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Microchip Technology 24LC04BT-E/SNG
- Part No.:
- 24LC04BT-E/SNG
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24LC04BT-E/SNG.pdf
- Description:
- IC EEPROM 4KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,131
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Product details
Overview
24LC04BT-E/SNG 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 for nonvolatile parameter storage in industrial control modules, sensor calibration data retention, and configuration memory in embedded systems.
For engineers reviewing the 24LC04BT-E/SNG datasheet, 24LC04BT-E/SNG pinout, 24LC04BT-E/SNG application, or 24LC04BT-E/SNG equivalent, key selection criteria include its extended temperature range (–40°C to +125°C), 16-byte page buffer, Schmitt-trigger inputs for noise immunity, and compatibility with standard I²C bus timing at 400 kHz under 2.5V–5.5V supply.
Technical Context
The 24LC04BT-E/SNG implements a two-wire I²C interface with fixed 4-bit device code '1010', block-select addressing (B0 bit), and R/W bit control. Its internal architecture includes an EEPROM array, page latches, X/Y decoders, sense amplifiers, and HV generator for programming - all managed by memory control logic synchronized to SCL.
It supports byte and page write modes, with automatic address pointer incrementation and wraparound on page boundary overflow. Acknowledge polling enables host-driven write-cycle completion detection, and Schmitt-trigger inputs plus output slope control suppress ground bounce and bus noise during high-speed operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Kbit (2 × 256 × 8-bit blocks), enabling compact firmware parameter or calibration storage without external address decoding. |
| Supply Voltage | 2.5V–5.5V - compatible with 3.3V and 5V logic domains; excludes sub-2.5V operation unlike 24AA04/24FC04 variants. |
| Max Clock Frequency | 400 kHz - supports standard-mode I²C timing; not rated for 1 MHz (reserved for 24FC04). |
| Page Write Buffer | 16 bytes - allows burst writes within one physical page (0–15, 16–31, etc.), reducing bus overhead vs. byte-by-byte writes. |
| Write Cycle Time | 5 ms maximum - defines minimum inter-write interval; self-timed erase/write eliminates need for external delay management. |
| Endurance & Retention | 1 million erase/write cycles and >200 years data retention - suitable for field-updatable configuration storage in long-lifecycle products. |
| Temperature Range | –40°C to +125°C (Extended grade) - qualified for under-hood automotive, industrial motor drives, and harsh-environment sensing nodes. |
Pinout & Package
24LC04BT-E/SNG uses an 8-lead SOIC (SN) package per Microchip drawing C04-057-SN Rev F: 3.90 mm body width, 1.27 mm pitch, gull-wing leads. Pins A0–A2 are unconnected (NC); VSS and VCC provide power; SDA and SCL implement bidirectional I²C communication; WP enables hardware write protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | No-connect (NC) | Internally unconnected; may be left floating or tied to VSS/VCC with no functional impact - simplifies PCB routing and eliminates address conflicts. |
| VSS | Ground reference | Return path for all internal circuitry; must be low-impedance to ensure stable read/write margins and noise immunity. |
| SDA | Serial Data I/O | Open-drain bidirectional bus line requiring external pull-up (2 kΩ typical for 400 kHz); changes only during SCL low to avoid spurious Start/Stop conditions. |
| SCL | Serial Clock input | Master-generated clock synchronizing all data transfers; rising edge samples SDA, falling edge drives SDA - dictates maximum bus speed and timing compliance. |
| WP | Write-Protect input | Logic-high (VCC) disables all write operations across full 000–1FF address space; logic-low (VSS) enables normal read/write - provides tamper-resistant configuration lock. |
| VCC | Power supply | 2.5V–5.5V supply powering EEPROM core, interface logic, and HV generator; bypass capacitor (0.1 µF) required near pin for transient stability. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Input hysteresis ≥0.05×VCC ensures reliable signal recognition on noisy industrial buses, eliminating false triggering from EMI or crosstalk. |
| Output slope control | Controlled SDA/SCL rise/fall times prevent ground bounce and overshoot, maintaining I²C bus integrity without external RC networks. |
| Hardware write-protect | Single-pin (WP) global lock prevents accidental overwrites during power-up/down or firmware updates - critical for safety-critical configuration storage. |
| 16-byte page write buffer | Reduces I²C transaction count by up to 16× vs. byte writes, lowering bus arbitration overhead and improving system-level throughput in multi-device environments. |
| ESD protection >4 kV | HBM-rated protection enables robust handling during assembly and field service, reducing failure rates in manual-rework or connector-mating scenarios. |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Storing calibrated sensor offsets, module identification codes, and fault history logs in programmable logic controller I/O cards operating in factory-floor environments. IC Role / Device Role / Timing Role: Nonvolatile configuration memory providing persistent parameter storage between power cycles and firmware updates. Use Value: Enables field recalibration without reprogramming firmware; 125°C rating ensures reliability near motor drives and power supplies. |
Use Scenario: Retaining door lock settings, mirror position memory, and lighting configuration profiles in automotive body electronics exposed to under-hood thermal cycling. IC Role / Device Role / Timing Role: AEC-Q100 qualified EEPROM serving as secure, tamper-resistant storage for user preferences and system state. Use Value: Hardware WP pin prevents unintended writes during CAN bus transients; >200-year data retention guarantees lifetime vehicle usability. |
| Medical Diagnostic Sensors | Smart Energy Meters |
Use Scenario: Holding calibration coefficients and sensor health metrics in portable blood glucose monitors and pulse oximeters requiring regulatory-compliant data persistence. IC Role / Device Role / Timing Role: Low-power, high-reliability memory for traceable calibration data that must survive battery replacement and sterilization cycles. Use Value: 1 µA standby current extends battery life; 1M endurance supports daily recalibration over 10+ years of clinical use. |
Use Scenario: Recording tariff schedules, metering event logs, and firmware version stamps in utility-grade electricity meters deployed in outdoor enclosures. IC Role / Device Role / Timing Role: Tamper-evident configuration storage with write-lock capability to meet ANSI C12.1 and IEC 62056 compliance requirements. Use Value: WP pin integration allows secure firmware update sequencing; extended temperature range ensures accuracy across –40°C winter and +85°C summer extremes. |
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/SN | Lower VCC min (1.7V), 400 kHz max, Industrial temp only (–40°C to +85°C) | Not qualified for extended-temp automotive or industrial edge nodes; suitable for cost-sensitive consumer or office equipment. | Select when 1.7V operation is mandatory and extended temperature is unnecessary. |
| 24FC04T-E/SN | 1 MHz max clock, 1.7V–5.5V VCC, same extended temp range | Enables higher-throughput logging in bandwidth-constrained systems; requires stricter AC timing validation at 1 MHz. | Select when faster write throughput justifies additional timing margin analysis and layout optimization. |
Compared with 24LC04BT-E/SNG, the 24AA04T-I/SN trades extended temperature for ultra-low-voltage operation, while the 24FC04T-E/SN adds 1 MHz speed at identical packaging and qualification - making the 24LC04BT-E/SNG the optimal balance of ruggedness, compatibility, and design simplicity for industrial and automotive applications.
Availability
24LC04BT-E/SNG is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, medical sensor calibration, and smart energy metering requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 24LC04BT-E/SNG 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 manufacturing and support infrastructure.
The 24LC04B family delivers cost-effective, AEC-Q100 qualified serial EEPROMs optimized for reliable nonvolatile storage in automotive, industrial, and medical applications where extended temperature operation and hardware write protection are essential.
FAQ
What is the operating voltage range for the 24LC04BT-E/SNG?
The 24LC04BT-E/SNG operates from 2.5V to 5.5V. Unlike the 24AA04 or 24FC04 variants, it is not rated for sub-2.5V operation. This ensures stable I²C communication and EEPROM programming margins across 3.3V and 5V system rails, and is validated for performance across its full –40°C to +125°C extended temperature range.
Does the 24LC04BT-E/SNG support 1 MHz I²C clock speed?
No, the 24LC04BT-E/SNG is rated for a maximum clock frequency of 400 kHz. The 1 MHz capability is exclusive to the 24FC04 variant. Attempting 1 MHz operation with the 24LC04BT-E/SNG violates AC timing specifications and may result in unreliable acknowledge responses or write failures, especially at lower VCC or elevated temperatures.
How does the WP pin function on the 24LC04BT-E/SNG?
The WP (Write-Protect) pin on the 24LC04BT-E/SNG provides hardware-level write inhibition: when tied to VCC, the entire 4-Kbit memory array (addresses 000–1FF) becomes read-only; when tied to VSS, full read/write access is enabled. This feature is active immediately upon power-up and requires no software initialization, ensuring robust protection against accidental writes during boot or reset sequences.
What is the page size and write buffer capacity of the 24LC04BT-E/SNG?
The 24LC04BT-E/SNG has a 16-byte page write buffer and enforces physical page boundaries aligned to 16-byte offsets (0–15, 16–31, etc.). A page write command crossing a boundary wraps data to the start of the same page instead of advancing to the next. To avoid data corruption, host firmware must segment multi-byte writes to stay within page limits before issuing the Stop condition.
Is the 24LC04BT-E/SNG AEC-Q100 qualified?
Yes, the 24LC04BT-E/SNG is AEC-Q100 qualified for Grade 1 (–40°C to +125°C), confirming its suitability for automotive applications including body control modules, infotainment peripherals, and ADAS subsystems. This qualification covers stress testing for temperature cycling, humidity, ESD, and electrical performance across the full extended temperature range.
24LC04BT-E/SNG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not 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-SOIC
24LC04BT-E/SNG FAQ
1.How can I place an order for 24LC04BT-E/SNG through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC04BT-E/SNG 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/SNG reliable?
The price and inventory of 24LC04BT-E/SNG 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/SNG is usually 5 days.
3.What payment methods are accepted for 24LC04BT-E/SNG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC04BT-E/SNG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC04BT-E/SNG?
24LC04BT-E/SNG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC04BT-E/SNG 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/SNG?
For technical support, including 24LC04BT-E/SNG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC04BT-E/SNG requirements.
6.How does Aetrix verify that 24LC04BT-E/SNG is sourced from the original manufacturer or authorized distributors?
All 24LC04BT-E/SNG 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/SNG meets industry standards.
7.What is the process for return or replacement of 24LC04BT-E/SNG?
All 24LC04BT-E/SNG units undergo pre-shipment inspection (PSI). If there is an issue with 24LC04BT-E/SNG, 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/SNG part is unused and in its original packaging.
Return procedure for 24LC04BT-E/SNG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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