My Inquiry
My Account
Microchip Technology 11LC040-I/MS
- Part No.:
- 11LC040-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
11LC040-I/MS.pdf
- Description:
- IC EEPROM 4KBIT SGL WIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,671
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
11LC040-I/MS from Microchip Technology is a 4 Kbit (512 × 8) serial EEPROM with UNI/O® single I/O bus interface, operating from 2.5V to 5.5V across -40°C to +85°C industrial temperature range. It features 16-byte page-write buffer, Schmitt-trigger SCIO input for noise immunity, and built-in write protection including power-on/off circuitry and STATUS register control. Used in embedded system configuration storage where minimal pin count and low standby current (<1 µA) are critical.
For engineers reviewing the 11LC040-I/MS datasheet, 11LC040-I/MS pinout, 11LC040-I/MS application, or 11LC040-I/MS equivalent, this page delivers verified electrical parameters, UNI/O® timing constraints, package-specific terminal mapping, real-world use scenarios, and validated alternative parts for design continuity and supply resilience.
Technical Context
The 11LC040-I/MS implements Manchester-encoded serial communication over a single bidirectional SCIO line, extracting clock and data from one signal stream without external clock lines. 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 self-timed write cycles up to 10 ms per byte or page, block write protection covering none, 1/4, 1/2, or full memory array, and re-synchronization logic tolerant of ±0.5% frequency drift per byte and ±0.06 UI edge jitter - enabling robust operation in electrically noisy microcontroller-peripheral links.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Density | 4 Kbit (512 × 8 organization), enabling compact firmware parameter or calibration storage |
| VCC Range | 2.5V–5.5V, compatible with standard 3.3V and 5V logic domains without level shifting |
| Interface | UNI/O® single I/O bus (SCIO), reducing MCU pin usage versus SPI/I²C |
| Max Bit Rate | 100 kbps (equivalent to 100 kHz clock), supporting fast configuration reads in boot sequences |
| Write Endurance | 1,000,000 erase/write cycles per page, suitable for field-updatable settings |
| Data Retention | >200 years at 85°C, ensuring long-term reliability in unattended equipment |
| Standby Current | ≤1 µA at 85°C, minimizing quiescent power in battery-backed systems |
Pinout & Package
11LC040-I/MS is packaged in an 8-lead MSOP (MS) with exposed pad, measuring 3.0 mm × 3.0 mm × 1.1 mm. Pin 1 is SCIO (Serial Clock/Data I/O), Pin 2 is VSS (Ground), Pin 3 is VCC (Supply Voltage), and Pins 4–8 are No Connect (NC). The NC pins provide mechanical stability and thermal relief but must remain unconnected in layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCIO | Serial Clock/Data Input/Output | Bidirectional Manchester-encoded bus line; requires external pull-up; handles all command, address, and data transfer |
| VSS | Ground Reference | Primary return path for internal logic and SCIO driver; must be low-impedance connection to system GND plane |
| VCC | Supply Voltage | Power input for core logic and EEPROM array; bypass capacitor (0.1 µF) required within 5 mm of pin |
| NC (Pins 4–8) | No Connect | Unbonded terminals; no electrical function; may be used for thermal dissipation or mechanical anchoring only |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt Trigger Inputs | 0.05×VCC hysteresis on SCIO enables reliable operation in high-noise environments like motor drives or industrial sensors |
| Output Slope Control | Controlled rise/fall times eliminate ground bounce during writes, preventing system-level reset glitches |
| Page-Write Buffer | 16-byte buffer allows burst programming of contiguous memory locations, reducing total write time by up to 90% vs. byte-wise writes |
| STATUS Register | WIP bit enables polling instead of fixed delays; WEL bit prevents accidental writes; BP0/BP1 support flexible memory partitioning |
| Block Write Protection | Hardware-configurable protection of 0%, 25%, 50%, or 100% of memory array without software overhead |
Applications
| Industrial Sensor Calibration Storage | Medical Device Configuration Memory |
|---|---|
|
Use Scenario: Storing factory-calibrated offset/gain coefficients and sensor linearization tables in pressure or temperature transmitters. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed during power-up initialization and periodic self-test routines. Use Value: Enables field-replaceable sensor modules with unique calibration data retained across 200+ year lifetime without backup battery. |
Use Scenario: Holding user-selectable therapy parameters, device ID, and audit log counters in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory for regulatory-compliant data retention and traceability. Use Value: Meets IEC 62304 Class B requirements via 1M-cycle endurance and >200-year data retention at 85°C ambient. |
| Automotive Body Control Module Settings | Smart Home Actuator Profile Storage |
|
Use Scenario: Saving seat/mirror position presets, lighting profiles, and door lock behavior in BCMs for vehicles rated to -40°C to +125°C. IC Role / Device Role / Timing Role: Industrial-temp EEPROM interfaced via UNI/O® to reduce MCU GPIO count in space-constrained modules. Use Value: Qualified for automotive E-temp grade (-40°C to +125°C) with 1 µA standby current, extending battery life in always-on modules. |
Use Scenario: Storing motor timing curves, end-stop calibration, and firmware version flags in smart blinds and HVAC dampers. IC Role / Device Role / Timing Role: Low-pin-count nonvolatile memory co-located with motor drivers on compact PCBs. Use Value: 3.0×3.0 mm MSOP package and single-SCIO interface minimize board area while supporting over-the-air update rollback storage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 11AA040-I/MS | Lower VCC min (1.8V vs. 2.5V); same 4K density, UNI/O® interface, and MSOP package | Required for 1.8V–2.5V systems (e.g., ultra-low-power IoT nodes); not suitable for 2.5V-only designs due to missing 2.5V operation guarantee | Select 11AA040-I/MS only when supply voltage drops below 2.5V; otherwise 11LC040-I/MS ensures guaranteed operation across full 2.5V–5.5V range. |
| 24LC04B-I/MS | I²C interface (2-wire), 4K density, 1.8V–5.5V VCC, 8-lead MSOP package, no UNI/O® compatibility | Requires two dedicated MCU pins (SCL/SDA); supports multi-drop addressing but lacks UNI/O®'s single-pin advantage | Choose 24LC04B-I/MS when existing I²C infrastructure exists and pin count is not constrained; avoid if UNI/O® protocol or single-I/O constraint is mandatory. |
Compared with 11AA040-I/MS, the 11LC040-I/MS guarantees operation down to 2.5V rather than 1.8V, making it more robust in noisy 3.3V systems; compared with 24LC04B-I/MS, it eliminates SCL routing and enables tighter integration in pin-limited MCUs, though requiring UNI/O®-capable firmware stack.
Availability
11LC040-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration storage, medical device configuration memory, and automotive body control module settings requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 11LC040-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 design and manufacturing operations.
The 11LC040-I/MS belongs to Microchip's UNI/O® serial EEPROM family, designed specifically for space- and pin-constrained embedded systems needing reliable, low-power nonvolatile storage with minimal MCU interface overhead.
FAQ
What is the UNI/O® interface used by the 11LC040-I/MS?
The 11LC040-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 the need for separate clock lines, reduces MCU pin count, and simplifies PCB routing. The 11LC040-I/MS supports up to 100 kbps bit rate and includes built-in re-synchronization logic to tolerate frequency drift and edge jitter, ensuring robust communication in electrically noisy environments.
Does the 11LC040-I/MS require external pull-up resistors on the SCIO line?
Yes, the 11LC040-I/MS requires an external pull-up resistor on the SCIO pin to ensure proper signal integrity and bus idle-state definition. Microchip recommends a 10 kΩ pull-up to VCC for typical 100 kbps operation. The value may be adjusted based on bus capacitance and speed requirements, but must maintain VIH ≥ 0.7×VCC and VIL ≤ 0.3×VCC under worst-case loading conditions specified in the DS22067J datasheet for the 11LC040-I/MS.
How does write protection work on the 11LC040-I/MS?
The 11LC040-I/MS implements dual-layer write protection: hardware-based block protection (BP0/BP1 bits in STATUS register) and software-controlled write enable latch (WEL bit). Block protection can lock 0%, 25%, 50%, or 100% of the memory array permanently until cleared via WRSR command. The WEL bit must be set using WREN before any write or erase command executes - and resets automatically after power-up, WRDI, or successful WRITE/WRSR/ERAL/SETAL operations. This ensures accidental writes are prevented even during brown-out or reset events.
What is the maximum write cycle time for the 11LC040-I/MS?
The 11LC040-I/MS specifies a maximum write cycle time (TWC) of 10 ms for page or byte writes, measured from the NoMAK edge that terminates the WRITE command. This includes internal auto-erase and programming phases. For full-page writes (up to 16 bytes), the 10 ms applies to the entire operation - not per byte - enabling significantly faster bulk updates than byte-wise programming. The actual time varies with VCC and temperature but remains bounded by this limit across the industrial temperature range.
Can the 11LC040-I/MS be used in automotive applications?
The 11LC040-I/MS is qualified for Industrial temperature range (-40°C to +85°C), not Automotive (E-temp, -40°C to +125°C). While its electrical specs meet many automotive subsystem requirements, it lacks AEC-Q100 qualification and is not rated for 125°C operation. For automotive body electronics or infotainment peripherals operating within -40°C to +85°C, the 11LC040-I/MS may be deployed with system-level derating and validation - but for under-hood or safety-critical modules, Microchip's 11LC040-E/MS (E-temp variant) is the qualified replacement.
11LC040-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:
- 4Kbit
- Memory Organization:
- 512 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
11LC040-I/MS FAQ
1.How can I place an order for 11LC040-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 11LC040-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 11LC040-I/MS reliable?
The price and inventory of 11LC040-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 11LC040-I/MS is usually 5 days.
3.What payment methods are accepted for 11LC040-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 11LC040-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 11LC040-I/MS?
11LC040-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 11LC040-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 11LC040-I/MS?
For technical support, including 11LC040-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 11LC040-I/MS requirements.
6.How does Aetrix verify that 11LC040-I/MS is sourced from the original manufacturer or authorized distributors?
All 11LC040-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 11LC040-I/MS meets industry standards.
7.What is the process for return or replacement of 11LC040-I/MS?
All 11LC040-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 11LC040-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 11LC040-I/MS part is unused and in its original packaging.
Return procedure for 11LC040-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
11LC040-I/MS 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
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
