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Microchip Technology 11LC161-I/P
- Part No.:
- 11LC161-I/P
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
11LC161-I/P.pdf
- Description:
- IC EEPROM 16KBIT SGL WIRE 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,629
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Product details
Overview
11LC161-I/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 +85°C. It delivers 1 mA typical active current, 1 µA max standby current, and supports 100 kbps bit rate with Manchester-encoded SCIO communication. Used for nonvolatile parameter storage in space-constrained embedded control systems.
For engineers reviewing the 11LC161-I/P datasheet, 11LC161-I/P pinout, 11LC161-I/P application, or 11LC161-I/P equivalent, key selection considerations include its 3-lead SOT-23 package compatibility, device address 0xA1, 16-byte page buffer, block write protection options, and industrial temperature rating - all critical for low-pin-count, low-power microcontroller peripheral storage.
Technical Context
The 11LC161-I/P implements a Manchester-encoded UNI/O® bus protocol using a single bidirectional SCIO line for clock and data multiplexing. Its internal architecture includes a 16-byte page-write buffer, STATUS register with WIP/WEL/BP bits, and Schmitt-triggered SCIO input with slope-controlled output to suppress ground bounce.
It operates as a slave-only device synchronized to master-generated timing, supporting re-synchronization on each MAK bit to tolerate ±0.50% frequency drift per byte and ±0.06 UI edge jitter. Write cycles are self-timed (max 10 ms), with built-in power-on/off write protection and endurance of 1 million erase/write cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Density | 16 Kbit (2,048 × 8 organization) |
| VCC Range | 2.5V to 5.5V - enables direct interface with 3.3V/5V logic without level shifting |
| Interface | Single I/O UNI/O® bus - reduces MCU pin count vs. SPI/I²C |
| Max Bit Rate | 100 kbps - equivalent to 100 kHz clock, suitable for low-speed control applications |
| Page Size | 16 bytes - defines maximum atomic write burst; crossing page boundary wraps within same physical page |
| Endurance | 1,000,000 erase/write cycles - supports frequent calibration or logging updates |
| Data Retention | >200 years - ensures long-term reliability in unpowered storage |
| Temp Range | -40°C to +85°C (Industrial) - qualified for industrial control and automotive cabin modules |
Pinout & Package
11LC161-I/P is supplied in an 8-lead PDIP package (suffix 'P'), with lead finish Pb-Free/RoHS compliant. Pin 1 = VSS (Ground), Pin 2 = NC (No Connect), Pin 3 = NC (No Connect), Pin 4 = SCIO (Serial Clock/Data I/O), Pin 5 = NC (No Connect), Pin 6 = NC (No Connect), Pin 7 = NC (No Connect), Pin 8 = VCC (Supply Voltage).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSS (Pin 1) | Ground reference | Primary return path for SCIO signal and internal circuitry; must be low-impedance |
| NC (Pins 2, 3, 5, 6, 7) | No-connect terminal | Internally unconnected; must remain floating or tied to VSS/VCC per PCB design rules |
| SCIO (Pin 4) | Serial clock/data bidirectional I/O | Manchester-encoded single-wire bus; requires external pull-up resistor (typically 4.7kΩ) |
| VCC (Pin 8) | Power supply input | Accepts 2.5–5.5V; decoupling capacitor (0.1 µF) required near pin |
Key Features
| Feature | Design Value |
|---|---|
| UNI/O® single I/O interface | Reduces MCU peripheral pin usage to one GPIO, eliminating need for dedicated SPI/I²C hardware |
| Schmitt-trigger SCIO input | Provides noise immunity against EMI and slow-rising signals in noisy industrial environments |
| Output slope control | Minimizes ground bounce and EMI during SCIO transitions, critical for mixed-signal PCB layouts |
| Status register (WIP/WEL/BP) | Enables real-time polling of write progress and configurable 0%, 25%, 50%, or 100% array protection |
| Auto-erase before write | Eliminates separate erase command; simplifies firmware by combining erase+write into single operation |
| 1 µA max standby current | Supports battery-backed or energy-harvesting systems requiring ultra-low quiescent power |
Applications
| Motor Control Tuning Storage | Smart Sensor Calibration Data |
|---|---|
Use Scenario: Storing motor PID coefficients and runtime calibration offsets in BLDC driver modules. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed during boot and updated after field tuning sessions. Use Value: Enables field-upgradable control algorithms without firmware reflashing; leverages 16-byte page writes for atomic coefficient updates. | Use Scenario: Retaining factory-trimmed sensor offset/gain values and temperature compensation tables in environmental sensors. IC Role / Device Role / Timing Role: Read-on-power-up configuration memory with infrequent write cycles during calibration. Use Value: Guarantees >200-year data retention and 1M-cycle endurance for lifetime calibration integrity. |
| Industrial HMI Button Mapping | Medical Device Configuration |
Use Scenario: Saving user-defined button assignments and display language preferences in panel-mounted HMIs. IC Role / Device Role / Timing Role: Low-pin-count configuration store interfaced to 8-bit microcontrollers with limited GPIO. Use Value: Single SCIO pin eliminates need for SPI/I²C peripherals, reducing BOM cost and layout complexity. | Use Scenario: Securing regulatory-compliant device settings (e.g., alarm thresholds, dose limits) in portable diagnostic equipment. IC Role / Device Role / Timing Role: Tamper-resistant configuration vault with block write protection enabled. Use Value: BP0/BP1 bits allow hardware-level locking of critical parameters against accidental overwrite. |
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 | Same density and pinout, but supports 1.8–5.5V VCC range and I-temp only (no automotive E-temp option) | Better suited for ultra-low-voltage systems (e.g., coin-cell powered devices); lacks -40°C to +125°C qualification | Select 11AA161-I/P when VCC may drop below 2.5V; otherwise 11LC161-I/P offers broader voltage margin at same price point |
| 24LC16B-I/P | I²C interface (2-wire), 16 Kbit, 2.5–5.5V, SOIC-8 package; no UNI/O® bus or SCIO pin | Requires two MCU pins (SCL/SDA); supports multi-master arbitration and higher 400 kHz speed | Choose 24LC16B-I/P if existing design uses I²C infrastructure; 11LC161-I/P preferred for pin-constrained or noise-sensitive single-wire deployments |
Compared with 11AA161-I/P, the 11LC161-I/P provides identical functionality with extended high-voltage tolerance (up to 5.5V), while versus 24LC16B-I/P it trades I²C flexibility for reduced pin count and enhanced noise immunity via Manchester encoding - making it optimal for cost-sensitive, space-limited industrial controls.
Availability
11LC161-I/P is available at Aetrix Electronics and suitable for industrial motor drives, smart sensor nodes, medical diagnostics, and HMI systems requiring stable component supply over extended production lifecycles.
Supply support for 11LC161-I/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 company specializing in microcontrollers, analog devices, and memory solutions for embedded systems.
The 11LC161-I/P belongs to Microchip's UNI/O® Serial EEPROM family, designed specifically for ultra-low-pin-count, low-power nonvolatile storage in resource-constrained microcontroller applications where SPI or I²C interfaces are unavailable or undesirable.
FAQ
What is the device address of the 11LC161-I/P on the UNI/O® bus?
The 11LC161-I/P has a fixed device address of 0xA1 (hex), determined by its 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 using a single SCIO line.
Does the 11LC161-I/P require external components for basic operation?
Yes, the 11LC161-I/P requires an external pull-up resistor (typically 4.7 kΩ) on the SCIO pin to ensure proper logic levels and bus timing. A 0.1 µF ceramic decoupling capacitor is also mandatory between VCC and VSS, placed as close as possible to the device pins to stabilize supply during write cycles.
How does write protection work on the 11LC161-I/P?
The 11LC161-I/P implements block write protection via BP0 and BP1 bits in its STATUS register, configurable through the WRSR command. These bits enable protection of none, 1/4, 1/2, or the entire memory array - providing hardware-enforced write security without firmware intervention.
Can the 11LC161-I/P operate at 1.8V?
No, the 11LC161-I/P is specified for 2.5V to 5.5V operation only. For 1.8V compatibility, Microchip offers the pin-compatible 11AA161-I/P variant, which shares identical density, page size, and UNI/O® protocol but extends VCC down to 1.8V.
What is the maximum write cycle time for the 11LC161-I/P?
The 11LC161-I/P specifies a maximum write cycle time of 10 ms for both byte and page writes (TWC). This includes auto-erase and programming; the STATUS register WIP bit must be polled to confirm completion before initiating subsequent operations.
11LC161-I/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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
11LC161-I/P FAQ
1.How can I place an order for 11LC161-I/P through Aetrix?
Please submit a Request for Quotation (RFQ) for 11LC161-I/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-I/P reliable?
The price and inventory of 11LC161-I/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-I/P is usually 5 days.
3.What payment methods are accepted for 11LC161-I/P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 11LC161-I/P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 11LC161-I/P?
11LC161-I/P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 11LC161-I/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-I/P?
For technical support, including 11LC161-I/P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 11LC161-I/P requirements.
6.How does Aetrix verify that 11LC161-I/P is sourced from the original manufacturer or authorized distributors?
All 11LC161-I/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-I/P meets industry standards.
7.What is the process for return or replacement of 11LC161-I/P?
All 11LC161-I/P units undergo pre-shipment inspection (PSI). If there is an issue with 11LC161-I/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-I/P part is unused and in its original packaging.
Return procedure for 11LC161-I/P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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