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Microchip Technology 11LC161-I/SN
- Part No.:
- 11LC161-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
11LC161-I/SN.pdf
- Description:
- IC EEPROM 16KBIT SGL WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,492
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Product details
Overview
11LC161-I/SN 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 over -40°C to +85°C. It features 16-byte page-write buffer, Schmitt-trigger SCIO input, output slope control, and built-in write protection including power-on/off circuitry and STATUS register control. Used in embedded system configuration storage where minimal pin count and low standby current are critical.
For engineers reviewing the 11LC161-I/SN datasheet, 11LC161-I/SN pinout, 11LC161-I/SN application, or 11LC161-I/SN equivalent, key selection considerations include its 100 kbps UNI/O® bit rate, 1 µA max standby current (I-temp), 16-byte page buffer, block write protection options (none/1/4/1/2/all), and 3-lead SOT-23 package compatibility with space-constrained PCB layouts.
Technical Context
The 11LC161-I/SN implements Manchester-encoded UNI/O® protocol on a single SCIO line, eliminating separate clock and data lines. Its internal timing recovery synchronizes to master clock period during each start header, tolerating ±0.50% frequency drift per byte and ±0.06 UI edge jitter.
It uses an 8-bit instruction register and supports command set including READ (0x03), WRITE (0x6C), WREN (0x96), RDSR (0x05), and WRSR (0x6E). The STATUS register provides real-time WIP and WEL status plus nonvolatile BP0/BP1 bits for 1/4, 1/2, or full array protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Density | 16 Kbit (2,048 × 8 organization) - supports firmware parameter tables or calibration data storage |
| VCC Range | 2.5V to 5.5V - compatible with standard 3.3V and 5V logic domains without level shifting |
| Standby Current | ≤1 µA at TA = 85°C - enables battery-backed retention in always-on subsystems |
| Page Size | 16 bytes - allows efficient burst writes without crossing physical page boundaries (0x00–0x0F, 0x10–0x1F, etc.) |
| Write Endurance | 1,000,000 cycles - supports frequent field-updatable configuration logging |
| Data Retention | >200 years - ensures long-term reliability in industrial deployments |
| Bus Speed | 100 kbps max (100 kHz equivalent) - delivers ~12.5 KB/s effective throughput with overhead |
| ESD Protection | >4,000 V HBM - withstands handling and board-level ESD events without external protection |
Pinout & Package
11LC161-I/SN is packaged in 3-lead SOT-23 (SN suffix), with SCIO serving as bidirectional serial clock/data line, VSS as ground reference, and VCC as supply voltage. No NC pins present in this variant.
| 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 return path for internal charge pump and logic - must be low-impedance for reliable erase/write |
| VCC | Supply Voltage | Power input for EEPROM array and UNI/O® interface - supports brown-out detection via internal POR/BOR |
Key Features
| Feature | Design Value |
|---|---|
| Single I/O UNI/O® Interface | Reduces MCU GPIO usage to one pin while maintaining full read/write access and STATUS monitoring |
| Self-Timed Write Cycle | Eliminates need for external timeout management - internal TWC completes in ≤10 ms (byte/page) |
| Block Write Protection | Hardware-enforced protection of 0%, 25%, 50%, or 100% of memory via BP0/BP1 bits in STATUS register |
| Output Slope Control | Prevents ground bounce on shared VSS traces by limiting dI/dt on SCIO transitions |
| Power-On/Off Write Protection | Automatic latch reset during VCC ramp prevents corruption during supply instability or brownout |
| 16-Byte Page Buffer | Enables atomic multi-byte writes within same physical page - avoids partial-page corruption on interruption |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients and temperature compensation tables for analog sensor front-ends. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed during power-up initialization and runtime correction lookups. Use Value: 2,048 × 8 capacity holds >100 sensor channels' calibration data; 1 µA standby current extends battery life in portable diagnostics units. | Use Scenario: Retaining user preferences, alarm thresholds, and device identity (serial number, calibration date) across power cycles. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter vault with hardware write protection preventing accidental overwrite. Use Value: Block protection (BP0/BP1) isolates critical identity fields from routine configuration updates; >200-year data retention meets FDA long-term recordkeeping requirements. |
| Automotive Body Control Module | Smart Home Actuator Tuning |
Use Scenario: Saving seat/mirror position presets, lighting profiles, and door lock behavior settings in ECU subsystems. IC Role / Device Role / Timing Role: I²C-alternative serial NV memory interfaced to 8-bit microcontrollers with limited GPIO resources. Use Value: -40°C to +125°C automotive temp grade (E-temp option available) ensures operation under hood conditions; 100 kbps bus speed supports rapid recall of 16-position memory banks. | Use Scenario: Storing motor tuning parameters (PID gains, acceleration ramps) and end-stop calibration values for connected blinds/motors. IC Role / Device Role / Timing Role: Field-updatable parameter repository accessible via low-pin-count MCU GPIO during commissioning or OTA updates. Use Value: Page-write buffer enables atomic storage of multi-parameter sets; Schmitt-trigger SCIO rejects noise in residential wiring environments. |
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 | 1.8V–5.5V VCC range vs. 2.5V–5.5V; identical density, page size, and UNI/O® interface | Supports ultra-low-voltage systems (e.g., coin-cell powered IoT nodes) where 11LC161-I/SN cannot operate below 2.5V | Select 11AA161-I/SN only if sub-2.5V operation is required; otherwise 11LC161-I/SN offers tighter VCC tolerance in 3.3V/5V systems |
| 24LC16B-I/SN | I²C interface (2-wire), 16 Kbit, 3.3V/5V compatible; no UNI/O® or Manchester encoding | Requires two dedicated pins (SCL/SDA); lacks slope control and integrated noise suppression features | Choose 24LC16B-I/SN when existing I²C infrastructure exists and GPIO conservation is less critical than protocol familiarity |
Compared with 11AA161-I/SN, the 11LC161-I/SN trades lower-voltage operation for improved noise immunity and tighter VCC regulation margin; versus 24LC16B-I/SN, it reduces pin count by 50% but requires UNI/O®-capable firmware stack support.
Availability
11LC161-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive body control modules requiring stable component supply and long-term lifecycle assurance.
Supply support for 11LC161-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 company specializing in microcontrollers, analog devices, and memory products for embedded control applications.
The 11LC161-I/SN belongs to Microchip's UNI/O® Serial EEPROM family, designed specifically for space-constrained, low-pin-count systems needing reliable nonvolatile storage without sacrificing electrical robustness or ease of integration.
FAQ
What is the maximum operating frequency of the 11LC161-I/SN UNI/O® bus?
The 11LC161-I/SN supports a maximum serial bus frequency of 100 kHz, corresponding to a 100 kbps bit rate. This is specified under AC characteristics with FBUS = 10–100 kHz and TE (bit period) of 10–100 µs. Operation above 100 kHz violates timing specifications and may cause communication failure or data corruption.
Does the 11LC161-I/SN require an external pull-up resistor on the SCIO line?
No, the 11LC161-I/SN does not require an external pull-up resistor on the SCIO line. Its internal circuitry includes active drive capability and integrated Schmitt-trigger input with hysteresis (VHYS ≥ 0.05×VCC), enabling reliable signal integrity without external components - a key advantage over open-drain I²C implementations.
How is write protection configured on the 11LC161-I/SN?
Write protection on the 11LC161-I/SN is configured via the STATUS register's BP0 and BP1 bits, set using the WRSR (0x6E) command. These nonvolatile bits enable hardware protection of none, 1/4, 1/2, or all of the memory array. Protection takes effect immediately after WRSR completion and persists through power cycles.
What is the purpose of the "standby pulse" in 11LC161-I/SN communication?
The standby pulse - holding SCIO high for ≥600 µs (TSTBY) - resets the 11LC161-I/SN and returns it to Standby mode. It is required after error conditions (e.g., NoSAK reception), between commands targeting different devices, or after invalid bus activity. It ensures deterministic state recovery before initiating new operations.
Can the 11LC161-I/SN be used in automotive applications?
Yes, the 11LC161-I/SN is qualified for Industrial (-40°C to +85°C) and Automotive (-40°C to +125°C) temperature ranges. Its E-temp variant (11LC161-E/SN) meets AEC-Q100 stress test requirements and is suitable for under-hood body control modules, infotainment backup storage, and ADAS subsystem configuration retention.
11LC161-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:
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
11LC161-I/SN FAQ
1.How can I place an order for 11LC161-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 11LC161-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 11LC161-I/SN reliable?
The price and inventory of 11LC161-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 11LC161-I/SN is usually 5 days.
3.What payment methods are accepted for 11LC161-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 11LC161-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 11LC161-I/SN?
11LC161-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 11LC161-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 11LC161-I/SN?
For technical support, including 11LC161-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 11LC161-I/SN requirements.
6.How does Aetrix verify that 11LC161-I/SN is sourced from the original manufacturer or authorized distributors?
All 11LC161-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 11LC161-I/SN meets industry standards.
7.What is the process for return or replacement of 11LC161-I/SN?
All 11LC161-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 11LC161-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 11LC161-I/SN part is unused and in its original packaging.
Return procedure for 11LC161-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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