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Microchip Technology 24AA024HT-I/ST
- Part No.:
- 24AA024HT-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24AA024HT-I/ST.pdf
- Description:
- IC EEPROM 2KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,790
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Product details
Overview
24AA024HT-I/ST from Microchip Technology Inc. is a 2 Kbit I²C-compatible serial EEPROM organized as 256 × 8-bit memory, operating from 1.7V to 5.5V with industrial temperature range (−40°C to +85°C), 400 μA max active current, and hardware write protection for addresses 80h–FFh. It serves as nonvolatile configuration storage in embedded control modules requiring low-voltage operation and noise-immune bus interfacing.
For engineers reviewing the 24AA024HT-I/ST datasheet, 24AA024HT-I/ST pinout, 24AA024HT-I/ST application, or 24AA024HT-I/ST equivalent, this page delivers verified electrical specs, validated 8-pin TSSOP package mapping, confirmed I²C timing compliance up to 400 kHz, and real-world use cases in secure device identity and calibration data retention.
Technical Context
The 24AA024HT-I/ST implements a two-wire I²C interface with Schmitt-trigger inputs on SDA and SCL pins, enabling robust noise suppression and spike rejection ≥50 ns. Its internal address counter supports current-address, random, and sequential read modes, while the 16-byte page write buffer enables efficient bulk writes without host-side address management.
Hardware write protection is controlled solely by the WP pin state: tied to VCC, it locks the upper half (128 bytes) of the array; tied to VSS, full array access is permitted. The device uses an internal high-voltage generator and auto-erase logic to complete self-timed write cycles within 5 ms, independent of host clocking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit), single-block organization enabling contiguous addressing without bank switching |
| VCC Operating Range | 1.7V to 5.5V - supports direct connection to 1.8V, 3.3V, and 5V logic domains without level shifters |
| Max Clock Frequency | 400 kHz at VCC ≥ 1.8V - ensures compatibility with standard I²C fast-mode controllers |
| Write Endurance | 1 million erase/write cycles - guarantees long-term reliability in firmware update or logging applications |
| Data Retention | 200 years at +25°C - meets extended-life requirements for medical, industrial, and infrastructure equipment |
| Standby Current | 1 μA max - enables battery-backed operation in always-on sensor nodes and IoT edge devices |
| Page Write Buffer | 16 bytes - reduces I²C transaction overhead by up to 87% versus byte-write for typical 12–16 byte configuration records |
Pinout & Package
24AA024HT-I/ST is packaged in an 8-pin TSSOP (3.0 mm × 4.4 mm, 0.65 mm pitch) with gull-wing leads, RoHS-compliant matte tin finish, and moisture sensitivity level (MSL) 1 per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Chip Select Input | User-configurable address bit; sets LSB of 7-bit slave address (1010xxx) to enable up to eight devices on one I²C bus |
| A1 | Chip Select Input | Second chip select bit; combined with A0 and A2, determines unique I²C address for multi-device systems |
| A2 | Chip Select Input | MSB of chip select; allows hardware-based device selection without software address remapping |
| VSS | Ground Reference | Primary return path for all internal logic and I/O; must be connected before VCC to prevent latch-up |
| SDA | Serial Data I/O | Open-drain bidirectional line; requires external pull-up resistor (2 kΩ typical for 400 kHz operation) |
| SCL | Serial Clock Input | Master-generated clock; Schmitt-trigger input ensures reliable edge detection under noisy conditions |
| WP | Hardware Write-Protect | Logic-high (VCC) enables write lock on upper 128 bytes (80h–FFh); no software intervention required |
| VCC | Power Supply | Single supply input; internal voltage detector disables write logic below 1.5V to prevent partial writes |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | Functional down to 1.7V VCC - eliminates need for external regulators in energy-harvesting or coin-cell-powered designs |
| Noise-Immune I²C Interface | Schmitt-trigger inputs + 50 ns input filter - suppresses EMI-induced glitches without external RC filtering |
| Output Slope Control | Controlled SDA/SCL rise/fall times - prevents ground bounce and signal integrity issues on shared PCB traces |
| Half-Array Hardware Write Protection | WP pin directly gates erase/write to 80h–FFh - provides tamper-resistant storage for MAC addresses or calibration constants |
| Contiguous Multi-Device Expansion | A0–A2 bits map to address bits A9–A11 - enables 16 Kbit logical memory space using eight devices on one bus |
Applications
| Industrial Sensor Node | Medical Device Calibration |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients and sensor ID in a battery-powered environmental monitor. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with guaranteed 200-year data retention and 1 μA standby draw. Use Value: Eliminates recalibration during field deployment and extends maintenance intervals beyond product lifetime. |
Use Scenario: Securing unique device identifiers and regulatory-compliant calibration logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Tamper-resistant storage for FDA-required traceability data, protected via WP pin hardwired to VCC. Use Value: Meets IEC 62304 software safety requirements by preventing accidental overwrites of critical calibration records. |
| Smart Meter Firmware Patch Storage | Automotive Body Control Module |
Use Scenario: Holding encrypted firmware patch metadata and version history in utility-grade smart meters with 15+ year service life. IC Role / Device Role / Timing Role: High-endurance (1M cycle) EEPROM used for infrequent but mission-critical update tracking. Use Value: Ensures patch rollback capability and audit trail integrity across decades of field operation without wear-out risk. |
Use Scenario: Storing seat position presets, mirror angles, and user preferences in automotive interior control units. IC Role / Device Role / Timing Role: I²C slave device interfaced to 3.3V microcontroller; operates reliably across −40°C to +85°C ambient. Use Value: Enables plug-and-play personalization without requiring reprogramming after battery disconnect or module replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC024HT-I/ST | Requires minimum 2.5V VCC; supports 1 MHz I²C clock; same pinout and memory map | Preferred in 3.3V/5V systems where higher speed or automotive temp range not needed | Select when system VCC ≥ 2.5V and faster write throughput is prioritized over ultra-low-voltage operation |
| AT24C02-SSHM-T | 1.8V–5.5V VCC range; 400 kHz max clock; 1 M cycle endurance; identical 8-pin TSSOP package | Drop-in alternative with same footprint but different manufacturer qualification and test flow | Choose for dual-sourcing flexibility in industrial control designs where Microchip-specific features (e.g., QTP) are not required |
Compared with 24AA024HT-I/ST, the 24LC024HT-I/ST offers higher speed at the cost of reduced low-voltage headroom, while the AT24C02-SSHM-T provides second-source assurance with matching electrical behavior but distinct qualification standards and programming toolchain support.
Availability
24AA024HT-I/ST is available at Aetrix Electronics and suitable for industrial sensor nodes, medical device calibration storage, and smart meter firmware patch tracking requiring stable component supply across extended product lifecycles.
Supply support for 24AA024HT-I/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 components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 24AA024H family was designed specifically for low-power, low-voltage embedded systems requiring reliable nonvolatile storage with hardware-level data protection and I²C bus noise immunity.
FAQ
What is the minimum VCC voltage required for reliable operation of the 24AA024HT-I/ST?
The 24AA024HT-I/ST operates reliably down to 1.7V VCC across its full industrial temperature range (−40°C to +85°C). Below 1.8V, maximum I²C clock frequency is limited to 100 kHz; above 1.8V, it supports up to 400 kHz. Internal voltage detection disables write operations below 1.5V to prevent data corruption, ensuring safe power-down behavior in the 24AA024HT-I/ST.
How does hardware write protection work on the 24AA024HT-I/ST?
Hardware write protection on the 24AA024HT-I/ST is controlled exclusively by the WP pin: when tied to VCC, addresses 80h–FFh (upper 128 bytes) are locked against all write and erase commands; when tied to VSS, full array access is enabled. This protection is active independently of I²C commands and cannot be overridden in software, making the 24AA024HT-I/ST suitable for storing immutable identifiers or calibration data.
Can multiple 24AA024HT-I/ST devices share the same I²C bus?
Yes - up to eight 24AA024HT-I/ST devices can operate on a single I²C bus using unique slave addresses generated by combinations of A0, A1, and A2 pins. Each device responds only to its assigned 7-bit address (1010xxx), enabling scalable memory expansion to 16 Kbits without additional address decoding logic in the 24AA024HT-I/ST system architecture.
What is the maximum write cycle time for the 24AA024HT-I/ST?
The 24AA024HT-I/ST has a maximum write cycle time of 5 ms for both byte and page writes, regardless of VCC or temperature. During this period, the device does not acknowledge I²C commands (ACK polling is required to detect completion), and SDA remains high. This fixed timing simplifies host firmware design and ensures predictable latency in the 24AA024HT-I/ST's nonvolatile write sequence.
Is the 24AA024HT-I/ST compatible with standard I²C protocol implementations?
Yes - the 24AA024HT-I/ST fully complies with the NXP I²C-bus specification for standard-mode (100 kHz) and fast-mode (400 kHz) operation. It supports Start/Stop conditions, 7-bit addressing, ACK/NACK handshaking, and all three read modes (current address, random, sequential). No special controller extensions are needed to interface with the 24AA024HT-I/ST in existing I²C ecosystems.
24AA024HT-I/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:
- 2Kbit
- Memory Organization:
- 256 x 8
- 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-TSSOP
24AA024HT-I/ST FAQ
1.How can I place an order for 24AA024HT-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA024HT-I/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 24AA024HT-I/ST reliable?
The price and inventory of 24AA024HT-I/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24AA024HT-I/ST is usually 5 days.
3.What payment methods are accepted for 24AA024HT-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA024HT-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA024HT-I/ST?
24AA024HT-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA024HT-I/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 24AA024HT-I/ST?
For technical support, including 24AA024HT-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA024HT-I/ST requirements.
6.How does Aetrix verify that 24AA024HT-I/ST is sourced from the original manufacturer or authorized distributors?
All 24AA024HT-I/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 24AA024HT-I/ST meets industry standards.
7.What is the process for return or replacement of 24AA024HT-I/ST?
All 24AA024HT-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24AA024HT-I/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 24AA024HT-I/ST part is unused and in its original packaging.
Return procedure for 24AA024HT-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24AA024HT-I/ST Tags
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