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Microchip Technology 11LC161T-E/SN
- Part No.:
- 11LC161T-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
11LC161T-E/SN.pdf
- Description:
- IC EEPROM 16KBIT SGL WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,599
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Product details
Overview
11LC161T-E/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 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 engine management sensors.
For engineers reviewing the 11LC161T-E/SN datasheet, 11LC161T-E/SN pinout, 11LC161T-E/SN application, or 11LC161T-E/SN equivalent, key selection considerations include its Automotive-grade temperature range, fixed device address 0xA1, SOT-23-3 package compatibility, and UNI/O® protocol timing tolerance (±0.5% frequency drift per byte).
Technical Context
The 11LC161T-E/SN implements Manchester-encoded UNI/O® communication over a single SCIO line, extracting clock and data from one bidirectional signal. It uses internal re-synchronization circuitry that adjusts on every MAK bit to tolerate ±0.06 UI input edge jitter and ±0.5% bus frequency drift per byte.
Its architecture includes a status register with WIP and WEL bits, 16-byte page latches, and hardware-controlled block protection (BP0/BP1) enabling write protection of none, 1/4, 1/2, or all memory. The device enters Standby mode after NoMAK+SAK or a TSTBY ≥600 µs high pulse on SCIO.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Density | 16 Kbit (2,048 × 8 organization) |
| VCC Range | 2.5V to 5.5V - supports direct connection to 3.3V or 5V microcontroller I/O without level shifting |
| Temp Range | -40°C to +125°C - qualified for under-hood automotive applications |
| Page Size | 16 bytes - enables efficient firmware parameter updates without excessive write cycles |
| Write Cycle Time | ≤10 ms (page or byte) - defines minimum inter-write delay in time-critical logging systems |
| Endurance | 1,000,000 erase/write cycles - ensures >10-year reliability in cyclic data logging |
| Data Retention | >200 years at 25°C - guarantees nonvolatile storage integrity over product lifetime |
| Bus Frequency | 10–100 kHz - compatible with low-speed MCU GPIO bit-banging implementations |
Pinout & Package
11LC161T-E/SN is packaged in 3-lead SOT-23 (SN suffix), with SCIO as the sole bidirectional serial I/O, VCC for supply, and VSS for ground. No NC pins are present in this variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SCIO) | Serial Clock/Data I/O | Manchester-encoded bidirectional bus - carries clock and data; requires Schmitt-trigger input and slope control for noise immunity |
| 2 (VSS) | Ground Reference | Return path for all internal logic and output drivers; must be low-impedance to prevent ground bounce during write pulses |
| 3 (VCC) | Supply Voltage | Power source for EEPROM array, HV generator, and interface logic; decoupling capacitor required per datasheet layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| UNI/O® Single-I/O Interface | Reduces PCB routing complexity and MCU pin count - only one GPIO needed for full read/write/control |
| Schmitt Trigger Inputs | Suppresses noise on SCIO line in electrically noisy automotive environments (e.g., near ignition systems) |
| Output Slope Control | Minimizes ground bounce during fast transitions - critical for stable operation in shared-ground embedded systems |
| Status Register Access | Enables real-time monitoring of Write-In-Progress (WIP) and Write Enable Latch (WEL) states without halting host MCU execution |
| Block Write Protection | Hardware-configurable BP0/BP1 bits allow selective locking of memory regions - prevents accidental overwrite of calibration data or security keys |
| Auto-Erase & Self-Timed Write | Eliminates need for external timing control - simplifies firmware by removing wait-state polling or timer dependencies |
Applications
| Engine Control Unit (ECU) Calibration Storage | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Storing adaptive fuel trim values, idle air control parameters, and sensor offset corrections updated during vehicle operation. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed via UNI/O® bus during power-up and runtime recalibration sequences. Use Value: Automotive temperature rating (-40°C to +125°C) and 1M endurance ensure reliable retention across 15+ years of thermal cycling and frequent updates. | Use Scenario: Holding door lock/unlock state history, window position memory, and lighting configuration profiles. IC Role / Device Role / Timing Role: Serial EEPROM interfaced to 8-bit MCU GPIO using bit-banged UNI/O® protocol for cost-sensitive subsystems. Use Value: 16-byte page buffer enables atomic update of multi-byte settings; block protection prevents corruption of safety-critical lock logic. |
| Telematics Control Unit (TCU) Event Logging | Advanced Driver Assistance Systems (ADAS) Sensor Offset Storage |
Use Scenario: Recording GPS timestamped crash events, hard-braking incidents, and diagnostic trouble codes (DTCs) for fleet analytics. IC Role / Device Role / Timing Role: High-reliability data logger using sequential CRRD reads and page writes triggered by CAN message interrupts. Use Value: 200-year data retention and 1 µA standby current enable long-term event storage with minimal battery drain in always-on modules. | Use Scenario: Storing factory-calibrated offsets for radar or camera sensors, updated during end-of-line testing and field recalibration. IC Role / Device Role / Timing Role: Secure configuration store accessed only during initialization or authorized service mode via protected UNI/O® commands. Use Value: Hardware write protection (BP bits) and power-on data protection prevent unauthorized or accidental modification of critical ADAS calibration data. |
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/SN | 1.8–5.5V VCC range; Industrial temp (-40°C to +85°C); same 16K density, UNI/O®, and 0xA1 address | Not qualified for automotive under-hood use; suitable for consumer or industrial control panels | Select when lower voltage operation (1.8V) is required and automotive qualification is unnecessary |
| AT24C128C-SSHM-T | I²C interface (2-wire), 128K density, 1.7–5.5V, -40°C to +125°C, no UNI/O® support | Requires two dedicated MCU pins (SCL/SDA); higher capacity but incompatible protocol stack | Choose when existing I²C infrastructure exists and higher memory capacity justifies added pin count and protocol overhead |
Compared with 11LC161T-E/SN, the 11AA161T-I/SN offers wider voltage flexibility but lacks automotive qualification, while the AT24C128C-SSHM-T provides greater density and same temperature grade but mandates I²C hardware and doubles GPIO usage - making 11LC161T-E/SN optimal for space-constrained, pin-limited automotive subsystems requiring UNI/O® simplicity.
Availability
11LC161T-E/SN is available at Aetrix Electronics and suitable for automotive body electronics, engine management systems, and telematics modules requiring stable component supply with guaranteed automotive-grade traceability and extended lifecycle support.
Supply support for 11LC161T-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 company specializing in microcontrollers, analog devices, and memory solutions, with broad automotive AEC-Q100 qualification coverage and ISO/TS 16949 manufacturing compliance.
The 11LCxxx family was designed specifically for cost-sensitive, pin-constrained automotive and industrial applications requiring robust serial EEPROM functionality with minimal MCU resource usage - leveraging UNI/O® to eliminate dedicated clock lines and simplify board layout.
FAQ
What is the device address of the 11LC161T-E/SN?
The 11LC161T-E/SN has a fixed 8-bit device address of 0xA1 (10100001b), where the upper four bits (1010) are the UNI/O® family code and the lower four bits (0001) identify it as a "161" variant. This allows coexistence with 11LC160 (0xA0) on the same UNI/O® bus without address conflict.
Does the 11LC161T-E/SN support write protection of specific memory blocks?
Yes, the 11LC161T-E/SN includes a STATUS register with BP0 and BP1 bits that configure hardware block write protection. Setting these bits enables write protection of none, 1/4, 1/2, or the entire 2,048-byte memory array - preventing accidental overwrites of calibration data or firmware parameters stored in designated regions.
What is the maximum allowed bus frequency for reliable communication with the 11LC161T-E/SN?
The 11LC161T-E/SN supports a maximum serial bus frequency of 100 kHz (equivalent to 100 kbps bit rate). At this rate, the minimum bit period (TE) is 10 µs. Exceeding this frequency violates AC specifications and may cause synchronization loss due to insufficient setup/hold margins on SCIO transitions.
How does the 11LC161T-E/SN handle power-loss during a write cycle?
The 11LC161T-E/SN incorporates built-in power-loss protection circuitry that monitors VCC. If voltage drops below the functional threshold during a write, the internal write cycle aborts safely and preserves pre-write data integrity. No external capacitors or brown-out detectors are required to meet this behavior per Microchip's characterization.
Can the 11LC161T-E/SN be used with a 1.8V microcontroller?
No - the 11LC161T-E/SN requires a minimum VCC of 2.5V and is not rated for 1.8V operation. For 1.8V systems, the functionally identical 11AA161T-I/SN (1.8–5.5V, Industrial temp) should be selected instead, as it shares the same 16K density, UNI/O® interface, and 0xA1 address but supports lower voltage rails.
11LC161T-E/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SOIC
11LC161T-E/SN FAQ
1.How can I place an order for 11LC161T-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 11LC161T-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 11LC161T-E/SN reliable?
The price and inventory of 11LC161T-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 11LC161T-E/SN is usually 5 days.
3.What payment methods are accepted for 11LC161T-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 11LC161T-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 11LC161T-E/SN?
11LC161T-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 11LC161T-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 11LC161T-E/SN?
For technical support, including 11LC161T-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 11LC161T-E/SN requirements.
6.How does Aetrix verify that 11LC161T-E/SN is sourced from the original manufacturer or authorized distributors?
All 11LC161T-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 11LC161T-E/SN meets industry standards.
7.What is the process for return or replacement of 11LC161T-E/SN?
All 11LC161T-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 11LC161T-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 11LC161T-E/SN part is unused and in its original packaging.
Return procedure for 11LC161T-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
11LC161T-E/SN Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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