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Microchip Technology 11LC040-I/SN
- Part No.:
- 11LC040-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
11LC040-I/SN.pdf
- Description:
- IC EEPROM 4KBIT SGL WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:369
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Product details
Overview
11LC040-I/SN from Microchip Technology Inc. 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, output slope control, and built-in write protection for use in space-constrained embedded systems requiring nonvolatile parameter storage.
For engineers reviewing the 11LC040-I/SN datasheet, 11LC040-I/SN pinout, 11LC040-I/SN application, or 11LC040-I/SN equivalent, this device delivers deterministic Manchester-encoded timing at up to 100 kHz, supports byte/page write with auto-erase, and integrates STATUS register access for real-time WIP/WEL monitoring - critical for robust firmware update and calibration data retention in resource-limited microcontroller peripherals.
Technical Context
The 11LC040-I/SN implements a master-slave UNI/O® protocol over a single bidirectional SCIO line using Manchester encoding to embed clock and data. Its internal architecture includes a 16-byte page latch, HV generator for EEPROM programming, and re-synchronization circuitry tolerant to ±0.5% frequency drift per byte and ±0.06 UI edge jitter.
It operates in three power states: active (≤3 mA at 2.5V), standby (≤1 µA max), and idle (≤50 µA), with automatic transition triggered by SCIO level transitions and command validity checks. Block write protection is controlled via BP0/BP1 bits in the nonvolatile STATUS register, enabling selective protection of 0%, 25%, 50%, or 100% of memory array.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Density | 4 Kbit (512 × 8 organization) - fixed address space usable for configuration storage without external address lines. |
| VCC Range | 2.5V to 5.5V - compatible with standard 3.3V and 5V logic domains; excludes 1.8V operation (unlike AA-series variants). |
| Interface | Single I/O UNI/O® bus with Manchester encoding - eliminates need for dedicated clock line, reduces PCB routing complexity. |
| Max Bit Rate | 100 kbps (equivalent to 100 kHz clock) - defines maximum sustained data throughput for firmware parameter writes. |
| Write Endurance | 1,000,000 erase/write cycles - ensures long-term reliability for frequently updated calibration or logging data. |
| Data Retention | >200 years - guarantees nonvolatile storage integrity across product lifetime without refresh. |
| ESD Protection | >4,000 V HBM - provides robustness against handling and system-level electrostatic discharge events. |
Pinout & Package
11LC040-I/SN is packaged in 8-lead SOIC (SN) with exposed pad not present; pinout matches standard SOIC-8 footprint. All pins are electrically defined per DS22067J-page 2 Pin Function Table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Internally unconnected; must be left floating or tied to VSS per layout guidelines. |
| 2 (NC) | No Connect | Internally unconnected; no electrical function; avoid routing signals to this pin. |
| 3 (NC) | No Connect | Internally unconnected; unused in 11LC040-I/SN; not bonded in die. |
| 4 (VSS) | Ground Reference | Primary return path for all internal current; requires low-impedance connection to system ground plane. |
| 5 (VCC) | Supply Voltage | Power input for core logic and EEPROM array; bypass capacitor (0.1 µF) required within 5 mm. |
| 6 (NC) | No Connect | Internally unconnected; no function; do not tie to any voltage or signal. |
| 7 (NC) | No Connect | Internally unconnected; reserved for future family expansion; leave unconnected. |
| 8 (SCIO) | Serial Clock/Data I/O | Bidirectional Manchester-encoded bus line; requires 4.7 kΩ pull-up to VCC; drives only one device per bus segment. |
Key Features
| Feature | Design Value |
|---|---|
| UNI/O® Single I/O Interface | Reduces MCU GPIO usage to one pin while maintaining full read/write functionality - ideal for pin-limited 8-bit microcontrollers. |
| Schmitt Trigger Input on SCIO | Provides ≥50 mV hysteresis (0.05×VCC) to reject noise on shared PCB traces in noisy automotive or industrial environments. |
| Output Slope Control | Actively limits dV/dt on SCIO to suppress ground bounce during fast transitions - prevents false logic levels in multi-drop bus configurations. |
| Page Write Buffer (16 bytes) | Enables burst writes within a 16-byte physical page boundary, reducing total write time vs. individual byte writes by up to 94%. |
| Status Register Access | Allows real-time polling of WIP bit to avoid premature read attempts and WEL bit to verify write-enable state before issuing WRITE commands. |
Applications
| Smart Sensor Calibration Storage | Industrial PLC Configuration Memory |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients and linearization tables for analog sensor front-ends in HVAC or process control transmitters. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed during power-up initialization; SCIO timing synchronized to MCU's software UART bit-banging routine. Use Value: Enables field-replaceable sensor modules with unique calibration data retained across power cycles without battery backup. |
Use Scenario: Holding user-defined I/O mapping, alarm thresholds, and communication settings in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Configuration EEPROM interfaced to ARM Cortex-M3 host via GPIO bit-banged UNI/O® driver; tolerates 100 kHz bus rate under EMI stress. Use Value: Supports zero-downtime firmware updates by decoupling configuration storage from flash memory, preventing corruption during power loss. |
| Medical Device Usage Logs | Automotive Body Control Module Settings |
Use Scenario: Recording cumulative operational hours, error counters, and last-known fault codes in portable diagnostic equipment compliant with IEC 62304. IC Role / Device Role / Timing Role: Low-power data logger using standby current ≤1 µA; write operations triggered by watchdog timeout or explicit save command. Use Value: Meets Class C safety requirements for persistent event logging without compromising battery life in handheld devices. |
Use Scenario: Storing seat position memory, mirror fold/unfold preferences, and lighting profiles in 12V automotive body control units. IC Role / Device Role / Timing Role: Industrial-temp rated EEPROM (I-temp) interfaced to 5V CAN microcontroller; withstands load dump transients via integrated ESD protection. Use Value: Ensures user settings survive vehicle battery disconnect and cold-cranking voltage dips down to 2.5V. |
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/SN | Supports 1.8–5.5V VCC range; identical density, page size, and UNI/O® protocol; same SOIC-8 package. | Required where system operates below 2.5V (e.g., coin-cell powered IoT sensors); not suitable for pure 5V-only designs due to lower VCC min. | Select 11AA040-I/SN only if 1.8V operation is mandatory; otherwise 11LC040-I/SN offers tighter VCC tolerance in 3.3V/5V systems. |
| 25LC040A-I/SN | SPI interface (4-wire), 4 Kbit density, same SOIC-8 package; lacks UNI/O®; requires separate CS, SCK, SI, SO pins. | Used when existing MCU design already implements SPI peripherals; incompatible with UNI/O®-only firmware stacks. | Choose 25LC040A-I/SN only when pin count and firmware overhead allow dedicated SPI resource allocation; not drop-in replaceable. |
Compared with 11AA040-I/SN, the 11LC040-I/SN trades 1.8V compatibility for enhanced noise immunity in higher-VCC industrial environments; versus 25LC040A-I/SN, it reduces GPIO count by 3 but requires UNI/O®-specific driver implementation.
Availability
11LC040-I/SN is available at Aetrix Electronics and suitable for smart sensor calibration storage, industrial PLC configuration memory, medical device usage logs, and automotive body control module settings requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 11LC040-I/SN 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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and memory products, with emphasis on embedded control and reliability-critical applications.
The 11LC040-I/SN belongs to Microchip's 11XX UNI/O® Serial EEPROM family, designed specifically for ultra-low-pin-count systems where minimizing MCU GPIO usage and board space is essential without sacrificing endurance or data retention.
FAQ
What is the minimum VCC voltage required for reliable operation of the 11LC040-I/SN?
The 11LC040-I/SN requires a minimum VCC of 2.5V for guaranteed operation across its full industrial temperature range (-40°C to +85°C). Operation below 2.5V is not specified and may result in undefined behavior, including failed write cycles or incorrect STATUS register reads. This distinguishes it from the 11AA040-I/SN, which supports down to 1.8V.
Does the 11LC040-I/SN support true multi-drop UNI/O® bus configurations?
Yes, the 11LC040-I/SN supports multi-drop UNI/O® buses with up to 16 devices sharing a single SCIO line, enabled by hardwired 4-bit device codes ('0000' for 11LC040-I/SN). Each device responds only to its unique 8-bit address (0xA0), allowing independent addressing without external multiplexing hardware.
How does the 11LC040-I/SN handle write protection during power transitions?
The 11LC040-I/SN incorporates built-in power-on/off data protection circuitry that automatically disables writes during VCC ramp-up and ramp-down. The write enable latch resets on power-up, and block protection bits (BP0/BP1) retain their nonvolatile state, ensuring memory remains write-protected even after brownout or cold start sequences.
Can the 11LC040-I/SN be used in automotive applications requiring AEC-Q200 qualification?
No, the 11LC040-I/SN carries an industrial temperature rating (-40°C to +85°C) and is not AEC-Q200 qualified. For automotive applications, Microchip offers the 11LC040-E/SN variant (E-temp, -40°C to +125°C) with automotive-grade screening and qualification - the 'I' suffix explicitly denotes industrial grade only.
What is the maximum allowed capacitive load on the SCIO line for reliable 100 kHz operation of the 11LC040-I/SN?
The 11LC040-I/SN specifies AC test conditions with CL = 100 pF. Reliable 100 kHz operation is guaranteed up to 100 pF total bus capacitance, including PCB trace, connector, and other device inputs. Exceeding this value increases rise/fall times beyond specification (TR/TF ≤100 ns), risking Manchester decoding errors and NoSAK responses.
11LC040-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SOIC
11LC040-I/SN FAQ
1.How can I place an order for 11LC040-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 11LC040-I/SN 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/SN reliable?
The price and inventory of 11LC040-I/SN 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/SN is usually 5 days.
3.What payment methods are accepted for 11LC040-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 11LC040-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 11LC040-I/SN?
11LC040-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 11LC040-I/SN 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/SN?
For technical support, including 11LC040-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 11LC040-I/SN requirements.
6.How does Aetrix verify that 11LC040-I/SN is sourced from the original manufacturer or authorized distributors?
All 11LC040-I/SN 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/SN meets industry standards.
7.What is the process for return or replacement of 11LC040-I/SN?
All 11LC040-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 11LC040-I/SN, 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/SN part is unused and in its original packaging.
Return procedure for 11LC040-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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