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Microchip Technology 24LC01BHT-I/OT
- Part No.:
- 24LC01BHT-I/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SC-74A, SOT-753
- Datasheet:
-
24LC01BHT-I/OT.pdf
- Description:
- IC EEPROM 1KBIT I2C SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,987
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Product details
Overview
24LC01BHT-I/OT from Microchip Technology Inc. is a 1 Kbit I²C-compatible serial EEPROM organized as 128 × 8-bit memory, operating from 2.5V to 5.5V with industrial temperature range (−40°C to +85°C), 400 kHz max clock frequency, and hardware write-protect for addresses 40h–7Fh. It supports byte/page writes (up to 8 bytes), delivers ≤1 mA read current and ≤1 μA standby current, and is packaged in 5-lead SOT-23 (tape-and-reel).
For engineers reviewing the 24LC01BHT-I/OT datasheet, 24LC01BHT-I/OT pinout, 24LC01BHT-I/OT application, or 24LC01BHT-I/OT equivalent, this page provides verified electrical parameters, validated SOT-23 pin mapping, confirmed half-array write-protection behavior, and real-world use cases in embedded configuration storage, sensor calibration retention, and firmware parameter backup.
Technical Context
The 24LC01BHT-I/OT implements a true 2-wire I²C interface with Schmitt-trigger inputs on SDA/SCL for noise immunity and slope-controlled outputs to suppress ground bounce. Its internal address counter enables current-address, random, and sequential read modes without external addressing logic.
Write protection is implemented via the WP pin: tied to VCC, it disables writes to the upper half (40h–7Fh); tied to VSS, full array access is enabled. The device uses an internal high-voltage generator for EEPROM programming and includes VCC threshold detection to inhibit writes below 1.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Kbit (128 × 8-bit) - sufficient for small configuration tables, calibration coefficients, or boot parameters in space-constrained designs. |
| Supply Voltage Range | 2.5V to 5.5V - compatible with 3.3V and 5V systems; not operable below 2.5V (unlike 24AA01H variant). |
| Max Clock Frequency | 400 kHz (≥2.5V) - enables fast I²C transfers; drops to 100 kHz only if VCC <2.5V (not applicable here). |
| Write Cycle Time | 5 ms max (byte or page) - defines minimum inter-write interval; typical page write time is 3 ms. |
| Endurance | 1 million erase/write cycles - supports frequent field updates such as logging or runtime tuning. |
| Data Retention | 200 years - ensures long-term reliability of stored settings across product lifetime without refresh. |
| Operating Temperature | −40°C to +85°C (Industrial grade) - qualified for deployment in industrial controls, automotive body electronics, and outdoor equipment. |
Pinout & Package
24LC01BHT-I/OT is housed in a 5-lead SOT-23 package (JEDEC MO-178AA), footprint-optimized for high-density PCBs. Pin 1 is SCL; Pin 2 is VSS; Pin 3 is SDA; Pin 4 is VCC; Pin 5 is WP. A0, A1, and A2 are not connected internally and must be left floating or tied to VSS/VCC per board layout requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCL (Pin 1) | Serial Clock Input | Synchronizes all I²C transactions; requires external pull-up; Schmitt-triggered for noise margin. |
| VSS (Pin 2) | Ground Reference | System return path for all internal circuitry and I/O; must be low-impedance connection. |
| SDA (Pin 3) | Bidirectional Data I/O | Open-drain bus line requiring external pull-up; changes only during SCL low except for Start/Stop conditions. |
| VCC (Pin 4) | Power Supply | 2.5V–5.5V input; powers EEPROM array, control logic, and HV generator; decoupling capacitor required. |
| WP (Pin 5) | Hardware Write-Protect | Logic-high disables writes to upper half (40h–7Fh); logic-low enables full-array write access. |
Key Features
| Feature | Design Value |
|---|---|
| I²C Bus Compatibility | Fully compliant with standard-mode (100 kHz) and fast-mode (400 kHz) I²C specifications - interoperable with microcontrollers, SoCs, and PMICs using standard I²C drivers. |
| Half-Array Hardware Write-Protect | WP pin physically disables writes to 64 bytes (40h–7Fh) while allowing reads - protects critical firmware or calibration data from accidental overwrite. |
| Low-Power Operation | 1 μA max standby current and 1 mA max active read current - extends battery life in portable and energy-harvesting applications. |
| Noise Immunity | Schmitt-trigger inputs + 50 ns input filter spike suppression on SDA/SCL - ensures robust communication in electrically noisy environments (e.g., motor drives, power supplies). |
| Page Write Capability | Up to 8-byte burst writes within a single physical page (00h–07h, 08h–0Fh, etc.) - reduces I²C transaction overhead versus individual byte writes. |
Applications
| Embedded Configuration Storage | Sensor Calibration Retention |
|---|---|
Use Scenario: Storing user-configurable settings (e.g., display brightness, network timeout, language selection) in a smart thermostat or industrial HMI. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed at power-up and during runtime via I²C by host MCU. Use Value: Enables state persistence across power cycles without external backup power or larger memory; 1 Kbit capacity matches typical UI config footprints. |
Use Scenario: Saving factory-trimmed offset/gain coefficients for analog sensors (e.g., pressure, temperature) in automotive cabin modules. IC Role / Device Role / Timing Role: Factory-programmed data repository read once at system initialization to calibrate ADC readings. Use Value: Eliminates need for trimming resistors or OTP fuses; 200-year data retention guarantees accuracy over vehicle lifetime. |
| Firmware Parameter Backup | Secure Boot Key Storage |
Use Scenario: Backing up runtime-modified firmware parameters (e.g., PID loop gains, fault thresholds) in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Write-once-or-rarely EEPROM used during maintenance mode to preserve operational tuning data. Use Value: Survives firmware updates and resets; 1M endurance supports hundreds of field reconfigurations over 10+ years. |
Use Scenario: Storing cryptographic keys or secure boot seeds in medical devices where tamper resistance is required but dedicated secure elements are cost-prohibitive. IC Role / Device Role / Timing Role: Read-only key store accessed early in boot sequence; WP pin permanently tied to VCC to prevent modification. Use Value: Provides basic hardware-enforced write protection for sensitive data; avoids software-only key management vulnerabilities. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA01HT-I/OT | Lower VCC min (1.7V), same 1 Kbit density and SOT-23 package; shares identical pinout and I²C timing. | Required in 1.8V or battery-powered systems where 2.5V operation is not guaranteed. | Select 24AA01HT-I/OT only when supply voltage may dip below 2.5V; otherwise, 24LC01BHT-I/OT offers tighter VCC specification and broader vendor stock. |
| AT24C01D-SSHM-T | Same 1 Kbit, 5-lead SOT-23, I²C-compatible; rated for −40°C to +85°C; max clock 1 MHz (but typically used at 400 kHz). | Offers higher max clock and slightly lower standby current (0.5 μA); lacks hardware half-array write-protect (only full-array WP). | Choose AT24C01D-SSHM-T when higher-speed I²C or ultra-low quiescent current is prioritized over selective write protection. |
Compared with 24AA01HT-I/OT and AT24C01D-SSHM-T, the 24LC01BHT-I/OT provides optimal balance of industrial-grade reliability, deterministic 2.5V–5.5V operation, and hardware-enforced partial write protection-making it preferred for cost-sensitive, voltage-stable embedded systems requiring robust configuration storage.
Availability
24LC01BHT-I/OT is available at Aetrix Electronics and suitable for embedded configuration storage, sensor calibration retention, and firmware parameter backup requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 24LC01BHT-I/OT 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, mixed-signal, analog, and Flash-IP solutions, serving industrial, automotive, consumer, and communications markets with high-reliability silicon and development tools.
The 24LC01BHT-I/OT belongs to Microchip's 24LCxxB serial EEPROM family, designed specifically for low-voltage, low-power I²C-based nonvolatile data storage in space- and cost-constrained embedded systems.
FAQ
What is the minimum supply voltage required for reliable operation of the 24LC01BHT-I/OT?
The 24LC01BHT-I/OT requires a minimum supply voltage of 2.5V for guaranteed operation across its full industrial temperature range (−40°C to +85°C). Unlike the 24AA01H variant, it is not specified for operation below 2.5V. Attempting to power the 24LC01BHT-I/OT below this threshold may result in undefined behavior, failed writes, or incomplete acknowledgments on the I²C bus.
How does the WP pin function on the 24LC01BHT-I/OT, and what memory region does it protect?
On the 24LC01BHT-I/OT, the WP pin enables hardware write-protection: when tied to VCC, writes to memory addresses 40h through 7Fh (64 bytes, upper half of the 128-byte array) are inhibited, while reads remain fully functional. When WP is tied to VSS or left floating, full-array write access is enabled. This feature is implemented entirely in hardware and requires no firmware intervention.
What is the maximum number of bytes that can be written in a single page write operation for the 24LC01BHT-I/OT?
The 24LC01BHT-I/OT supports page writes of up to 8 bytes per operation, constrained by its internal page buffer size. Page boundaries align to 8-byte intervals (e.g., 00h–07h, 08h–0Fh). Attempting to write across a boundary causes wraparound within the current page-not advancement to the next-so software must enforce alignment to avoid unintended overwrites.
Does the 24LC01BHT-I/OT support both standard-mode and fast-mode I²C communication?
Yes, the 24LC01BHT-I/OT supports both standard-mode (100 kHz) and fast-mode (400 kHz) I²C communication. Its maximum clock frequency is 400 kHz when VCC is ≥2.5V-its guaranteed operating minimum-making it compatible with most modern microcontrollers' I²C peripherals without speed negotiation.
What is the endurance rating and data retention specification for the 24LC01BHT-I/OT?
The 24LC01BHT-I/OT is rated for more than 1 million erase/write cycles and guarantees data retention exceeding 200 years at +85°C ambient temperature. These specifications are characterized and ensured per Microchip's qualification standards, enabling long-life deployments in industrial and automotive applications without periodic data refresh.
24LC01BHT-I/OT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- 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:
- 900 ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
24LC01BHT-I/OT FAQ
1.How can I place an order for 24LC01BHT-I/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC01BHT-I/OT 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 24LC01BHT-I/OT reliable?
The price and inventory of 24LC01BHT-I/OT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC01BHT-I/OT is usually 5 days.
3.What payment methods are accepted for 24LC01BHT-I/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC01BHT-I/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC01BHT-I/OT?
24LC01BHT-I/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC01BHT-I/OT 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 24LC01BHT-I/OT?
For technical support, including 24LC01BHT-I/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC01BHT-I/OT requirements.
6.How does Aetrix verify that 24LC01BHT-I/OT is sourced from the original manufacturer or authorized distributors?
All 24LC01BHT-I/OT 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 24LC01BHT-I/OT meets industry standards.
7.What is the process for return or replacement of 24LC01BHT-I/OT?
All 24LC01BHT-I/OT units undergo pre-shipment inspection (PSI). If there is an issue with 24LC01BHT-I/OT, 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 24LC01BHT-I/OT part is unused and in its original packaging.
Return procedure for 24LC01BHT-I/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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