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Microchip Technology 24AA04HT-I/MS
- Part No.:
- 24AA04HT-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
24AA04HT-I/MS.pdf
- Description:
- IC EEPROM 4KBIT I2C 400KHZ 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,778
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Product details
Overview
24AA04HT-I/MS from Microchip Technology Inc. is a 4-Kbit I²C-compatible serial EEPROM organized as two 256 × 8-bit blocks, operating from 1.7V to 5.5V with 400 kHz max clock frequency, 1 µA standby current, and hardware write-protect for the upper half-array (100h–1FFh). It targets embedded system configuration storage in industrial controllers and sensor nodes.
For engineers reviewing the 24AA04HT-I/MS datasheet, 24AA04HT-I/MS pinout, 24AA04HT-I/MS application, or 24AA04HT-I/MS equivalent, key selection criteria include low-voltage operation down to 1.7V, MSOP-8 packaging, half-array write-protection via WP pin, and compatibility with standard I²C timing at 400 kHz across –40°C to +85°C.
Technical Context
The 24AA04HT-I/MS 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 buffer enables efficient page writes.
Write protection is implemented via the WP pin: tied to VSS for full memory access (000h–1FFh), or to VCC to lock writes to addresses 100h–1FFh only. The device uses self-timed erase/write cycles with no external timing components required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Kbit (512 bytes), organized as two independent 256 × 8-bit blocks for flexible addressing |
| Supply Voltage | 1.7V–5.5V - enables direct integration into ultra-low-power systems powered by single-cell Li-ion or coin cells |
| Max Clock Frequency | 400 kHz at VCC ≥ 2.5V; 100 kHz at 1.7V ≤ VCC < 2.5V - ensures reliable I²C communication across wide voltage range |
| Write Cycle Time | ≤5 ms per byte or page - defines minimum interval between successive write commands without polling |
| Endurance | 1,000,000 erase/write cycles - supports long-term field deployment in firmware parameter logging |
| Data Retention | >200 years at +25°C - guarantees nonvolatile storage integrity over product lifetime without refresh |
| Operating Temperature | –40°C to +85°C (Industrial grade) - qualified for use in factory automation and outdoor metering equipment |
Pinout & Package
24AA04HT-I/MS is housed in an 8-lead MSOP package (3.0 mm × 3.0 mm × 1.0 mm body height), optimized for space-constrained PCB layouts in portable and industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | Device Address Inputs | No internal connection - may be left floating or tied to VSS/VCC without affecting function or I²C address |
| VSS | Ground Reference | System return path for all internal logic and I/O; must be low-impedance for stable EEPROM operation |
| SDA | Serial Data I/O | Open-drain bidirectional bus line requiring external pull-up resistor (2 kΩ typical for 400 kHz) |
| SCL | Serial Clock Input | Master-generated clock synchronizing all data transfers; accepts standard I²C timing waveforms |
| WP | Write-Protect Control | Logic-high disables writes to upper 256-byte block (100h–1FFh); critical for safeguarding calibration data |
| VCC | Power Supply | Single supply input supporting 1.7V–5.5V; powers internal EEPROM array and I²C interface logic |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | Functional down to 1.7V - eliminates need for level shifters when interfacing with 1.8V microcontrollers |
| Page Write Buffer | 16-byte buffer - reduces I²C transaction count by up to 16× versus byte-write mode, improving bus efficiency |
| Noise Immunity | Schmitt-trigger inputs + 50 ns input filter - rejects EMI spikes on SDA/SCL lines in electrically noisy environments |
| Hardware Write Protection | Dedicated WP pin enabling selective lock of upper memory block - prevents accidental overwrite of critical firmware parameters |
| High Endurance | 1 million write cycles - supports frequent updates in real-time configuration storage (e.g., motor tuning tables) |
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: Nonvolatile configuration storage accessed during power-on initialization via I²C. Use Value: Ensures measurement accuracy remains traceable across device lifecycle without requiring recalibration after firmware updates. |
Use Scenario: Holding user-adjustable therapy parameters (e.g., infusion rate limits, alarm thresholds) in portable insulin pumps. IC Role / Device Role / Timing Role: Secure, low-power parameter retention between battery replacements. Use Value: Guarantees patient-safety-critical settings persist even after extended storage or deep discharge events. |
| Smart Energy Metering | Automotive Body Control Module |
|
Use Scenario: Recording tamper-detection timestamps and tariff-switching history in DIN-rail-mounted electricity meters. IC Role / Device Role / Timing Role: High-endurance data logger interfaced to MCU over I²C with WP pin grounded for full write access. Use Value: Withstands >1M write cycles needed for daily billing logs over 10+ year service life. |
Use Scenario: Storing seat position memory, mirror presets, and lighting profiles in automotive door modules. IC Role / Device Role / Timing Role: AEC-Q100-qualified nonvolatile storage accessed during vehicle power-up sequence. Use Value: Maintains personalized settings across ignition cycles while meeting automotive temperature and reliability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC04BHT-I/MS | Requires minimum 2.5V VCC; same 400 kHz speed and MSOP-8 package | Not suitable for sub-2.5V systems (e.g., energy-harvesting sensors) | Select when operating from 3.3V/5V rails only and cost sensitivity outweighs voltage flexibility |
| AT24C04D-MAHM-T | Same 4-Kbit capacity, 1.7V–5.5V, but rated for -40°C to +125°C (AEC-Q100 Grade 0) | Better suited for under-hood automotive applications requiring extended temperature support | Choose for new designs targeting AEC-Q100 Grade 0 compliance where 24AA04HT-I/MS's Industrial grade is insufficient |
Compared with 24LC04BHT-I/MS, the 24AA04HT-I/MS enables lower-voltage operation critical for battery-powered devices; compared with AT24C04D-MAHM-T, it offers identical voltage range but lacks extended temperature qualification, making it optimal for cost-sensitive industrial control where -40°C to +85°C suffices.
Availability
24AA04HT-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and smart energy metering requiring stable component supply across multi-year production cycles.
Supply support for 24AA04HT-I/MS 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 24AA04H family delivers cost-effective, low-power serial EEPROMs designed specifically for configuration storage and parameter retention in resource-constrained embedded systems across industrial, medical, and consumer markets.
FAQ
What is the I²C address of the 24AA04HT-I/MS and how is it configured?
The 24AA04HT-I/MS uses a fixed 4-bit device code of '1010' followed by two "don't care" bits and a block-select bit (B0), resulting in client addresses 0xA0/A1 (block 0) or 0xA2/A3 (block 1). Unlike larger EEPROMs, pins A0–A2 have no internal connection and do not affect addressing - the 24AA04HT-I/MS always responds to these four base addresses regardless of their external state.
Does the 24AA04HT-I/MS support 1 MHz I²C operation?
No, the 24AA04HT-I/MS is rated for maximum 400 kHz I²C clock frequency at VCC ≥ 2.5V and 100 kHz below 2.5V. It does not support 1 MHz operation - that capability is exclusive to the 24FC04H variant. Attempting 1 MHz signaling with the 24AA04HT-I/MS will result in timing violations and unreliable communication.
How does the WP pin protect memory in the 24AA04HT-I/MS?
When the WP pin of the 24AA04HT-I/MS is tied to VCC, write operations to addresses 100h–1FFh (upper 256-byte block) are inhibited; reads remain fully functional. Addresses 000h–0FFh (lower block) remain writable. This allows safe storage of immutable calibration data in the protected region while permitting runtime updates to volatile configuration in the unprotected region.
What is the purpose of the 16-byte page buffer in the 24AA04HT-I/MS?
The 16-byte page buffer in the 24AA04HT-I/MS enables page write mode: up to 16 contiguous bytes can be loaded into the buffer and written to memory in a single internal cycle. This reduces I²C bus overhead by up to 16× versus individual byte writes, significantly accelerating bulk configuration updates - for example, writing a full sensor calibration table in one transaction instead of 16 separate ones.
Is the 24AA04HT-I/MS AEC-Q100 qualified?
The 24AA04HT-I/MS carries Industrial temperature grade (–40°C to +85°C) and is not AEC-Q100 qualified. While Microchip's 24XX04H family includes AEC-Q100-qualified variants (e.g., 24LC04BH with E-temp grade), the 24AA04HT-I/MS part number specifically denotes Industrial-grade qualification only. For automotive applications requiring AEC-Q100, alternate part numbers must be selected.
24AA04HT-I/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
24AA04HT-I/MS FAQ
1.How can I place an order for 24AA04HT-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA04HT-I/MS 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 24AA04HT-I/MS reliable?
The price and inventory of 24AA04HT-I/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24AA04HT-I/MS is usually 5 days.
3.What payment methods are accepted for 24AA04HT-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA04HT-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA04HT-I/MS?
24AA04HT-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA04HT-I/MS 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 24AA04HT-I/MS?
For technical support, including 24AA04HT-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA04HT-I/MS requirements.
6.How does Aetrix verify that 24AA04HT-I/MS is sourced from the original manufacturer or authorized distributors?
All 24AA04HT-I/MS 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 24AA04HT-I/MS meets industry standards.
7.What is the process for return or replacement of 24AA04HT-I/MS?
All 24AA04HT-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 24AA04HT-I/MS, 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 24AA04HT-I/MS part is unused and in its original packaging.
Return procedure for 24AA04HT-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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