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Microchip Technology 24LC01BHT-E/OT
- Part No.:
- 24LC01BHT-E/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SC-74A, SOT-753
- Datasheet:
-
24LC01BHT-E/OT.pdf
- Description:
- IC EEPROM 1KBIT I2C SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,099
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Product details
Overview
24LC01BHT-E/OT from Microchip Technology Inc. is a 1 Kbit (128 × 8) I²C-compatible serial EEPROM optimized for low-voltage industrial and automotive systems. It operates from 2.5V to 5.5V, supports 400 kHz I²C clock speed, features hardware write-protect for the upper half-array (40h–7Fh), delivers ≤1 μA standby current, and guarantees >1 million erase/write cycles with >200 years data retention. It is used in embedded system configuration storage, sensor calibration data logging, and firmware parameter backup.
For engineers reviewing the 24LC01BHT-E/OT datasheet, 24LC01BHT-E/OT pinout, 24LC01BHT-E/OT application, or 24LC01BHT-E/OT equivalent, this page provides verified electrical parameters, package-specific terminal mapping for the 5-lead SOT-23, real-world use scenarios, and validated alternative parts for design flexibility and supply continuity.
Technical Context
The 24LC01BHT-E/OT implements a true 2-wire I²C slave interface with Schmitt-trigger inputs on SDA and SCL for noise immunity, output slope control to suppress ground bounce, and internal address pointer auto-increment for sequential reads. Its write-protect logic is hardwired to the WP pin: tied high, it disables writes to addresses 40h–7Fh; tied low, full array access is enabled.
It uses CMOS EEPROM technology with an integrated high-voltage generator for byte/page programming. Page write capability supports up to 8 bytes per cycle with typical 3 ms write time, and acknowledge polling is supported to detect write completion without fixed delays. The device includes VCC threshold detection that inhibits writes below ~1.5V to prevent data corruption during brown-out conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Kbit (128 × 8-bit array), organized as single block - enables compact nonvolatile storage for small configuration sets. |
| VCC operating range | 2.5V to 5.5V - compatible with standard 3.3V and 5V logic rails; not rated below 2.5V unlike 24AA01H variants. |
| I²C clock frequency | Up to 400 kHz (at VCC ≥2.5V); 100 kHz only if VCC <2.5V - defines maximum bus throughput and timing margin requirements. |
| Standby current | ≤1 μA at VCC = 5.5V, TA = –40°C to +125°C - critical for battery-backed or energy-harvesting applications requiring ultra-low quiescent power. |
| Write endurance | >1 million erase/write cycles - ensures long-term reliability in field-updatable systems with frequent parameter changes. |
| Data retention | >200 years at +25°C - qualifies for long-lifecycle industrial and automotive deployments without data refresh. |
| Temperature grade | Automotive (E): –40°C to +125°C - validated for under-hood and powertrain control module environments. |
| ESD protection | >4 kV HBM - provides robustness against handling and board-level electrostatic discharge events. |
Pinout & Package
24LC01BHT-E/OT is supplied in a Pb-free, RoHS-compliant 5-lead SOT-23 package (JEDEC MO-178AA). Pin 1 is SCL; Pin 2 is VSS; Pin 3 is SDA; Pin 4 is VCC; Pin 5 is WP. Pins A0–A2 are not connected internally and have no function.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCL (Pin 1) | Serial Clock input | Master-generated synchronous clock; must meet tHIGH/tLOW timing specs (≥600 ns high/low at 400 kHz) for reliable communication. |
| VSS (Pin 2) | Ground reference | Common return path for all internal circuitry and I/O; requires low-impedance connection to system ground plane. |
| SDA (Pin 3) | Bidirectional open-drain data line | Requires external pull-up resistor (2 kΩ typical for 400 kHz); transitions only allowed during SCL low to avoid spurious Start/Stop generation. |
| VCC (Pin 4) | Power supply input | Accepts 2.5V–5.5V; internal voltage detector disables writes if VCC drops below ~1.5V to prevent partial writes. |
| WP (Pin 5) | Hardware write-protect control | Tied to VCC → protects addresses 40h–7Fh; tied to VSS → enables full-array write access; no pull-up/pull-down required. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs on SDA/SCL | Input hysteresis ≥0.05×VCC eliminates false triggering from bus noise, enabling reliable operation in electrically noisy automotive environments. |
| Output slope control | Controlled SDA edge rates suppress ground bounce and EMI, reducing signal integrity risks in dense PCB layouts. |
| Page write (up to 8 bytes) | Reduces I²C transaction overhead vs. byte writes - cuts total bus time by ~75% when updating consecutive memory locations. |
| Half-array hardware write-protect | WP pin directly gates write enable to upper 512 bits (40h–7Fh), allowing safe storage of factory-calibrated values alongside user-modifiable parameters. |
| 100 kHz / 400 kHz I²C compatibility | Supports both standard- and fast-mode I²C masters without protocol translation - simplifies integration across legacy and modern microcontrollers. |
Applications
| Industrial Sensor Calibration | Automotive Body Control Module |
|---|---|
|
Use Scenario: Storing temperature-compensated offset/gain coefficients for analog sensor front-ends in factory calibration fixtures. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding calibrated constants accessed at power-on by MCU ADC driver. Use Value: Enables one-time factory programming with permanent retention; WP pin prevents accidental overwrites during field service. |
Use Scenario: Retaining seat position memory, mirror angle settings, and lighting preferences in vehicle body control units. IC Role / Device Role / Timing Role: I²C slave storing user-configurable parameters updated infrequently but read at every power cycle. Use Value: Automotive-grade temperature range (–40°C to +125°C) and >200-year data retention ensure reliability over full vehicle lifetime. |
| Medical Device Configuration | Smart Energy Meter Firmware Parameters |
|
Use Scenario: Holding regulatory-mandated device ID, calibration timestamps, and safety-critical operational limits in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage element interfaced via isolated I²C bus to main controller. Use Value: Hardware write-protect (WP = VCC) locks critical fields while permitting updates to non-safety parameters via software control. |
Use Scenario: Storing tariff schedules, metering constants, and communication credentials in utility-grade electricity meters deployed outdoors. IC Role / Device Role / Timing Role: Low-power EEPROM accessed during wake-up intervals to restore runtime configuration after deep sleep. Use Value: ≤1 μA standby current extends battery life in battery-backed meters; 4 kV ESD rating withstands harsh installation environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC01B-I/OT | Industrial temperature grade (–40°C to +85°C) instead of automotive (–40°C to +125°C); identical electrical specs and pinout. | Suitable for non-automotive industrial controls where extended high-temp operation is not required. | Select 24LC01B-I/OT for cost-sensitive commercial/industrial designs without under-hood thermal demands. |
| AT24C01C-SSHM-T | Same 1 Kbit capacity and 5-lead SOT-23 package; supports 1.7V–5.5V VCC range and 1 MHz I²C clock; no hardware write-protect pin. | Lacks dedicated WP pin - write protection relies solely on software lock bits, reducing hardware security for critical data. | Choose AT24C01C-SSHM-T when wider voltage range or higher speed is prioritized over hardware-based write-protect enforcement. |
Compared with 24LC01BHT-E/OT, the 24LC01B-I/OT offers identical functionality at lower thermal qualification cost, while the AT24C01C-SSHM-T trades hardware write-protection for broader VCC support and faster I²C - making each suitable for distinct reliability and system architecture priorities.
Availability
24LC01BHT-E/OT is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor calibration systems, medical device configuration storage, and smart energy meter firmware parameter retention requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 24LC01BHT-E/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 automotive, industrial, consumer, and communications markets with high-reliability semiconductor products.
The 24LC01BHT-E/OT belongs to Microchip's 24LCxxB family of I²C serial EEPROMs, designed specifically for robust, low-power nonvolatile data storage in automotive and industrial applications demanding extended temperature operation and hardware-level data integrity safeguards.
FAQ
What is the minimum VCC voltage required for reliable operation of the 24LC01BHT-E/OT?
The 24LC01BHT-E/OT requires a minimum VCC of 2.5V for guaranteed operation across its full automotive temperature range (–40°C to +125°C). Operation below 2.5V is not specified and may result in unreliable I²C communication or failed write cycles. This distinguishes it from the 24AA01H variant, which supports down to 1.7V.
Does the 24LC01BHT-E/OT support page write operations, and what is the maximum page size?
Yes, the 24LC01BHT-E/OT supports page write operations with a maximum page size of 8 bytes. During a page write, the internal address pointer increments automatically for each byte written, wrapping within the same physical page boundary. Attempting to cross a page boundary causes data to wrap to the start of the current page rather than advancing to the next.
How does the WP pin function on the 24LC01BHT-E/OT, and what memory regions does it protect?
When the WP pin on the 24LC01BHT-E/OT is tied to VCC, write operations to memory addresses 40h through 7Fh (upper 512 bits) are inhibited; reads remain fully functional. When WP is tied to VSS, full-array write access is enabled. Pins A0–A2 are unconnected and have no effect on addressing or protection.
What is the I²C bus speed capability of the 24LC01BHT-E/OT, and how does VCC affect it?
The 24LC01BHT-E/OT supports I²C clock frequencies up to 400 kHz when VCC is 2.5V or higher. If VCC falls below 2.5V, maximum clock speed is reduced to 100 kHz. This dual-speed behavior is explicitly defined in the AC characteristics table and must be accounted for in master-side timing configuration.
Is the 24LC01BHT-E/OT pin-compatible with other 5-lead SOT-23 EEPROMs such as the AT24C01C-SSHM-T?
Yes, the 24LC01BHT-E/OT is pin-compatible with the AT24C01C-SSHM-T in the 5-lead SOT-23 package: Pin 1 = SCL, Pin 2 = VSS, Pin 3 = SDA, Pin 4 = VCC, Pin 5 = WP. However, the AT24C01C lacks a hardware WP pin - its Pin 5 is NC - so direct substitution requires redesigning the WP circuitry and relying on software write protection instead.
24LC01BHT-E/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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
24LC01BHT-E/OT FAQ
1.How can I place an order for 24LC01BHT-E/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC01BHT-E/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-E/OT reliable?
The price and inventory of 24LC01BHT-E/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-E/OT is usually 5 days.
3.What payment methods are accepted for 24LC01BHT-E/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC01BHT-E/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC01BHT-E/OT?
24LC01BHT-E/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC01BHT-E/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-E/OT?
For technical support, including 24LC01BHT-E/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC01BHT-E/OT requirements.
6.How does Aetrix verify that 24LC01BHT-E/OT is sourced from the original manufacturer or authorized distributors?
All 24LC01BHT-E/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-E/OT meets industry standards.
7.What is the process for return or replacement of 24LC01BHT-E/OT?
All 24LC01BHT-E/OT units undergo pre-shipment inspection (PSI). If there is an issue with 24LC01BHT-E/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-E/OT part is unused and in its original packaging.
Return procedure for 24LC01BHT-E/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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