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Microchip Technology 11LC161-E/SN
- Part No.:
- 11LC161-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
11LC161-E/SN.pdf
- Description:
- IC EEPROM 16KBIT SGL WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,068
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Product details
Overview
11LC161-E/SN from Microchip Technology Inc. is a 16 Kbit (2,048 × 8) serial EEPROM using the UNI/O® single-I/O bus interface. It operates from 2.5V to 5.5V, supports 100 kbps bit rate (100 kHz equivalent), features 16-byte page-write buffering, and delivers 1 µA max standby current at I-temp and E-temp ranges. It is used in automotive body control modules for storing calibration data and configuration parameters.
For engineers reviewing the 11LC161-E/SN datasheet, 11LC161-E/SN pinout, 11LC161-E/SN application, or 11LC161-E/SN equivalent, key selection criteria include its automotive-grade temperature range (–40°C to +125°C), device address 0xA1, SOT-23-3 package compatibility, and UNI/O® protocol timing tolerance for jitter and frequency drift in noisy vehicle environments.
Technical Context
The 11LC161-E/SN implements Manchester-encoded serial communication over a single SCIO line, extracting clock and data from one bidirectional signal. Its internal architecture includes a status register with WIP and WEL bits, 16-byte page latches, and re-synchronization circuitry tolerant to ±0.06 UI input edge jitter and ±0.50% per-byte frequency drift.
It uses on-chip high-voltage generation for EEPROM writes, supports block write protection (none/¼/½/all array), and enforces power-on/off data protection via built-in write-enable latch control. The device enters Standby mode after NoMAK/SAK termination and Idle mode upon invalid address or command detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Density | 16 Kbit (2,048 × 8 organization) - provides sufficient nonvolatile storage for firmware patch metadata or sensor calibration tables in compact automotive ECUs. |
| VCC Range | 2.5V to 5.5V - compatible with standard 3.3V and 5V automotive supply rails without level-shifting. |
| Bus Interface | UNI/O® single I/O (SCIO) - reduces PCB routing complexity and pin count versus I²C or SPI, ideal for space-constrained modules. |
| Max Bit Rate | 100 kbps (100 kHz equivalent) - enables fast parameter updates during diagnostics while maintaining robustness against EMI in vehicle harnesses. |
| Write Endurance | 1,000,000 erase/write cycles - supports frequent recalibration logging over full vehicle lifetime (15+ years). |
| Data Retention | >200 years - ensures long-term integrity of safety-critical configuration data without refresh mechanisms. |
| Temp Range | –40°C to +125°C (Automotive E-temp) - qualified for under-hood and transmission control unit deployment. |
| Standby Current | 1 µA max (at TA = 125°C) - minimizes quiescent power draw in always-on vehicle networks like LIN or CAN wake-up circuits. |
Pinout & Package
11LC161-E/SN is packaged in 3-lead SOT-23 (SN suffix), with pin 1 = SCIO, pin 2 = VSS, pin 3 = VCC. No NC pins are connected; all three terminals are functional and electrically defined per DS22067J.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCIO | Serial Clock/Data I/O | Single bidirectional line carrying Manchester-encoded clock+data; includes Schmitt trigger input and slope-controlled output to suppress ground bounce and noise. |
| VSS | Ground Reference | Primary return path for SCIO driver and internal logic; must be low-impedance to maintain timing integrity under transient load. |
| VCC | Supply Voltage | Power rail for EEPROM core and interface logic; decoupling capacitor required within 10 mm to meet AC timing specs at 100 kHz. |
Key Features
| Feature | Design Value |
|---|---|
| UNI/O® Protocol Compliance | Full support for Manchester encoding, start header sync, MAK/NoMAK/SAK/NoSAK handshake, and re-synchronization - eliminates need for external clock lines and simplifies microcontroller GPIO usage. |
| Page-Write Buffer | 16-byte buffer enables burst writes without host intervention between bytes - reduces total write time by up to 94% vs. byte-write mode for full-page updates. |
| Status Register Access | Real-time read of WIP (Write-In-Progress) and WEL (Write Enable Latch) bits via RDSR command - allows host to poll completion without fixed delays or interrupts. |
| Block Write Protection | Configurable BP0/BP1 bits protect 0%, 25%, 50%, or 100% of memory array - prevents accidental overwrite of critical boot parameters or VIN data during field updates. |
| Noise Immunity | Schmitt-trigger SCIO inputs with 0.05×VCC hysteresis and 50 ns spike suppression - rejects ESD transients and coupled noise common in 12V automotive systems. |
Applications
| Body Control Module (BCM) | Engine Control Unit (ECU) |
|---|---|
Use Scenario: Storing seat position presets, mirror fold/unfold settings, and door lock configuration across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with infrequent writes and high read reliability; accessed via UNI/O® during startup or user input events. Use Value: Eliminates need for larger SPI EEPROMs or external voltage supervisors - reduces BOM cost and board area in cost-sensitive BCM designs. |
Use Scenario: Holding fuel trim adaptation values and OBD-II diagnostic trouble code (DTC) history logs. IC Role / Device Role / Timing Role: Fail-safe data logger with guaranteed write completion detection via WIP bit polling; survives battery disconnect events. Use Value: Enables deterministic flash update sequencing in safety-critical engine software - meets ISO 26262 ASIL-B data integrity requirements without redundant storage. |
| Transmission Control Module (TCM) | Advanced Driver Assistance Systems (ADAS) |
Use Scenario: Recording gear shift learning profiles and torque converter clutch adaptation parameters over vehicle lifetime. IC Role / Device Role / Timing Role: High-endurance EEPROM interfaced directly to MCU GPIO; withstands >1M write cycles during dynamic calibration routines. Use Value: Supports continuous adaptive learning without wear leveling firmware - simplifies TCM software architecture and validation effort. |
Use Scenario: Storing camera lens calibration offsets and radar beam alignment coefficients during factory setup and service recalibration. IC Role / Device Role / Timing Role: Secure configuration storage with hardware write protection; accessed only during controlled service mode via diagnostic tool. Use Value: Prevents unauthorized modification of ADAS sensor parameters - satisfies UNECE R156 software update security requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 11AA161-I/SN | 1.8–5.5V VCC range; Industrial temp only (–40°C to +85°C); same 16K density, UNI/O®, and 0xA1 address. | Limited to cabin-mounted modules (e.g., infotainment, HVAC) not exposed to under-hood thermal stress. | Select 11AA161-I/SN only if system operates below 85°C ambient and requires lower-voltage operation down to 1.8V. |
| AT24C128C-SSHM-T | I²C interface (2-wire), 128Kbit density, 1.7–5.5V, –40°C to +125°C; no UNI/O® compatibility or page-buffered write acceleration. | Requires two dedicated MCU pins (SCL/SDA); supports higher density but lacks integrated write-protection granularity. | Choose AT24C128C-SSHM-T when existing I²C infrastructure exists and >16K storage is needed - but expect longer write times and no built-in block protection. |
Compared with 11LC161-E/SN, 11AA161-I/SN trades automotive temperature qualification for wider voltage flexibility, while AT24C128C-SSHM-T offers greater capacity at the cost of interface complexity and slower write throughput - making 11LC161-E/SN optimal for new UNI/O®-based automotive designs prioritizing pin efficiency and deterministic timing.
Availability
11LC161-E/SN is available at Aetrix Electronics and suitable for automotive body control modules, engine management systems, and transmission control units requiring stable component supply across extended temperature operation and long product lifecycles.
Supply support for 11LC161-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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and memory products for industrial, automotive, and consumer applications.
The 11LC161-E/SN belongs to Microchip's UNI/O® Serial EEPROM family, designed specifically for cost-sensitive, space-constrained automotive and industrial systems requiring minimal GPIO usage and robust noise immunity in harsh electrical environments.
FAQ
What is the device address of the 11LC161-E/SN?
The 11LC161-E/SN has a fixed 8-bit device address of 0xA1 (10100001b), where the family code '1010' is combined with device code '0001'. This allows coexistence with 11XXXX0 devices (address 0xA0) on the same UNI/O® bus without conflict - a key feature confirmed in DS22067J Section 3.4 and the Device Selection Table.
Does the 11LC161-E/SN support page writes, and what is the buffer size?
Yes, the 11LC161-E/SN supports page writes with a 16-byte buffer, enabling up to 16 sequential bytes to be loaded before initiating the internal write cycle. This is explicitly documented in the Features list and Section 4.3 of DS22067J, and reduces total programming time significantly compared to byte-write mode.
How does the 11LC161-E/SN handle power loss during a write operation?
The 11LC161-E/SN incorporates built-in power-loss protection: the write enable latch resets on power-up, and the device includes power-on/off data protection circuitry. If VCC drops below operating threshold mid-write, the incomplete write is aborted and no partial data is committed - ensuring EEPROM array integrity as specified in the Features section of DS22067J.
What package type does the 11LC161-E/SN use, and are there alternatives?
The 11LC161-E/SN uses the 3-lead SOT-23 package (suffix 'SN'), with pinout SCIO-VSS-VCC. Alternative packages for the same part number include PDIP (P), SOIC (SN), MSOP (MS), TDFN (MN), TO-92 (TO), and SOT-23 (TT), all listed in the Device Selection Table on DS22067J-page 2 - confirming SN as the standard surface-mount option.
Can the 11LC161-E/SN be used in systems requiring I²C or SPI interfaces?
No - the 11LC161-E/SN exclusively uses the UNI/O® single-I/O serial bus and is not electrically or protocol-compatible with I²C or SPI. It requires a GPIO pin configured for Manchester-encoded bitstream timing, as defined in DS22067J Sections 2.1 and 3.0. Interfacing with I²C/SPI systems would require a protocol translator or MCU firmware abstraction layer.
11LC161-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:
- 16Kbit
- Memory Organization:
- 2K 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
11LC161-E/SN FAQ
1.How can I place an order for 11LC161-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 11LC161-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 11LC161-E/SN reliable?
The price and inventory of 11LC161-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 11LC161-E/SN is usually 5 days.
3.What payment methods are accepted for 11LC161-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 11LC161-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 11LC161-E/SN?
11LC161-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 11LC161-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 11LC161-E/SN?
For technical support, including 11LC161-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 11LC161-E/SN requirements.
6.How does Aetrix verify that 11LC161-E/SN is sourced from the original manufacturer or authorized distributors?
All 11LC161-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 11LC161-E/SN meets industry standards.
7.What is the process for return or replacement of 11LC161-E/SN?
All 11LC161-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 11LC161-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 11LC161-E/SN part is unused and in its original packaging.
Return procedure for 11LC161-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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