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Microchip Technology 24LC01B-I/MS
- Part No.:
- 24LC01B-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
24LC01B-I/MS.pdf
- Description:
- IC EEPROM 1KBIT I2C 400KHZ 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,028
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Product details
Overview
24LC01B-I/MS from Microchip Technology Inc. is a 1 Kbit I²C-compatible serial EEPROM organized as 128 × 8-bit memory with hardware write-protection, 400 kHz max clock frequency, and industrial temperature range (–40°C to +85°C). It operates from 2.5V to 5.5V, supports 8-byte page writes, and delivers ≤1 µA standby current - ideal for battery-backed configuration storage in embedded controllers and sensor modules.
For engineers reviewing the 24LC01B-I/MS datasheet, 24LC01B-I/MS pinout, 24LC01B-I/MS application, or 24LC01B-I/MS equivalent, key selection criteria include VCC min (2.5V), I²C timing compliance at 400 kHz, WP pin behavior, MSOP-8 package footprint, and endurance (>1 million cycles) under industrial thermal stress.
Technical Context
The 24LC01B-I/MS implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal address pointer enables current-address, random, and sequential read modes without external addressing logic.
Write operations use an 8-byte page buffer with self-timed erase/write cycles (≤5 ms), while hardware write-protection via the WP pin disables all writes when pulled high - independent of I²C command flow or power state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Kbit (128 × 8-bit), sufficient for device calibration data, MAC addresses, or firmware revision flags |
| VCC Range | 2.5V–5.5V - excludes sub-2.5V operation unlike 24AA01/24FC01, requiring compatible supply rails |
| Max Clock Frequency | 400 kHz - defines maximum I²C bus throughput; not rated for 1 MHz mode |
| Page Write Buffer | 8 bytes - limits atomic write bursts; crossing page boundaries (every 8-byte aligned address) causes wraparound |
| Endurance | 1,000,000 erase/write cycles - supports frequent logging or parameter updates over product lifetime |
| Data Retention | >200 years at +85°C - ensures nonvolatile storage integrity across extended field deployment |
| Standby Current | ≤1 µA at I-temp - enables multi-year operation on coin-cell batteries in sleep-mode systems |
Pinout & Package
24LC01B-I/MS is packaged in an 8-lead MSOP (Mini Small Outline Package) with 0.65 mm pitch, 3.0 mm × 3.0 mm body, and exposed pad option (not electrically connected per datasheet). Pin 1 is A0 (NC), pin 4 is VSS, pin 5 is SDA, pin 6 is SCL, pin 7 is WP, and pin 8 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Address Input | No internal connection - may be left floating or tied to VSS/VCC without effect on I²C address (fixed at 1010xxx0/1) |
| A1 | Address Input | No internal connection - same NC status as A0; no impact on device addressing |
| A2 | Address Input | No internal connection - all three address pins are unconnected per datasheet Section 2.1 |
| VSS | Ground Reference | Primary return path for all internal circuitry; must be low-impedance to support noise immunity |
| SDA | Serial Data I/O | Open-drain bidirectional bus line requiring external pull-up (2 kΩ typical for 400 kHz); carries address, data, and ACK/NACK |
| SCL | Serial Clock Input | Input-only clock line synchronized to host controller; determines timing for all I²C transactions |
| WP | Write-Protect Control | Logic-high = full array write-inhibited (00h–7Fh); logic-low = normal read/write access |
| VCC | Power Supply | 2.5V–5.5V supply input; powers EEPROM core, interface logic, and HV generator for write cycles |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt Trigger Inputs | 0.05×VCC hysteresis on SDA/SCL - rejects bus noise up to 50 ns spikes without external filtering |
| Output Slope Control | Controlled rise/fall times - prevents ground bounce during fast transitions, critical in mixed-signal PCBs |
| Hardware Write-Protection | WP pin directly gates internal write enable - immune to software corruption or I²C bus glitches |
| ESD Protection | >4,000 V HBM - withstands handling and board-level ESD events without latch-up or parametric shift |
| I²C Bus Compatibility | Fully compliant with standard-mode (100 kHz) and fast-mode (400 kHz) I²C specifications - interoperable with MCU peripherals |
Applications
| Industrial Sensor Calibration | Consumer Appliance Configuration |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed at power-up via I²C before ADC initialization. Use Value: Eliminates need for external trimming components; enables field recalibration with verified 1M-cycle endurance. | Use Scenario: Retaining user preferences (temperature setpoints, cycle modes) across AC power loss in smart washing machines. IC Role / Device Role / Timing Role: Low-power backup memory holding volatile settings during main power-off intervals. Use Value: ≤1 µA standby current extends coin-cell life beyond 5 years; WP pin prevents accidental overwrite during firmware updates. |
| Medical Device Serial Numbers | Automotive Body Control Module IDs |
Use Scenario: Securely storing unique device identifiers and regulatory compliance codes in Class II medical instruments. IC Role / Device Role / Timing Role: Tamper-resistant identity storage accessed only by authenticated bootloader during boot sequence. Use Value: Hardware WP pin blocks unauthorized writes; >200-year data retention meets FDA long-term traceability requirements. | Use Scenario: Holding vehicle-specific configuration data (door lock logic, mirror fold settings) in automotive BCMs. IC Role / Device Role / Timing Role: AEC-Q100 qualified EEPROM interfacing with CAN-connected microcontroller over I²C. Use Value: Industrial temperature rating (–40°C to +85°C) ensures reliability in under-hood environments; 400 kHz speed supports rapid reprogramming during service. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA01-I/MS | Wider VCC range (1.7V–5.5V); 400 kHz max; same pinout and memory map | Supports lower-voltage systems (e.g., 1.8V logic domains) where 24LC01B-I/MS cannot operate | Select 24AA01-I/MS only if supply voltage drops below 2.5V; otherwise, 24LC01B-I/MS offers identical functionality with tighter VCC spec |
| AT24C01D-SSHM-T | Same 1 Kbit size, 2.5V–5.5V VCC, 400 kHz, MSOP-8; but no WP pin - write protection implemented via software lock bits | Lacks hardware write-protection; requires firmware coordination to prevent accidental writes | Choose AT24C01D-SSHM-T only in designs with robust software control; 24LC01B-I/MS preferred where hardware-level security is mandatory |
Compared with 24AA01-I/MS, the 24LC01B-I/MS trades 1.7V operation for stricter VCC min, simplifying supply design in 3.3V/5V systems; versus AT24C01D-SSHM-T, its dedicated WP pin provides fail-safe write inhibition independent of firmware state.
Availability
24LC01B-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer appliance configuration, medical device serialization, and automotive body control module ID storage requiring stable component supply and guaranteed long-term availability.
Supply support for 24LC01B-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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and memory products, with global manufacturing and quality certifications including ISO 9001 and AEC-Q100.
The 24LC01B belongs to Microchip's legacy 24XX01 EEPROM family designed for cost-sensitive, low-power embedded systems requiring reliable nonvolatile storage with minimal external components and I²C bus compatibility.
FAQ
What is the minimum operating voltage for the 24LC01B-I/MS?
The 24LC01B-I/MS requires a minimum VCC of 2.5V, as specified in the Device Selection Table and Electrical Characteristics section of DS20001711M. Unlike the 24AA01 variant, it is not rated for operation below 2.5V - attempting sub-threshold supply may result in unreliable read/write behavior or failure to acknowledge I²C commands. Always verify regulator output stability within this range.
Does the 24LC01B-I/MS support 1 MHz I²C clock frequency?
No, the 24LC01B-I/MS is rated for a maximum clock frequency of 400 kHz under all valid VCC conditions (2.5V–5.5V). The 1 MHz capability is exclusive to the 24FC01 variant. Using 1 MHz with 24LC01B-I/MS will violate AC timing parameters such as THIGH, TLOW, and TAA, leading to communication failures or corrupted writes.
How does the WP pin function on the 24LC01B-I/MS?
On the 24LC01B-I/MS, the WP (Write-Protect) pin is a logic-level input: when tied to VCC, the entire memory array (addresses 00h–7Fh) is write-inhibited, though reads remain fully functional; when tied to VSS (or left floating, per datasheet), normal read/write operation is enabled. This hardware-level protection operates independently of I²C commands and persists across power cycles.
What is the page size and write time for the 24LC01B-I/MS?
The 24LC01B-I/MS has an 8-byte page buffer and a maximum write cycle time of 5 ms for both byte and page writes. Page writes are limited to addresses within the same 8-byte boundary (e.g., 00h–07h, 08h–0Fh); crossing boundaries wraps data to the start of the page. This constraint must be enforced in firmware to avoid unintended overwrites during multi-byte programming.
Is the 24LC01B-I/MS AEC-Q100 qualified?
Yes, the 24LC01B-I/MS is AEC-Q100 qualified for automotive applications, as confirmed in the Features section of DS20001711M. This qualification covers the Industrial temperature grade (–40°C to +85°C), validating its reliability for use in body control modules, infotainment systems, and other automotive subsystems where extended thermal and lifetime performance is required.
24LC01B-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:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Kbit
- Memory Organization:
- 128 x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 3.5 µs
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
24LC01B-I/MS FAQ
1.How can I place an order for 24LC01B-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC01B-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 24LC01B-I/MS reliable?
The price and inventory of 24LC01B-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 24LC01B-I/MS is usually 5 days.
3.What payment methods are accepted for 24LC01B-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC01B-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC01B-I/MS?
24LC01B-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC01B-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 24LC01B-I/MS?
For technical support, including 24LC01B-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC01B-I/MS requirements.
6.How does Aetrix verify that 24LC01B-I/MS is sourced from the original manufacturer or authorized distributors?
All 24LC01B-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 24LC01B-I/MS meets industry standards.
7.What is the process for return or replacement of 24LC01B-I/MS?
All 24LC01B-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 24LC01B-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 24LC01B-I/MS part is unused and in its original packaging.
Return procedure for 24LC01B-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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