11LC040T-I/TT Microchip Integrated Circuit (SOT23 (3-Pin)) In Stock
11LC040T-I/TT is a 4 Kbit (512 x 8) single-wire serial EEPROM from Microchip operating at 2.5V to 5.5V in a tiny 3-pin SOT-23 package, with up to 1 MHz clock and 1,000,000 write/erase cycle endurance. It uses a UNI/O single-wire interface that requires only one I/O pin, minimizing MCU pin usage in space-constrained designs. Available from global distributors with worldwide shipping.
- Manufacturer
- Microchip
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- 11LC040T-I/TT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.1950(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 4 Kbit (512 bytes) non-volatile EEPROM storage for compact parameter storage
- Single-wire UNI/O interface requires only 1 MCU I/O pin
- Up to 1 MHz clock frequency for efficient serial data access
- 1,000,000 write/erase cycle endurance for long product life
- Operates from 2.5V to 5.5V supply covering a wide voltage range
- Minimum 200-year data retention for long-term non-volatile storage
- Ultra-compact 3-pin SOT-23 package for the smallest PCB footprint
Applications
The 11LC040T-I/TT is ideal for storing configuration data, calibration constants, and serial numbers in space-constrained embedded designs where minimizing MCU pin count is critical. Its single-wire UNI/O interface uses just one I/O line, making it particularly attractive for small microcontrollers with limited I/O pins such as PIC10 or PIC12 devices. The tiny SOT-23 package is well-suited for wearable electronics, sensor nodes, and battery-powered IoT devices requiring minimal board space.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-23-3 |
| Factory Lead Time | 8Weeks |
| YTEOL | 8 |
| Clock Frequency-Max (fCLK) | 1MHz |
| Data Retention Time-Min | 200 |
| Endurance | 1000000 Write/Erase Cycles |
| JESD-30 Code | R-PDSO-G3 |
| JESD-609 Code | e3 |
| Memory Density | 4096bit |
| Memory IC Type | EEPROM |
| Memory Width | 8 |
| Number of Functions | 1 |
| Number of Ports | 1 |
| Number of Words | 512words |
| Number of Words Code | 512 |
| Operating Mode | SYNCHRONOUS |
| Organization | 512X8 |
| Output Characteristics | TOTEM POLE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TO-236 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Parallel/Serial | SERIAL |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Ready/Busy | NO |
| Reverse Pinout | NO |
| Screening Level | AEC-Q100 |
| Serial Bus Type | 1-WIRE |
| Standby Current-Max | 0.000005A |
| Supply Current-Max | 0.005mA |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| Toggle Bit | NO |
| Write Cycle Time-Max (tWC) | 10ms |
| Write Protection | SOFTWARE |
| Package | SOT23 (3-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.32.00.51 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does 11LC040T-I/TT's single-wire UNI/O interface compare to I2C in terms of pin requirements?
The 11LC040T-I/TT uses the Microchip UNI/O single-wire serial interface, requiring only 1 MCU I/O pin, compared to I2C which requires 2 pins (SDA and SCL). This 1-pin advantage is valuable on microcontrollers with fewer than 8 I/O pins, such as PIC10F devices, where saving even 1 pin can enable additional sensor or control connections in the same design.
What is the storage density and maximum clock speed of the 11LC040T-I/TT?
The 11LC040T-I/TT provides 4 Kbits (512 bytes) of EEPROM organized as 512 x 8-bit words, accessible via the single-wire interface at up to 1 MHz clock frequency. This combination provides adequate storage for device serial numbers, trim constants, and small configuration tables while enabling reasonably fast sequential read operations in firmware initialization routines.
For a wearable sensor design operating from a 3.3V LiPo battery, does 11LC040T-I/TT meet the supply voltage requirements?
Yes, the 11LC040T-I/TT operates across a supply voltage range of 2.5V to 5.5V, which fully covers the 3.3V rail typical of LiPo-powered wearables. Its 3-pin SOT-23 package occupies minimal PCB area, and the 1,000,000 write/erase endurance ensures the device can reliably store daily calibration updates over the product's multi-year operational life.
Related Guides
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 2026
ADAQ7768-1 Design Guide for Precision Vibration and Dynamic Signal Measurement
Design ADAQ7768-1 precision data acquisition channels for vibration and dynamic sensing with the right bandwidth, reference, clock, and layout choices.
Jun 30, 2026
AD5204BRZ10 Design Guide for SPI-Controlled Gain and Offset Calibration
Design AD5204BRZ10 digital potentiometer calibration loops with bounded trim span, safe wiper current, clean SPI routing, and reliable startup codes.
Jun 30, 2026
Why Buy from FindMyChip
About Microchip
Microchip is a leading electronic component manufacturer. FindMyChip sources Microchip ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.2700 | $0.27 |
| 100+ | $0.2500 | $25.00 |
| 250+ | $0.2400 | $60.00 |
| 500+ | $0.2100 | $105.00 |
| 1000+ | $0.1950 | $195.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Response time is incredible — usually under 4 hours. They understand that production lines can't wait.”