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Microchip Technology 24LC01BHT-I/ST
- Part No.:
- 24LC01BHT-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC01BHT-I/ST.pdf
- Description:
- IC EEPROM 1KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,810
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Product details
Overview
24LC01BHT-I/ST 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 and page writes (up to 8 bytes), delivers ≤1 mA read current and ≤1 μA standby current, and is used in embedded system configuration storage, sensor calibration data retention, and firmware parameter backup.
For engineers reviewing the 24LC01BHT-I/ST datasheet, 24LC01BHT-I/ST pinout, 24LC01BHT-I/ST application, or 24LC01BHT-I/ST equivalent, this page provides verified electrical parameters, package-specific terminal mapping, real-world use cases, and validated alternative parts for design continuity and supply chain resilience.
Technical Context
The 24LC01BHT-I/ST implements a 2-wire I²C 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 half-array hardware write-protection (enabled via WP = VCC) isolates memory block 40h–7Fh while allowing full read access across 00h–7Fh.
It uses CMOS EEPROM technology with >1 million erase/write cycles and >200 years of data retention. The device requires no external components for basic operation-only pull-up resistors on SDA/SCL-and supports acknowledge polling to detect write cycle completion without timing delays.
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 operating range | 2.5V to 5.5V - compatible with 3.3V and 5V logic systems; not functional below 2.5V |
| Max I²C clock frequency | 400 kHz at VCC ≥ 2.5V - enables faster parameter loading than 100 kHz legacy EEPROMs |
| Write endurance | ≥1,000,000 cycles - supports frequent field updates such as logging or counter increments |
| Data retention | >200 years at +25°C - ensures long-term reliability in unpowered storage applications |
| Standby current | ≤1 μA at VCC = 5.5V - critical for battery-powered devices requiring ultra-low quiescent power |
| Page write capacity | 8 bytes per page - reduces I²C transaction overhead when updating related parameter sets |
Pinout & Package
24LC01BHT-I/ST is supplied in an 8-lead Plastic Thin Shrink Small Outline (TSSOP) package (4.4 mm body width), RoHS-compliant and Pb-free. Pin 1 is A0 (no internal connection); pins A1 and A2 are also unconnected. VSS (pin 4) and VCC (pin 8) provide power; SDA (pin 5) and SCL (pin 6) form the bidirectional I²C bus; WP (pin 7) controls half-array write protection; all three address pins may be left floating or tied to VSS/VCC without effect.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Address input (NC) | No internal connection; may be left floating or tied to VSS/VCC without affecting operation |
| A1 | Address input (NC) | No internal connection; does not participate in slave addressing or memory selection |
| A2 | Address input (NC) | No internal connection; unused in 24LC01BHT-I/ST's fixed 1010xxx binary address scheme |
| VSS | Ground reference | Return path for all internal circuitry; must be connected to system ground plane |
| SDA | Serial data I/O | Open-drain bidirectional line requiring external pull-up; carries address, command, and data |
| SCL | Serial clock input | Master-generated clock synchronizing all I²C transfers; edge-sensitive timing critical for ACK/NACK |
| WP | Write-protect control | High = protect addresses 40h–7Fh; low = full read/write access; no effect on read operations |
| VCC | Power supply | 2.5V–5.5V DC input; internal voltage detector disables writes if VCC drops below ~1.5V |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs on SDA/SCL | Enables robust operation on noisy PCBs or long traces by rejecting sub-50 ns spikes and improving noise margin |
| Hardware write-protect (WP pin) | Prevents accidental overwrites of critical configuration data (40h–7Fh) without software intervention |
| Page write capability (8-byte buffer) | Reduces I²C bus occupancy by up to 8× vs. byte writes when storing contiguous parameter blocks |
| ESD protection >4 kV | Meets IEC 61000-4-2 Level 2 requirements, reducing need for external transient suppression |
| I²C bus compatibility (100/400 kHz) | Interoperates with standard microcontroller I²C peripherals without custom timing or protocol translation |
Applications
| Industrial Sensor Calibration Storage | Embedded System Boot Configuration |
|---|---|
|
Use Scenario: Storing factory-calibrated offset/gain values for analog sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent trim data accessed during power-up initialization. Use Value: Eliminates need for external calibration potentiometers or reprogramming after power loss; supports field recalibration via I²C. |
Use Scenario: Holding boot-time configuration flags (e.g., UART baud rate, display resolution, network MAC override) in medical diagnostic equipment. IC Role / Device Role / Timing Role: Slave I²C device providing early-boot parameter set before main application firmware loads. Use Value: Enables flexible product variants from single BOM; allows end-user customization without firmware reflashing. |
| Consumer Appliance Parameter Backup | Automotive Body Control Module Settings |
|
Use Scenario: Retaining user preferences (e.g., timer settings, temperature presets) in smart home thermostats during AC power interruptions. IC Role / Device Role / Timing Role: Low-power I²C EEPROM maintaining volatile state across brownout events. Use Value: Achieves <1 μA standby draw to extend backup capacitor hold-up time; withstands >1M write cycles over 10-year product life. |
Use Scenario: Storing seat position memory, mirror angle offsets, and lighting profiles in automotive door modules. IC Role / Device Role / Timing Role: Industrial-temp-rated serial EEPROM interfacing with CAN-connected microcontrollers via I²C bridge. Use Value: Qualified for –40°C to +85°C operation; hardware WP prevents corruption during ECU reset sequences. |
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/ST | Lower VCC min (1.7V), same 1 Kbit density and TSSOP-8 package; shares identical pinout and I²C protocol | Required where system operates down to 1.7V (e.g., coin-cell powered devices); not suitable for 2.5V-only rails | Select 24AA01HT-I/ST only if 1.7V operation is mandatory; otherwise 24LC01BHT-I/ST offers tighter VCC tolerance at higher voltage rails. |
| AT24C01C-SSHM-T | Same 1 Kbit, 2.5–5.5V, TSSOP-8, I²C-compatible; differs in write-cycle time (5 ms vs. 3 ms typical) and endurance (1M vs. 1M cycles) | Drop-in replacement in most 24LC01BHT-I/ST designs; requires validation of ACK polling timing due to longer write latency | Choose AT24C01C-SSHM-T when sourcing diversification is needed; verify WP functionality and timing margins in high-throughput write scenarios. |
Compared with 24LC01BHT-I/ST, the 24AA01HT-I/ST extends low-voltage operation but sacrifices VCC noise margin, while the AT24C01C-SSHM-T maintains voltage compatibility at the cost of slightly slower write completion-both require validation of WP behavior and I²C timing margins in safety-critical systems.
Availability
24LC01BHT-I/ST is available at Aetrix Electronics and suitable for industrial sensor calibration storage, embedded system boot configuration, and consumer appliance parameter backup requiring stable component supply across multi-year production cycles.
Supply support for 24LC01BHT-I/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 leading provider of microcontroller, mixed-signal, analog, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with vertically integrated silicon and development tools.
The 24LC01BHT-I/ST belongs to Microchip's 24LCxxB serial EEPROM product line, designed specifically for reliable, low-power nonvolatile data storage in resource-constrained embedded systems with strict voltage and footprint requirements.
FAQ
What is the minimum VCC required for reliable operation of the 24LC01BHT-I/ST?
The 24LC01BHT-I/ST requires a minimum VCC of 2.5V for guaranteed operation across its full industrial temperature range (–40°C to +85°C). Operation below 2.5V is not specified and may result in failed writes, corrupted reads, or unpredictable WP pin behavior. This distinguishes it from the 24AA01H series, which supports down to 1.7V.
How does the WP pin function on the 24LC01BHT-I/ST?
On the 24LC01BHT-I/ST, the WP pin enables hardware write-protection for memory addresses 40h–7Fh when pulled high to VCC; when grounded (VSS), full read/write access is granted across 00h–7Fh. Read operations remain fully functional regardless of WP state, and the pin has no effect on I²C communication timing or ACK generation.
Can the 24LC01BHT-I/ST be used in a 100 kHz I²C system?
Yes, the 24LC01BHT-I/ST supports 100 kHz I²C operation across its entire VCC range (2.5V–5.5V). Its AC specifications guarantee timing compliance at 100 kHz, including THIGH, TLOW, and setup/hold times. No configuration changes or external components are needed to operate at this speed.
What is the maximum number of bytes that can be written in a single page write operation for the 24LC01BHT-I/ST?
The 24LC01BHT-I/ST supports up to 8 bytes per page write operation. Attempting to write more than 8 bytes before issuing a Stop condition causes the address pointer to wrap within the current page boundary (00h–07h, 08h–0Fh, etc.), overwriting earlier data rather than advancing to the next page. This behavior is inherent to its 8-byte page buffer architecture.
Is the 24LC01BHT-I/ST pin-compatible with other 8-pin TSSOP EEPROMs like the AT24C01C?
Yes, the 24LC01BHT-I/ST uses standard TSSOP-8 pinout (A0–A2/VSS/SDA/SCL/WP/VCC) matching the AT24C01C-SSHM-T and 24AA01HT-I/ST. All share identical pin functions and physical dimensions, enabling direct PCB footprint reuse-though firmware-level validation of write timing and WP response is recommended before substitution.
24LC01BHT-I/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 900 ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24LC01BHT-I/ST FAQ
1.How can I place an order for 24LC01BHT-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC01BHT-I/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 24LC01BHT-I/ST reliable?
The price and inventory of 24LC01BHT-I/ST 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/ST is usually 5 days.
3.What payment methods are accepted for 24LC01BHT-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC01BHT-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC01BHT-I/ST?
24LC01BHT-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC01BHT-I/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 24LC01BHT-I/ST?
For technical support, including 24LC01BHT-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC01BHT-I/ST requirements.
6.How does Aetrix verify that 24LC01BHT-I/ST is sourced from the original manufacturer or authorized distributors?
All 24LC01BHT-I/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 24LC01BHT-I/ST meets industry standards.
7.What is the process for return or replacement of 24LC01BHT-I/ST?
All 24LC01BHT-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC01BHT-I/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 24LC01BHT-I/ST part is unused and in its original packaging.
Return procedure for 24LC01BHT-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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