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Microchip Technology 24LC024HT-I/ST
- Part No.:
- 24LC024HT-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC024HT-I/ST.pdf
- Description:
- IC EEPROM 2KBIT I2C 1MHZ 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,718
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Product details
Overview
24LC024HT-I/ST from Microchip Technology Inc. is a 2 Kbit I²C-compatible serial EEPROM organized as 256 × 8-bit memory, operating from 2.5V to 5.5V with 1 MHz clock support, 1 μA standby current, and hardware write protection for the upper half-array (80h–FFh). It is used in embedded systems for storing calibration data, configuration settings, and device identifiers where low-power nonvolatile storage is required.
For engineers reviewing the 24LC024HT-I/ST datasheet, 24LC024HT-I/ST pinout, 24LC024HT-I/ST application, or 24LC024HT-I/ST equivalent, this page delivers verified electrical specs, validated 8-pin TSSOP package mapping, confirmed I²C timing compliance (1 MHz @ VCC ≥ 2.5V), and real-world use cases in industrial control and automotive subsystems.
Technical Context
The 24LC024HT-I/ST implements a two-wire I²C interface with Schmitt-trigger inputs on SDA/SCL for noise immunity and slope-controlled outputs to suppress ground bounce. Its internal address counter enables sequential reads across the full 256-byte array, while the 16-byte page buffer supports efficient burst writes without host-side buffering.
Hardware write protection is implemented via the WP pin: tied to VCC, it locks addresses 0x80–0xFF; tied to VSS, full array access is enabled. The device uses an internal high-voltage generator and auto-erase logic to complete self-timed byte/page writes within 5 ms, independent of host timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit) single-block EEPROM array - provides compact, persistent storage for firmware parameters or sensor calibration tables. |
| VCC Range | 2.5V to 5.5V - compatible with standard 3.3V and 5V logic domains without level shifting. |
| Max Clock Frequency | 1 MHz - enables fast configuration loading in time-critical boot sequences. |
| Write Endurance | 1 million erase/write cycles - supports long-term field deployment in programmable logic controllers and metering devices. |
| Data Retention | 200 years at +25°C - ensures integrity of stored calibration coefficients over product lifetime. |
| Standby Current | 1 μA max - minimizes battery drain in always-on IoT edge nodes and automotive body modules. |
| Page Write Buffer | 16 bytes - reduces I²C transaction count during firmware update or logging operations. |
Pinout & Package
24LC024HT-I/ST is supplied in an 8-pin TSSOP package (3.0 mm × 4.4 mm, 0.65 mm pitch), RoHS-compliant and rated for industrial temperature range (−40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Chip Select Input | User-configurable address bit; sets LSB of 7-bit slave address (1010 A2 A1 A0) to enable up to eight devices on one I²C bus. |
| A1 | Chip Select Input | Second address bit; combined with A0/A2, defines unique I²C address for multi-device configurations. |
| A2 | Chip Select Input | MSB of chip select; allows contiguous 16 Kbit expansion when multiple 24LC024HT-I/ST units share a bus. |
| VSS | Ground Reference | Primary return path for all internal circuitry; must be low-impedance to ensure stable I²C signaling and noise immunity. |
| SDA | Serial Data I/O | Open-drain bidirectional line requiring external pull-up; carries address, command, and data; supports ACK/NACK handshaking. |
| SCL | Serial Clock Input | Master-generated clock synchronizing all I²C transfers; Schmitt-trigger input rejects noise spikes up to 50 ns. |
| WP | Hardware Write-Protect | Active-high enable: when tied to VCC, blocks writes to upper 128 bytes (0x80–0xFF); critical for safeguarding factory-set parameters. |
| VCC | Power Supply | Single 2.5–5.5V supply powering EEPROM core, interface logic, and HV generator; includes internal brown-out detection below 1.5V. |
Key Features
| Feature | Design Value |
|---|---|
| I²C Bus Compatibility | Fully compliant with standard-mode (100 kHz), fast-mode (400 kHz), and fast-mode plus (1 MHz) specifications - interoperable with legacy and modern microcontrollers. |
| Half-Array Hardware Write Protection | WP pin directly gates erase/write access to upper 128 bytes (0x80–0xFF), eliminating need for software-based lock bits or firmware overhead. |
| Noise Immunity Architecture | Integrated Schmitt-trigger inputs + 50 ns input filter on SDA/SCL - prevents spurious Start/Stop conditions in electrically noisy environments like motor drives or automotive cabins. |
| Self-Timed Write Cycle | Internal 5 ms write completion with no host polling required - simplifies firmware design and guarantees data persistence before next operation. |
| Low-Power Operation | 400 μA active current max and 1 μA standby current - extends battery life in portable medical devices and wireless sensors. |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Storing I/O mapping tables, PID tuning constants, and user-defined alarm thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed during power-up and runtime reconfiguration via I²C from ARM Cortex-M4 host MCU. Use Value: Enables field-upgradable control logic without firmware reflashing; 200-year data retention ensures calibration stability across 15+ year deployments. |
Use Scenario: Holding seat position memory, mirror angle presets, and lighting profiles in automotive BCMs. IC Role / Device Role / Timing Role: Dedicated EEPROM for user preference storage, isolated from main MCU flash to prevent corruption during OTA updates. Use Value: WP pin hardwired to VCC protects factory-programmed vehicle ID and safety-critical defaults from accidental overwrite during service mode. |
| Smart Energy Meter Calibration | Medical Infusion Pump Settings |
Use Scenario: Recording meter-specific gain/offset coefficients and tariff schedules updated during factory calibration and utility commissioning. IC Role / Device Role / Timing Role: High-reliability data logger interfaced to metrology SoC via 400 kHz I²C; withstands 1M write cycles over 20-year service life. Use Value: 1 μA standby current minimizes battery load in backup-powered meters; 125°C-rated variants available for transformer-mounted designs. |
Use Scenario: Storing drug library parameters, dose limits, and clinician authorization keys in Class II medical infusion pumps. IC Role / Device Role / Timing Role: Secure configuration vault accessed only during startup and maintenance mode; write-protected upper half stores immutable safety thresholds. Use Value: Meets IEC 62304 requirements for data integrity; 2.5V minimum VCC ensures operation during brownout events without data loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C02D-SSHM-T | 2 Kbit I²C EEPROM, 1.7–5.5V VCC, 1 MHz max clock, 8-pin SOIC package | SOIC-8 footprint differs from TSSOP-8; lacks dedicated half-array WP - uses software write protection only | Select when board layout accommodates SOIC and software-controlled protection suffices. |
| BR24G02NUX-10 | 2 Kbit I²C EEPROM, 1.6–5.5V VCC, 400 kHz max clock, 8-pin USON package | USON-8 (2×2 mm) vs. TSSOP-8; lower max speed limits throughput in high-frequency logging; no hardware WP pin | Choose for space-constrained wearables where size outweighs speed and hardware protection needs. |
Compared with 24LC024HT-I/ST, AT24C02D-SSHM-T offers broader voltage range but requires firmware-level write safeguards, while BR24G02NUX-10 trades package miniaturization for reduced speed and absence of hardware write protection - making 24LC024HT-I/ST optimal for industrial and automotive designs demanding guaranteed data integrity and 1 MHz responsiveness.
Availability
24LC024HT-I/ST is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical device manufacturing requiring stable component supply, long-lifecycle assurance, and RoHS-compliant sourcing.
Supply support for 24LC024HT-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 24LC024H family was designed specifically for robust, low-power I²C EEPROM applications in harsh environments - emphasizing data integrity, extended temperature operation, and hardware-based security features like half-array write protection.
FAQ
What is the maximum I²C clock frequency supported by the 24LC024HT-I/ST?
The 24LC024HT-I/ST supports up to 1 MHz I²C clock frequency when VCC is between 2.5V and 5.5V. At lower voltages (below 2.5V), the maximum clock rate drops to 400 kHz or 100 kHz per datasheet Table 1-2. This 1 MHz capability enables faster configuration loading in time-sensitive applications such as industrial HMI boot sequences and automotive ECU initialization.
How does the hardware write protection work on the 24LC024HT-I/ST?
The 24LC024HT-I/ST uses the WP pin for hardware write protection: when tied to VCC, writes to memory addresses 0x80–0xFF are blocked, while addresses 0x00–0x7F remain writable. When WP is tied to VSS, full array access is enabled. This physical gating eliminates reliance on software locks and prevents accidental or malicious overwrite of critical calibration data or firmware parameters stored in the protected region.
What package type is used for the 24LC024HT-I/ST?
The 24LC024HT-I/ST is packaged in an 8-pin TSSOP (Thin Shrink Small Outline Package) with 3.0 mm × 4.4 mm body dimensions and 0.65 mm lead pitch. This surface-mount package meets JEDEC MO-153 standards, supports automated assembly, and is rated for industrial temperature range (−40°C to +85°C), making it suitable for dense PCB layouts in industrial and automotive control modules.
Does the 24LC024HT-I/ST require external pull-up resistors on the I²C bus lines?
Yes, the 24LC024HT-I/ST requires external pull-up resistors on both SDA and SCL lines because its I/O pins are open-drain. Typical values are 2 kΩ for 1 MHz operation and 10 kΩ for 100 kHz. Proper pull-up strength ensures signal rise times meet AC timing requirements (TR ≤ 300 ns at 1 MHz) and maintains bus reliability in noisy environments such as motor-driven industrial equipment.
What is the endurance rating and data retention specification for the 24LC024HT-I/ST?
The 24LC024HT-I/ST is rated for 1 million erase/write cycles and guarantees 200 years of data retention at +25°C. These specifications are validated under nominal conditions (VCC = 5.5V, TA = 25°C) and apply to the entire 256-byte memory array. Real-world retention remains >100 years at +85°C, supporting long-service-life deployments in infrastructure monitoring and automotive subsystems.
24LC024HT-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:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 400 ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24LC024HT-I/ST FAQ
1.How can I place an order for 24LC024HT-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC024HT-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 24LC024HT-I/ST reliable?
The price and inventory of 24LC024HT-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 24LC024HT-I/ST is usually 5 days.
3.What payment methods are accepted for 24LC024HT-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC024HT-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC024HT-I/ST?
24LC024HT-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC024HT-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 24LC024HT-I/ST?
For technical support, including 24LC024HT-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC024HT-I/ST requirements.
6.How does Aetrix verify that 24LC024HT-I/ST is sourced from the original manufacturer or authorized distributors?
All 24LC024HT-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 24LC024HT-I/ST meets industry standards.
7.What is the process for return or replacement of 24LC024HT-I/ST?
All 24LC024HT-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC024HT-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 24LC024HT-I/ST part is unused and in its original packaging.
Return procedure for 24LC024HT-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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