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Microchip Technology 24LCS52/ST
- Part No.:
- 24LCS52/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LCS52/ST.pdf
- Description:
- IC EEPROM 2KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,309
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Product details
Overview
24LCS52/ST from Microchip Technology Inc. is a 2 Kbit I²C-compatible serial EEPROM with hardware and software write protection, organized as 256 × 8-bit memory, operating from 2.2V to 5.5V, supporting up to 400 kHz clock frequency (≥2.2V), and rated for industrial temperature range (–40°C to +85°C). It is used in embedded systems for nonvolatile storage of calibration data, configuration settings, and firmware parameters.
For engineers reviewing the 24LCS52/ST datasheet, 24LCS52/ST pinout, 24LCS52/ST application, or 24LCS52/ST equivalent, this page delivers verified electrical specs, I²C timing constraints, WP pin behavior, endurance (1M cycles), and package-validated pin functions - all confirmed against Microchip DS21166K.
Technical Context
The 24LCS52/ST implements a standard two-wire I²C slave interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and ground bounce. Its internal architecture includes an address pointer, page write buffer (16 bytes), and dual-layer write protection: hardware-level via the WP pin and software-level for lower 128 bytes (00h–7Fh).
It supports byte and page write operations with self-timed erase/write cycles (5 ms max), ACK polling for bus efficiency, and VCC threshold detection that disables writes below 1.5V. The device uses CMOS technology with typical active current of 1.0 mA and standby current of 1.0 µA at industrial temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit block), sufficient for small configuration tables or sensor calibration offsets |
| Supply Voltage Range | 2.2V to 5.5V - excludes sub-2.2V operation unlike 24AA52, enabling robustness in stable 3.3V/5V systems |
| I²C Clock Frequency | Up to 400 kHz (at VCC ≥ 2.2V); no 100 kHz fallback - simplifies timing design for high-speed I²C buses |
| Write Endurance | 1,000,000 erase/write cycles - supports frequent field updates without premature wear-out |
| Data Retention | Greater than 200 years - ensures long-term reliability in unattended or maintenance-free deployments |
| Operating Temperature | –40°C to +85°C (Industrial grade) - validated for automotive body control modules and industrial PLCs |
| ESD Protection | > 4,000 V HBM - provides immunity against handling and board-level electrostatic discharge events |
Pinout & Package
24LCS52/ST is available in Pb-free 8-lead SOIC (300 mil) package, marked "24LCS52I SN 0510 3EC" per DS21166K-page 14. Pin numbering follows standard SOIC convention (pin 1 = A0, pin 8 = VCC).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | Chip Address Inputs | Set 3-bit slave address (up to eight devices on same I²C bus); must be hardwired to VSS or VCC |
| VSS | Ground Reference | Return path for all internal logic and I/O; requires low-impedance connection to system GND plane |
| SDA | Serial Data I/O | Open-drain bidirectional line requiring external pull-up (2 kΩ typical for 400 kHz); changes only during SCL low |
| SCL | Serial Clock Input | Master-generated clock synchronizing all read/write transfers; Schmitt-trigger input rejects noise |
| WP | Hardware Write-Protect | Active-high enable: tied to VCC → full-array protection; tied to VSS → protection controlled by software fuse |
| VCC | Power Supply | 2.2V–5.5V supply; internal VCC detector disables writes if voltage drops below 1.5V |
Key Features
| Feature | Design Value |
|---|---|
| Software Write-Protection | Permanently locks lower 128 bytes (00h–7Fh) via '0110' control code - prevents accidental overwrite of critical calibration data |
| Hardware Write-Protection | WP pin enables full-array lock independent of software state - allows system-level firmware update gating |
| Page Write Buffer | 16-byte buffer enables burst writes within one physical page - reduces I²C transaction overhead by ~85% vs. byte writes |
| Noise Immunity | Schmitt-trigger inputs + 50 ns input filter suppress bus noise - eliminates spurious Start/Stop detection in electrically noisy environments |
| ACK Polling Support | Allows master to detect write completion without fixed delays - maximizes I²C bus utilization in time-critical applications |
Applications
| Smart Sensor Node | Industrial PLC Module |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and real-time health logs in battery-backed wireless nodes. IC Role / Device Role / Timing Role: Nonvolatile configuration store interfaced via I²C; retains data across power cycles and brownouts. Use Value: Enables field recalibration without firmware reflash; 200-year retention ensures data integrity over product lifetime. | Use Scenario: Holding user-defined I/O mapping tables and alarm thresholds in modular automation controllers. IC Role / Device Role / Timing Role: Slave EEPROM on industrial I²C bus; accessed during boot and runtime parameter updates. Use Value: Dual write-protection layers prevent corruption during EMI-heavy switching events or firmware updates. |
| Automotive Body Control Unit | Medical Diagnostic Device |
Use Scenario: Saving seat/mirror position presets and lighting profiles in 12V vehicle subsystems. IC Role / Device Role / Timing Role: Low-voltage EEPROM (2.2V min) tolerant of automotive battery dips; operates across –40°C to +85°C. Use Value: Guaranteed functionality during cold cranking (low VCC) and under-hood thermal stress. | Use Scenario: Storing FDA-mandated calibration audit trails and user preference settings in portable diagnostics gear. IC Role / Device Role / Timing Role: Secure configuration storage with permanent lower-half lock for regulatory compliance data. Use Value: Software write-protect ensures immutable audit records; 1M-cycle endurance supports daily recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA52-I/P | Wider VCC range (1.8–5.5V); supports 100 kHz at VCC < 2.2V; identical pinout and memory map | Better suited for ultra-low-voltage systems (e.g., coin-cell IoT sensors) where 2.2V minimum is limiting | Select 24AA52-I/P only if sub-2.2V operation is required; otherwise 24LCS52/ST offers tighter VCC spec and simplified timing budget |
| AT24C02C-SSHM-T | Same 2 Kbit size, 400 kHz, and SOIC-8 package; but lacks software write-protect register and reset capability | Hardware WP only; no permanent lower-half lock - less suitable for mixed-criticality data partitioning | Choose AT24C02C-SSHM-T when cost sensitivity outweighs need for granular write protection; verify WP-only policy meets safety requirements |
Compared with 24AA52-I/P and AT24C02C-SSHM-T, the 24LCS52/ST uniquely combines guaranteed 400 kHz performance across its full 2.2–5.5V range, dual-mode write protection (hardware + irreversible software fuse), and ACK polling - making it optimal for industrial and automotive designs demanding deterministic timing and data integrity.
Availability
24LCS52/ST is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, medical diagnostics equipment, and smart sensor nodes requiring stable component supply across extended lifecycles.
Supply support for 24LCS52/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 24LCS52/ST belongs to Microchip's legacy 24XXX serial EEPROM family, designed specifically for reliable, low-power, I²C-based nonvolatile storage in space-constrained embedded applications.
FAQ
What is the minimum supply voltage for reliable operation of the 24LCS52/ST?
The 24LCS52/ST requires a minimum VCC of 2.2V for guaranteed operation and full 400 kHz I²C performance. Unlike the 24AA52, it does not support 100 kHz operation below 2.2V. Below 1.5V, internal write logic is disabled by the VCC threshold detector to prevent data corruption.
How does hardware write protection interact with software write protection on the 24LCS52/ST?
When the WP pin is tied to VCC, hardware write protection overrides all software settings and locks the entire 256-byte array - including the software write-protect register itself. When WP is tied to VSS, software write protection applies only to addresses 00h–7Fh, while 80h–FFh remain unprotected unless WP is asserted.
Can the software write-protect fuse on the 24LCS52/ST be reset, and if so, how?
Yes, the software write-protect fuse on the 24LCS52/ST can be reset using the RWPF command ('1001' control code), but only when VCC + 5.5V (VHH) is applied to the WP pin for ≥1 µs before issuing the command. This high-voltage pulse is required to clear the fuse and restore full write access to the lower 128 bytes.
What is the maximum number of bytes that can be written in a single page write operation for the 24LCS52/ST?
The 24LCS52/ST supports a 16-byte page write buffer. A single page write operation can transfer up to 16 bytes, provided all addresses fall within the same physical page boundary (i.e., addresses aligned to 0x00–0x0F, 0x10–0x1F, etc.). Crossing a page boundary causes wraparound, not continuation.
Does the 24LCS52/ST support I²C clock stretching or multi-master arbitration?
No, the 24LCS52/ST does not support clock stretching or multi-master arbitration. It operates strictly as an I²C slave device with fixed timing parameters. The master must fully control SCL and manage bus arbitration; the 24LCS52/ST responds only to valid Start/Stop conditions and acknowledges addressed transactions.
24LCS52/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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:
- 2.2V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24LCS52/ST FAQ
1.How can I place an order for 24LCS52/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LCS52/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 24LCS52/ST reliable?
The price and inventory of 24LCS52/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LCS52/ST is usually 5 days.
3.What payment methods are accepted for 24LCS52/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LCS52/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LCS52/ST?
24LCS52/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LCS52/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 24LCS52/ST?
For technical support, including 24LCS52/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LCS52/ST requirements.
6.How does Aetrix verify that 24LCS52/ST is sourced from the original manufacturer or authorized distributors?
All 24LCS52/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 24LCS52/ST meets industry standards.
7.What is the process for return or replacement of 24LCS52/ST?
All 24LCS52/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LCS52/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 24LCS52/ST part is unused and in its original packaging.
Return procedure for 24LCS52/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LCS52/ST Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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AT24C02C-SSHM-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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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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