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Microchip Technology 11LC020T-E/TT
- Part No.:
- 11LC020T-E/TT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
11LC020T-E/TT.pdf
- Description:
- IC EEPROM 2KBIT SGL WIRE SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,550
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Product details
Overview
11LC020T-E/TT from Microchip Technology Inc. is a 2 Kbit (256 × 8) serial EEPROM using the UNI/O® single I/O bus interface, operating from 2.5V to 5.5V across -40°C to +125°C (Automotive grade), with 16-byte page write buffer, Schmitt-trigger SCIO input, and built-in write protection for automotive body control modules and sensor calibration storage.
For engineers reviewing the 11LC020T-E/TT datasheet, 11LC020T-E/TT pinout, 11LC020T-E/TT application, or 11LC020T-E/TT equivalent, key selection criteria include UNI/O® bus compatibility, automotive temperature range compliance, 100 kbps max bit rate, 1 µA standby current (max), and 3-lead SOT-23 (TT) package footprint constraints.
Technical Context
The 11LC020T-E/TT implements Manchester-encoded serial communication over a single SCIO line, extracting clock and data from one bidirectional signal. Its internal architecture includes a 16-byte page latch, STATUS register with WIP/WEL/BP bits, and current-limited slope-controlled output driver to suppress ground bounce.
It supports full read/write operations via START header synchronization, MAK/NoMAK acknowledge protocol, and automatic re-synchronization during each MAK bit to tolerate ±0.50% frequency drift per byte and ±0.06 UI edge jitter - critical for robust operation in electrically noisy automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Density | 2 Kbit (256 × 8 organization) - fixed memory map enabling deterministic addressing in resource-constrained microcontroller systems. |
| VCC Range | 2.5V to 5.5V - compatible with standard 3.3V and 5V automotive supply rails without level-shifting. |
| Interface | UNI/O® single I/O bus - reduces PCB routing complexity and pin count versus I²C/SPI, requiring only SCIO, VCC, and VSS. |
| Max Bit Rate | 100 kbps (equivalent to 100 kHz clock) - sufficient for configuration storage, calibration data logging, and firmware parameter updates. |
| Write Endurance | 1,000,000 erase/write cycles - ensures long-term reliability in applications requiring frequent field updates (e.g., odometer, battery SOC tables). |
| Data Retention | >200 years at +85°C - guarantees nonvolatile storage integrity over full vehicle lifecycle under elevated under-hood temperatures. |
| Standby Current | 1 µA maximum (I-temp), 5 µA max at +125°C - enables ultra-low-power operation in always-on automotive subsystems. |
| Operating Temp | -40°C to +125°C (Automotive E-grade) - qualified for engine bay, transmission control, and ADAS sensor nodes. |
Pinout & Package
11LC020T-E/TT is housed in a 3-lead SOT-23 package (TT suffix), with SCIO as the sole bidirectional serial I/O, VCC for power supply, and VSS for ground reference. No NC pins are present in this variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SCIO) | Serial Clock/Data I/O | Manchester-encoded bidirectional bus line - carries both clock and data; requires external pull-up; supports Schmitt-trigger noise immunity and slope-controlled edge rates. |
| 2 (VSS) | Ground | Primary return path for all internal circuitry and SCIO driver - must be low-impedance to maintain signal integrity and minimize ground bounce. |
| 3 (VCC) | Supply Voltage | Power input for EEPROM core and I/O driver - accepts 2.5–5.5V; internal regulation ensures stable operation across voltage transients. |
Key Features
| Feature | Design Value |
|---|---|
| UNI/O® Serial Interface | Single-pin bus eliminates dedicated clock line and address pins - reduces MCU GPIO usage and simplifies layout in space-constrained automotive modules. |
| Page Write Buffer (16 bytes) | Enables burst writes within a 16-byte physical page boundary - cuts total write time vs. byte-by-byte programming and improves system responsiveness. |
| Status Register Access | Real-time monitoring of Write-In-Progress (WIP) and Write-Enable Latch (WEL) bits via RDSR command - allows host MCU to avoid polling delays and manage write concurrency safely. |
| Block Write Protection | Configurable protection of none / 1/4 / 1/2 / full array via BP0/BP1 bits - prevents accidental overwrites of critical calibration or security keys during field updates. |
| Auto-Erase & Self-Timed Write | No external timing control needed - internal logic handles erase-before-write and verifies completion, freeing MCU resources during EEPROM programming. |
| Schmitt Trigger + Slope Control | Rejects high-frequency noise on SCIO and eliminates ground bounce during transitions - essential for reliable communication in noisy 12V automotive electrical systems. |
Applications
| Body Control Module (BCM) | Engine Control Unit (ECU) Calibration Storage |
|---|---|
|
Use Scenario: Storing user-configurable settings (door lock behavior, mirror position, lighting profiles) that persist across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed infrequently via UNI/O® bus during initialization or setting changes. Use Value: 2 Kbit capacity matches typical BCM parameter sets; 1 µA standby current extends battery life in parked vehicle mode; automotive temp rating ensures reliability under hood exposure. |
Use Scenario: Holding engine trim tables, fuel injection timing offsets, and OBD-II diagnostic codes updated during dealer reprogramming. IC Role / Device Role / Timing Role: Field-updatable calibration store interfaced to main MCU via single GPIO, supporting secure write-protection schemes. Use Value: Block write protection prevents corruption of active calibration pages; 1M endurance supports repeated dealership updates over vehicle lifetime. |
| Occupant Detection System | Advanced Driver Assistance Systems (ADAS) Sensor Offset Storage |
|
Use Scenario: Saving seat occupancy status, weight thresholds, and airbag deployment logic parameters calibrated per vehicle build. IC Role / Device Role / Timing Role: Low-pin-count EEPROM for safety-critical parameter retention, accessed during power-on self-test. Use Value: SOT-23 package fits tight PCB areas near seat sensors; -40°C to +125°C rating covers cabin-to-seat rail thermal zones; ESD >4 kV withstands assembly handling. |
Use Scenario: Storing camera/lidar sensor zero-point offsets and lens distortion coefficients that require periodic recalibration after collision repair or component replacement. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for sensor metadata accessed only during factory or service-mode calibration routines. Use Value: STATUS register enables runtime verification of write-enable state; page buffer allows fast bulk upload of multi-parameter offset tables during service procedures. |
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 VCC range; Industrial (-40°C to +85°C) temp grade only; same 2 Kbit density and UNI/O® interface. | Lacks automotive qualification; unsuitable for under-hood or powertrain applications requiring +125°C operation. | Select only for cost-sensitive consumer or industrial designs where extended temperature range is unnecessary. |
| AT24C02C-SSHM-T | I²C interface (2-wire), 2 Kbit, 1.7–5.5V, -40°C to +125°C; no UNI/O® compatibility; different pinout (8-lead SOIC). | Requires two dedicated MCU pins (SCL/SDA); incompatible bus protocol; larger footprint; lacks slope control and Schmitt trigger. | Choose only when existing I²C infrastructure exists and UNI/O® pin reduction is not required. |
Compared with 11LC020T-E/TT, the 11AA020T-I/TT trades automotive qualification for wider low-voltage operation, while the AT24C02C-SSHM-T abandons UNI/O® simplicity for standardized I²C ecosystem support - neither offers drop-in replacement capability due to interface, package, or qualification mismatches.
Availability
11LC020T-E/TT is available at Aetrix Electronics and suitable for automotive body control modules, engine calibration storage, occupant detection systems, and ADAS sensor offset storage requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 11LC020T-E/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 11LCXXX family was designed specifically for automotive and industrial applications demanding minimal pin count, high noise immunity, and guaranteed operation across extreme temperature ranges - with 11LC020T-E/TT targeting cost-optimized, space-constrained EEPROM needs in safety-critical subsystems.
FAQ
What is the UNI/O® interface used by the 11LC020T-E/TT, and how does it differ from I²C or SPI?
The 11LC020T-E/TT uses Microchip's patented UNI/O® bus - a single-wire, Manchester-encoded serial interface where clock and data are combined into one SCIO signal. Unlike I²C (2-wire) or SPI (3–4 wires), UNI/O® requires only one GPIO, eliminating dedicated clock lines and reducing MCU pin usage. It also features built-in synchronization, jitter tolerance, and slope control optimized for noisy automotive environments - capabilities not inherent to standard I²C or SPI peripherals.
Does the 11LC020T-E/TT support write protection, and how is it configured?
Yes, the 11LC020T-E/TT supports configurable block write protection via two nonvolatile BP0 and BP1 bits in its STATUS register. These bits - set using the WRSR command - enable protection of none, 1/4, 1/2, or the entire memory array. Protection is hardware-enforced and persists through power cycles. The 11LC020T-E/TT also includes built-in power-on/off data protection and a write-enable latch (WEL) that must be set via WREN before any write operation can proceed.
What is the maximum write speed and endurance specification for the 11LC020T-E/TT?
The 11LC020T-E/TT supports a maximum bit rate of 100 kbps (equivalent to 100 kHz), with typical write cycle times of 5 ms for byte writes and up to 10 ms for page writes. Its endurance is rated at 1,000,000 erase/write cycles per memory location, verified at 25°C and 5.5V. Data retention exceeds 200 years at +85°C, ensuring long-term reliability in automotive applications subject to thermal cycling and extended service life.
Can the 11LC020T-E/TT operate reliably in automotive under-hood environments?
Yes, the 11LC020T-E/TT is qualified for Automotive E-grade operation from -40°C to +125°C and packaged in a Pb-free, RoHS-compliant 3-lead SOT-23 (TT) case. Its design includes Schmitt-trigger inputs for noise suppression, slope-controlled output edges to eliminate ground bounce, and ESD protection exceeding 4,000V - all validated for use in engine control units, transmission modules, and other under-hood electronics exposed to voltage transients and electromagnetic interference.
How does the 16-byte page write buffer function in the 11LC020T-E/TT?
The 11LC020T-E/TT incorporates a 16-byte page write buffer that allows up to 16 consecutive bytes to be loaded into temporary latches before initiating the internal write cycle. This reduces total programming time compared to byte-wise writes and minimizes MCU intervention. However, page boundaries are fixed at 16-byte intervals (e.g., 0x00–0x0F), and crossing a boundary causes wraparound - so software must ensure all bytes in a single WRITE command reside within the same physical page to avoid unintended overwrites.
11LC020T-E/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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
11LC020T-E/TT FAQ
1.How can I place an order for 11LC020T-E/TT through Aetrix?
Please submit a Request for Quotation (RFQ) for 11LC020T-E/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-E/TT reliable?
The price and inventory of 11LC020T-E/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-E/TT is usually 5 days.
3.What payment methods are accepted for 11LC020T-E/TT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 11LC020T-E/TT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 11LC020T-E/TT?
11LC020T-E/TT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 11LC020T-E/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-E/TT?
For technical support, including 11LC020T-E/TT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 11LC020T-E/TT requirements.
6.How does Aetrix verify that 11LC020T-E/TT is sourced from the original manufacturer or authorized distributors?
All 11LC020T-E/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-E/TT meets industry standards.
7.What is the process for return or replacement of 11LC020T-E/TT?
All 11LC020T-E/TT units undergo pre-shipment inspection (PSI). If there is an issue with 11LC020T-E/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-E/TT part is unused and in its original packaging.
Return procedure for 11LC020T-E/TT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
11LC020T-E/TT Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
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