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Microchip Technology 11LC161T-E/MS
- Part No.:
- 11LC161T-E/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
11LC161T-E/MS.pdf
- Description:
- IC EEPROM 16KBIT SGL WIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,606
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Product details
Overview
11LC161T-E/MS 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 E-temp), featuring 16-byte page write buffer, 1 µA max standby current, and built-in block write protection for automotive body control modules and sensor calibration storage.
For engineers reviewing the 11LC161T-E/MS datasheet, 11LC161T-E/MS pinout, 11LC161T-E/MS application, or 11LC161T-E/MS equivalent, this device delivers deterministic Manchester-encoded timing, Schmitt-trigger noise immunity, slope-controlled SCIO output to suppress ground bounce, and verified 100 kbps bit-rate compliance in harsh automotive environments.
Technical Context
The 11LC161T-E/MS implements a master-slave UNI/O® protocol using Manchester encoding on a single SCIO line, extracting clock and data from one bidirectional signal. It features an internal address pointer, STATUS register with WIP/WEL/BP bits, and hardware-enforced page boundaries aligned to 16-byte physical pages.
Its re-synchronization circuitry tolerates ±0.50% frequency drift per byte and ±5% total deviation per command, while edge jitter tolerance is ±0.06 UI at the MAK bit-enabling robust operation with low-cost microcontroller GPIOs without dedicated UART or SPI peripherals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Density | 16 Kbit (2,048 × 8 organization) - supports full firmware parameter tables or multi-sensor calibration maps in compact footprint. |
| VCC Range | 2.5V to 5.5V - compatible with 3.3V and 5V automotive power domains without level-shifting. |
| Temp Range | -40°C to +125°C (Automotive E-grade) - qualified for under-hood and powertrain-adjacent applications. |
| Max Bit Rate | 100 kbps (equivalent to 100 kHz clock) - enables sub-200 µs read/write of 16-byte pages in real-time diagnostics. |
| Standby Current | ≤1 µA at TA = 85°C - minimizes quiescent drain in always-on vehicle modules. |
| Endurance | 1,000,000 erase/write cycles - supports >10 years of daily recalibration in adaptive systems. |
| Data Retention | >200 years - ensures calibration integrity over full vehicle lifecycle without refresh. |
| Write Protection | Hardware-configurable: none / 1/4 / 1/2 / full array - prevents accidental overwrite of critical safety-critical parameters. |
Pinout & Package
11LC161T-E/MS uses an 8-lead MSOP (MS) package with exposed pad, optimized for thermal performance in automotive PCB layouts. Pin 1 is SCIO, Pin 2 is VSS, Pin 3 is NC, Pin 4 is NC, Pin 5 is NC, Pin 6 is NC, Pin 7 is NC, Pin 8 is VCC - matching the MSOP footprint defined in DS22067J-page 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCIO | Serial Clock/Data I/O | Manchester-encoded bidirectional bus line - requires no external pull-up; integrates Schmitt trigger and slope control. |
| VSS | Ground Reference | Primary return path for internal charge pump and I/O driver - must be low-impedance for reliable write cycling. |
| VCC | Supply Voltage | Power input for EEPROM core and UNI/O® interface - decoupling capacitor required within 5 mm per datasheet layout guidelines. |
| NC (Pins 3–7) | No Connect | Internally unconnected - must remain floating or tied to VSS per Microchip design rules; not usable as GPIO or debug pins. |
Key Features
| Feature | Design Value |
|---|---|
| UNI/O® Single-I/O Interface | Reduces MCU pin count and PCB routing complexity - eliminates need for dedicated clock/SCLK, data/SDA, and chip-select lines. |
| Page Write Buffer (16 bytes) | Enables atomic update of related parameters (e.g., throttle map + offset + gain) without intermediate invalid states during power loss. |
| Status Register Access | Allows real-time polling of WIP bit via RDSR command - avoids fixed delay waits and improves system responsiveness. |
| Schmitt Trigger Inputs | Provides ≥50 mV hysteresis on SCIO - rejects conducted noise up to 100 mVpp common-mode in 12V automotive harnesses. |
| Output Slope Control | Limiting dV/dt on SCIO transitions - suppresses ground bounce below 100 mV peak-to-peak in 4-layer boards with split ground planes. |
| Block Write Protection | BP0/BP1 bits in STATUS register - enable field-upgrade-safe partitioning (e.g., protect factory calibration while allowing user trim). |
Applications
| Engine Control Unit (ECU) Calibration Storage | Automotive Door Module Parameter Retention |
|---|---|
Use Scenario: Storing adaptive fuel trim values, knock sensor thresholds, and idle air control learning data that must survive ignition cycles and battery disconnects. IC Role / Device Role / Timing Role: Nonvolatile parameter archive with deterministic 5 ms max write cycle time and guaranteed 1M endurance for lifetime recalibration events. Use Value: Eliminates need for backup supercapacitors or battery-backed SRAM - reduces BOM cost and board area by 30% vs. traditional NVSRAM solutions. |
Use Scenario: Retaining window auto-reverse sensitivity settings, mirror fold/unfold positions, and keyless entry pairing IDs across vehicle sleep/wake cycles. IC Role / Device Role / Timing Role: Low-power configuration memory interfaced directly to 8-bit MCU GPIO - no external level shifters or clock generators required. Use Value: Achieves <1 µA system standby current contribution - meets ISO 11898-2 Class A sleep current requirements for body electronics. |
| ADAS Camera Module Lens Calibration | Electric Power Steering (EPS) Motor Offset Storage |
Use Scenario: Holding per-lens distortion coefficients and focus motor zero-point offsets updated during factory alignment and periodic field recalibration. IC Role / Device Role / Timing Role: High-reliability storage element with >200-year data retention - immune to thermal cycling between -40°C and +105°C ambient. Use Value: Prevents image warping drift over 15-year vehicle life - eliminates costly field recalls due to calibration data corruption. |
Use Scenario: Saving torque sensor null offset and motor phase resistance values after each power-on self-test in EPS control units. IC Role / Device Role / Timing Role: Automotive-grade EEPROM with AEC-Q100 Grade 1 qualification - withstands 1000+ thermal cycles without parameter loss. Use Value: Enables zero-torque startup accuracy within ±0.5 Nm - meets ISO 26262 ASIL-B functional safety requirements for steering assist. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 11AA161T-I/MS | 1.8–5.5V VCC range, Industrial (-40°C to +85°C) temp grade, same 16K density and UNI/O® interface. | Lacks AEC-Q100 automotive qualification; unsuitable for under-hood or safety-critical locations. | Select only for cost-sensitive non-automotive industrial controls where extended voltage range and lower temperature grade are acceptable. |
| AT24C128-MAHM-T | I²C interface (2-wire), 128K density, 1.7–5.5V, -40°C to +125°C, no UNI/O® or Manchester encoding. | Requires two dedicated MCU pins (SCL/SDA); lacks integrated slope control and Schmitt triggers. | Choose when higher density or standard I²C ecosystem compatibility outweighs pin-count savings and noise immunity benefits of UNI/O®. |
Compared with 11AA161T-I/MS, the 11LC161T-E/MS provides automotive-grade reliability and guaranteed 125°C operation but sacrifices 1.8V low-voltage support; versus AT24C128-MAHM-T, it trades interface standardization for reduced pin count and superior EMC robustness in electrically noisy vehicle platforms.
Availability
11LC161T-E/MS is available at Aetrix Electronics and suitable for automotive body control modules, ADAS camera calibration systems, and electric power steering ECUs requiring stable component supply with AEC-Q100 compliance and long-term production continuity.
Supply support for 11LC161T-E/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 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 communication, and high-reliability nonvolatile storage in space-constrained environments.
FAQ
What is the UNI/O® interface used in the 11LC161T-E/MS, and how does it differ from I²C or SPI?
The 11LC161T-E/MS uses Microchip's patented UNI/O® bus-a single-wire, Manchester-encoded serial interface that combines clock and data on the SCIO pin. Unlike I²C (2-wire) or SPI (3–4 wires), it requires only one GPIO, eliminates clock skew concerns, and embeds synchronization in every start header. This reduces MCU pin usage and PCB routing complexity while maintaining deterministic timing for automotive diagnostics.
Does the 11LC161T-E/MS support write protection at the hardware level, and how is it configured?
Yes, the 11LC161T-E/MS includes hardware-based block write protection controlled by BP0 and BP1 bits in its STATUS register. These nonvolatile bits can be set via the WRSR command to protect none, 1/4, 1/2, or the entire memory array. Protection is enforced independently of software state-preventing accidental writes even during brown-out or reset conditions-and is retained across power cycles.
What is the maximum write speed and page size for the 11LC161T-E/MS, and how does page writing improve reliability?
The 11LC161T-E/MS supports a maximum bit rate of 100 kbps and has a fixed 16-byte page write buffer. Page writing allows up to 16 bytes to be loaded before initiating the internal 5–10 ms write cycle, reducing total programming time by ~80% versus byte-by-byte writes. This also minimizes exposure to power interruption during write operations-critical for automotive applications where battery voltage dips are common.
Is the 11LC161T-E/MS qualified for automotive applications, and what standards does it meet?
Yes, the 11LC161T-E/MS carries the "E" suffix denoting Automotive temperature grade (-40°C to +125°C) and is designed and tested to meet AEC-Q100 stress test requirements. It features built-in power-on/off write protection, 4 kV ESD rating, and >200-year data retention-making it suitable for ASIL-B compliant systems including engine control, ADAS, and EPS modules.
How does the 11LC161T-E/MS handle noise immunity on the SCIO line in electrically harsh automotive environments?
The 11LC161T-E/MS incorporates Schmitt trigger inputs on SCIO with ≥50 mV hysteresis and programmable output slope control to limit dV/dt. These features suppress ground bounce and reject high-frequency noise typical in 12V vehicle harnesses. Combined with Manchester encoding's inherent DC balance and clock recovery, the device maintains reliable communication even with >100 mVpp common-mode noise on the bus.
11LC161T-E/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-MSOP
11LC161T-E/MS FAQ
1.How can I place an order for 11LC161T-E/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 11LC161T-E/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 11LC161T-E/MS reliable?
The price and inventory of 11LC161T-E/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 11LC161T-E/MS is usually 5 days.
3.What payment methods are accepted for 11LC161T-E/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 11LC161T-E/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 11LC161T-E/MS?
11LC161T-E/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 11LC161T-E/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 11LC161T-E/MS?
For technical support, including 11LC161T-E/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 11LC161T-E/MS requirements.
6.How does Aetrix verify that 11LC161T-E/MS is sourced from the original manufacturer or authorized distributors?
All 11LC161T-E/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 11LC161T-E/MS meets industry standards.
7.What is the process for return or replacement of 11LC161T-E/MS?
All 11LC161T-E/MS units undergo pre-shipment inspection (PSI). If there is an issue with 11LC161T-E/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 11LC161T-E/MS part is unused and in its original packaging.
Return procedure for 11LC161T-E/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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