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Microchip Technology 24LC01B-I/SNG
- Part No.:
- 24LC01B-I/SNG
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24LC01B-I/SNG.pdf
- Description:
- IC EEPROM 1KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,532
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Product details
Overview
24LC01B-I/SNG 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 temperature range (−40°C to +85°C). It supports page writes up to 8 bytes and delivers ≤1 µA standby current for low-power embedded systems such as sensor nodes and power management modules.
For engineers reviewing the 24LC01B-I/SNG datasheet, 24LC01B-I/SNG pinout, 24LC01B-I/SNG application, or 24LC01B-I/SNG equivalent, key selection criteria include its 2.5V minimum operating voltage, Schmitt-triggered I²C inputs for noise immunity, 5 ms max write cycle time, and compatibility with standard I²C host controllers in space-constrained designs.
Technical Context
The 24LC01B-I/SNG implements a 2-wire I²C interface with fixed 7-bit device address (1010xxx) and R/W bit control. Its internal architecture includes an 8-byte page latch, HV generator for EEPROM programming, and address pointer that auto-increments during sequential reads.
It uses open-drain SDA/SCL with external pull-up resistors, supports Start/Stop condition detection, and incorporates Schmitt-trigger inputs plus output slope control to suppress ground bounce and bus noise - enabling reliable operation in electrically noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Kbit (128 × 8-bit), sufficient for calibration data, configuration registers, or small firmware patches in microcontroller-based systems. |
| VCC Range | 2.5 V to 5.5 V - requires stable supply above 2.5 V; not compatible with sub-2.5 V logic domains without level shifting. |
| Max Clock Frequency | 400 kHz at VCC ≥ 2.5 V - supports standard-mode I²C timing; not rated for fast-mode (1 MHz) operation. |
| Write Cycle Time | ≤5 ms per byte or page - imposes minimum delay between successive write commands; ACK polling required for precise timing control. |
| Endurance | 1,000,000 erase/write cycles - suitable for applications requiring frequent parameter updates, such as energy metering or industrial logging. |
| Data Retention | >200 years at +25°C - ensures long-term storage integrity for factory-programmed identifiers or security keys. |
| ESD Protection | >4,000 V HBM - provides robust handling margin during PCB assembly and field service. |
Pinout & Package
24LC01B-I/SNG is supplied in an 8-lead SOIC package (SNG suffix per Microchip's packaging nomenclature). Pin 1 is A0 (NC), Pin 2 is A1 (NC), Pin 3 is A2 (NC), Pin 4 is VSS (ground reference), Pin 5 is SDA (bidirectional open-drain I²C data line), Pin 6 is SCL (input-only I²C clock), Pin 7 is WP (hardware write-protect input), and Pin 8 is VCC (power supply).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | No-connect (NC) | Internally unconnected; may be left floating or tied to VSS/VCC without functional impact - simplifies board layout and eliminates address conflict concerns. |
| VSS | Ground reference | Must be connected to system ground plane; serves as return path for all internal logic and EEPROM programming currents. |
| SDA | Bidirectional I²C data line | Open-drain output requiring external pull-up resistor (2 kΩ typical for 400 kHz); changes only during SCL low to avoid spurious Start/Stop conditions. |
| SCL | I²C clock input | Driven solely by host controller; must meet tHIGH/tLOW timing requirements (≥600 ns high, ≥1300 ns low at 400 kHz). |
| WP | Write-protect enable | Tie to VCC to disable all writes (read-only mode); tie to VSS to enable full read/write access - enables secure boot or field-upgrade lockout. |
| VCC | Power supply | Supplies core logic and EEPROM programming voltage; bypass capacitor (0.1 µF ceramic) recommended adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Write-Protection | Physical WP pin enables irreversible lock of entire memory array (00h–7Fh) - prevents accidental or malicious firmware corruption during system operation. |
| Schmitt Trigger Inputs | Input hysteresis ≥0.05×VCC on SDA/SCL - rejects noise spikes up to 50 ns duration and improves signal integrity on long or unterminated I²C buses. |
| Page Write Buffer | 8-byte internal latch allows burst programming of contiguous addresses - reduces host I²C transaction overhead and accelerates multi-byte configuration writes. |
| Low Standby Current | ≤1 µA at I-temp - extends battery life in always-on IoT edge devices where EEPROM remains powered but idle for extended periods. |
| I²C Bus Compatibility | Fully compliant with Philips I²C specification (100/400 kHz modes) - interoperable with ARM Cortex-M, PIC, AVR, and Linux I²C drivers without protocol translation. |
Applications
| Industrial Sensor Calibration | Smart Meter Configuration Storage |
|---|---|
Use Scenario: Storing factory-trimmed ADC offset/gain coefficients and temperature compensation tables in environmental monitoring sensors. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed during power-up initialization and periodic self-calibration routines. Use Value: Enables single-batch calibration across production lines while preserving unique sensor parameters without requiring external MCU flash allocation. | Use Scenario: Holding tariff schedules, billing counters, and communication module settings in utility-grade electricity meters. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory for regulatory-critical data updated infrequently but requiring guaranteed retention over 10+ years. Use Value: Meets IEC 62056 compliance for data integrity via hardware WP pin and >200-year data retention specification. |
| Embedded System Bootloader Parameters | Medical Device Usage Logs |
Use Scenario: Recording bootloader version, secure boot status flags, and last-known-good firmware hash in diagnostic medical equipment. IC Role / Device Role / Timing Role: Critical startup-time configuration register accessed before main application execution begins. Use Value: Provides deterministic recovery path after failed OTA update by preserving rollback metadata independent of main MCU flash wear. | Use Scenario: Logging sterilization cycles, operator IDs, and error events in portable infusion pumps and ventilators. IC Role / Device Role / Timing Role: High-reliability event recorder with guaranteed write endurance under repeated power-loss conditions. Use Value: Achieves 1M write cycles and 5 ms max write time - supports real-time logging at 200 Hz without data loss during brownout events. |
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/SN | Wider VCC range (1.7–5.5 V); supports 100 kHz at 1.7–2.5 V; same 1 Kbit density and SOIC-8 package. | Enables direct use in 1.8 V systems without level shifters; lower voltage headroom increases susceptibility to brownout-induced write failure. | Select when operating below 2.5 V or needing backward compatibility with legacy 1.8 V platforms. |
| AT24C01C-SSHM-T | Same 1 Kbit size, SOIC-8, and I²C interface; rated for 1.7–5.5 V and 1 MHz clock; AEC-Q100 Grade 2 qualified. | Offers automotive-grade reliability and faster timing but lacks explicit ESD rating >4 kV in published specs. | Prefer for automotive body electronics where AEC-Q100 qualification is mandatory and 1 MHz throughput is beneficial. |
Compared with 24LC01B-I/SNG, the 24AA01-I/SN extends low-voltage operation at the cost of reduced noise margin, while AT24C01C-SSHM-T adds automotive qualification and speed but omits the documented 4 kV ESD rating - making 24LC01B-I/SNG optimal for industrial I²C peripherals requiring proven robustness in noisy environments.
Availability
24LC01B-I/SNG is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter configuration storage, and embedded system bootloader parameter retention requiring stable component supply across multi-year production cycles.
Supply support for 24LC01B-I/SNG 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 nonvolatile memory solutions for industrial, automotive, and consumer markets.
The 24LC01B belongs to Microchip's 24XX01 family of I²C serial EEPROMs designed specifically for space- and power-constrained embedded systems requiring reliable, low-cost, and pin-efficient nonvolatile storage.
FAQ
What is the minimum supply voltage required for reliable operation of the 24LC01B-I/SNG?
The 24LC01B-I/SNG requires a minimum VCC of 2.5 V for guaranteed functionality across its industrial temperature range (−40°C to +85°C). Operation below 2.5 V is not specified and may result in incomplete write cycles or communication failures. This distinguishes it from the 24AA01 variant, which supports down to 1.7 V.
Does the 24LC01B-I/SNG support 1 MHz I²C communication?
No, the 24LC01B-I/SNG is rated for a maximum clock frequency of 400 kHz when VCC is 2.5 V or higher. It does not support fast-mode Plus (1 MHz) I²C operation. For 1 MHz capability, consider the 24FC01 variant or alternative parts like the AT24C01C-SSHM-T.
How many write cycles can the 24LC01B-I/SNG endure before failure?
The 24LC01B-I/SNG guarantees a minimum of 1,000,000 erase/write cycles per memory location under standard conditions (25°C, 5.5 V). This endurance rating applies to both byte and page write operations and is validated per JEDEC standards, making it suitable for applications with frequent parameter updates.
What is the function of the A0, A1, and A2 pins on the 24LC01B-I/SNG?
The A0, A1, and A2 pins on the 24LC01B-I/SNG are not internally connected and serve no functional purpose. They may be left floating or tied to VSS or VCC without affecting device behavior - simplifying PCB routing and eliminating address configuration complexity in single-device I²C implementations.
Can the 24LC01B-I/SNG retain data for more than 10 years without power?
Yes, the 24LC01B-I/SNG specifies data retention exceeding 200 years at +25°C ambient temperature. At elevated temperatures (e.g., +85°C), retention decreases but remains well beyond 10 years - verified through accelerated life testing and widely deployed in infrastructure applications requiring long-term archival integrity.
24LC01B-I/SNG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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-SOIC
24LC01B-I/SNG FAQ
1.How can I place an order for 24LC01B-I/SNG through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC01B-I/SNG 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/SNG reliable?
The price and inventory of 24LC01B-I/SNG 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/SNG is usually 5 days.
3.What payment methods are accepted for 24LC01B-I/SNG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC01B-I/SNG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC01B-I/SNG?
24LC01B-I/SNG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC01B-I/SNG 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/SNG?
For technical support, including 24LC01B-I/SNG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC01B-I/SNG requirements.
6.How does Aetrix verify that 24LC01B-I/SNG is sourced from the original manufacturer or authorized distributors?
All 24LC01B-I/SNG 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/SNG meets industry standards.
7.What is the process for return or replacement of 24LC01B-I/SNG?
All 24LC01B-I/SNG units undergo pre-shipment inspection (PSI). If there is an issue with 24LC01B-I/SNG, 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/SNG part is unused and in its original packaging.
Return procedure for 24LC01B-I/SNG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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