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Microchip Technology 11LC020-I/MS
- Part No.:
- 11LC020-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
11LC020-I/MS.pdf
- Description:
- IC EEPROM 2KBIT SGL WIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,022
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Product details
Overview
11LC020-I/MS from Microchip Technology is a 2 Kbit (256 x 8) serial EEPROM with UNI/O® single I/O bus interface, operating from 2.5V to 5.5V over -40°C to +85°C. It features 16-byte page-write buffer, Schmitt-trigger SCIO input, output slope control, and built-in write protection including power-on/off circuitry and STATUS register with WIP/WEL bits. Used in embedded system configuration storage where minimal pin count and low standby current (<1 µA) are critical.
For engineers reviewing the 11LC020-I/MS datasheet, 11LC020-I/MS pinout, 11LC020-I/MS application, or 11LC020-I/MS equivalent, key selection considerations include its 3-lead MSOP package, UNI/O® protocol timing compliance (100 kbps max), industrial temperature range, and block write protection granularity (none/1/4/1/2/all).
Technical Context
The 11LC020-I/MS implements Manchester-encoded serial communication on a single SCIO line, extracting clock and data from one bidirectional signal. Its internal architecture includes a 16-byte page latch, STATUS register with nonvolatile BP0/BP1 bits, and HV generator for EEPROM programming.
It supports four block protection modes via STATUS register writes, enforces write enable latch (WEL) control, and uses re-synchronization logic tolerant to ±0.5% frequency drift per byte and ±0.06 UI edge jitter - essential for reliable operation with low-cost microcontroller GPIOs.
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 logic domains without level shifting. |
| Interface | UNI/O® single I/O bus - reduces MCU pin usage vs. I²C/SPI; requires no external clock or chip select lines. |
| Page Size | 16 bytes - defines maximum atomic write burst; crossing physical page boundaries causes wraparound, not auto-advance. |
| Write Cycle Time | 5 ms (byte or page) - determines minimum time between write commands; self-timed with no external polling required beyond WIP bit check. |
| Endurance | 1,000,000 erase/write cycles - supports frequent firmware parameter updates in industrial logging applications. |
| Data Retention | >200 years - ensures long-term reliability in unattended equipment such as utility meters or sensor nodes. |
| Standby Current | 1 µA max (I-temp) - enables multi-year battery life in always-on IoT endpoint devices. |
Pinout & Package
11LC020-I/MS is packaged in an 8-lead MSOP (MS) with exposed pad, footprint-compatible with SOIC-8 but 30% smaller. Pin 1 is SCIO (bidirectional serial clock/data), Pin 2 is VSS (ground), Pin 3 is VCC (supply), and Pins 4–8 are NC (no connect). The NC pins provide mechanical stability and thermal dissipation without electrical function.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCIO | Serial Clock/Data I/O | Bidirectional Manchester-encoded bus line; integrates clock recovery, Schmitt trigger input, and slope-controlled output to suppress ground bounce. |
| VSS | Ground Reference | Primary return path for all internal currents; must be low-impedance to maintain noise immunity of SCIO signal. |
| VCC | Supply Voltage | Power source for EEPROM array, logic, and HV generator; decoupling capacitor required within 1 cm of pin. |
| NC (Pins 4–8) | No Connect | Unused terminals; left floating or tied to VSS for mechanical reinforcement - no electrical connection to die. |
Key Features
| Feature | Design Value |
|---|---|
| UNI/O® Serial Interface | Single-pin bus eliminates need for dedicated clock/SCL and data/SDA lines - reduces PCB routing complexity and MCU pin count. |
| Page-Write Buffer (16 B) | Enables burst writes up to full page size in one command, reducing total write time by ~75% vs. byte-wise writes for contiguous data. |
| Status Register (WIP/WEL/BP) | Allows real-time monitoring of write progress (WIP), verification of write-enable state (WEL), and nonvolatile configuration of 4-level block protection (BP0/BP1). |
| Schmitt Trigger Input | Provides 50 mV hysteresis on SCIO to reject noise spikes ≤50 ns - critical for robust operation in electrically noisy industrial environments. |
| Output Slope Control | Actively limits dV/dt on SCIO transitions to prevent ground bounce-induced logic errors during high-speed bus activity. |
| Auto-Erase Write Cycle | Integrates erase and program phases automatically - no separate erase command needed before writing new data to a location. |
Applications
| Industrial Sensor Calibration Storage | Medical Device Configuration Memory |
|---|---|
|
Use Scenario: Storing factory-calibrated offset/gain coefficients and user-adjusted thresholds in a portable blood glucose meter. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed at power-up and during field recalibration; UNI/O® interface minimizes MCU pin usage in space-constrained housing. Use Value: 256 × 8 capacity holds 32 calibration records; 1 µA standby current extends battery life beyond 5 years; block protection prevents accidental overwrite of critical calibration data. |
Use Scenario: Holding patient-specific therapy parameters and device serial number in an implantable neurostimulator programmer. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter store interfaced via isolated GPIO; STATUS register enables runtime verification of write-enable state before critical updates. Use Value: Built-in power-on write protection prevents corruption during brown-out events; >200-year data retention meets ISO 13485 long-term traceability requirements. |
| Automotive Body Control Module (BCM) | Smart Home Thermostat Settings |
|
Use Scenario: Saving seat/mirror position presets and lighting profiles in a vehicle BCM operating across -40°C to +125°C ambient. IC Role / Device Role / Timing Role: Industrial-grade EEPROM supporting automotive E-temp qualification; UNI/O® simplifies integration into existing CAN-node microcontrollers with limited GPIO. Use Value: 2.5–5.5V VCC range matches automotive battery voltage swing; 1M endurance supports daily user adjustments over 10+ year vehicle lifetime. |
Use Scenario: Retaining user schedules, HVAC setpoints, and Wi-Fi credentials across power cycles in a battery-powered smart thermostat. IC Role / Device Role / Timing Role: Low-power configuration memory accessed infrequently; MSOP-8 package enables compact 2-layer PCB layout. Use Value: 1 µA max standby current allows CR2032 coin cell operation for >2 years; page-write buffer accelerates OTA firmware update parameter storage. |
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 vs. 2.5–5.5V; identical density, package, and UNI/O® protocol. | Required for 1.8V systems (e.g., ultra-low-power MCUs); not suitable for 2.5V-only designs due to lower VCC min. | Select 11AA020-I/MS only when supply voltage drops below 2.5V; otherwise 11LC020-I/MS offers tighter VCC tolerance and higher noise margin. |
| AT24C02C-SSHM-T | I²C interface (2-wire), 1 MHz max clock, 8-lead SOIC package; no UNI/O® or page buffer. | Requires two dedicated MCU pins (SCL/SDA); lacks slope control and Schmitt trigger - more susceptible to noise in shared PCB traces. | Choose only if existing design already uses I²C infrastructure; 11LC020-I/MS provides superior noise immunity and pin efficiency in new designs. |
Compared with 11AA020-I/MS, the 11LC020-I/MS trades 1.8V operation for improved noise immunity at 2.5V+, while versus AT24C02C it delivers single-pin simplicity and integrated signal conditioning - critical for cost-sensitive, space-constrained embedded systems.
Availability
11LC020-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive body control modules requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 11LC020-I/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 leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.
The 11LC020-I/MS belongs to Microchip's UNI/O® serial EEPROM family, designed specifically for ultra-low-pin-count embedded systems where minimizing MCU GPIO usage and board space is critical without sacrificing reliability or data integrity.
FAQ
What is the UNI/O® interface used by the 11LC020-I/MS?
The 11LC020-I/MS uses Microchip's patented UNI/O® bus, a single-wire, Manchester-encoded serial interface that combines clock and data on the SCIO pin. This eliminates separate clock and data lines, reducing MCU pin count and PCB routing complexity. The 11LC020-I/MS supports up to 100 kbps and includes built-in clock recovery, making it compatible with standard GPIOs configured for precise timing.
Does the 11LC020-I/MS require external pull-up resistors on the SCIO line?
No, the 11LC020-I/MS does not require external pull-up resistors on the SCIO line. Its internal output driver includes active slope control and current limiting, and the UNI/O® protocol relies on active drive rather than open-drain topology. External pull-ups may interfere with Manchester encoding timing and are explicitly omitted from Microchip's recommended schematics for the 11LC020-I/MS.
How does block write protection work on the 11LC020-I/MS?
Block write protection on the 11LC020-I/MS is controlled by BP0 and BP1 bits in the nonvolatile STATUS register, configurable via the WRSR command. These bits enable four protection modes: no protection, protect top 1/4 (64 bytes), protect top 1/2 (128 bytes), or protect entire array (256 bytes). Protection is enforced at the hardware level - writes to protected regions are ignored, and the WIP bit remains clear.
What is the maximum write speed achievable with the 11LC020-I/MS?
The 11LC020-I/MS supports a maximum serial bus frequency of 100 kHz (100 kbps), corresponding to a minimum bit period of 10 µs. While individual byte writes complete in ≤5 ms, the effective sustained write throughput is limited by bus timing: a 16-byte page write requires ≥1,600 µs of bus time plus 5 ms internal programming, yielding ~2.5 KB/s peak effective rate under ideal conditions. The 11LC020-I/MS does not support faster clocks.
Can the 11LC020-I/MS be used in automotive applications?
Yes, the 11LC020-I/MS is qualified for automotive applications under the E-temp grade (-40°C to +125°C), as confirmed in the DEVICE SELECTION TABLE of DS22067J. It shares identical electrical specifications and UNI/O® timing compliance with its I-temp counterpart but undergoes additional screening for automotive reliability. The 11LC020-I/MS part number denotes I-temp; for automotive use, the correct variant is 11LC020-E/MS - not the I/MS version.
11LC020-I/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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
11LC020-I/MS FAQ
1.How can I place an order for 11LC020-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 11LC020-I/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-I/MS reliable?
The price and inventory of 11LC020-I/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-I/MS is usually 5 days.
3.What payment methods are accepted for 11LC020-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 11LC020-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 11LC020-I/MS?
11LC020-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 11LC020-I/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-I/MS?
For technical support, including 11LC020-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 11LC020-I/MS requirements.
6.How does Aetrix verify that 11LC020-I/MS is sourced from the original manufacturer or authorized distributors?
All 11LC020-I/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-I/MS meets industry standards.
7.What is the process for return or replacement of 11LC020-I/MS?
All 11LC020-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 11LC020-I/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-I/MS part is unused and in its original packaging.
Return procedure for 11LC020-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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