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Microchip Technology 24LC01BHT-E/ST
- Part No.:
- 24LC01BHT-E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC01BHT-E/ST.pdf
- Description:
- IC EEPROM 1KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,725
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Product details
Overview
24LC01BHT-E/ST from Microchip Technology Inc. is a 1 Kbit I²C-compatible serial EEPROM organized as 128 × 8-bit memory with hardware write-protect for the upper half-array (40h–7Fh), 400 kHz max clock frequency at VCC ≥ 2.5V, and industrial temperature range (−40°C to +85°C). It operates from 2.5V to 5.5V, supports page writes of up to 8 bytes, and delivers ≤1 μA standby current - used in embedded system configuration storage, sensor calibration data retention, and firmware parameter backup.
For engineers reviewing the 24LC01BHT-E/ST datasheet, 24LC01BHT-E/ST pinout, 24LC01BHT-E/ST application, or 24LC01BHT-E/ST equivalent, this page provides verified electrical parameters, package-specific terminal mapping, I²C timing compliance details, and validated alternative parts for design continuity and supply chain resilience.
Technical Context
The 24LC01BHT-E/ST implements a two-wire I²C interface with Schmitt-trigger inputs on SDA and SCL for noise immunity, internal address pointer auto-increment for sequential reads, and a dedicated WP pin that enables hardware-level write protection of addresses 40h–7Fh when pulled high. Its EEPROM array uses CMOS floating-gate technology with >1 million erase/write cycles and >200 years data retention.
It supports byte and page write modes, acknowledges slave address (1010xxx0/1) with no device addressing via A0–A2 pins (unconnected internally), and features built-in VCC threshold detection to inhibit writes below 1.5V. Timing complies with standard-mode (100 kHz) and fast-mode (400 kHz) I²C specifications across its rated voltage and temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Kbit (128 × 8-bit), sufficient for small configuration tables or calibration coefficients |
| VCC operating range | 2.5V to 5.5V - compatible with 3.3V and 5V logic systems without level shifting |
| Max I²C clock frequency | 400 kHz at VCC ≥ 2.5V - enables faster parameter updates than standard-mode I²C |
| Page write capacity | Up to 8 bytes per write cycle - reduces bus transactions for multi-byte updates |
| Write-protect scope | Hardware-enforced protection of upper 512 bits (40h–7Fh) via WP pin - prevents accidental overwrites of critical firmware data |
| Endurance & retention | ≥1 million erase/write cycles and >200 years data retention - suitable for long-life industrial deployments |
| Standby current | ≤1 μA at VCC = 5.5V - minimizes power draw in battery-backed or energy-constrained nodes |
Pinout & Package
24LC01BHT-E/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 rails; SDA (pin 5) and SCL (pin 6) form the bidirectional I²C bus; WP (pin 7) controls write protection; all pins except VSS/VCC require external pull-up resistors per I²C specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Address input (NC) | No internal connection - may be left floating or tied to VSS/VCC without functional impact |
| A1 | Address input (NC) | No internal connection - does not affect device addressing or I²C slave address (fixed 1010xxx) |
| A2 | Address input (NC) | No internal connection - eliminates need for external address selection logic |
| VSS | Ground reference | System ground return path; must be low-impedance for stable EEPROM operation |
| 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 | Pull high to disable writes to 40h–7Fh; pull low for full-array read/write access |
| VCC | Power supply | 2.5V–5.5V supply; internal voltage detector disables writes if VCC drops below ~1.5V |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs on SDA/SCL | Enables reliable operation on noisy PCBs or long traces by rejecting sub-50 ns spikes and improving noise margin |
| Output slope control | Prevents ground bounce during output transitions - critical for stable signaling in mixed-signal systems |
| Half-array hardware write-protect | Physically blocks writes to upper 512 bits (40h–7Fh) without software overhead or fuse programming |
| 100 kHz / 400 kHz I²C compatibility | Supports both standard and fast-mode timing - allows reuse across legacy and performance-optimized designs |
| Factory programmable option | Enables pre-loading of boot configuration or security keys at manufacturing - reduces field programming steps |
Applications
| Industrial Sensor Node | Medical Device Calibration |
|---|---|
|
Use Scenario: Storing calibrated offset/gain values for analog front-end sensors in factory-deployed environmental monitors. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with infrequent writes and frequent reads; accessed via I²C during power-up or recalibration. Use Value: Ensures measurement accuracy persists across power cycles and firmware updates without external backup power. |
Use Scenario: Retaining patient-specific calibration profiles in portable diagnostic equipment subject to regulatory traceability requirements. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter storage; WP pin permanently enabled to prevent runtime corruption of clinical settings. Use Value: Meets IEC 62304 data integrity requirements through hardware write-locking of critical calibration zones. |
| Smart Meter Firmware Settings | Automotive Body Control Module |
|
Use Scenario: Holding utility-defined tariff schedules, meter ID, and communication parameters in ANSI C12.19-compliant electricity meters. IC Role / Device Role / Timing Role: Low-power configuration register; accessed only during initialization or remote firmware update events. Use Value: ≤1 μA standby current extends battery life in AMI endpoints; 200-year retention avoids field replacement due to data decay. |
Use Scenario: Saving seat/mirror position presets and lighting configuration in automotive interior control units operating at −40°C to +85°C. IC Role / Device Role / Timing Role: Automotive-grade nonvolatile memory interfacing directly with MCU I²C peripheral; no level shifters required. Use Value: Qualified for industrial temperature range and >1M endurance - withstands repeated user customization cycles over vehicle lifetime. |
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; A0–A2 pins also NC | Better suited for 1.8V systems or battery-powered devices with brown-out conditions | Select when operating below 2.5V is required; verify WP behavior and timing specs match system clock rate |
| AT24C01D-SSHM-T | Same 1 Kbit, TSSOP-8, I²C-compatible; supports 1.7–5.5V; no hardware half-array write-protect | Lacks dedicated WP pin functionality - requires software-based protection or external logic for write control | Choose when full-array write access is needed and hardware lock is unnecessary; confirm ESD rating (4 kV vs. AT24C01D's 2.5 kV) |
Compared with 24LC01BHT-E/ST, the 24AA01HT-I/ST offers wider voltage flexibility but identical pinout and protection scheme, while the AT24C01D-SSHM-T trades hardware write-protect for broader voltage support and slightly lower ESD tolerance - impacting robustness in electrically noisy environments.
Availability
24LC01BHT-E/ST is available at Aetrix Electronics and suitable for industrial sensor nodes, medical calibration storage, smart meter firmware settings, and automotive body control modules requiring stable component supply, long-term data retention, and automotive-grade temperature resilience.
Supply support for 24LC01BHT-E/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 global provider of microcontroller, mixed-signal, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, with design and manufacturing operations worldwide.
The 24LC01BHT-E/ST belongs to Microchip's serial EEPROM product line, engineered for reliable, low-power nonvolatile data storage in space-constrained embedded systems where I²C interface simplicity and hardware write security are essential.
FAQ
What is the exact memory organization of the 24LC01BHT-E/ST?
The 24LC01BHT-E/ST contains 1 Kbit (128 words × 8 bits) of EEPROM memory, arranged as a single block with linear addressing from 00h to 7Fh. It supports both byte-write and page-write (up to 8 bytes) operations, with internal address pointer auto-increment enabling sequential reads across the full array without reissuing the address.
Does the 24LC01BHT-E/ST require external pull-up resistors on SDA and SCL lines?
Yes, the 24LC01BHT-E/ST has open-drain SDA and SCL outputs and requires external pull-up resistors. Typical values are 10 kΩ for 100 kHz operation and 2 kΩ for 400 kHz, referenced to VCC. Proper resistor selection ensures rise time compliance per I²C AC specifications across voltage and temperature ranges.
How does the WP pin function on the 24LC01BHT-E/ST?
When WP is tied to VCC, the 24LC01BHT-E/ST hardware-write-protects memory addresses 40h–7Fh (upper 512 bits); reads remain enabled. When WP is tied to VSS, full-array read/write access is permitted. The pin has no effect during read operations and does not require debouncing or filtering.
Is the 24LC01BHT-E/ST compatible with fast-mode I²C (400 kHz)?
Yes, the 24LC01BHT-E/ST supports 400 kHz clock frequency when VCC is 2.5V or higher. At VCC < 2.5V, maximum clock speed defaults to 100 kHz. All AC timing parameters - including THIGH, TLOW, and setup/hold times - are guaranteed across this dual-speed capability per DS22104A.
What is the endurance and data retention specification for the 24LC01BHT-E/ST?
The 24LC01BHT-E/ST guarantees more than 1 million erase/write cycles and greater than 200 years of data retention at +25°C. These values are characterized and ensured per Microchip's Total Endurance™ Model; actual retention decreases logarithmically with elevated temperature but remains >100 years at +85°C.
24LC01BHT-E/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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24LC01BHT-E/ST FAQ
1.How can I place an order for 24LC01BHT-E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC01BHT-E/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-E/ST reliable?
The price and inventory of 24LC01BHT-E/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-E/ST is usually 5 days.
3.What payment methods are accepted for 24LC01BHT-E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC01BHT-E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC01BHT-E/ST?
24LC01BHT-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC01BHT-E/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-E/ST?
For technical support, including 24LC01BHT-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC01BHT-E/ST requirements.
6.How does Aetrix verify that 24LC01BHT-E/ST is sourced from the original manufacturer or authorized distributors?
All 24LC01BHT-E/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-E/ST meets industry standards.
7.What is the process for return or replacement of 24LC01BHT-E/ST?
All 24LC01BHT-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC01BHT-E/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-E/ST part is unused and in its original packaging.
Return procedure for 24LC01BHT-E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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