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Microchip Technology 24LC04BT-E/ST
- Part No.:
- 24LC04BT-E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC04BT-E/ST.pdf
- Description:
- IC EEPROM 4KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,946
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Product details
Overview
24LC04BT-E/ST from Microchip Technology Inc. is a 4-Kbit I²C-compatible serial EEPROM organized as two 256 × 8-bit blocks, operating from 2.5V to 5.5V with 400 kHz max clock frequency, 5 ms max page write time, and hardware write-protection via the WP pin. It is used in industrial and extended-temperature embedded systems for configuration storage, calibration data retention, and firmware parameter backup.
For engineers reviewing the 24LC04BT-E/ST datasheet, 24LC04BT-E/ST pinout, 24LC04BT-E/ST application, or 24LC04BT-E/ST equivalent, this page delivers verified electrical specs, SOIC-8 package details, I²C timing constraints, endurance (1M cycles), and real-world use cases in automotive control modules, smart sensors, and power supply management units.
Technical Context
The 24LC04BT-E/ST implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal address pointer supports current-address, random, and sequential read modes, while the 16-byte page write buffer enables efficient bulk writes within physical page boundaries (0–15, 16–31, etc.).
Write protection is enforced by tying the WP pin to VCC, disabling all write operations across the full 000–1FF address range. The device uses self-timed erase/write cycles and supports acknowledge polling to detect write completion without fixed delay timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Kbit (512 bytes), organized as two independent 256 × 8-bit blocks for segmented access |
| VCC Range | 2.5V to 5.5V - compatible with standard 3.3V and 5V logic rails; not operational below 2.5V |
| Max Clock Frequency | 400 kHz - supports high-speed I²C mode; no 1 MHz capability (reserved for 24FC04 only) |
| Page Write Buffer | 16 bytes - enables single-burst writes up to 16 bytes per Stop condition, improving write throughput |
| Write Cycle Time | 5 ms maximum - defines worst-case latency before next I²C transaction can begin |
| Endurance | 1,000,000 erase/write cycles - ensures long-term reliability in field-updatable systems |
| Data Retention | 200 years at +25°C - guarantees nonvolatile storage integrity over product lifetime |
Pinout & Package
24LC04BT-E/ST is supplied in an 8-lead SOIC (SN) package per Microchip drawing C04-057-SN Rev F, with 3.90 mm body width, 1.27 mm pitch, and gull-wing leads. 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 effect on operation |
| A1 | Address Input | No internal connection; unused per device architecture and does not affect I²C addressing |
| A2 | Address Input | No internal connection; functionally inert and electrically isolated from internal logic |
| VSS | Ground Reference | Primary return path for all internal circuitry; must be connected to system GND for stable biasing |
| 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 | Input-only synchronous clock line driven by host controller; determines I²C timing and data sampling points |
| WP | Write-Protect Control | Logic-level input: tied to VSS enables full read/write; tied to VCC locks entire memory array against writes |
| VCC | Power Supply | Single 2.5–5.5V supply powering EEPROM core, interface logic, and charge pump; no separate VPP required |
Key Features
| Feature | Design Value |
|---|---|
| I²C Compatibility | Fully compliant with Philips I²C-bus specification, supporting standard-mode (100 kHz) and fast-mode (400 kHz) timing |
| Schmitt Trigger Inputs | 0.05×VCC hysteresis on SDA/SCL pins ensures robust noise immunity on electrically noisy PCBs or long traces |
| Output Slope Control | Controlled rise/fall times prevent ground bounce and EMI during bus transitions, critical in mixed-signal environments |
| Hardware Write-Protection | Dedicated WP pin provides fail-safe, pin-level memory lock-no software overhead or register configuration needed |
| Extended Temperature Range | Rated for -40°C to +125°C operation, qualified to AEC-Q100 Grade 1, suitable for under-hood automotive applications |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Storing user-defined I/O mapping, alarm thresholds, and calibration offsets in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile configuration register bank accessed via I²C during boot and runtime reconfiguration. Use Value: Enables field-upgradable settings without firmware reflashing; 200-year data retention ensures parameter persistence across equipment lifecycle. |
Use Scenario: Holding seat position memory, mirror angle presets, and lighting profiles in automotive BCMs exposed to under-dash thermal stress. IC Role / Device Role / Timing Role: AEC-Q100-qualified EEPROM providing fault-tolerant storage for personalized vehicle settings. Use Value: WP pin prevents accidental overwrites during CAN/LIN bus activity; -40°C to +125°C rating matches under-hood ambient requirements. |
| Smart Sensor Calibration Data | AC-DC Power Supply Parameter Backup |
Use Scenario: Retaining factory-trimmed sensor gain/offset coefficients and temperature compensation tables in MEMS pressure or humidity sensors. IC Role / Device Role / Timing Role: High-reliability data vault accessed once per sensor initialization to load correction parameters into ADC/DAC registers. Use Value: 1 million endurance cycles support repeated recalibration in service; 16-byte page writes reduce I²C transaction count during multi-parameter updates. |
Use Scenario: Saving output voltage/current limits, soft-start timing, and fault recovery settings in digitally controlled AC-DC adapters and server PSUs. IC Role / Device Role / Timing Role: Secure configuration store that survives power loss and maintains compliance-critical safety margins. Use Value: Hardware WP prevents corruption during brown-out events; 2.5V minimum VCC allows operation during low-line conditions prior to regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA04T-I/ST | Lower VCC min (1.7V), same 400 kHz speed, Industrial temp only (-40°C to +85°C) | Preferred for battery-powered or low-voltage systems where 2.5V operation is not guaranteed | Select when wider supply range is required and extended temperature is unnecessary |
| 24FC04T-E/ST | 1 MHz max clock, 1.7–5.5V VCC, identical package and pinout | Required for high-throughput I²C buses needing faster write/read rates in automotive infotainment or ADAS subsystems | Choose only if 1 MHz timing is mandatory; otherwise 24LC04BT-E/ST offers better cost/performance balance |
Compared with 24AA04T-I/ST, the 24LC04BT-E/ST trades lower voltage operation for extended temperature capability; compared with 24FC04T-E/ST, it sacrifices 1 MHz speed for tighter qualification to AEC-Q100 Grade 1 and broader industrial acceptance.
Availability
24LC04BT-E/ST is available at Aetrix Electronics and suitable for industrial control systems, automotive electronics, and power management applications requiring stable component supply, long-term obsolescence planning, and AEC-Q100-compliant sourcing.
Supply support for 24LC04BT-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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 24LC04B family is part of Microchip's serial EEPROM product line, designed specifically for reliable, low-power, I²C-based nonvolatile storage in space-constrained, thermally demanding embedded systems.
FAQ
What is the minimum supply voltage required for reliable operation of the 24LC04BT-E/ST?
The 24LC04BT-E/ST requires a minimum VCC of 2.5V for guaranteed functionality across its full temperature range. Operation below 2.5V is not supported - unlike the 24AA04 or 24FC04 variants, which operate down to 1.7V. This constraint ensures stable internal charge pump performance and EEPROM cell programming margin at extended temperatures.
Does the 24LC04BT-E/ST support 1 MHz I²C communication?
No, the 24LC04BT-E/ST does not support 1 MHz I²C. Its maximum clock frequency is 400 kHz, as specified in the Device Selection Table and confirmed in AC Characteristics (Table 1-2). The 1 MHz capability is exclusive to the 24FC04 variant; using 24LC04BT-E/ST on a 1 MHz bus will result in communication failures or data corruption.
How is write protection implemented on the 24LC04BT-E/ST?
Write protection on the 24LC04BT-E/ST is implemented exclusively via the WP pin: when tied to VCC, the entire memory array (addresses 000–1FF) is locked against write operations, including byte and page writes. Read operations remain fully functional. No software command or internal register setting can override this hardware-enforced lock.
What package type does the 24LC04BT-E/ST use, and is it RoHS compliant?
The 24LC04BT-E/ST uses an 8-lead SOIC (SN) package with 3.90 mm body width and gull-wing leads, per Microchip drawing C04-057-SN Rev F. It is RoHS compliant, lead-free, and meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) requirements for surface-mount assembly.
Can the 24LC04BT-E/ST be used in automotive applications?
Yes, the 24LC04BT-E/ST is AEC-Q100 qualified for Grade 1 (-40°C to +125°C) and explicitly listed in the "Automotive AEC-Q100 Qualified" feature list. Its extended temperature rating, hardware write protection, and 1 million endurance cycles make it suitable for body control modules, engine management peripherals, and other under-hood automotive subsystems.
24LC04BT-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:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 4Kbit
- Memory Organization:
- 256 x 8 x 2
- 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
24LC04BT-E/ST FAQ
1.How can I place an order for 24LC04BT-E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC04BT-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 24LC04BT-E/ST reliable?
The price and inventory of 24LC04BT-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 24LC04BT-E/ST is usually 5 days.
3.What payment methods are accepted for 24LC04BT-E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC04BT-E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC04BT-E/ST?
24LC04BT-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC04BT-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 24LC04BT-E/ST?
For technical support, including 24LC04BT-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC04BT-E/ST requirements.
6.How does Aetrix verify that 24LC04BT-E/ST is sourced from the original manufacturer or authorized distributors?
All 24LC04BT-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 24LC04BT-E/ST meets industry standards.
7.What is the process for return or replacement of 24LC04BT-E/ST?
All 24LC04BT-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC04BT-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 24LC04BT-E/ST part is unused and in its original packaging.
Return procedure for 24LC04BT-E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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