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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Microchip Technology 11LC020T-I/TT

Name: 11LC020T-I/TT
Brand: Microchip Technology
SKU: 11LC020T-I/TT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 11LC020T-I/TT

Manufacturer:: Microchip Technology

Category:: Memory

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: 11LC020T-I/TT.pdf

Description:: IC EEPROM 2KBIT SGL WIRE SOT23-3

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Product details

Overview

11LC020T-I/TT from Microchip Technology Inc. is a 2 Kbit (256 × 8) serial EEPROM with UNI/O® single I/O bus interface, operating from 2.5V to 5.5V across -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 control. Used in space-constrained embedded systems for parameter storage, calibration data retention, and firmware configuration.

For engineers reviewing the 11LC020T-I/TT datasheet, 11LC020T-I/TT pinout, 11LC020T-I/TT application, or 11LC020T-I/TT equivalent, key selection considerations include its 3-lead SOT-23 (TT) package, UNI/O® protocol timing compliance (10–100 kHz), 1 µA max standby current, 16-byte page buffer, and industrial temperature grade - all critical for low-pin-count, low-power microcontroller peripheral storage.

Technical Context

The 11LC020T-I/TT implements Manchester-encoded serial communication over a single SCIO line, extracting clock and data from one bidirectional signal. Its internal architecture includes a page latch, HV generator for EEPROM programming, and re-synchronization logic tolerant to ±0.50% frequency drift per byte and ±0.06 UI edge jitter.

It operates as a slave device under master-controlled timing, using START header synchronization, MAK/NoMAK acknowledge protocol, and STATUS register (WIP/WEL/BP bits) for real-time write-state visibility and block protection management - enabling robust, noise-immune communication in electrically noisy environments.

Key Specifications

Parameter	Value and Actual Design Meaning
Density	2 Kbit (256 × 8 organization) - supports compact nonvolatile storage for small firmware tables or sensor calibration sets
V_CC 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 count vs. I²C/SPI; requires only one GPIO plus ground and supply
Page Size	16 bytes - enables efficient burst writes while avoiding cross-page boundary wraparound errors
Write Cycle Time	Max. 10 ms (page or byte) - defines minimum delay before polling WIP bit or initiating next command
Endurance	1,000,000 erase/write cycles - ensures long-term reliability in field-updatable systems
Data Retention	> 200 years - guarantees persistent storage of critical configuration data over product lifetime
Temp. Range	-40°C to +85°C (Industrial) - validated for operation in consumer, industrial, and automotive cabin applications

Pinout & Package

11LC020T-I/TT uses the 3-lead SOT-23 (TT) package: compact, surface-mount, footprint-optimized for high-density PCBs. Pin 1 = SCIO (bidirectional serial clock/data), Pin 2 = V_SS (ground), Pin 3 = V_CC (supply voltage). No NC pins - full pin utilization.

Pin/Terminal	Circuit Role	Design Meaning
SCIO	Serial Clock/Data I/O	Manchester-encoded bidirectional bus line - carries clock, address, command, and data; includes Schmitt trigger and slope control
V_SS	Ground Reference	Return path for all internal currents; must be low-impedance to support noise suppression and stable standby current
V_CC	Supply Voltage	Power source for EEPROM array, logic, and HV generator; decoupling capacitor required per datasheet layout guidelines

Key Features

Feature	Design Value
UNI/O® Serial Interface	Single I/O eliminates need for dedicated clock/SCL and data/SDA lines - saves MCU pins and routing complexity
Schmitt Trigger Input	Input hysteresis ≥ 0.05×V_CC - rejects EMI and supply noise on SCIO line in noisy industrial environments
Output Slope Control	Controlled edge rate on SCIO - prevents ground bounce and signal integrity issues during fast transitions
Status Register Access	Real-time read of WIP (write-in-progress), WEL (write-enable latch), and BP (block protect) bits - enables safe polling and protection state verification
Block Write Protection	Configurable via STATUS register to protect 0%, 25%, 50%, or 100% of memory - prevents accidental overwrite of critical firmware or calibration zones
Power-On/Off Write Protection	Hardware-enforced lockout during V_CC ramp-up/down - eliminates corruption risk during brown-out or reset conditions

Applications

Smart Sensor Calibration Storage	IoT Device Configuration Memory
Use Scenario: Storing factory-calibrated offset/gain coefficients and temperature compensation tables in MEMS accelerometers and environmental sensors. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed at boot and during runtime recalibration; UNI/O® timing allows deterministic read latency under 100 µs. Use Value: Enables plug-and-play accuracy without host MCU flash overhead; 200-year retention ensures calibration persistence across product lifecycle.	Use Scenario: Holding Wi-Fi credentials, OTA update flags, and user preferences in battery-powered BLE mesh nodes. IC Role / Device Role / Timing Role: Low-power configuration manager interfaced via MCU GPIO; 1 µA standby current extends coin-cell life beyond 5 years. Use Value: Eliminates need for larger SPI EEPROM or MCU internal flash wear-leveling - reduces BOM cost and firmware complexity.
Industrial PLC I/O Module Settings	Automotive Body Control Unit (BCU) Trim Data
Use Scenario: Saving channel-specific scaling factors, alarm thresholds, and input filter settings in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Industrial-grade serial EEPROM providing tamper-resistant storage; withstands 4 kV ESD per IEC 61000-4-2. Use Value: Ensures settings survive power cycling and field reconfiguration; block protection prevents misconfiguration during firmware updates.	Use Scenario: Storing seat position memory, mirror angle presets, and lighting dimming profiles in automotive interior modules. IC Role / Device Role / Timing Role: AEC-Q100 qualified (E-temp variant available) nonvolatile memory with -40°C to +85°C operation - matches BCU thermal envelope. Use Value: Delivers reliable personalization data retention across vehicle lifetime without requiring CAN-based external memory.

Smart Sensor Calibration Storage

IoT Device Configuration Memory

Use Scenario: Storing factory-calibrated offset/gain coefficients and temperature compensation tables in MEMS accelerometers and environmental sensors.

IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed at boot and during runtime recalibration; UNI/O® timing allows deterministic read latency under 100 µs.

Use Value: Enables plug-and-play accuracy without host MCU flash overhead; 200-year retention ensures calibration persistence across product lifecycle.

Use Scenario: Holding Wi-Fi credentials, OTA update flags, and user preferences in battery-powered BLE mesh nodes.

IC Role / Device Role / Timing Role: Low-power configuration manager interfaced via MCU GPIO; 1 µA standby current extends coin-cell life beyond 5 years.

Use Value: Eliminates need for larger SPI EEPROM or MCU internal flash wear-leveling - reduces BOM cost and firmware complexity.

Industrial PLC I/O Module Settings

Automotive Body Control Unit (BCU) Trim Data

Use Scenario: Saving channel-specific scaling factors, alarm thresholds, and input filter settings in DIN-rail mounted programmable logic controllers.

IC Role / Device Role / Timing Role: Industrial-grade serial EEPROM providing tamper-resistant storage; withstands 4 kV ESD per IEC 61000-4-2.

Use Value: Ensures settings survive power cycling and field reconfiguration; block protection prevents misconfiguration during firmware updates.

Use Scenario: Storing seat position memory, mirror angle presets, and lighting dimming profiles in automotive interior modules.

IC Role / Device Role / Timing Role: AEC-Q100 qualified (E-temp variant available) nonvolatile memory with -40°C to +85°C operation - matches BCU thermal envelope.

Use Value: Delivers reliable personalization data retention across vehicle lifetime without requiring CAN-based external memory.

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
11AA020T-I/TT	1.8–5.5V V_CC range; same density, page size, and UNI/O® interface - lower voltage operation enabled by different process	Required where main system rail is 1.8V or 2.5V; not suitable for pure 5V-only designs without level translation	Select 11AA020T-I/TT when powering from 1.8V/2.5V rails; otherwise 11LC020T-I/TT provides wider margin at 5V.
24AA02T-I/TT	I²C interface (2-wire), 2 Kbit, 1.8–5.5V, 8-lead SOT-23-8 package - requires two GPIOs and pull-ups; no UNI/O® protocol stack needed	Preferred in designs already using I²C peripherals; incompatible pinout and protocol - not drop-in replaceable	Choose 24AA02T-I/TT if I²C infrastructure exists and pin count permits; avoid if minimizing GPIO usage is critical.

Compared with 11AA020T-I/TT, the 11LC020T-I/TT trades lower-voltage flexibility for higher noise immunity at 5V operation and tighter V_CC regulation tolerance; versus 24AA02T-I/TT, it delivers true single-pin serial simplicity but requires UNI/O® driver implementation - a trade-off between hardware simplicity and firmware overhead.

Availability

11LC020T-I/TT is available at Aetrix Electronics and suitable for smart sensor calibration storage, IoT device configuration memory, and industrial PLC I/O module settings requiring stable component supply, long-lifecycle support, and guaranteed industrial temperature performance.

Supply support for 11LC020T-I/TT 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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 11LC020T-I/TT belongs to Microchip's UNI/O® serial EEPROM family, designed specifically for ultra-low-pin-count, low-power embedded systems needing reliable, compact nonvolatile storage without sacrificing noise immunity or protocol robustness.

FAQ

What is the UNI/O® interface used by the 11LC020T-I/TT, and how does it differ from I²C or SPI?

The 11LC020T-I/TT uses Microchip's patented UNI/O® bus - a single-wire, Manchester-encoded serial interface that combines clock and data into one bidirectional SCIO line. Unlike I²C (2-wire, open-drain) or SPI (4-wire, full-duplex), UNI/O® requires only one GPIO, eliminating pull-ups, clock skew concerns, and pin overhead. The 11LC020T-I/TT implements this protocol with built-in re-synchronization logic tolerant to frequency drift and edge jitter, making it ideal for resource-constrained MCUs.

Does the 11LC020T-I/TT support write protection, and how is it configured?

Yes, the 11LC020T-I/TT supports configurable block write protection via its STATUS register. Bits BP1 and BP0 allow protection of 0%, 25%, 50%, or 100% of the 2 Kbit memory array. Protection is set using the WRSR (Write Status Register) command after enabling writes with WREN. Additionally, hardware write protection activates automatically during power-up/down transitions, preventing corruption during brown-out events - a feature integral to the 11LC020T-I/TT's reliability design.

What is the maximum write speed and page buffer size of the 11LC020T-I/TT?

The 11LC020T-I/TT supports a maximum serial bus frequency of 100 kHz (equivalent to 100 kbps), with typical write cycle time of 5 ms for byte writes and up to 10 ms for full 16-byte page writes. Its page buffer holds up to 16 bytes, enabling efficient burst programming within a single physical page (0x00–0x0F, 0x10–0x1F, etc.). Crossing page boundaries causes wraparound - a behavior explicitly documented for the 11LC020T-I/TT and requiring firmware awareness.

Is the 11LC020T-I/TT pin-compatible with other devices in the 11XX family?

The 11LC020T-I/TT in SOT-23-3 (TT) package shares identical pinout (SCIO/V_SS/V_CC) with all other 11XX-series TT-packaged variants, including 11LC010T-I/TT, 11LC040T-I/TT, and 11AA020T-I/TT. However, device addressing differs: 11LC020T-I/TT uses hardwired address 0xA0, while 11LC161T-I/TT uses 0xA1. Firmware must match the correct device address - a key functional distinction despite mechanical pin compatibility.

What are the key electrical parameters that define low-power operation for the 11LC020T-I/TT?

The 11LC020T-I/TT achieves ultra-low-power operation with 1 µA maximum standby current (I-temp) and 1 mA typical active current at 5.5V. Its DC characteristics include VIH ≥ 0.7×V_CC, VIL ≤ 0.3×V_CC, and VOL ≤ 0.4V at 300 µA - ensuring robust logic-level compatibility across its 2.5–5.5V range. These values are measured and specified in DS22067J, directly supporting battery-powered and energy-harvesting applications where the 11LC020T-I/TT's power profile is a primary selection criterion.

11LC020T-I/TT Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

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:: 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:: SOT-23-3

11LC020T-I/TT FAQ

1.How can I place an order for 11LC020T-I/TT through Aetrix?

Please submit a Request for Quotation (RFQ) for 11LC020T-I/TT 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 11LC020T-I/TT reliable?

The price and inventory of 11LC020T-I/TT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 11LC020T-I/TT is usually 5 days.

3.What payment methods are accepted for 11LC020T-I/TT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 11LC020T-I/TT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 11LC020T-I/TT?

11LC020T-I/TT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 11LC020T-I/TT 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 11LC020T-I/TT?

For technical support, including 11LC020T-I/TT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 11LC020T-I/TT requirements.

6.How does Aetrix verify that 11LC020T-I/TT is sourced from the original manufacturer or authorized distributors?

All 11LC020T-I/TT 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 11LC020T-I/TT meets industry standards.

7.What is the process for return or replacement of 11LC020T-I/TT?

All 11LC020T-I/TT units undergo pre-shipment inspection (PSI). If there is an issue with 11LC020T-I/TT, 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 11LC020T-I/TT part is unused and in its original packaging.

Return procedure for 11LC020T-I/TT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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