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Microchip Technology 24LC024HT-E/ST
- Part No.:
- 24LC024HT-E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC024HT-E/ST.pdf
- Description:
- IC EEPROM 2KBIT I2C 1MHZ 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,097
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Product details
Overview
24LC024HT-E/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 serves as nonvolatile configuration storage in embedded controllers, sensor nodes, and power management ICs requiring robust data retention over 200 years.
For engineers reviewing the 24LC024HT-E/ST datasheet, 24LC024HT-E/ST pinout, 24LC024HT-E/ST application, or 24LC024HT-E/ST equivalent, this page delivers verified electrical specs, validated I²C timing at 1 MHz, confirmed TSSOP-8 package mapping, and real-world use cases in industrial control and automotive subsystems - all grounded in Microchip DS22102A.
Technical Context
The 24LC024HT-E/ST implements a true 2-wire I²C slave interface with Schmitt-triggered SDA/SCL inputs, internal address pointer auto-increment, and page-write buffering for up to 16 bytes per cycle. Its write-protection logic responds solely to the WP pin state (VCC = protected, VSS = enabled), independent of software control.
It supports standard-mode (100 kHz), fast-mode (400 kHz), and fast-mode plus (1 MHz) I²C operation under VCC ≥ 2.5V, with guaranteed AC timing including THD:STA ≥ 250 ns and TAA ≤ 400 ns. The device uses on-chip HV generation for EEPROM programming and includes VCC threshold detection disabling writes below 1.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit single block), enabling compact firmware parameter storage without external addressing logic |
| VCC Range | 2.5V to 5.5V - compatible with 3.3V and 5V systems; excludes 1.7V–2.49V operation supported by AA variant |
| Max Clock Frequency | 1 MHz - enables faster configuration loading vs. legacy 400 kHz EEPROMs, reducing boot-time latency |
| Write Endurance | 1 million erase/write cycles - sufficient for daily calibration updates over 27+ years of field operation |
| Data Retention | 200 years at +25°C - ensures long-term reliability in unattended infrastructure monitoring devices |
| Standby Current | 1 μA max - critical for battery-backed real-time clocks and energy-harvesting sensor nodes |
| Page Write Buffer | 16-byte buffer - reduces I²C transaction count by 87.5% vs. byte-write for full-page updates |
Pinout & Package
24LC024HT-E/ST is supplied in an 8-pin TSSOP package (3.0 mm × 4.4 mm, 0.65 mm pitch), RoHS-compliant and rated for -40°C to +125°C (Automotive E-temp grade).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Chip Select Input | LSB of 3-bit hardware address; sets device ID on shared I²C bus (0–7 possible) |
| A1 | Chip Select Input | Middle bit of hardware address; enables up to eight devices on one bus without software arbitration |
| A2 | Chip Select Input | MSB of hardware address; determines slave address prefix '1010' + A2A1A0 |
| VSS | Ground Reference | Return path for all internal logic and I/O; must be low-impedance to avoid SCL/SDA noise coupling |
| SDA | Bidirectional Data Line | Open-drain I²C data terminal requiring external pull-up; handles address, command, and data transfer |
| SCL | Clock Input | Master-generated synchronous clock; Schmitt trigger input suppresses >50 ns noise spikes |
| WP | Hardware Write-Protect | Active-high enable: ties VCC to lock addresses 0x80–0xFF; no software override possible |
| VCC | Power Supply | 2.5V–5.5V supply; powers EEPROM array, control logic, and HV generator for write cycles |
Key Features
| Feature | Design Value |
|---|---|
| 1 MHz I²C Compatibility | Enables 2.5× faster writes than 400 kHz EEPROMs, cutting configuration time in automotive ECUs |
| Half-Array Hardware Write Protection | Physically blocks writes to upper 128 bytes (0x80–0xFF) when WP = VCC - immune to firmware bugs or malware |
| Schmitt Trigger + Input Filtering | Rejects noise transients <50 ns and provides ≥0.05×VCC hysteresis on SDA/SCL - eliminates bus lockups in noisy motor-control environments |
| Auto-Increment Address Pointer | Supports seamless sequential reads across full 256-byte space with single START, no manual address updates required |
| End-of-Write Acknowledge Polling | Allows master to detect completion via repeated START + control byte - avoids fixed 5 ms delays and maximizes bus utilization |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Storing calibrated sensor offsets and channel-specific gain coefficients that persist across power cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration register providing factory-trimmed parameters to ADCs and DACs during power-up initialization. Use Value: Eliminates need for external trim pots or host MCU re-calibration; 200-year data retention ensures lifetime accuracy without field recalibration. |
Use Scenario: Saving user preferences (seat position, mirror angle, climate settings) and fault logs in door modules and lighting controllers. IC Role / Device Role / Timing Role: Dedicated EEPROM slave on vehicle's body domain I²C bus, accessed only during ignition-on or sleep-wake transitions. Use Value: WP pin tied to ignition rail ensures settings remain intact during jump-starts or battery disconnects; 125°C rating guarantees operation near fuse boxes. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Recording dose history, alarm events, and calibration timestamps for regulatory audit trails. IC Role / Device Role / Timing Role: Tamper-resistant data logger storing time-stamped therapy records with write-protection on critical safety thresholds. Use Value: Half-array WP locks safety-critical limits (e.g., max flow rate) while allowing dynamic logging in unprotected lower block - meets IEC 62304 traceability requirements. |
Use Scenario: Holding tariff tables, metering constants, and firmware update signatures in utility-grade electricity meters. IC Role / Device Role / Timing Role: Secure configuration store interfaced to metrology SoC via isolated I²C; operates continuously at 85°C ambient. Use Value: 1 μA standby current extends backup battery life beyond 10 years; 1 million endurance supports daily firmware patching over 27+ years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA024HT-I/ST | Wider VCC range (1.7V–5.5V); max clock 400 kHz; rated for -40°C to +85°C only | Suitable for battery-powered IoT sensors down to 1.8V, but not automotive under-hood locations | Select if system operates below 2.5V or requires industrial (not automotive) temp grade |
| AT24C02C-SSHM-T | Same 2 Kbit size, 1 MHz I²C, and TSSOP-8 package; 1.7V–5.5V VCC; no hardware WP pin | Lacks half-array write protection - requires software-based locking or external logic for secure config storage | Choose when cost sensitivity outweighs need for hardware-enforced write security |
Compared with 24LC024HT-E/ST, the 24AA024HT-I/ST trades automotive temperature compliance and 1 MHz speed for ultra-low-voltage operation, while the AT24C02C-SSHM-T sacrifices hardware write protection to reduce BOM count in consumer-grade designs.
Availability
24LC024HT-E/ST is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and medical infusion pumps requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 24LC024HT-E/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 delivers automotive-qualified serial EEPROMs optimized for reliable, low-power nonvolatile storage in harsh environments - targeting infotainment, ADAS, and powertrain subsystems where data integrity is mission-critical.
FAQ
What is the maximum I²C clock frequency supported by the 24LC024HT-E/ST?
The 24LC024HT-E/ST supports up to 1 MHz I²C clock frequency when VCC is between 2.5V and 5.5V. This is explicitly specified in Table 1-2 of DS22102A for the 24LC024H variant. Operation above 400 kHz is not permitted for the 24AA024H version, confirming the 1 MHz capability is unique to the LC series, including the 24LC024HT-E/ST.
Does the 24LC024HT-E/ST include hardware write protection, and how is it configured?
Yes, the 24LC024HT-E/ST features hardware write protection for the upper half of its memory array (addresses 0x80–0xFF). This is controlled exclusively by the WP pin: tying WP to VCC activates protection, while connecting WP to VSS disables it. No software command can override this setting - it is a physical enable signal routed directly to the write logic, as confirmed in Section 2.4 and Figure 6-2 of DS22102A.
What package type and temperature grade does the 24LC024HT-E/ST carry?
The 24LC024HT-E/ST uses an 8-pin TSSOP package (3.0 mm × 4.4 mm body, 0.65 mm lead pitch) and is qualified for the Automotive temperature range of -40°C to +125°C. The "E" suffix in the part number denotes the automotive grade, and the "T" indicates TSSOP packaging - both verified in the Device Selection Table and Package Marking Information sections of DS22102A.
How many devices can share the same I²C bus with the 24LC024HT-E/ST?
Up to eight 24LC024HT-E/ST devices can operate on a single I²C bus using hardware address lines A0, A1, and A2. These three pins form a 3-bit chip select code (000 to 111), generating unique 7-bit slave addresses in the format 1010xxx, as defined in Section 5.0 and Figure 5-1 of DS22102A. Each device must have a distinct A0–A2 combination to avoid address collisions.
What is the write endurance and data retention specification for the 24LC024HT-E/ST?
The 24LC024HT-E/ST guarantees 1 million erase/write cycles and 200 years of data retention at +25°C, as stated in the Features list and Table 1-2 Note 4 of DS22102A. These values are characterized - not tested per unit - but ensured through Microchip's Total Endurance™ model and accelerated life testing, making them valid engineering design targets for long-lifecycle applications.
24LC024HT-E/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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24LC024HT-E/ST FAQ
1.How can I place an order for 24LC024HT-E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC024HT-E/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-E/ST reliable?
The price and inventory of 24LC024HT-E/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-E/ST is usually 5 days.
3.What payment methods are accepted for 24LC024HT-E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC024HT-E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC024HT-E/ST?
24LC024HT-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC024HT-E/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-E/ST?
For technical support, including 24LC024HT-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC024HT-E/ST requirements.
6.How does Aetrix verify that 24LC024HT-E/ST is sourced from the original manufacturer or authorized distributors?
All 24LC024HT-E/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-E/ST meets industry standards.
7.What is the process for return or replacement of 24LC024HT-E/ST?
All 24LC024HT-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC024HT-E/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-E/ST part is unused and in its original packaging.
Return procedure for 24LC024HT-E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC024HT-E/ST Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
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