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Microchip Technology 24AA024HT-I/SN
- Part No.:
- 24AA024HT-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24AA024HT-I/SN.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,848
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Product details
Overview
24AA024HT-I/SN 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 controllers, sensor nodes, and power management ICs.
For engineers reviewing the 24AA024HT-I/SN datasheet, 24AA024HT-I/SN pinout, 24AA024HT-I/SN application, or 24AA024HT-I/SN equivalent, key selection criteria include low-voltage operation down to 1.7V, half-array hardware write protection via WP pin, 16-byte page write buffer, Schmitt-triggered SDA/SCL inputs for noise immunity, and compatibility with 100 kHz/400 kHz I²C buses.
Technical Context
The 24AA024HT-I/SN implements a two-wire I²C slave interface with fixed 7-bit address prefix '1010' and three user-configurable chip select bits (A0–A2), enabling up to eight devices on one bus. Its internal address pointer supports current-address, random, and sequential read modes, with automatic rollover from FFh to 00h.
Write operations use an on-chip 16-byte page buffer and self-timed erase/write cycle (max 5 ms), while hardware write protection is controlled solely by the WP pin state-tied to VCC to lock addresses 80h–FFh, or VSS to enable full-array writes. Schmitt-trigger inputs and 50 ns input filter spike suppression ensure robust operation on noisy PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit), single-block organization - simplifies address management and eliminates bank switching logic. |
| VCC Range | 1.7V to 5.5V - enables direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level shifters. |
| Max Clock Frequency | 400 kHz at VCC ≥ 1.8V - supports standard-mode I²C timing with 600 ns minimum SCL high time. |
| Write Endurance | 1 million erase/write cycles - ensures long-term reliability in firmware update or calibration data logging applications. |
| Data Retention | 200 years at +25°C - guarantees persistent storage of device-unique identifiers or security keys over product lifetime. |
| Write Protection | Hardware-enabled for upper half (80h–FFh) via WP pin - prevents accidental overwrite of critical configuration or MAC address data. |
| ESD Rating | >4,000 V HBM - provides built-in robustness against handling and system-level ESD events without external protection. |
Pinout & Package
24AA024HT-I/SN uses an 8-pin SOIC (150 mil) package with gull-wing leads, 1.27 mm pitch, and JEDEC MS-012AC compliant outline. Pin 1 is marked with a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Chip Select Input | User-configurable LSB of 3-bit device address; hardwired to VSS or VCC to assign unique I²C slave address (1010xxx0). |
| A1 | Chip Select Input | Middle bit of device address; determines bus position among up to eight parallel 24AA024HT-I/SN devices. |
| A2 | Chip Select Input | MSB of device address; enables contiguous 16 Kbit expansion when multiple units share SDA/SCL lines. |
| VSS | Ground Reference | Return path for all internal circuitry; must be connected directly to system ground plane with low-inductance trace. |
| SDA | Serial Data I/O | Open-drain bidirectional line requiring external pull-up (2 kΩ typical for 400 kHz); carries address, command, and data bytes. |
| SCL | Serial Clock Input | Master-generated clock synchronizing all I²C transfers; Schmitt-trigger input rejects noise below 0.05×VCC hysteresis. |
| WP | Write-Protect Control | Active-high hardware lock: tied to VCC disables writes to 80h–FFh; tied to VSS enables full-memory access. |
| VCC | Power Supply | Single 1.7–5.5V supply powering EEPROM core and interface logic; internal voltage detector disables writes below 1.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | Functional down to 1.7V VCC - supports battery-powered IoT sensors and energy-harvesting systems without voltage boosting. |
| Page Write Buffer | 16-byte buffer reduces I²C transaction count for multi-byte updates - cuts bus occupancy by up to 94% vs. byte-write mode. |
| Noise Immunity | Schmitt-trigger inputs + 50 ns spike filtering on SDA/SCL - eliminates false Start/Stop detection in motor-drive or switching-power environments. |
| Hardware Write Protect | Dedicated WP pin controlling 128-byte protected region - isolates factory-programmed MAC addresses or calibration constants from firmware errors. |
| Extended Temp Range | −40°C to +85°C operation - qualified for industrial control panels, automotive body modules, and outdoor metering equipment. |
Applications
| Industrial Sensor Calibration | Smart Meter Configuration Storage |
|---|---|
Use Scenario: Storing temperature-compensation coefficients and sensor offset values during factory calibration of pressure transducers. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding 256 bytes of trim data, accessed once per power-on reset via I²C. Use Value: Eliminates need for external trimming potentiometers; enables field recalibration without hardware modification. |
Use Scenario: Retaining tariff schedules, billing parameters, and communication settings in electricity/water meters exposed to wide ambient temperatures. IC Role / Device Role / Timing Role: Tamper-resistant parameter store updated infrequently but requiring guaranteed retention over 15+ years. Use Value: 200-year data retention and 1M endurance meet ANSI C12.22 and DLMS/COSEM compliance requirements. |
| Embedded Controller Identity | Power Management Unit Settings |
Use Scenario: Holding unique MAC address, serial number, and manufacturing date in network-connected HVAC controllers. IC Role / Device Role / Timing Role: Factory-programmable identity module mapped to I²C address 0x50, read at boot for network initialization. Use Value: Hardware write protection (WP = VCC) prevents accidental overwrite of IEEE 802.3-compliant MAC block. |
Use Scenario: Saving undervoltage lockout thresholds, soft-start delays, and fault recovery modes in DC-DC controller reference designs. IC Role / Device Role / Timing Role: Configuration scratchpad for PMIC registers, written during system commissioning and read at each power-up. Use Value: 1.7V operation allows direct connection to buck converter output rails, avoiding dedicated LDO for EEPROM supply. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA024T-I/OT | Same 2 Kbit capacity and 1.7–5.5V VCC, but in SOT-23-6 package with only A0 pin (2-device addressing); no A1/A2 pins. | Limited to ≤2 devices per bus; unsuitable for multi-unit configurations requiring A1/A2 address bits. | Select when board space is constrained and single or dual-device topology suffices. |
| AT24C02D-SSHM-T | 2 Kbit I²C EEPROM with 1.7–5.5V operation, but lacks hardware write protect pin; uses software write protection only. | No dedicated WP pin - requires firmware coordination to prevent accidental writes to critical sectors. | Choose when cost sensitivity outweighs need for hardware-level write lock on upper memory block. |
Compared with 24AA024HT-I/SN, the 24AA024T-I/OT sacrifices address flexibility for footprint reduction, while the AT24C02D-SSHM-T trades hardware write protection for broader vendor availability - making 24AA024HT-I/SN optimal where deterministic half-array locking and 8-device bus scalability are required.
Availability
24AA024HT-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter configuration storage, and embedded controller identity management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 24AA024HT-I/SN 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 microcontroller, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 24AA024H family delivers ultra-low-power, I²C-compatible EEPROMs optimized for space-constrained, battery-operated, and industrial-grade embedded systems requiring guaranteed data integrity and long-term retention.
FAQ
What is the maximum I²C clock frequency supported by the 24AA024HT-I/SN?
The 24AA024HT-I/SN supports up to 400 kHz I²C clock frequency when VCC is 1.8V or higher. At VCC < 1.8V, maximum clock rate drops to 100 kHz to maintain timing margins. This dual-speed capability ensures interoperability with both legacy 100 kHz controllers and modern high-speed I²C masters while maintaining signal integrity.
How does the hardware write protection work on the 24AA024HT-I/SN?
The 24AA024HT-I/SN uses the WP pin to enable hardware write protection for memory addresses 80h–FFh (128 bytes). When WP is tied to VCC, writes to this upper half are blocked; writes to 00h–7Fh remain permitted. When WP is tied to VSS, full-array writes are allowed. This pin-level control operates independently of software commands and cannot be overridden.
Can multiple 24AA024HT-I/SN devices share the same I²C bus?
Yes, up to eight 24AA024HT-I/SN devices can operate on a single I²C bus using the A0, A1, and A2 pins to configure unique 3-bit chip select codes. Each device responds only to its assigned 7-bit slave address (1010xxx0), enabling scalable memory expansion to 16 Kbits without additional address decoding logic.
What is the page write buffer size of the 24AA024HT-I/SN?
The 24AA024HT-I/SN features a 16-byte page write buffer, allowing up to 16 consecutive bytes to be loaded into the buffer before initiating a self-timed write cycle. This reduces I²C transaction overhead significantly compared to byte-write mode and improves efficiency when updating configuration blocks or calibration tables.
Does the 24AA024HT-I/SN require external pull-up resistors on SDA and SCL lines?
Yes, the 24AA024HT-I/SN requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. Typical values are 2 kΩ for 400 kHz operation and 10 kΩ for 100 kHz, connected to the same VCC rail used by the device. Incorrect pull-up values may cause timing violations or bus contention.
24AA024HT-I/SN 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:
- 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-SOIC
24AA024HT-I/SN FAQ
1.How can I place an order for 24AA024HT-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA024HT-I/SN 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/SN reliable?
The price and inventory of 24AA024HT-I/SN 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/SN is usually 5 days.
3.What payment methods are accepted for 24AA024HT-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA024HT-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA024HT-I/SN?
24AA024HT-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA024HT-I/SN 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/SN?
For technical support, including 24AA024HT-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA024HT-I/SN requirements.
6.How does Aetrix verify that 24AA024HT-I/SN is sourced from the original manufacturer or authorized distributors?
All 24AA024HT-I/SN 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/SN meets industry standards.
7.What is the process for return or replacement of 24AA024HT-I/SN?
All 24AA024HT-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24AA024HT-I/SN, 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/SN part is unused and in its original packaging.
Return procedure for 24AA024HT-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24AA024HT-I/SN Tags
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