My Inquiry
My Account
Microchip Technology 24CSM01-I/MS
- Part No.:
- 24CSM01-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
24CSM01-I/MS.pdf
- Description:
- IC EEPROM 1MBIT I2C 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,088
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
24CSM01-I/MS 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, user-lockable 256-byte ID page, hardware write-protect pin, and operates across 1.7V–5.5V. Used in automotive infotainment control modules for storing calibrated sensor offsets and firmware configuration flags.
For engineers reviewing the 24CSM01-I/MS datasheet, 24CSM01-I/MS pinout, 24CSM01-I/MS application, or 24CSM01-I/MS equivalent, key selection criteria include industrial temperature support (−40°C to +85°C), AEC-Q100 qualification, 5 ms max self-timed write cycle, enhanced software write protection per 128-Kbit zone, and compatibility with legacy I²C systems at 100 kHz/400 kHz/1 MHz.
Technical Context
The 24CSM01-I/MS implements a dual-register architecture: a 1-Mbit main EEPROM array organized as 512 × 256-byte pages, and a separate 4-Kbit security register split into read-only 128-bit serial number (0800h–080Fh) and programmable/lockable 256-byte ID page (0900h–090Fh). Its I²C interface supports High-Speed mode (3.4 MHz) with Schmitt-trigger inputs and slope-controlled outputs to suppress ground bounce.
Write protection is configurable via a lockable Configuration register that enables either hardware-based full-array protection (via WP pin) or software-defined per-zone protection across eight independent 128-Kbit blocks. Built-in ECC corrects single-bit errors within any four-byte readout and latches error occurrence status in the Configuration register's Error Correction State (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 - enables efficient bulk parameter storage without page-boundary management overhead |
| I²C Speed Support | Up to 3.4 MHz (High-Speed mode), plus 1 MHz / 400 kHz / 100 kHz - ensures compatibility with modern microcontrollers while maintaining backward support |
| Write Cycle Time | ≤5 ms maximum (self-timed) - defines minimum inter-write interval; no external timing control required |
| Operating Voltage | 1.7V to 5.5V - supports direct interfacing with 1.8V, 3.3V, and 5V logic domains without level shifters |
| Temperature Range | −40°C to +85°C (Industrial grade) - validated for under-hood and dashboard-mounted automotive electronics |
| Data Retention | >200 years at 55°C - guarantees long-term integrity of calibration data across vehicle lifetime |
| Endurance | 1,000,000 erase/write cycles - sufficient for frequent runtime parameter logging in telematics units |
Pinout & Package
24CSM01-I/MS is supplied in an 8-Lead MSOP package (3.0 mm × 4.9 mm, 0.65 mm pitch), with exposed pad optionally connected to VSS for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| NC | No Connect | Unbonded pin; must be left floating or tied to VSS - no electrical function or internal connection |
| A1, A2 | Hardware Address Inputs | Set two LSBs of 7-bit I²C client address; enable up to four devices on same bus when hardwired to VCC/VSS |
| VSS | Ground Reference | Primary return path for all internal circuitry and I/O leakage; requires low-impedance connection to system GND plane |
| SDA | Serial Data Line | Open-drain bidirectional I²C data line; requires external pull-up resistor (330 Ω for 3.4 MHz, 2 kΩ for 1 MHz) |
| SCL | Serial Clock Input | Input-only I²C clock line; drives internal timing for read/write operations and ACK/NACK sampling |
| WP | Write-Protect Control | Active-high hardware lock: tied to VCC disables all writes to main array and security register; ignored in Enhanced Software Write Protection mode |
| VCC | Power Supply | Single-supply input supporting 1.7V–5.5V; powers EEPROM core, I²C interface, and ECC logic |
Key Features
| Feature | Design Value |
|---|---|
| Factory-Programmed 128-bit Serial Number | Globally unique identifier preloaded in read-only memory (0800h–080Fh); eliminates manufacturing serialization effort and enables device-level traceability |
| User-Programmable & Lockable ID Page | 256-byte EEPROM section (0900h–090Fh) that can be permanently write-locked via software sequence - ideal for storing immutable cryptographic keys or calibration certificates |
| Per-Zone Software Write Protection | Configuration register allows independent locking of eight 128-Kbit memory zones; enables selective protection of critical firmware parameters while allowing runtime updates to non-critical fields |
| Built-In Single-Bit ECC with ECS Latch | Corrects one flipped bit per 4-byte read; Error Correction State (ECS) bit in Configuration register indicates correction event - provides field-detectable reliability monitoring |
| I²C Manufacturer ID Register | 24-bit read-only register returning device-specific value compliant with I²C Manufacturer ID protocol - enables automatic identification and firmware version validation during boot |
Applications
| Automotive Body Control Module | Industrial PLC Configuration Storage |
|---|---|
Use Scenario: Storing door lock actuator calibration profiles, seat position presets, and mirror angle offsets across vehicle lifecycle. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with AEC-Q100 qualification and >200-year data retention - serves as trusted parameter vault during ignition cycles and ECU resets. Use Value: Eliminates need for external serialization hardware; 128-bit serial number enables secure over-the-air update binding to specific ECUs. |
Use Scenario: Holding I/O mapping tables, PID tuning constants, and safety-critical trip thresholds in modular automation controllers. IC Role / Device Role / Timing Role: Industrial-grade EEPROM with −40°C to +85°C operation and 1M-cycle endurance - withstands repeated firmware reconfiguration in factory-floor environments. Use Value: Per-zone software write protection prevents accidental overwrite of safety-critical registers during routine maintenance downloads. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Flags |
Use Scenario: Archiving flow-rate calibration coefficients, dose history logs, and regulatory audit trails in Class II medical devices. IC Role / Device Role / Timing Role: Secure, ECC-protected memory with lockable ID page - stores FDA-mandated calibration signatures and timestamped event records. Use Value: Factory-programmed serial number satisfies UDI requirements; built-in ECC ensures data integrity compliance per IEC 62304. |
Use Scenario: Maintaining tariff schedule versions, metering algorithm flags, and tamper-detection counters in ANSI C12.20-certified meters. IC Role / Device Role / Timing Role: High-reliability EEPROM with 3.4 MHz I²C interface - enables fast parameter loading during power-up and firmware updates over HAN networks. Use Value: Hardware WP pin provides fail-safe protection against corruption during brown-out events; 1.7V min VCC supports battery-backed operation. |
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 (Microchip) | 128-Kbit capacity, no security register, no ECC, 1 MHz max I²C speed | Lacks 128-bit serial number, per-zone protection, and ECC - suitable only for basic parameter storage without traceability or reliability monitoring | Select when cost sensitivity outweighs security and longevity requirements; not AEC-Q100 qualified |
| BR24G128FJ-WE2 (Rohm) | 128-Kbit, 1.7V–5.5V, I²C up to 1 MHz, includes 64-byte ID area but no factory serial number or ECC | Provides basic write protection and low-voltage operation but no globally unique identifier or error correction - insufficient for automotive or medical traceability | Choose for consumer-grade designs where AEC-Q100 and ECC are unnecessary; pin-compatible in SOIC-8 but not functionally equivalent |
Compared with AT24CS128-SSHL-T and BR24G128FJ-WE2, the 24CSM01-I/MS delivers 8× memory density, AEC-Q100 qualification, factory-serialized identity, and ECC-based reliability assurance - making it uniquely suited for safety-critical and regulatory-compliant applications where data integrity and device authenticity are mandatory.
Availability
24CSM01-I/MS is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLCs, and medical infusion pumps requiring stable component supply with guaranteed long-term availability and full traceability.
Supply support for 24CSM01-I/MS 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 development tools.
The 24CSM01 belongs to Microchip's CS-series serial EEPROM family, designed specifically for automotive and industrial applications demanding AEC-Q100 qualification, extended temperature operation, and advanced data security features including factory serialization and ECC.
FAQ
What is the operating voltage range of the 24CSM01-I/MS?
The 24CSM01-I/MS operates from 1.7V to 5.5V, enabling direct integration with 1.8V, 3.3V, and 5V microcontroller I²C buses without level-shifting circuitry. This wide range supports battery-backed operation down to 1.7V and ensures robustness across varying power rail conditions in automotive and industrial environments. The 24CSM01-I/MS maintains full I²C functionality-including 3.4 MHz High-Speed mode-at VCC ≥2.5V.
Does the 24CSM01-I/MS support AEC-Q100 qualification?
Yes, the 24CSM01-I/MS is AEC-Q100 qualified for automotive applications, meeting stress test requirements for temperature cycling, humidity bias, and ESD robustness. This qualification covers the Industrial temperature grade (−40°C to +85°C) and validates its use in body control modules, infotainment systems, and ADAS subsystems where reliability under harsh environmental conditions is mandatory. The 24CSM01-I/MS datasheet explicitly states AEC-Q100 compliance in its feature summary.
How does the security register in the 24CSM01-I/MS work?
The 24CSM01-I/MS security register is a 4-Kbit dedicated area split into two sections: a read-only 128-bit factory-programmed serial number (0800h–080Fh) and a user-programmable 256-byte ID page (0900h–090Fh) that can be permanently locked via software command. Access requires distinct device address byte patterns (1011xxxx) and proper termination of prior EEPROM transactions with a Stop condition. The 24CSM01-I/MS uses this structure to provide immutable device identity and secure storage for cryptographic keys or calibration certificates.
What write protection options does the 24CSM01-I/MS offer?
The 24CSM01-I/MS offers dual write protection modes: hardware-based full-array protection via the WP pin (tied to VCC), and enhanced software-defined protection using the lockable Configuration register to independently secure any of eight 128-Kbit memory zones. The Configuration register itself can be permanently locked after setup, preventing further changes to protection behavior. This flexibility allows the 24CSM01-I/MS to safeguard critical firmware parameters while permitting runtime updates to non-critical configuration fields.
Is ECC functionality enabled by default in the 24CSM01-I/MS?
Yes, ECC is always active in the 24CSM01-I/MS and requires no configuration. It automatically corrects single-bit errors within any four-byte readout from the main EEPROM array. The Configuration register includes a read-only Error Correction State (ECS) latch that is set whenever ECC correction occurs - providing observable evidence of memory integrity events. This built-in ECC enhances reliability beyond standard EEPROM specifications and is integral to the 24CSM01-I/MS's >200-year data retention claim.
24CSM01-I/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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-MSOP
24CSM01-I/MS FAQ
1.How can I place an order for 24CSM01-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 24CSM01-I/MS 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/MS reliable?
The price and inventory of 24CSM01-I/MS 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/MS is usually 5 days.
3.What payment methods are accepted for 24CSM01-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24CSM01-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24CSM01-I/MS?
24CSM01-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24CSM01-I/MS 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/MS?
For technical support, including 24CSM01-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24CSM01-I/MS requirements.
6.How does Aetrix verify that 24CSM01-I/MS is sourced from the original manufacturer or authorized distributors?
All 24CSM01-I/MS 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/MS meets industry standards.
7.What is the process for return or replacement of 24CSM01-I/MS?
All 24CSM01-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 24CSM01-I/MS, 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/MS part is unused and in its original packaging.
Return procedure for 24CSM01-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24CSM01-I/MS Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
