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Microchip Technology 24LC01B/ST
- Part No.:
- 24LC01B/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC01B/ST.pdf
- Description:
- IC EEPROM 1KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,516
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Product details
Overview
24LC01B/ST 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 at 2.5–5.5 V, and industrial/extended temperature support (–40°C to +125°C). It features 8-byte page write buffer, Schmitt-trigger inputs, and <1 µA standby current - used for parameter storage in embedded controllers and sensor calibration modules.
For engineers reviewing the 24LC01B/ST datasheet, 24LC01B/ST pinout, 24LC01B/ST application, or 24LC01B/ST equivalent, this page delivers verified electrical specs, package-confirmed pin functions, real-world use cases, and two validated alternative parts with documented functional and application-level differences.
Technical Context
The 24LC01B/ST operates as an I²C slave device with fixed 7-bit client address (1010xxx) and R/W bit control. Its internal Address Pointer auto-increments during sequential reads and supports byte/page writes with self-timed erase/write cycles up to 5 ms.
It implements noise suppression via Schmitt-trigger inputs on SDA/SCL and output slope control to prevent ground bounce. Write protection is enforced by the WP pin state (VCC = full-array lock, VSS = enabled), independent of I²C command execution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Kbit (128 × 8-bit), sufficient for small configuration tables or calibration coefficients in space-constrained designs. |
| VCC Range | 2.5 V to 5.5 V - requires minimum 2.5 V supply; not operable below threshold, unlike 24AA01. |
| Max Clock Frequency | 400 kHz at VCC ≥ 2.5 V - limits bus throughput but ensures compatibility with legacy I²C masters. |
| Page Write Buffer | 8 bytes - enables efficient burst writes within one physical page boundary without host-side address management. |
| Write Endurance | 1,000,000 cycles - supports frequent recalibration or logging in industrial monitoring systems. |
| Data Retention | 200 years - guarantees long-term integrity of stored firmware parameters or device IDs across product lifecycle. |
| Standby Current | 1 µA (I-temp), 5 µA (E-temp) - enables ultra-low-power operation in battery-backed or energy-harvesting applications. |
Pinout & Package
24LC01B/ST is available in multiple 8-lead packages including SOIC (ST), MSOP, TSSOP, DFN, and PDIP, all sharing identical pin mapping. The /ST suffix denotes SOIC-8 (3.9 mm body width) per Microchip's standard marking convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | Address Inputs | No internal connection; may be left floating or tied to VSS/VCC - no effect on device addressing or operation. |
| VSS | Ground Reference | Primary return path for all internal circuitry; must be low-impedance to ensure stable logic thresholds and noise immunity. |
| SDA | Serial Data I/O | Open-drain bidirectional bus line requiring external pull-up (2 kΩ typical for 400 kHz); changes only during SCL low to avoid false Start/Stop detection. |
| SCL | Serial Clock Input | Master-generated synchronous signal; rising edge samples data, falling edge allows data change - defines timing window for valid data setup/hold. |
| WP | Write-Protect Control | Logic-high (VCC) disables all write operations to entire memory array (00h–7Fh); read access remains fully functional. |
| VCC | Power Supply | Supplies core logic and EEPROM array; must remain stable during write cycles to prevent corruption - decoupling capacitor required. |
Key Features
| Feature | Design Value |
|---|---|
| I²C Bus Compatibility | Fully compliant with standard-mode (100 kHz) and fast-mode (400 kHz) I²C protocol - interoperable with microcontrollers, PMICs, and SoCs using standard I²C drivers. |
| Hardware Write Protection | Dedicated WP pin provides non-volatile, pin-level lockout - eliminates risk of accidental overwrites during firmware updates or field service. |
| Noise Immunity | Schmitt-trigger inputs and 50 ns input filter suppress bus transients - maintains reliable communication in electrically noisy environments like motor drives or power supplies. |
| Page Write Efficiency | 8-byte buffer reduces I²C transaction count by up to 8× versus byte writes - lowers bus occupancy and host CPU overhead in high-frequency update scenarios. |
| Extended Temperature Support | Rated for –40°C to +125°C operation - suitable for under-hood automotive modules, industrial PLCs, and outdoor IoT gateways. |
Applications
| Industrial Sensor Calibration | Embedded System 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 parameter storage accessed during power-on initialization via I²C; WP pin held high after calibration to prevent runtime corruption. Use Value: Eliminates need for external trimming components and enables field recalibration without hardware modification. | Use Scenario: Holding user-defined settings (e.g., display brightness, network timeout) in medical handheld devices with infrequent updates. IC Role / Device Role / Timing Role: Low-power I²C slave storing persistent configuration; accessed only during boot or menu navigation - minimal bus activity. Use Value: Enables retention across battery swaps and cold starts while consuming <1 µA in standby - extends operational life. |
| Automotive Body Control Module | Smart Meter Firmware Parameters |
Use Scenario: Saving seat/mirror position memory and lighting profiles in AEC-Q100 qualified vehicle subsystems. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 qualified EEPROM interfacing with MCU over I²C; WP tied to VSS during programming, VCC during normal operation. Use Value: Meets automotive reliability requirements (1M write cycles, 200-year retention) and prevents unintended writes during EMI events. | Use Scenario: Storing tariff schedules, meter ID, and security keys in utility-grade electricity meters deployed for >10 years. IC Role / Device Role / Timing Role: Tamper-resistant nonvolatile memory with hardware write-lock; accessed during firmware upgrade or commissioning via isolated I²C interface. Use Value: Ensures regulatory compliance through guaranteed data integrity and resistance to voltage glitch attacks. |
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/P | Wider VCC range (1.7–5.5 V); supports 100 kHz at <2.5 V; same 1 Kbit density and pinout. | Enables single-supply designs down to 1.7 V (e.g., coin-cell powered sensors); lacks AEC-Q100 qualification. | Select when ultra-low-voltage operation is required and automotive qualification is unnecessary. |
| AT24C01D-SSHM-T | Same 1 Kbit size, 2.5–5.5 V range, and 400 kHz speed; offers enhanced ESD rating (>6 kV HBM) and tighter AC timing specs. | Better suited for high-noise industrial automation where robustness exceeds Microchip's 4 kV spec; identical I²C protocol stack. | Choose for mission-critical systems demanding higher ESD immunity and marginally faster timing margins. |
Compared with 24LC01B/ST, 24AA01-I/P enables lower-voltage operation but sacrifices automotive qualification, while AT24C01D-SSHM-T improves ESD resilience and timing consistency at equivalent cost - both require no PCB changes but differ in qualification scope and voltage flexibility.
Availability
24LC01B/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system configuration, automotive body control modules, and smart meter firmware parameter storage requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 24LC01B/ST 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 company specializing in microcontrollers, analog devices, and memory solutions, with global manufacturing and quality certifications.
The 24LC01B belongs to Microchip's 24XX01 family of I²C serial EEPROMs designed for reliable, low-power nonvolatile data storage in resource-constrained embedded systems across industrial, automotive, and consumer applications.
FAQ
What is the minimum operating voltage for the 24LC01B/ST?
The 24LC01B/ST requires a minimum VCC of 2.5 V and operates up to 5.5 V. Unlike the 24AA01 variant, it is not specified for operation below 2.5 V - attempting to power it at 1.8 V will result in undefined behavior or failure to respond on the I²C bus.
Does the 24LC01B/ST support page write operations, and what is the buffer size?
Yes, the 24LC01B/ST supports page write operations with an 8-byte internal buffer. This allows up to 8 sequential bytes to be written in a single I²C transaction, reducing bus overhead compared to individual byte writes - critical for efficient firmware parameter updates.
How does the WP pin function on the 24LC01B/ST?
When the WP pin of the 24LC01B/ST is tied to VCC, the entire memory array (addresses 00h–7Fh) becomes write-protected - all write commands are ignored, though read operations continue normally. Tying WP to VSS enables full read/write functionality.
Is the 24LC01B/ST AEC-Q100 qualified, and for which grade?
Yes, the 24LC01B/ST is AEC-Q100 qualified for Grade 1 (–40°C to +125°C), making it suitable for automotive body electronics, infotainment interfaces, and other under-hood or cabin applications requiring automotive-grade reliability and stress testing.
What packages are available for the 24LC01B/ST, and what does the '/ST' suffix indicate?
The '/ST' suffix in 24LC01B/ST explicitly denotes the 8-lead SOIC package (3.9 mm body width, JEDEC MS-012). Other available packages include PDIP, TSSOP, MSOP, DFN, and SC-70 - all share identical pinout and electrical behavior, but '/ST' refers solely to SOIC-8.
24LC01B/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24LC01B/ST FAQ
1.How can I place an order for 24LC01B/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC01B/ST 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/ST reliable?
The price and inventory of 24LC01B/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC01B/ST is usually 5 days.
3.What payment methods are accepted for 24LC01B/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC01B/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC01B/ST?
24LC01B/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC01B/ST 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/ST?
For technical support, including 24LC01B/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC01B/ST requirements.
6.How does Aetrix verify that 24LC01B/ST is sourced from the original manufacturer or authorized distributors?
All 24LC01B/ST 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/ST meets industry standards.
7.What is the process for return or replacement of 24LC01B/ST?
All 24LC01B/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC01B/ST, 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/ST part is unused and in its original packaging.
Return procedure for 24LC01B/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC01B/ST Tags
-
M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
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