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Microchip Technology 11LC161-E/P
- Part No.:
- 11LC161-E/P
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
11LC161-E/P.pdf
- Description:
- IC EEPROM 16KBIT SGL WIRE 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,547
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Product details
Overview
11LC161-E/P from Microchip Technology Inc. is a 16 Kbit (2,048 × 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, 100 kbps max bit rate, Schmitt-trigger SCIO input, and built-in write protection for automotive body control modules and engine management sensors.
For engineers reviewing the 11LC161-E/P datasheet, 11LC161-E/P pinout, 11LC161-E/P application, or 11LC161-E/P equivalent, key selection considerations include its automotive-grade temperature rating, UNI/O® protocol compatibility with PIC® MCUs, 1 µA standby current, and 1,000,000-cycle endurance - critical for infotainment storage and powertrain calibration data retention.
Technical Context
The 11LC161-E/P implements Manchester-encoded UNI/O® communication over a single bidirectional SCIO line, extracting clock and data from one signal stream. 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 block write protection (none/¼/½/all array), auto-erase during self-timed write cycles, and re-synchronization circuitry tolerant to ±0.5% frequency drift per byte and ±0.06 UI edge jitter - enabling robust operation in electrically noisy automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Density | 16 Kbit (2,048 × 8 organization) - supports firmware parameter tables and sensor calibration maps |
| VCC Range | 2.5V to 5.5V - compatible with 3.3V and 5V automotive microcontroller I/O domains |
| Temp Range | -40°C to +125°C (Automotive E-temp) - qualified for under-hood and transmission control applications |
| Max Bit Rate | 100 kbps - enables fast configuration loading without requiring high-speed MCU peripherals |
| Write Endurance | 1,000,000 erase/write cycles - ensures >15 years of daily recalibration in engine control units |
| Data Retention | >200 years at 25°C - guarantees long-term storage integrity of safety-critical calibration data |
| Standby Current | 1 µA max at 125°C - minimizes quiescent power in always-on vehicle subsystems |
| Page Size | 16 bytes - aligns with typical CAN message payload size for efficient over-the-air update handling |
Pinout & Package
11LC161-E/P is packaged in 8-lead PDIP (P package), with lead finish Pb-Free/RoHS compliant. Pin 1 is VSS (ground), Pin 4 is SCIO (bidirectional serial clock/data), Pin 5 is NC, Pin 8 is VCC (supply voltage).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSS (Pin 1) | Ground reference | Provides return path for SCIO signaling and internal charge pump; must be low-impedance for stable UNI/O® timing |
| VCC (Pin 8) | Supply voltage input | Power source for EEPROM core and UNI/O® interface logic; decoupling capacitor required per automotive EMC standards |
| SCIO (Pin 4) | Serial Clock/Data I/O | Single-wire Manchester-encoded bus - carries both clock and data; requires external pull-up resistor (typically 4.7kΩ) |
| NC (Pins 2,3,5,6,7) | No-connect | Internally unconnected; must remain floating or tied to VSS/VCC per PCB layout guidelines to avoid noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| UNI/O® Serial Interface | Reduces MCU pin count and PCB routing complexity by replacing SPI/I²C with single-wire bus - ideal for space-constrained automotive modules |
| Schmitt Trigger Inputs | Suppresses EMI-induced false triggering on SCIO line in high-noise engine bays, ensuring reliable command recognition |
| Output Slope Control | Minimizes ground bounce during SCIO transitions - prevents corruption of adjacent analog sensor signals in mixed-signal ECUs |
| Status Register Access | Enables real-time monitoring of Write-In-Progress (WIP) and Write Enable Latch (WEL) states without halting MCU execution |
| Block Write Protection | Allows selective locking of memory blocks (e.g., protect calibration constants while permitting runtime variable updates) |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Storing and updating fuel injection timing maps and knock sensor calibration coefficients during vehicle operation. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with guaranteed write integrity during ignition transients and battery voltage dips. Use Value: 1 µA standby current and 125°C operation ensure continuous availability of calibrated parameters even during extended hot-soak conditions. | Use Scenario: Retaining camera lens focus offsets and radar module compensation values across power cycles. IC Role / Device Role / Timing Role: Automotive-grade serial EEPROM providing secure, tamper-resistant storage for ADAS sensor calibration data. Use Value: 1,000,000-cycle endurance supports daily OTA updates over 15+ years of vehicle service life. |
| Body Control Module (BCM) | Electric Power Steering (EPS) |
Use Scenario: Saving user-configurable settings (window position, mirror angle, lighting profiles) in vehicles with personalized driver profiles. IC Role / Device Role / Timing Role: Low-power, single-I/O nonvolatile memory interfacing directly with 8-bit automotive MCUs via UNI/O®. Use Value: 2.5–5.5V VCC range accommodates wide battery voltage swings during cranking and alternator regulation. | Use Scenario: Storing torque sensor zero-point offsets and motor phase alignment data that must survive repeated power cycling and vibration. IC Role / Device Role / Timing Role: High-reliability EEPROM with built-in write protection preventing accidental overwrites during EPS controller boot sequences. Use Value: Block protection (BP0/BP1 bits) allows locking critical steering calibration while permitting runtime logging of fault events. |
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/P | 1.8–5.5V VCC range; Industrial (-40°C to +85°C) temp grade; same 16K density and UNI/O® interface | Not qualified for automotive under-hood use; suitable for cabin infotainment head units | Select only if system operates below 85°C and requires lower-voltage operation down to 1.8V |
| AT24C128C-SSHM-T | I²C interface (2-wire), 128K density, 1.7–5.5V, industrial temp; no UNI/O® or Schmitt trigger | Requires two MCU pins and external pull-ups; lacks automotive temperature rating and noise immunity features | Choose only when existing I²C infrastructure exists and UNI/O®'s single-pin advantage is unnecessary |
Compared with 11AA161-I/P, the 11LC161-E/P provides automotive temperature qualification and higher minimum supply voltage - essential for engine bay deployment. Versus AT24C128C-SSHM-T, it trades density and interface ubiquity for pin count reduction and EMI-hardened signaling in harsh environments.
Availability
11LC161-E/P is available at Aetrix Electronics and suitable for automotive body control, powertrain calibration, and ADAS sensor calibration applications requiring stable component supply across extended product lifecycles.
Supply support for 11LC161-E/P 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 markets.
The 11LC161-E/P belongs to Microchip's UNI/O® serial EEPROM family, designed specifically for automotive systems requiring minimal pin count, high noise immunity, and extended temperature reliability in space-constrained ECUs.
FAQ
What is the device address for 11LC161-E/P on the UNI/O® bus?
The 11LC161-E/P uses a hardwired device address of 0xA1, derived from the 4-bit family code '1010' and device code '0001'. This allows coexistence with 11XXXX0 devices (address 0xA0) on the same UNI/O® bus without conflict, enabling multi-device configurations in automotive modules.
Does 11LC161-E/P support page writes, and what is the maximum buffer size?
Yes, the 11LC161-E/P supports page writes with a 16-byte buffer. Up to 16 sequential bytes can be loaded into the buffer before initiating the self-timed write cycle. This reduces total programming time versus byte-wise writes and aligns with common CAN FD payload sizes for efficient firmware updates.
How does the STATUS register in 11LC161-E/P assist in write operation management?
The STATUS register in 11LC161-E/P provides real-time access to the Write-In-Progress (WIP) and Write Enable Latch (WEL) bits. Reading this register allows the host MCU to poll WIP status without blocking execution, enabling efficient background write handling while maintaining system responsiveness during critical automotive tasks.
What package type is used for 11LC161-E/P, and is it RoHS compliant?
The 11LC161-E/P is supplied in an 8-lead PDIP package (suffix 'P'), with Pb-Free and RoHS-compliant lead finish. This through-hole package supports legacy automotive manufacturing processes and provides mechanical robustness for high-vibration environments such as engine control units.
Can 11LC161-E/P operate reliably in electrically noisy automotive environments?
Yes, the 11LC161-E/P is engineered for automotive noise immunity: Schmitt-trigger inputs reject fast transients on SCIO, output slope control limits ground bounce, and re-synchronization circuitry tolerates ±0.5% bus frequency drift per byte - all validated for operation up to 125°C in E-temp grade.
11LC161-E/P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
11LC161-E/P FAQ
1.How can I place an order for 11LC161-E/P through Aetrix?
Please submit a Request for Quotation (RFQ) for 11LC161-E/P 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/P reliable?
The price and inventory of 11LC161-E/P 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/P is usually 5 days.
3.What payment methods are accepted for 11LC161-E/P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 11LC161-E/P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 11LC161-E/P?
11LC161-E/P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 11LC161-E/P 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/P?
For technical support, including 11LC161-E/P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 11LC161-E/P requirements.
6.How does Aetrix verify that 11LC161-E/P is sourced from the original manufacturer or authorized distributors?
All 11LC161-E/P 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/P meets industry standards.
7.What is the process for return or replacement of 11LC161-E/P?
All 11LC161-E/P units undergo pre-shipment inspection (PSI). If there is an issue with 11LC161-E/P, 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/P part is unused and in its original packaging.
Return procedure for 11LC161-E/P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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