 24CSM01-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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