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Microchip Technology 11AA020-I/SN
- Part No.:
- 11AA020-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
11AA020-I/SN.pdf
- Description:
- IC EEPROM 2KBIT SGL WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:331
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Product details
Overview
11AA020-I/SN from Microchip Technology is a 2 Kbit (256 × 8) serial EEPROM with UNI/O® single I/O bus interface, operating from 1.8V to 5.5V, featuring 16-byte page write buffer, 1 µA max standby current (I-temp), and Schmitt-trigger SCIO input for noise immunity in space-constrained embedded systems.
For engineers reviewing the 11AA020-I/SN datasheet, 11AA020-I/SN pinout, 11AA020-I/SN application, or 11AA020-I/SN equivalent, key selection criteria include its 1.8V low-voltage operation, Manchester-encoded UNI/O® timing compliance (10–100 kHz), built-in block write protection (0/¼/½/all), and SOT-23-3 package compatibility with legacy 3-pin footprint designs.
Technical Context
The 11AA020-I/SN implements a Manchester-encoded, master-controlled UNI/O® bus protocol over a single bidirectional SCIO line, eliminating need for separate clock and data lines. 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 dynamic re-synchronization during each MAK bit to tolerate up to ±0.50% frequency drift per byte and ±0.06 UI edge jitter, enabling robust communication across voltage/temperature variations. Write cycles are self-timed (max 10 ms), with automatic erase before programming and hardware write protection via VCC monitoring and latch control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Density | 2 Kbit (256 × 8 organization) - fixed memory map usable for calibration data, device IDs, or configuration storage without external address decoding |
| Interface | UNI/O® single I/O bus - reduces PCB routing to one signal plus VCC/VSS, ideal for ultra-low-pin-count microcontrollers |
| VCC Range | 1.8V to 5.5V - enables direct interfacing with 1.8V logic families and backward compatibility with 3.3V/5V systems |
| Standby Current | ≤1 µA at TA = 85°C - extends battery life in always-on sensor nodes and portable medical devices |
| Write Endurance | 1,000,000 erase/write cycles - supports frequent firmware parameter updates in industrial controllers |
| Data Retention | >200 years at +25°C - ensures long-term reliability for automotive ECUs and infrastructure equipment |
| Page Size | 16 bytes - allows efficient burst writes of sensor calibration tables or network MAC addresses without multiple commands |
Pinout & Package
11AA020-I/SN is packaged in 3-lead SOT-23 (SN suffix), with SCIO serving as bidirectional serial clock/data line, VCC as supply input, and VSS as ground reference. No NC pins are connected internally.
| 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 to eliminate ground bounce |
| VSS | Ground Reference | Return path for all internal circuitry - must be low-impedance connection to avoid timing skew on SCIO transitions |
| VCC | Supply Voltage | Power input for EEPROM core and I/O driver - supports brown-out detection circuitry for power-fail write protection |
Key Features
| Feature | Design Value |
|---|---|
| UNI/O® Bus Protocol | Single-wire Manchester encoding eliminates clock/data skew and simplifies layout in high-noise motor control environments |
| Page Write Buffer | 16-byte buffer enables atomic multi-byte writes - prevents partial updates during power loss in automotive body control modules |
| Status Register Access | Real-time WIP and WEL bit polling via RDSR command - allows host MCU to avoid blocking delays during write cycles |
| Block Write Protection | Configurable BP0/BP1 bits protect 0%, 25%, 50%, or 100% of array - secures bootloader regions in firmware-upgradable IoT edge devices |
| ESD Robustness | >4 kV HBM - withstands handling and assembly stresses without external TVS diodes in consumer electronics |
Applications
| Smart Sensor Calibration | Industrial PLC Configuration |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients for MEMS accelerometers in handheld test equipment. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed at power-up via UNI/O® bus; tolerates 100 kHz bus rate with ±0.5% drift under thermal cycling. Use Value: Eliminates need for external I²C level shifters - 1.8V operation matches sensor ASIC supply, reducing BOM count by one IC. |
Use Scenario: Holding user-defined I/O mapping and alarm thresholds in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Configuration memory updated infrequently but requiring >200-year retention; accessed via isolated UART-to-UNI/O® bridge IC. Use Value: 1 µA standby current extends backup battery life beyond 10 years; block protection prevents accidental overwrite of safety-critical settings. |
| Medical Device Serial Numbering | Automotive Body Control Module |
Use Scenario: Recording unique device ID, manufacturing date, and calibration timestamp in FDA-regulated infusion pumps. IC Role / Device Role / Timing Role: Secure identity storage with write-protection enabled after initial programming; accessed only during service mode. Use Value: Built-in power-on write protection prevents corruption during unexpected power interruptions during field servicing. |
Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in vehicle door modules. IC Role / Device Role / Timing Role: EEPROM interfaced directly to 8-bit automotive MCU GPIO pin; operates across -40°C to +85°C ambient range. Use Value: SOT-23-3 footprint minimizes PCB area in space-constrained door module assemblies; 1M endurance supports lifetime reprogramming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT21CS01-SSHM-T | 1 Kbit density, 1.7–5.5V, I²C interface, 3-lead SOT-23 package | Requires two I/O lines (SCL/SDA); lacks UNI/O® single-wire simplicity and built-in block protection | Select when existing design uses I²C and density requirement is ≤1 Kbit |
| 11LC020-I/SN | Same 2 Kbit density and UNI/O® interface, but 2.5–5.5V VCC range (no 1.8V support) | Not suitable for 1.8V-only systems; otherwise pin- and function-compatible with identical timing and protection features | Select when system operates ≥2.5V and automotive temperature range (-40°C to +125°C) is required |
Compared with 11AA020-I/SN, AT21CS01-SSHM-T adds I²C compatibility but increases pin count and removes low-voltage operation, while 11LC020-I/SN retains full functional equivalence except for the 1.8V capability - making it a drop-in alternative only in higher-voltage industrial contexts.
Availability
11AA020-I/SN is available at Aetrix Electronics and suitable for smart sensor calibration, industrial PLC configuration, and medical device serialization requiring stable component supply across extended product lifecycles.
Supply support for 11AA020-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 nonvolatile memory solutions for embedded control applications.
The 11AA020-I/SN belongs to Microchip's UNI/O® serial EEPROM family, designed specifically for ultra-low-pin-count systems where board space, wiring complexity, and power efficiency are critical constraints.
FAQ
What is the minimum operating voltage for the 11AA020-I/SN?
The 11AA020-I/SN operates down to 1.8V across the full industrial temperature range (-40°C to +85°C). Below 2.5V, the datasheet specifies reduced timing margins and limits standby current testing to TA = -20°C to +85°C, but functional operation remains guaranteed at 1.8V. This makes the 11AA020-I/SN suitable for battery-powered devices using single-cell Li-ion or alkaline supplies.
Does the 11AA020-I/SN support true single-wire communication without external components?
Yes, the 11AA020-I/SN implements the UNI/O® protocol with integrated Manchester encoding/decoding, Schmitt-trigger input, and slope-controlled output driver - requiring no external clock line, pull-up resistors, or level shifters. The SCIO pin handles bidirectional clock and data transmission autonomously, confirmed by DS22067J-page 2 functional description and Figure 2-1 block diagram.
How does write protection work on the 11AA020-I/SN?
Write protection on the 11AA020-I/SN is controlled by two nonvolatile BP0/BP1 bits in the STATUS register, set via the WRSR command. These bits enable four protection modes: no protection, top ¼, top ½, or full array lock. Protection is enforced at the hardware level during WRITE and WRSR commands, independent of the write enable latch state - ensuring secure configuration storage in the 11AA020-I/SN.
What is the maximum bit rate supported by the 11AA020-I/SN UNI/O® bus?
The 11AA020-I/SN supports a maximum serial bus frequency of 100 kHz, corresponding to a minimum bit period (TE) of 10 µs. This is specified in Table 1-2 AC Characteristics (Param. No. 1 FBUS) and confirmed in the Features list as "100 kbps Max. Bit Rate – Equivalent to 100 kHz Clock Frequency". Timing tolerances include ±0.50% frequency drift per byte and ±0.06 UI jitter.
Can the 11AA020-I/SN be used in automotive applications?
The 11AA020-I/SN is rated for Industrial temperature range (-40°C to +85°C) only. For automotive applications requiring -40°C to +125°C operation, Microchip offers the functionally identical 11LC020-I/SN (same density, UNI/O® interface, and package options) with E-temp qualification. The 11AA020-I/SN itself is not AEC-Q100 qualified and should not be deployed in under-hood or safety-critical automotive subsystems.
11AA020-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:
- 2Kbit
- Memory Organization:
- 256 x 8
- Memory Interface:
- Single Wire
- Clock Frequency:
- 100 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
11AA020-I/SN FAQ
1.How can I place an order for 11AA020-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 11AA020-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 11AA020-I/SN reliable?
The price and inventory of 11AA020-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 11AA020-I/SN is usually 5 days.
3.What payment methods are accepted for 11AA020-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 11AA020-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 11AA020-I/SN?
11AA020-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 11AA020-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 11AA020-I/SN?
For technical support, including 11AA020-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 11AA020-I/SN requirements.
6.How does Aetrix verify that 11AA020-I/SN is sourced from the original manufacturer or authorized distributors?
All 11AA020-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 11AA020-I/SN meets industry standards.
7.What is the process for return or replacement of 11AA020-I/SN?
All 11AA020-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 11AA020-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 11AA020-I/SN part is unused and in its original packaging.
Return procedure for 11AA020-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
11AA020-I/SN Tags
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