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Microchip Technology 24LCS52T-I/MC
- Part No.:
- 24LCS52T-I/MC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
24LCS52T-I/MC.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,402
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Product details
Overview
24LCS52T-I/MC 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 400 kHz clock frequency (down to 100 kHz below 2.2V), and rated for industrial temperature range (−40°C to +85°C). It is used in embedded systems for storing calibration data, configuration parameters, or firmware patches where robust nonvolatile storage with dual-layer write security is required.
For engineers reviewing the 24LCS52T-I/MC datasheet, 24LCS52T-I/MC pinout, 24LCS52T-I/MC application, or 24LCS52T-I/MC equivalent, key selection considerations include its 2.2–5.5 V supply range, 400 kHz I²C interface speed at nominal VCC, WP pin-based full-array hardware lock, software-locked lower 128 bytes, and 1 μA standby current enabling low-power battery-backed operation.
Technical Context
The 24LCS52T-I/MC implements a standard two-wire I²C slave interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal architecture includes an address pointer, page write buffer (16-byte capacity), and dual write-protection logic - one via external WP pin (entire array), another via software fuse (lower 128 bytes only).
It supports byte and page write operations with self-timed erase/write cycles (max 5 ms), acknowledge polling for bus efficiency, and automatic address increment during sequential reads. The device uses on-chip high-voltage generation for EEPROM programming and includes VCC threshold detection to inhibit writes below 1.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit block), sufficient for small configuration tables or sensor calibration sets |
| Supply voltage | 2.2 V to 5.5 V - compatible with 3.3 V and 5 V logic domains without level shifting |
| I²C clock frequency | Up to 400 kHz at VCC ≥ 2.2 V; drops to 100 kHz below 2.2 V - ensures timing compliance across voltage range |
| Write endurance | 1,000,000 erase/write cycles - supports frequent field updates in telemetry or logging applications |
| Data retention | Greater than 200 years at 85°C - guarantees long-term integrity of stored calibration or security keys |
| Standby current | Typical 1 μA at −40°C to +85°C - enables multi-year battery life in energy-harvesting or coin-cell-powered devices |
| Write protection | Hardware (WP pin) locks entire array; software fuse permanently locks lower 128 bytes - provides layered security against accidental or malicious overwrites |
Pinout & Package
24LCS52T-I/MC is supplied in an 8-lead TDFN (2 mm × 3 mm) package with exposed pad, RoHS-compliant matte tin finish, and industrial-grade thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Chip address input | LSB of 3-bit hardware address; enables up to eight devices on same I²C bus |
| A1 | Chip address input | Mid-bit of 3-bit hardware address; must be tied to VSS or VCC for stable addressing |
| A2 | Chip address input | MSB of 3-bit hardware address; determines unique slave address (1010 A2 A1 A0 R/W) |
| VSS | Ground reference | Return path for all internal circuitry; exposed pad may be connected to VSS for thermal/EMI improvement |
| SDA | Serial data I/O | Open-drain bidirectional line requiring external pull-up; carries address, command, and data |
| SCL | Serial clock input | Master-generated clock synchronizing all I²C transfers; Schmitt-triggered for noise immunity |
| WP | Hardware write-protect input | Active-high lock: tied to VCC disables all writes to entire memory array regardless of software state |
| VCC | Power supply | 2.2–5.5 V input; internal regulation and VCC monitor prevent writes during brown-out conditions |
Key Features
| Feature | Design Value |
|---|---|
| Page write buffer | 16-byte buffer enables burst writes without repeated start/stop overhead, improving I²C throughput by ~7× vs. byte writes |
| Schmitt-trigger inputs | 0.05 VCC hysteresis on SDA/SCL eliminates false triggering from EMI or slow-rising signals in noisy industrial environments |
| Output slope control | Controlled SDA edge rates suppress ground bounce and reduce radiated emissions in dense PCB layouts |
| ESD protection | Exceeds 4,000 V HBM - protects against handling damage and system-level ESD events without external clamps |
| Software write-protect fuse | One-time programmable lock for addresses 00h–7Fh; prevents firmware corruption while allowing upper half updates |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog front-end sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed during power-up initialization via I²C; no real-time timing constraints. Use Value: Dual write protection prevents field recalibration errors or firmware update corruption - critical for ISO 13849 functional safety compliance. | Use Scenario: Holding user-selectable therapy parameters and device identity in portable infusion pumps. IC Role / Device Role / Timing Role: Secure configuration vault; accessed infrequently but requires guaranteed data integrity over 10+ year product lifetime. Use Value: 200-year data retention and 1M write cycles support regulatory traceability requirements and field-service reconfiguration. |
| Automotive Body Control Module | Smart Energy Metering |
Use Scenario: Saving seat/mirror position presets and lighting profiles in automotive BCMs across ignition cycles. IC Role / Device Role / Timing Role: Low-power persistent memory; read at startup, written only on user action; operates across extended temperature range. Use Value: 1 μA standby current extends battery drain time during vehicle sleep mode; −40°C to +85°C rating ensures reliability under hood conditions. | Use Scenario: Storing tariff schedules, metering logs, and cryptographic keys in ANSI C12.22-compliant smart meters. IC Role / Device Role / Timing Role: Tamper-resistant storage for security-critical data; WP pin hard-locked during manufacturing to prevent runtime modification. Use Value: Hardware write protection (WP = VCC) blocks unauthorized key erasure or schedule tampering - satisfies NIST SP 800-57 key management requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA52T-I/MC | Wider 1.8–5.5 V supply range; supports 100 kHz down to 1.8 V; identical pinout and memory map | Better suited for 1.8 V microcontroller interfaces; lacks 2.2 V minimum constraint of 24LCS52T-I/MC | Select 24AA52T-I/MC when interfacing with sub-2.2 V logic or requiring guaranteed 100 kHz operation below 2.2 V |
| AT24C02D-SSHM-T | Same 2 Kbit size and I²C interface; 1.7–5.5 V operation; 1 MHz max clock; no software write-protect feature | Higher speed and broader voltage range, but only hardware (WP) protection - no lower-half software lock | Choose AT24C02D-SSHM-T when maximum I²C bandwidth is prioritized and dual-layer write protection is unnecessary |
Compared with 24LCS52T-I/MC, 24AA52T-I/MC offers greater voltage flexibility at the cost of slightly higher active current, while AT24C02D-SSHM-T trades software write protection for faster clock support and wider VCC range - both require validation of WP pin usage and page write behavior in existing firmware.
Availability
24LCS52T-I/MC is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, and smart energy metering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 24LCS52T-I/MC 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, serving industrial, automotive, and consumer markets with high-reliability silicon and development tools.
The 24LCS52T-I/MC belongs to Microchip's legacy 24XXX serial EEPROM product line, designed specifically for cost-sensitive, low-power embedded systems needing secure, long-life nonvolatile storage with flexible write protection.
FAQ
What is the minimum operating voltage for the 24LCS52T-I/MC?
The 24LCS52T-I/MC has a specified minimum supply voltage of 2.2 V. Below this threshold, the device limits I²C clock frequency to 100 kHz and may not guarantee full functionality; operation below 1.5 V is disabled by internal brown-out detection to prevent corrupted writes. This differs from the 24AA52T-I/MC, which supports down to 1.8 V.
Does the 24LCS52T-I/MC support page write operations, and what is the buffer size?
Yes, the 24LCS52T-I/MC supports page write operations with a 16-byte internal buffer. Writes must remain within a single 16-byte physical page boundary (addresses 00h–0Fh, 10h–1Fh, etc.); crossing boundaries causes wraparound. Each page write completes in ≤5 ms, and the device does not acknowledge during the internal write cycle.
How does hardware and software write protection work together on the 24LCS52T-I/MC?
Hardware write protection (via WP pin tied to VCC) locks the entire 256-byte array unconditionally. Software write protection, once enabled, permanently locks addresses 00h–7Fh (lower 128 bytes). If WP = VCC, software protection cannot be set or reset. Both mechanisms coexist: WP = VSS allows software lock activation, but WP = VCC overrides it entirely.
What package type is used for the 24LCS52T-I/MC, and is the exposed pad electrically connected?
The 24LCS52T-I/MC uses an 8-lead TDFN (2 mm × 3 mm) package with exposed pad. Per Microchip DS21166K-page 5, the exposed pad may be connected to VSS for improved thermal dissipation and EMI performance, or left floating - no internal connection is required for basic operation.
Can the 24LCS52T-I/MC be used in systems with 1.8 V I²C buses?
No - the 24LCS52T-I/MC requires a minimum VCC of 2.2 V and is not specified for reliable operation at 1.8 V. For 1.8 V systems, the functionally similar 24AA52T-I/MC (1.8–5.5 V) is recommended. Attempting to operate the 24LCS52T-I/MC below 2.2 V risks communication failure, incomplete writes, or undefined behavior per electrical specifications.
24LCS52T-I/MC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad
- 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:
- 2.2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x3)
24LCS52T-I/MC FAQ
1.How can I place an order for 24LCS52T-I/MC through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LCS52T-I/MC 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 24LCS52T-I/MC reliable?
The price and inventory of 24LCS52T-I/MC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LCS52T-I/MC is usually 5 days.
3.What payment methods are accepted for 24LCS52T-I/MC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LCS52T-I/MC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LCS52T-I/MC?
24LCS52T-I/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LCS52T-I/MC 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 24LCS52T-I/MC?
For technical support, including 24LCS52T-I/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LCS52T-I/MC requirements.
6.How does Aetrix verify that 24LCS52T-I/MC is sourced from the original manufacturer or authorized distributors?
All 24LCS52T-I/MC 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 24LCS52T-I/MC meets industry standards.
7.What is the process for return or replacement of 24LCS52T-I/MC?
All 24LCS52T-I/MC units undergo pre-shipment inspection (PSI). If there is an issue with 24LCS52T-I/MC, 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 24LCS52T-I/MC part is unused and in its original packaging.
Return procedure for 24LCS52T-I/MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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