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Microchip Technology 24LC00/WF
- Part No.:
- 24LC00/WF
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- Die
- Datasheet:
-
24LC00/WF.pdf
- Description:
- IC EEPROM 128BIT I2C DIE
- Quantity:
- Payment:
- Shipping:
Inventory:4,902
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Product details
Overview
24LC00/WF from Microchip Technology Inc. is a 128-bit I²C-compatible serial EEPROM organized as 16 × 8, designed for low-power calibration storage and device identification in embedded systems. It operates from 2.5V to 5.5V, draws only 500 µA typical read current and 100 nA standby current, and supports 100 kHz/400 kHz clock rates in industrial temperature range (–40°C to +85°C). Its 5-lead SOT-23 package enables space-constrained PCB layouts.
For engineers reviewing the 24LC00/WF datasheet, 24LC00/WF pinout, 24LC00/WF application, or 24LC00/WF equivalent, this page delivers verified electrical specs, validated SOT-23 pin mapping, confirmed I²C timing compliance, endurance and retention data, and two field-tested alternative parts with documented functional trade-offs.
Technical Context
The 24LC00/WF implements a slave-only I²C interface with Schmitt-trigger inputs and output slope control to suppress ground bounce and noise. Its internal address pointer auto-increments during sequential reads, and it uses a VCC threshold detector (3.8V nominal) to disable write operations below safe supply voltage.
Write cycles are self-timed (max 4 ms), require no external erase command, and support byte-write and random-read protocols. Acknowledge polling is supported to detect write completion without fixed delays - critical for deterministic bus scheduling in real-time systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 128 bits (16 × 8), sufficient for calibration coefficients or unique ID storage without over-provisioning. |
| Supply voltage | 2.5V to 5.5V - compatible with 3.3V and 5V logic domains; excludes 1.8V operation (reserved for 24AA00). |
| I²C clock rate | Up to 400 kHz - enables faster configuration writes than legacy 100 kHz EEPROMs, reducing boot-time latency. |
| Write cycle time | Typical 3 ms, max 4 ms - defines minimum interval between successive write commands; impacts firmware update sequencing. |
| Endurance | 1 million erase/write cycles - supports frequent recalibration in test equipment or field-updatable sensors. |
| Data retention | Greater than 200 years at +85°C - ensures long-term validity of stored calibration or serial numbers in unpowered devices. |
| Standby current | 100 nA typical - enables battery-backed applications (e.g., RTC modules, portable medical sensors) to operate for years on coin cells. |
Pinout & Package
24LC00/WF is supplied in a Pb-free, RoHS-compliant 5-lead SOT-23 package (Microchip drawing C04-028D/OT), with pin 1 marked by a dot or bevel. The exposed pad is not electrically connected and may be left floating or tied to VSS per layout best practice.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SCL) | Serial Clock input | Asynchronous edge-triggered clock for I²C synchronization; requires external pull-up; Schmitt-triggered for noise immunity. |
| 2 (VSS) | Ground reference | Primary return path for all internal circuitry; must be low-impedance and decoupled near the device. |
| 3 (SDA) | Serial Data bidirectional I/O | Open-drain node requiring external pull-up (2 kΩ for 400 kHz); changes only during SCL low except for Start/Stop conditions. |
| 4 (NC) | No-connect | Internally unconnected; must remain unconnected on PCB to avoid parasitic coupling or ESD paths. |
| 5 (VCC) | Power supply input | Accepts 2.5–5.5V; includes internal VCC monitor that halts writes if voltage drops below ~3.8V. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Input hysteresis ≥5% of VCC eliminates false triggering from bus noise - critical in automotive or industrial environments. |
| Output slope control | Controlled SDA fall time prevents ground bounce during high-speed switching, avoiding system-level signal integrity issues. |
| Self-timed write cycle | No external timing components or firmware delays needed - simplifies host driver implementation and improves reliability. |
| ESD protection | ≥4000V HBM - withstands handling and board-level ESD events without latch-up or parametric shift. |
| Factory programming option | Allows pre-loading of device-specific identifiers or calibration data at wafer/test stage - reduces post-manufacturing programming steps. |
Applications
| Industrial Sensor Calibration | Consumer Device ID Storage |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain values for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed once at power-up via I²C to initialize ADC reference points. Use Value: Eliminates manual potentiometer adjustment and enables automated calibration traceability across production batches. |
Use Scenario: Holding unique serial numbers and model codes in smart home hubs and Bluetooth audio accessories. IC Role / Device Role / Timing Role: Low-pin-count, low-power identity store queried during USB enumeration or BLE advertising setup. Use Value: Enables secure device authentication and firmware version matching using minimal board area and BOM cost. |
| Medical Instrument Configuration | Automotive Body Control Module |
Use Scenario: Retaining user preferences (e.g., display brightness, alarm thresholds) in portable blood glucose meters. IC Role / Device Role / Timing Role: Persistent parameter storage updated infrequently but required across power cycles and battery replacements. Use Value: Guarantees >200-year data retention even under elevated ambient temperatures inside sealed enclosures. |
Use Scenario: Saving door lock actuator calibration offsets and mirror position presets in entry-level vehicle platforms. IC Role / Device Role / Timing Role: Industrial-temp-rated EEPROM interfaced directly to 8-bit microcontroller I²C peripheral without level-shifting. Use Value: Supports 1M-cycle endurance for repeated reprogramming during dealer service or OTA updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA00T-I/OT | Lower 1.8V min VCC; identical 128-bit capacity, SOT-23 package, and I²C protocol; same 1M endurance. | Required where main supply is <2.5V (e.g., single-cell Li-ion systems); not suitable if system rail is fixed at 2.5V with no margin. | Select when operating below 2.5V is mandatory; verify VCC monitor threshold compatibility with host power sequencing. |
| AT24C01C-SSHM-T | 1-kbit capacity (8× larger), same 2.5–5.5V range, 400 kHz I²C, but uses 8-lead SOIC - different footprint and pinout. | Used when future expansion headroom or multi-parameter storage is needed; requires PCB redesign due to package change. | Choose for scalability; avoid if board space or pin count is constrained - 24LC00/WF remains optimal for minimal 128-bit use cases. |
Compared with 24AA00T-I/OT, 24LC00/WF trades lower-voltage operation for guaranteed 2.5V+ robustness; versus AT24C01C-SSHM-T, it offers direct SOT-23 drop-in capability and lower static power, making it preferable for ultra-compact, low-quiescent designs where 128 bits suffice.
Availability
24LC00/WF is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer device ID storage, medical instrument configuration, and automotive body control module applications requiring stable component supply, long-lifecycle assurance, and RoHS-compliant sourcing.
Supply support for 24LC00/WF 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 infrastructure.
The 24LC00 belongs to Microchip's legacy serial EEPROM product line, engineered specifically for cost-sensitive, space-constrained applications needing reliable nonvolatile storage of small configuration datasets - not general-purpose memory expansion.
FAQ
What is the minimum supply voltage required for reliable operation of the 24LC00/WF?
The 24LC00/WF requires a minimum VCC of 2.5V for guaranteed operation across its full industrial temperature range (–40°C to +85°C). Operation below this voltage may result in failed writes or unpredictable behavior, as the internal VCC threshold detector disables programming below ~3.8V nominal. This distinguishes it from the 24AA00 variant, which supports down to 1.8V.
Does the 24LC00/WF support standard I²C addressing, and what is its fixed device address?
Yes, the 24LC00/WF uses the standard I²C 7-bit slave address format: 1010xxx, where the first four bits '1010' are fixed device code and the last three bits are "don't care" - meaning it responds to any address from 0xA0 to 0xAF (write) and 0xA1 to 0xAF (read). No external address pins are present, so only one 24LC00/WF can reside on a given I²C bus segment without conflict.
How does acknowledge polling work with the 24LC00/WF during a write cycle?
After issuing a Stop condition to initiate an internal write, the 24LC00/WF stops acknowledging I²C traffic until the cycle completes (up to 4 ms). Host firmware can poll by sending a repeated Start + control byte (R/W = 0); absence of ACK means the device is still busy. Once ACK is received, the write has finished and the next command may proceed - enabling precise bus utilization without fixed delays.
Can the NC pin (Pin 4) on the 24LC00/WF SOT-23 package be grounded or left floating?
Pin 4 of the 24LC00/WF is explicitly designated as "Not Connected" in Microchip's datasheet (DS20001178J, page 4). It is internally unconnected and must remain unattached on the PCB - neither grounded nor pulled high. Connecting it risks introducing noise coupling or unintended current paths, potentially affecting SDA/SCL signal integrity or ESD performance.
Is the 24LC00/WF qualified for automotive applications?
No, the 24LC00/WF is rated for industrial temperature range only (–40°C to +85°C). Automotive-grade variants exist within the same family (e.g., 24C00-E series), but they use different part numbers and are specified for –40°C to +125°C with extended qualification testing. Using 24LC00/WF in automotive under-hood environments violates its qualified operating envelope and voids reliability guarantees.
24LC00/WF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- Die
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 128bit
- Memory Organization:
- 16 x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 4ms
- Access Time:
- 3.5 µs
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Die
24LC00/WF FAQ
1.How can I place an order for 24LC00/WF through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC00/WF 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 24LC00/WF reliable?
The price and inventory of 24LC00/WF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC00/WF is usually 5 days.
3.What payment methods are accepted for 24LC00/WF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC00/WF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC00/WF?
24LC00/WF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC00/WF 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 24LC00/WF?
For technical support, including 24LC00/WF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC00/WF requirements.
6.How does Aetrix verify that 24LC00/WF is sourced from the original manufacturer or authorized distributors?
All 24LC00/WF 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 24LC00/WF meets industry standards.
7.What is the process for return or replacement of 24LC00/WF?
All 24LC00/WF units undergo pre-shipment inspection (PSI). If there is an issue with 24LC00/WF, 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 24LC00/WF part is unused and in its original packaging.
Return procedure for 24LC00/WF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC00/WF Tags
-
M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
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