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Microchip Technology 24LC024T/ST
- Part No.:
- 24LC024T/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC024T/ST.pdf
- Description:
- IC EEPROM 2KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,109
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Product details
Overview
24LC024T/ST from Microchip Technology Inc. is a 2 Kbit I²C-compatible serial EEPROM organized as 256 × 8-bit memory, featuring hardware write-protection (WP pin), 16-byte page write buffer, and operation from 2.5V to 5.5V. It supports 400 kHz clock rate (100 kHz below 2.5V), delivers typical standby current of 1 μA, and is rated for industrial temperature range (–40°C to +85°C). It is used in embedded systems for storing calibration data, configuration settings, and device identifiers.
For engineers reviewing the 24LC024T/ST datasheet, 24LC024T/ST pinout, 24LC024T/ST application, or 24LC024T/ST equivalent, key selection criteria include voltage compatibility (2.5–5.5V), WP-enabled hardware protection, 8-pin SOIC/TSSOP/DFN package options, and guaranteed 1 million erase/write cycles with >200-year data retention.
Technical Context
The 24LC024T/ST implements a standard two-wire I²C interface with open-drain SDA/SCL pins, Schmitt-trigger inputs, and internal slope control to suppress ground bounce. Its address decoding uses three hardware address pins (A0–A2), enabling up to eight devices on one bus.
Write operations are self-timed with maximum 5 ms byte/page cycle time; acknowledge polling is supported to detect completion. The device includes VCC threshold detection that disables writes below ~1.5V and features ESD protection exceeding 4 kV on all pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit), sufficient for firmware flags, MAC addresses, or sensor calibration tables |
| VCC range | 2.5V to 5.5V - compatible with 3.3V and 5V logic domains without level shifting |
| Max clock frequency | 400 kHz (100 kHz when VCC < 2.5V) - enables fast configuration loading in host microcontroller boot sequences |
| Page write buffer | 16 bytes - reduces I²C transaction count for multi-byte updates, improving bus efficiency |
| Endurance | 1 million erase/write cycles - supports frequent logging or parameter tuning in industrial controllers |
| Data retention | >200 years at +85°C - ensures long-term reliability in unattended equipment like smart meters or medical sensors |
| Write-protect | Hardware WP pin - prevents accidental overwrites during power-up/down or firmware glitches |
Pinout & Package
24LC024T/ST is available in Pb-free, RoHS-compliant 8-pin SOIC (3.90 mm), TSSOP, DFN, TDFN, and MSOP packages. The /ST suffix denotes tape-and-reel packaging for automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Address input | LSB of 3-bit hardware slave address; sets device ID on shared I²C bus (0 or 1) |
| A1 | Address input | Middle bit of slave address; enables up to eight unique addresses (0 or 1) |
| A2 | Address input | MSB of slave address; required for multi-device bus topology |
| VSS | Ground reference | Return path for all internal circuitry; must be low-impedance to ensure noise immunity |
| SDA | Serial data I/O | Open-drain bidirectional line; requires external pull-up (2 kΩ for 400 kHz, 10 kΩ for 100 kHz) |
| SCL | Serial clock input | Master-generated clock; synchronizes all read/write transfers and timing-critical ACKs |
| WP | Write-protect control | Active-high hardware lock: tied to VCC to disable all writes, VSS to enable writes |
| VCC | Power supply | 2.5–5.5V operating range; internal voltage detector blocks writes if VCC drops below ~1.5V |
Key Features
| Feature | Design Value |
|---|---|
| Hardware write-protection | Physically prevents unintended writes via dedicated WP pin - critical for factory-programmed security keys or calibration constants |
| Schmitt-trigger inputs | Eliminates false triggering from bus noise by providing hysteresis (≥0.05×VCC) on SDA/SCL - improves robustness in electrically noisy environments |
| Page write capability | Accepts up to 16 bytes per transaction, reducing I²C overhead and host CPU load during bulk configuration updates |
| Low-power design | 1 μA typical standby current enables use in battery-backed systems such as IoT edge nodes or portable diagnostics tools |
| I²C clock compatibility | Supports both 100 kHz (legacy) and 400 kHz (fast-mode) buses - interoperable with wide range of microcontrollers and SoCs |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing temperature compensation coefficients and sensor offset values during factory calibration of pressure transducers. IC Role / Device Role / Timing Role: Non-volatile storage element holding persistent calibration parameters accessed at system power-on. Use Value: Enables field-deployable sensors to retain accuracy across thermal cycles and power interruptions without requiring recalibration. | Use Scenario: Saving user-selected therapy modes, dosage limits, and audit logs in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, low-power configuration memory with hardware write-protection to prevent runtime corruption of safety-critical settings. Use Value: Ensures regulatory compliance (IEC 62304) by guaranteeing integrity of operational parameters even during brown-out conditions. |
| Smart Meter Firmware Flags | Automotive Body Control Module IDs |
Use Scenario: Recording firmware version, meter serial number, and tariff schedule activation status in residential electricity meters. IC Role / Device Role / Timing Role: Tamper-resistant identity and state storage accessible via I²C during boot and firmware update verification. Use Value: Supports remote firmware validation and anti-counterfeiting through immutable device-specific identifiers stored in protected memory. | Use Scenario: Storing vehicle-specific configuration bits (e.g., mirror fold-on-lock, seat position presets) in BCMs across production variants. IC Role / Device Role / Timing Role: Factory-programmable configuration memory mapped to CAN gateway initialization routines. Use Value: Reduces BOM complexity by eliminating variant-specific PCBs - same BCM hardware supports multiple trim levels via EEPROM-configured behavior. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA024T/ST | Wider VCC range (1.7–5.5V); identical pinout, memory map, and timing | Preferred for 1.8V or battery-powered systems where 2.5V minimum is not guaranteed | Select 24AA024T/ST only if operation below 2.5V is required; otherwise 24LC024T/ST offers better noise immunity at 3.3V/5V rails |
| AT24C02D-SSHM-T | Same 2 Kbit capacity, 400 kHz I²C, but no hardware WP pin; different A0–A2 addressing scheme | Lacks hardware write-protection - requires software-based locking or external logic for secure writes | Choose AT24C02D-SSHM-T only when WP functionality is unnecessary and cost minimization is prioritized over write safety |
Compared with 24AA024T/ST and AT24C02D-SSHM-T, the 24LC024T/ST uniquely combines industrial-grade voltage margin (2.5–5.5V), integrated hardware write-protection, and guaranteed 1M-cycle endurance - making it optimal for safety-critical or high-reliability embedded deployments where parameter integrity is non-negotiable.
Availability
24LC024T/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive body control module ID storage requiring stable component supply across extended product lifecycles.
Supply support for 24LC024T/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 manufacturing and support infrastructure.
The 24LC024T/ST belongs to Microchip's 24LCxx family of I²C EEPROMs, designed specifically for reliable, low-power, and pin-efficient non-volatile storage in space-constrained embedded systems.
FAQ
What is the operating voltage range for the 24LC024T/ST?
The 24LC024T/ST operates from 2.5V to 5.5V. Below 2.5V, it is not functional - unlike the 24AA024T/ST, which supports down to 1.7V. This makes the 24LC024T/ST ideal for 3.3V and 5V systems where tighter voltage regulation simplifies power design. Internal VCC monitoring disables writes if supply drops near 1.5V, preventing data corruption.
Does the 24LC024T/ST have hardware write-protection?
Yes, the 24LC024T/ST includes a dedicated WP (Write-Protect) pin. When tied to VCC, it disables all write operations to the entire memory array; when tied to VSS, writes are enabled. This feature is absent in the 24LC025T/ST and 24AA025T/ST variants. The WP pin provides deterministic, hardware-level security against accidental or malicious overwrites.
How many devices can share the same I²C bus with the 24LC024T/ST?
Up to eight 24LC024T/ST devices can be cascaded on a single I²C bus using the A0, A1, and A2 address pins. Each combination of these three pins sets a unique 3-bit chip select code, allowing distinct slave addresses (0x50–0x57). This enables scalable memory expansion - for example, aggregating 16 Kbits across eight devices - without additional address decoding logic.
What is the maximum write cycle time for the 24LC024T/ST?
The 24LC024T/ST has a maximum write cycle time of 5 ms for both byte and page writes. This self-timed internal erase/write cycle eliminates the need for host polling delays in most cases. Acknowledge polling (repeated START + control byte) can be used to detect completion earlier, optimizing I²C bus utilization in time-sensitive applications.
Is the 24LC024T/ST RoHS-compliant and Pb-free?
Yes, the 24LC024T/ST is Pb-free and RoHS-compliant per Microchip's documentation. The "T/ST" suffix indicates tape-and-reel packaging with lead-free finish. All package variants - including SOIC, TSSOP, DFN, TDFN, and MSOP - meet JEDEC J-STD-020 moisture sensitivity level (MSL) requirements and are qualified for reflow soldering per industry standards.
24LC024T/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:
- 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:
- 2.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24LC024T/ST FAQ
1.How can I place an order for 24LC024T/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC024T/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 24LC024T/ST reliable?
The price and inventory of 24LC024T/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC024T/ST is usually 5 days.
3.What payment methods are accepted for 24LC024T/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC024T/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC024T/ST?
24LC024T/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC024T/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 24LC024T/ST?
For technical support, including 24LC024T/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC024T/ST requirements.
6.How does Aetrix verify that 24LC024T/ST is sourced from the original manufacturer or authorized distributors?
All 24LC024T/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 24LC024T/ST meets industry standards.
7.What is the process for return or replacement of 24LC024T/ST?
All 24LC024T/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC024T/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 24LC024T/ST part is unused and in its original packaging.
Return procedure for 24LC024T/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC024T/ST Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
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AT24C02C-SSHM-T
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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