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Microchip Technology 24LC01B-E/ST
- Part No.:
- 24LC01B-E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC01B-E/ST.pdf
- Description:
- IC EEPROM 1KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,456
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Product details
Overview
24LC01B-E/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 400 kHz max clock frequency, 5 ms max page write time, and industrial/extended temperature support (–40°C to +125°C). It features hardware write-protection via the WP pin and is commonly used in embedded system configuration storage and calibration data retention.
For engineers reviewing the 24LC01B-E/ST datasheet, 24LC01B-E/ST pinout, 24LC01B-E/ST application, or 24LC01B-E/ST equivalent, key selection criteria include its 2.5V minimum VCC, extended-temperature qualification, 8-byte page buffer, Schmitt-trigger inputs for noise immunity, and compatibility with standard I²C bus timing at 400 kHz.
Technical Context
The 24LC01B-E/ST implements a two-wire I²C interface with fixed 7-bit device address (1010xxx) and R/W bit control, supporting byte and page write modes. Its internal Address Pointer auto-increments during sequential reads and random accesses, enabling efficient block-level data retrieval without repeated address retransmission.
It uses on-chip HV generation for EEPROM programming, includes Schmitt-trigger inputs and output slope control to suppress ground bounce and bus noise, and relies on acknowledge polling to detect write cycle completion - eliminating need for fixed delay timing in host firmware.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Kbit (128 × 8-bit), sufficient for small configuration registers or calibration constants in space-constrained designs. |
| VCC Range | 2.5V to 5.5V - requires no level-shifting when interfacing with 3.3V or 5V microcontrollers. |
| Max Clock Frequency | 400 kHz - supports high-speed I²C mode while maintaining robustness on noisy PCBs. |
| Page Write Buffer | 8 bytes - enables burst writes within a single page boundary, reducing bus overhead vs. byte-by-byte writes. |
| Write Cycle Time | 5 ms maximum - defines worst-case blocking time for host CPU during non-volatile store operations. |
| Data Retention | Over 200 years - ensures long-term reliability for infrequently updated settings in field-deployed equipment. |
| Endurance | 1 million erase/write cycles - supports frequent recalibration or logging in test instrumentation or sensor nodes. |
Pinout & Package
24LC01B-E/ST is supplied in an 8-lead SOIC package (ST suffix), with 1.27 mm pitch, 3.9 mm body width, and JEDEC MS-012AC compliant footprint. Pin 1 is marked by a beveled corner or notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Address Input | No internal connection; may be left floating or tied to VSS/VCC without affecting operation. |
| A1 | Address Input | No internal connection; unused in 24LC01B family - eliminates address conflict concerns in multi-device I²C systems. |
| A2 | Address Input | No internal connection; simplifies board layout by removing need for pull-up/down resistors. |
| VSS | Ground Reference | System return path for all internal logic and EEPROM charge pump; must be low-impedance for stable write operation. |
| SDA | Serial Data I/O | Open-drain bidirectional bus line requiring external pull-up (2 kΩ typical for 400 kHz); carries addresses, commands, and data. |
| SCL | Serial Clock Input | Master-generated clock synchronizing all transfers; Schmitt-trigger input ensures noise immunity on long traces. |
| WP | Write-Protect Control | Logic-high disables all writes to entire memory array (00h–7Fh); critical for preventing accidental corruption during power transitions. |
| VCC | Power Supply | Primary supply for logic and EEPROM programming; internal charge pump generates high voltage for cell programming. |
Key Features
| Feature | Design Value |
|---|---|
| I²C Bus Compatibility | Fully compliant with Philips I²C specification, including Start/Stop detection, ACK/NACK protocol, and 7-bit addressing - interoperable with standard MCU I²C peripherals. |
| Hardware Write Protection | Single-pin (WP) global lock prevents unintended writes during brown-out, reset, or firmware glitches - no software overhead required. |
| Schmitt Trigger Inputs | Input hysteresis ≥0.05×VCC reduces susceptibility to EMI and signal ringing on SDA/SCL lines - improves reliability in automotive or industrial environments. |
| Page Write Capability | 8-byte buffer allows up to 8 sequential bytes to be written in one Stop-initiated transaction - cuts I²C bus traffic by up to 87.5% vs. individual byte writes. |
| Extended Temperature Range | Rated for –40°C to +125°C operation - qualified for under-hood automotive, industrial controls, and outdoor IoT edge nodes. |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Non-volatile configuration register holding trim values accessed at power-up before ADC initialization. Use Value: Enables plug-and-play sensor replacement without manual recalibration; 200-year data retention ensures lifetime validity across product service life. | Use Scenario: Saving user-adjusted therapy parameters (e.g., infusion rate, alarm thresholds) in portable insulin pumps. IC Role / Device Role / Timing Role: Secure, low-power parameter store accessed only during setup or fault recovery - isolated from main processor runtime. Use Value: WP pin prevents overwrite during battery brown-out; 1 µA standby current extends battery life between recharges. |
| Automotive Body Control Module | Smart Home Thermostat Memory |
Use Scenario: Retaining seat/mirror position presets and lighting profiles across ignition cycles in AEC-Q100-compliant BCMs. IC Role / Device Role / Timing Role: I²C slave storing user preferences in EEPROM; accessed via microcontroller during wake-up sequence. Use Value: Extended temperature rating (–40°C to +125°C) and AEC-Q100 qualification ensure operation in harsh under-dash environments. | Use Scenario: Holding HVAC schedule, Wi-Fi credentials, and firmware update flags in battery-powered thermostats. IC Role / Device Role / Timing Role: Low-voltage (2.5V min) serial EEPROM interfaced to 3.3V SoC; stores persistent state during deep-sleep modes. Use Value: 1 µA max standby current minimizes battery drain; 8-byte page writes reduce I²C activity during OTA credential updates. |
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/ST | Lower VCC min (1.7V), same 400 kHz speed, industrial-only temp range (–40°C to +85°C). | Not qualified for extended-temp or automotive use; suitable for cost-sensitive consumer electronics with 1.8V+ supplies. | Select when 1.7V operation is required and extended temperature is unnecessary. |
| AT24C01D-SSHM-T | Same 1 Kbit size, 1.7V–5.5V VCC, 400 kHz, but rated only to +85°C and lacks AEC-Q100 qualification. | Not suitable for under-hood or extended-temperature industrial deployments; lower ESD rating (2 kV vs. 4 kV). | Choose for general-purpose 3.3V/5V systems where automotive qualification is not mandated. |
Compared with 24LC01B-E/ST, the 24AA01-I/ST offers wider voltage flexibility but sacrifices extended temperature capability, while AT24C01D-SSHM-T provides broader voltage range and lower cost but lacks AEC-Q100 validation and high-temperature endurance - making 24LC01B-E/ST the optimal choice for mission-critical automotive and industrial applications demanding full –40°C to +125°C operation.
Availability
24LC01B-E/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, medical device configuration, and smart home thermostat memory requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 24LC01B-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 leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 24LC01B belongs to Microchip's serial EEPROM product line, engineered for reliable, low-power non-volatile storage in automotive, industrial, and medical systems where data integrity and extended temperature operation are essential.
FAQ
What is the minimum supply voltage required for reliable operation of the 24LC01B-E/ST?
The 24LC01B-E/ST requires a minimum VCC of 2.5V for guaranteed operation across its full extended temperature range (–40°C to +125°C). Operation below 2.5V is not specified and may result in incomplete writes or communication failure. This distinguishes it from the 24AA01, which supports down to 1.7V.
Does the 24LC01B-E/ST support standard I²C bus speeds, and what is its maximum clock frequency?
Yes, the 24LC01B-E/ST supports standard-mode I²C at up to 400 kHz when VCC is 2.5V or higher. It does not support fast-mode plus (1 MHz) - that capability is exclusive to the 24FC01 variant. The 24LC01B-E/ST's 400 kHz limit ensures robust timing margins in electrically noisy environments.
How does the Write-Protect (WP) pin function on the 24LC01B-E/ST?
When the WP pin of the 24LC01B-E/ST is tied to VCC, all write operations to the entire memory array (addresses 00h–7Fh) are inhibited; read operations remain fully functional. When WP is tied to VSS or left floating, normal read/write access is enabled. This hardware lock operates independently of I²C commands.
Can the 24LC01B-E/ST be used in automotive applications, and what qualifications does it hold?
Yes, the 24LC01B-E/ST is AEC-Q100 qualified and rated for extended temperature operation from –40°C to +125°C, making it suitable for automotive body control modules, infotainment systems, and ADAS-related subsystems where reliability under thermal stress is mandatory.
What package type does the 24LC01B-E/ST use, and is it compatible with standard SOIC footprints?
The 24LC01B-E/ST uses an 8-lead SOIC package (ST suffix) with 1.27 mm pitch and 3.9 mm body width, conforming to JEDEC MS-012AC. It is fully compatible with industry-standard SOIC-8 land patterns and reflow soldering profiles, enabling drop-in replacement in existing designs.
24LC01B-E/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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:
- 3.5 µs
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24LC01B-E/ST FAQ
1.How can I place an order for 24LC01B-E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC01B-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 24LC01B-E/ST reliable?
The price and inventory of 24LC01B-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 24LC01B-E/ST is usually 5 days.
3.What payment methods are accepted for 24LC01B-E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC01B-E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC01B-E/ST?
24LC01B-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC01B-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 24LC01B-E/ST?
For technical support, including 24LC01B-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC01B-E/ST requirements.
6.How does Aetrix verify that 24LC01B-E/ST is sourced from the original manufacturer or authorized distributors?
All 24LC01B-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 24LC01B-E/ST meets industry standards.
7.What is the process for return or replacement of 24LC01B-E/ST?
All 24LC01B-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC01B-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 24LC01B-E/ST part is unused and in its original packaging.
Return procedure for 24LC01B-E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC01B-E/ST Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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