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Microchip Technology 11LC040-E/SN
- Part No.:
- 11LC040-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
11LC040-E/SN.pdf
- Description:
- IC EEPROM 4KBIT SGL WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,845
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Product details
Overview
11LC040-E/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 +125°C automotive temperature range. It features 16-byte page-write buffer, 1 µA max standby current, Schmitt-trigger SCIO input, and built-in write protection for use in automotive body control modules requiring reliable nonvolatile storage.
For engineers reviewing the 11LC040-E/SN datasheet, 11LC040-E/SN pinout, 11LC040-E/SN application, or 11LC040-E/SN equivalent, this page delivers verified electrical specs, UNI/O® timing constraints, package-specific terminal mapping, automotive-grade reliability data, and validated alternative parts for design-in and supply continuity.
Technical Context
The 11LC040-E/SN implements Manchester-encoded UNI/O® protocol over a single bidirectional SCIO line, eliminating need for separate clock and data lines. Its internal re-synchronization circuitry tolerates ±0.50% bus frequency drift per byte and ±0.06 UI edge jitter, enabling robust communication in electrically noisy automotive environments.
It integrates a status register with WIP and WEL bits, block write-protection (BP0/BP1) for 0%, 25%, 50%, or 100% array protection, and auto-erase during self-timed write cycles. The device uses slope-controlled output drivers to suppress ground bounce and Schmitt-trigger inputs for noise immunity on the SCIO line.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Density | 4 Kbit (512 × 8 organization) |
| VCC Range | 2.5V to 5.5V - supports direct connection to 3.3V or 5V automotive power rails without level shifting |
| Temp Range | -40°C to +125°C (Automotive E-temp) - qualified for under-hood and chassis-mounted applications |
| Write Cycle Time | Max 10 ms (page or byte) - enables deterministic firmware update latency in safety-critical systems |
| Endurance | 1,000,000 erase/write cycles - ensures >15 years of daily configuration updates in telematics ECUs |
| Data Retention | >200 years at 125°C - guarantees long-term calibration data integrity across vehicle lifetime |
| Bus Speed | 100 kbps max (equivalent to 100 kHz clock) - compatible with low-cost MCU GPIO bit-banging implementations |
Pinout & Package
11LC040-E/SN is packaged in 8-lead SOIC (SN), with lead-free, RoHS-compliant construction. Pin 1 is SCIO, Pin 2 is VSS, Pin 3 is VCC, and Pins 4–8 are No Connect (NC).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCIO | Serial Clock/Data I/O | Bidirectional Manchester-encoded UNI/O® bus line - carries clock and data in single stream; requires no external pull-up for master-driven start header |
| VSS | Ground | Reference return path for all internal logic and EEPROM programming voltage generation |
| VCC | Supply Voltage | Primary power input (2.5–5.5V); powers HV generator for EEPROM write/erase operations |
| NC (Pins 4–8) | No Connect | Internally unconnected; must remain floating or tied to VSS/VCC per PCB layout best practices - no functional impact if left unconnected |
Key Features
| Feature | Design Value |
|---|---|
| UNI/O® Single-I/O Interface | Reduces MCU pin count and PCB routing complexity vs. I²C/SPI - ideal for space-constrained automotive sensors |
| Page-Write Buffer (16 bytes) | Minimizes bus occupancy time during firmware parameter updates - cuts write transaction duration by up to 94% vs. byte-write |
| Schmitt Trigger Input (SCIO) | Provides ≥50 mV hysteresis (0.05×VCC) - rejects EMI-induced glitches in 12V battery-supplied systems |
| Output Slope Control | Controls dV/dt on SCIO to limit ground bounce - prevents false logic transitions during high-speed writes in shared-ground layouts |
| Block Write Protection | Hardware-configurable via STATUS register (BP0/BP1) - enables secure storage of calibration constants and VIN-locked settings |
Applications
| Automotive Body Control Unit (BCU) | Engine Control Module (ECM) Calibration Storage |
|---|---|
Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in a Class 2 BCU. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed during power-up and user adjustment events; UNI/O® timing accommodates slow 8-bit MCU GPIO polling. Use Value: 1 µA max standby current extends battery life during vehicle sleep mode; 125°C rating ensures operation near HVAC ducts. |
Use Scenario: Holding engine trim tables and OBD-II diagnostic fault codes in an ECM with limited PCB real estate. IC Role / Device Role / Timing Role: Secure, write-protected data vault - BP bits prevent accidental overwrite of calibrated fuel maps during service-mode reprogramming. Use Value: 1,000,000-cycle endurance supports repeated dealer-level recalibration; 200-year retention preserves factory settings across vehicle lifecycle. |
| Advanced Driver Assistance System (ADAS) Camera Module | Electric Power Steering (EPS) ECU |
Use Scenario: Saving lens focus offsets and thermal compensation coefficients in a rear-view camera module exposed to solar loading. IC Role / Device Role / Timing Role: High-reliability parameter store interfaced via MCU GPIO - UNI/O® eliminates need for dedicated I²C pins on image sensor SoC. Use Value: Schmitt-trigger SCIO and slope control maintain signal integrity amid ESD events from static discharge; 125°C rating survives under-dash mounting. |
Use Scenario: Storing torque sensor zero-point calibration and motor phase alignment data in an EPS controller subject to vibration and thermal cycling. IC Role / Device Role / Timing Role: Fail-safe configuration memory with hardware write protection - prevents corruption during CAN bus transients or power brownouts. Use Value: Built-in power-on/off write protection ensures EEPROM contents remain intact during ignition cycling; 4 kV ESD rating withstands assembly handling. |
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 | 1.8–5.5V VCC range; Industrial temp only (-40°C to +85°C); same 4K density and UNI/O® interface | Not qualified for automotive under-hood use; suitable for infotainment head units or gateway modules in cabin environment | Select when lower-voltage operation (1.8V) is required and automotive AEC-Q100 qualification is unnecessary |
| AT24C04D-SSHM-T | I²C interface (2-wire), 4K density, 1.7–5.5V, -40°C to +125°C, 1 MHz max clock - requires two dedicated MCU pins | Higher speed but greater pin count and layout complexity; lacks UNI/O®'s single-pin advantage in pin-starved MCUs | Choose when existing I²C infrastructure exists and higher throughput justifies additional routing and pull-up components |
Compared with 11LC040-E/SN, 11AA040-I/SN offers wider voltage flexibility but lacks automotive temperature qualification, while AT24C04D-SSHM-T provides faster I²C access at the cost of increased pin count and bus resource usage - making 11LC040-E/SN optimal for new automotive designs prioritizing pin efficiency and AEC-Q100 compliance.
Availability
11LC040-E/SN is available at Aetrix Electronics and suitable for automotive body control, engine management, ADAS camera calibration, and EPS ECU applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 11LC040-E/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 leading provider of microcontrollers, analog devices, and memory solutions, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.
The 11LCxxx family was designed specifically for automotive and industrial applications demanding ultra-low-power, single-pin serial memory with AEC-Q100 qualification, high reliability, and noise-immune communication in harsh electrical environments.
FAQ
What is the UNI/O® interface used by the 11LC040-E/SN?
The 11LC040-E/SN uses Microchip's patented UNI/O® bus, a single-wire, Manchester-encoded serial interface that combines clock and data into one bidirectional SCIO line. This eliminates the need for separate clock and data lines, reducing MCU pin count and PCB routing complexity - a key advantage in space-constrained automotive ECUs where GPIO resources are limited. The 11LC040-E/SN implements full UNI/O® protocol compliance including start header synchronization, MAK/NoMAK handshaking, and re-synchronization for frequency drift tolerance.
Does the 11LC040-E/SN support hardware write protection?
Yes, the 11LC040-E/SN includes hardware-based block write protection controlled by BP0 and BP1 bits in its STATUS register. These nonvolatile bits allow users to protect 0%, 25%, 50%, or 100% of the memory array from accidental writes. Protection is enforced at the silicon level - even if the write enable latch (WEL) is set, writes to protected blocks are ignored. This feature is critical for safeguarding calibration data and security-critical parameters in automotive applications, and it operates independently of software control in the 11LC040-E/SN.
What is the maximum write speed and endurance of the 11LC040-E/SN?
The 11LC040-E/SN supports a maximum serial bus frequency of 100 kHz (100 kbps), with typical page-write cycle time of 5 ms and maximum of 10 ms. 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 125°C - ensuring long-term integrity of stored parameters across the full automotive temperature range. These specifications are guaranteed for the 11LC040-E/SN under AEC-Q100 Grade 1 conditions.
Can the 11LC040-E/SN operate from a 3.3V supply in automotive applications?
Yes, the 11LC040-E/SN operates across a VCC range of 2.5V to 5.5V, making it fully compatible with standard 3.3V automotive power domains. Its DC characteristics - including VIH (0.7×VCC), VOL (≤0.4V), and ICC read current (≤1 mA at 2.5V) - are specified and tested across the full voltage and temperature range (-40°C to +125°C). This ensures reliable UNI/O® communication and EEPROM functionality in 3.3V-based body control modules and ADAS subsystems without level translation.
How does the 11LC040-E/SN handle power loss during a write operation?
The 11LC040-E/SN incorporates built-in power-loss protection: its write cycle is self-timed and atomic - once initiated (via NoMAK after data), the internal charge pump completes the erase-and-program sequence regardless of VCC fluctuations, provided minimum VCC remains above specification during Twc. Additionally, power-on/off write protection circuitry prevents partial writes during brownout or reset conditions. If VCC drops below operational threshold mid-cycle, the 11LC040-E/SN aborts the operation and retains pre-write data - no corruption occurs in the 11LC040-E/SN.
11LC040-E/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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
11LC040-E/SN FAQ
1.How can I place an order for 11LC040-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 11LC040-E/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-E/SN reliable?
The price and inventory of 11LC040-E/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-E/SN is usually 5 days.
3.What payment methods are accepted for 11LC040-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 11LC040-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 11LC040-E/SN?
11LC040-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 11LC040-E/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-E/SN?
For technical support, including 11LC040-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 11LC040-E/SN requirements.
6.How does Aetrix verify that 11LC040-E/SN is sourced from the original manufacturer or authorized distributors?
All 11LC040-E/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-E/SN meets industry standards.
7.What is the process for return or replacement of 11LC040-E/SN?
All 11LC040-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 11LC040-E/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-E/SN part is unused and in its original packaging.
Return procedure for 11LC040-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
11LC040-E/SN Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
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AT24C02C-SSHM-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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