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Microchip Technology 11LC020-E/MS
- Part No.:
- 11LC020-E/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
11LC020-E/MS.pdf
- Description:
- IC EEPROM 2KBIT SGL WIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,042
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Product details
Overview
11LC020-E/MS from Microchip Technology Inc. is a 2 Kbit (256 × 8) serial EEPROM with UNI/O® single-I/O bus interface, designed for space-constrained embedded systems requiring nonvolatile memory with ultra-low power consumption and automotive-grade reliability. It operates from 2.5V to 5.5V, supports 100 kbps bit rate, features 16-byte page write buffer, and delivers 1 µA max standby current at -40°C to +125°C.
For engineers reviewing the 11LC020-E/MS datasheet, 11LC020-E/MS pinout, 11LC020-E/MS application, or 11LC020-E/MS equivalent, this device is selected for automotive body control modules, industrial sensor calibration storage, and battery-powered IoT endpoint configuration retention where minimal pin count, AEC-Q100-aligned temperature range, and self-timed write cycles are critical.
Technical Context
The 11LC020-E/MS implements Manchester-encoded UNI/O® protocol over a single SCIO bidirectional pin, eliminating separate clock lines and reducing PCB routing complexity. Its internal architecture includes a 16-byte page latch, STATUS register with WIP/WEL/BP bits, and slope-controlled output driver to suppress ground bounce.
It uses Schmitt-trigger inputs for noise immunity and supports block write protection (none, 1/4, 1/2, or full array) via nonvolatile BP0/BP1 bits. Write operations are self-timed with 5–10 ms cycle time, and synchronization is maintained through start-header-based clock recovery and MAK-bit re-synchronization logic tolerant to ±0.5% frequency drift per byte.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Density | 2 Kbit (256 × 8 organization) - fixed memory map enabling deterministic address pointer rollover during sequential reads |
| VCC Range | 2.5V to 5.5V - compatible with standard 3.3V and 5V microcontroller I/O without level shifting |
| Interface | Single-pin UNI/O® bus (SCIO) - reduces system pin count and simplifies layout versus I²C/SPI |
| Max Bit Rate | 100 kbps - supports real-time configuration updates in automotive diagnostics and firmware parameter storage |
| Write Endurance | 1,000,000 erase/write cycles - ensures long-term reliability in field-updatable systems like EV battery management calibration tables |
| Data Retention | >200 years at 25°C - guarantees integrity of safety-critical settings across product lifetime without refresh |
| Temp Range | -40°C to +125°C (Automotive E-temp) - qualified for under-hood and powertrain-adjacent applications |
| Standby Current | 1 µA max (I-temp), 5 µA max (E-temp at 125°C) - enables multi-year operation on coin-cell backup in telematics modules |
Pinout & Package
11LC020-E/MS is packaged in an 8-lead MSOP (MS) package with exposed pad, optimized for thermal performance and board area efficiency in automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Internally unconnected; must be left floating or tied to VSS per layout guidelines to avoid parasitic coupling |
| 2 (NC) | No Connect | Internally unconnected; no electrical function - not used for thermal pad attachment |
| 3 (NC) | No Connect | Internally unconnected; avoids signal crosstalk in high-density routing near SCIO |
| 4 (VSS) | Ground Reference | Primary return path for SCIO driver and internal logic; requires low-impedance connection to system ground plane |
| 5 (VCC) | Supply Voltage | Power input for EEPROM core and interface logic; decoupling capacitor (0.1 µF) required within 5 mm |
| 6 (NC) | No Connect | Internally unconnected; maintains pin symmetry for mechanical stability in automated assembly |
| 7 (NC) | No Connect | Internally unconnected; no thermal or ESD function - not a heatsink pad |
| 8 (SCIO) | Serial Clock/Data I/O | Bidirectional Manchester-encoded bus line; integrates clock recovery, Schmitt trigger, and slope control for noise resilience |
Key Features
| Feature | Design Value |
|---|---|
| UNI/O® Single-I/O Interface | Eliminates dedicated clock line and reduces MCU pin usage - ideal for 8-bit microcontrollers with limited GPIO |
| 16-Byte Page Write Buffer | Enables burst writes without host intervention between bytes - cuts firmware overhead by 85% vs. byte-wise programming |
| Status Register (WIP/WEL/BP) | Allows real-time monitoring of write progress and dynamic protection state - essential for fail-safe firmware update sequences |
| Schmitt Trigger + Slope Control | Rejects >50 ns noise spikes and eliminates ground bounce on shared VSS traces - improves robustness in noisy automotive harnesses |
| Block Write Protection | Hardware-enforced protection of 0%, 25%, 50%, or 100% of memory - prevents accidental overwrite of calibration constants or security keys |
| Auto-Erase Before Write | Transparent erase cycle integrated into write command - removes need for explicit erase primitives in application code |
Applications
| Automotive Body Control Unit | Industrial Sensor Calibration Storage |
|---|---|
Use Scenario: Storing door lock actuator position offsets and mirror fold/unfold profiles across vehicle lifecycle. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed during power-up and CAN message-driven reconfiguration. Use Value: Automotive E-temp rating and 1M endurance ensure reliable operation over 15+ years in under-dash environments. |
Use Scenario: Retaining factory-calibrated gain/offset coefficients for pressure transducers in HVAC control panels. IC Role / Device Role / Timing Role: Serial EEPROM interfaced directly to 8-bit MCU GPIO, updated only during manufacturing calibration. Use Value: Block write protection prevents field firmware from corrupting calibrated values during OTA updates. |
| Smart Meter Tamper Log | Medical Infusion Pump Parameter Backup |
Use Scenario: Logging physical tamper events (cover removal, magnetic interference) with timestamp and counter. IC Role / Device Role / Timing Role: Low-power event recorder using standby current ≤1 µA to extend battery life beyond 10 years. Use Value: Self-timed write cycle and page buffer enable atomic log entries without MCU supervision or external timing components. |
Use Scenario: Backing up drug library, dose limits, and user preferences during main power loss in Class II medical devices. IC Role / Device Role / Timing Role: Safety-critical nonvolatile memory with >200-year data retention guaranteeing parameter integrity across device service life. Use Value: Built-in power-on/off write protection prevents corruption during brown-out conditions common in hospital AC mains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 11AA020-I/MS | 1.8–5.5V VCC range; Industrial temp only (-40°C to +85°C); same density, pinout, and UNI/O protocol | Lacks automotive qualification; unsuitable for under-hood or powertrain-adjacent use | Select when cost-sensitive consumer or industrial designs operate below 2.5V or require extended low-VCC support |
| AT24C02C-SSHM-T | I²C interface (2-wire), 1 MHz max clock, 1.7–5.5V, 8-lead SOIC package; no UNI/O compatibility | Requires two MCU pins (SCL/SDA); higher active current (300 µA typical read) | Choose when existing I²C infrastructure exists and single-pin reduction is not critical |
Compared with 11LC020-E/MS, the 11AA020-I/MS offers broader voltage flexibility but lacks automotive temperature certification, while the AT24C02C-SSHM-T provides faster throughput at the cost of additional pin count and higher power - making 11LC020-E/MS optimal for new automotive designs prioritizing pin efficiency and AEC-Q100 compliance.
Availability
11LC020-E/MS is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor calibration, and medical device parameter backup requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 11LC020-E/MS 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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory solutions for embedded control applications.
The 11LC020-E/MS belongs to Microchip's UNI/O® serial EEPROM family, engineered specifically for automotive and industrial systems needing minimal-pin-count, low-power, high-reliability nonvolatile memory with built-in noise immunity and hardware write protection.
FAQ
What is the UNI/O® interface used by the 11LC020-E/MS, and how does it differ from I²C or SPI?
The 11LC020-E/MS uses Microchip's patented UNI/O® bus, a single-wire, Manchester-encoded serial interface that combines clock and data on the SCIO pin. Unlike I²C (2-wire) or SPI (3–4 wires), UNI/O® eliminates dedicated clock lines and address pins, reducing MCU pin count and PCB routing complexity. The 11LC020-E/MS achieves 100 kbps throughput with built-in clock recovery, Schmitt triggering, and slope control - making it distinct from standard I²C or SPI EEPROMs in both physical layer and protocol stack.
Does the 11LC020-E/MS support hardware write protection, and how is it configured?
Yes, the 11LC020-E/MS supports hardware block write protection via two nonvolatile BP0 and BP1 bits in its STATUS register. These bits can be programmed using the WRSR instruction to protect 0%, 25%, 50%, or 100% of the memory array. Protection is enforced at the silicon level - even if the write enable latch (WEL) is set, writes to protected blocks are ignored. This feature is critical for safeguarding calibration data or security keys in automotive and medical applications using the 11LC020-E/MS.
What is the maximum write endurance and data retention specification for the 11LC020-E/MS?
The 11LC020-E/MS guarantees 1,000,000 erase/write cycles per memory location and data retention exceeding 200 years at 25°C. These specifications are validated per JEDEC standards and apply across its full automotive temperature range (-40°C to +125°C). The 11LC020-E/MS achieves this via optimized oxide thickness and Fowler-Nordheim tunneling design - ensuring long-term reliability in safety-critical automotive and industrial deployments where field recalibration is impractical.
Can the 11LC020-E/MS operate from a 1.8V supply?
No, the 11LC020-E/MS is specified for 2.5V to 5.5V operation only. For 1.8V compatibility, Microchip offers the pin-compatible 11AA020-I/MS variant, which shares identical density, page size, UNI/O® protocol, and MSOP packaging but is rated only for Industrial temperature (-40°C to +85°C). The 11LC020-E/MS's higher minimum VCC ensures robust noise margin and timing compliance in electrically noisy automotive environments where 1.8V operation would risk communication errors.
How does the 11LC020-E/MS handle power-loss during a write cycle?
The 11LC020-E/MS incorporates built-in power-on/power-off write protection circuitry that disables write operations when VCC drops below the functional threshold. If power fails mid-write, the internal charge pump aborts the erase/write sequence and leaves memory contents unchanged - preventing partial or corrupted writes. This behavior, combined with the STATUS register's WIP bit, allows host firmware to detect incomplete operations and retry safely. No external capacitors or supervisory circuits are required for basic power-loss immunity in the 11LC020-E/MS.
11LC020-E/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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:
- Single Wire
- Clock Frequency:
- 100 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
11LC020-E/MS FAQ
1.How can I place an order for 11LC020-E/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 11LC020-E/MS 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 11LC020-E/MS reliable?
The price and inventory of 11LC020-E/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 11LC020-E/MS is usually 5 days.
3.What payment methods are accepted for 11LC020-E/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 11LC020-E/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 11LC020-E/MS?
11LC020-E/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 11LC020-E/MS 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 11LC020-E/MS?
For technical support, including 11LC020-E/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 11LC020-E/MS requirements.
6.How does Aetrix verify that 11LC020-E/MS is sourced from the original manufacturer or authorized distributors?
All 11LC020-E/MS 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 11LC020-E/MS meets industry standards.
7.What is the process for return or replacement of 11LC020-E/MS?
All 11LC020-E/MS units undergo pre-shipment inspection (PSI). If there is an issue with 11LC020-E/MS, 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 11LC020-E/MS part is unused and in its original packaging.
Return procedure for 11LC020-E/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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