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Microchip Technology 24LC04BHT-E/ST
- Part No.:
- 24LC04BHT-E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC04BHT-E/ST.pdf
- Description:
- IC EEPROM 4KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,803
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Product details
Overview
24LC04BHT-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, 1 µA standby current, and hardware write-protect for half-array (100h–1FFh), used in industrial sensor calibration storage and embedded system configuration retention.
For engineers reviewing the 24LC04BHT-E/ST datasheet, 24LC04BHT-E/ST pinout, 24LC04BHT-E/ST application, or 24LC04BHT-E/ST equivalent, key selection criteria include VCC range (2.5–5.5V), extended temperature support (–40°C to +125°C), 16-byte page write buffer, I²C bus timing compliance, and half-array hardware write-protection functionality.
Technical Context
The 24LC04BHT-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 counter supports current-address, random, and sequential read modes, while the 16-byte page write buffer enables efficient bulk writes within physical page boundaries (00h–0Fh, 10h–1Fh, etc.).
Write protection is implemented via the WP pin: tied to VSS for full array access (000h–1FFh), tied to VCC to lock addresses 100h–1FFh while allowing reads and writes to 000h–0FFh. Acknowledge polling is supported to detect write cycle completion without fixed delay timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Kbit (512 bytes), organized as two 256 × 8-bit blocks for independent addressing |
| VCC Range | 2.5V to 5.5V - ensures compatibility with 3.3V and 5V logic systems in extended-temp environments |
| Max Clock Frequency | 400 kHz - defines maximum I²C bus speed under all valid VCC and temperature conditions |
| Page Write Buffer | 16 bytes - limits single write transaction size to prevent crossing physical page boundaries (00h–0Fh, etc.) |
| Write Protection | Hardware-enabled half-array (100h–1FFh) - prevents accidental overwrites of critical firmware or calibration data |
| Endurance & Retention | 1 million erase/write cycles; >200 years data retention - suitable for long-life industrial deployments |
| Temperature Range | –40°C to +125°C (Extended grade) - qualified for under-hood automotive and harsh industrial use |
Pinout & Package
24LC04BHT-E/ST is supplied in an 8-lead SOIC package (SN) with standard 1.27 mm pitch, 3.90 mm body width, and JEDEC MS-012AC footprint. Pin 1 is marked by a beveled corner or dot; device orientation follows industry-standard SOIC convention.
| 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 per device architecture; no impact on I²C client address |
| A2 | Address Input | No internal connection - not part of 24LC04BH address decoding; ignored during bus arbitration |
| VSS | Ground Reference | Primary return path for all internal circuitry; must be low-impedance connection to system GND |
| SDA | Serial Data I/O | Open-drain bidirectional bus line requiring external pull-up (2 kΩ typical for 400 kHz) |
| SCL | Serial Clock Input | Input-only clock line synchronized to host controller; determines maximum I²C transfer rate |
| WP | Write-Protect Control | Logic-high disables writes to 100h–1FFh; logic-low enables full-array read/write access |
| VCC | Power Supply | Single supply input (2.5–5.5V); powers EEPROM core, interface logic, and internal HV generator |
Key Features
| Feature | Design Value |
|---|---|
| I²C Bus Compatibility | Fully compliant with Philips I²C specification - interoperable with standard microcontroller I²C peripherals without protocol translation |
| Schmitt Trigger Inputs | 0.05 VCC hysteresis on SDA/SCL - rejects noise spikes up to 50 ns, enabling reliable operation in electrically noisy environments |
| Page Write Time | ≤5 ms maximum self-timed write cycle - eliminates need for external timing control or busy-wait loops |
| ESD Robustness | ≥4,000 V HBM - protects against handling damage and system-level ESD events in manufacturing and field use |
| Automotive Qualification | AEC-Q100 Grade 1 qualified - validated for automotive applications including engine control and body electronics |
Applications
| Industrial Sensor Calibration Storage | Embedded System Configuration Retention |
|---|---|
Use Scenario: Storing factory-calibrated coefficients and offset values for temperature, pressure, and humidity sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile memory holding persistent calibration data accessed at power-up and updated only during maintenance or recalibration. Use Value: Enables field-replaceable sensor modules without reprogramming host firmware; maintains accuracy across power cycles and thermal drift. | Use Scenario: Retaining user-defined settings (network IP, display brightness, alarm thresholds) in medical infusion pumps and diagnostic equipment. IC Role / Device Role / Timing Role: I²C slave device providing byte- and page-write capability for infrequent but critical configuration updates. Use Value: Guarantees parameter persistence after battery removal or unexpected shutdown; supports >1M write cycles for lifetime service intervals. |
| Automotive Body Control Module (BCM) | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Storing seat position memory, mirror angle presets, and lighting profiles in AEC-Q100-compliant body control units. IC Role / Device Role / Timing Role: Extended-temperature EEPROM interfacing directly with BCM microcontroller over 400 kHz I²C bus. Use Value: Supports –40°C to +125°C operation without derating; hardware write-protect prevents corruption of safety-critical user preferences. | Use Scenario: Holding firmware patch images and version metadata in utility-grade smart meters deployed in outdoor enclosures. IC Role / Device Role / Timing Role: Secure, long-retention storage for verified firmware updates applied during scheduled maintenance windows. Use Value: >200-year data retention ensures patch integrity over meter lifetime; 16-byte page writes optimize update throughput within constrained MCU RAM. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA04HT-I/ST | Lower VCC min (1.7V), same 400 kHz max clock, Industrial temp only (–40°C to +85°C) | Not rated for extended temperature; unsuitable for under-hood or high-ambient industrial use | Select when 1.7V operation is required and ambient temperature remains ≤+85°C |
| 24FC04HT-E/ST | 1 MHz max clock, 1.7–5.5V VCC range, same extended temp rating and package | Higher-speed I²C support enables faster configuration loading in bandwidth-constrained systems | Select when system clock exceeds 400 kHz and full voltage range compatibility is needed |
Compared with 24AA04HT-I/ST, the 24LC04BHT-E/ST trades 1.7V operation for extended temperature qualification and automotive compliance; compared with 24FC04HT-E/ST, it sacrifices 1 MHz speed for tighter VCC regulation and proven robustness in legacy 400 kHz designs.
Availability
24LC04BHT-E/ST is available at Aetrix Electronics and suitable for industrial sensor calibration storage, embedded system configuration retention, and automotive body control module applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 24LC04BHT-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 24LC04BH family is designed for reliable, low-power nonvolatile data storage in space-constrained embedded systems where I²C interface simplicity, extended temperature operation, and hardware write protection are essential.
FAQ
What is the operating voltage range for the 24LC04BHT-E/ST?
The 24LC04BHT-E/ST operates from 2.5V to 5.5V DC. This range ensures compatibility with both 3.3V and 5V logic families while maintaining full functionality across its extended temperature range (–40°C to +125°C). Operation below 2.5V is not supported and may result in unreliable write cycles or communication failure. The 24LC04BHT-E/ST datasheet explicitly specifies this VCC window as absolute minimum and maximum for guaranteed performance.
Does the 24LC04BHT-E/ST support 1 MHz I²C clock speed?
No, the 24LC04BHT-E/ST supports a maximum clock frequency of 400 kHz under all valid operating conditions. While the related 24FC04H variant supports 1 MHz, the 24LC04BHT-E/ST is characterized and specified only up to 400 kHz - even at 5.5V and 25°C. Attempting 1 MHz operation on the 24LC04BHT-E/ST violates AC timing specifications and risks data corruption or bus lockup.
How does hardware write-protection work on the 24LC04BHT-E/ST?
Hardware write-protection on the 24LC04BHT-E/ST is controlled by the WP pin: when tied to VCC, writes to memory addresses 100h–1FFh are inhibited while reads remain functional; when tied to VSS, full-array (000h–1FFh) read/write access is enabled. This protection is active during power-up and requires no software command. The 24LC04BHT-E/ST implements this at the silicon level, making it immune to firmware errors or bus glitches.
Can the 24LC04BHT-E/ST be used in automotive applications?
Yes, the 24LC04BHT-E/ST is AEC-Q100 qualified for automotive use and rated for extended temperature operation (–40°C to +125°C). It meets stress testing requirements for vibration, thermal cycling, and ESD (≥4,000 V HBM), making it suitable for body control modules, instrument clusters, and other non-safety-critical automotive subsystems. Its 1 million endurance cycles and >200-year data retention further support long-service-life vehicle platforms.
What package type is used for the 24LC04BHT-E/ST?
The 24LC04BHT-E/ST is packaged in an 8-lead SOIC (Small Outline Integrated Circuit) with narrow 3.90 mm body width, designated as "SN" by Microchip. Its footprint conforms to JEDEC MS-012AC standards, with 1.27 mm lead pitch and recommended land pattern dimensions of 1.55 mm pad length and 0.60 mm pad width. This package is compatible with standard surface-mount assembly processes and reflow profiles.
24LC04BHT-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:
- 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
24LC04BHT-E/ST FAQ
1.How can I place an order for 24LC04BHT-E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC04BHT-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 24LC04BHT-E/ST reliable?
The price and inventory of 24LC04BHT-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 24LC04BHT-E/ST is usually 5 days.
3.What payment methods are accepted for 24LC04BHT-E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC04BHT-E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC04BHT-E/ST?
24LC04BHT-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC04BHT-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 24LC04BHT-E/ST?
For technical support, including 24LC04BHT-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC04BHT-E/ST requirements.
6.How does Aetrix verify that 24LC04BHT-E/ST is sourced from the original manufacturer or authorized distributors?
All 24LC04BHT-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 24LC04BHT-E/ST meets industry standards.
7.What is the process for return or replacement of 24LC04BHT-E/ST?
All 24LC04BHT-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC04BHT-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 24LC04BHT-E/ST part is unused and in its original packaging.
Return procedure for 24LC04BHT-E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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