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Microchip Technology 11AA080-I/TO
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- Part No.:
- 11AA080-I/TO
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
11AA080-I/TO.pdf
- Description:
- IC EEPROM 8KBIT SGL WIRE TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,590
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Product details
Overview
11AA080-I/TO from Microchip Technology is an 8 Kbit (1,024 × 8) serial EEPROM with single I/O UNI/O® interface, operating from 1.8V to 5.5V, featuring 16-byte page write buffer, Schmitt-trigger SCIO input, and 1 µA max standby current at I-temp (–40°C to +85°C). It is used in space-constrained embedded systems for parameter storage, calibration data retention, and configuration backup.
For engineers reviewing the 11AA080-I/TO datasheet, 11AA080-I/TO pinout, 11AA080-I/TO application, or 11AA080-I/TO equivalent, key selection considerations include its TO-92 package compatibility, 100 kbps UNI/O® bus timing, 1M endurance cycles, block write protection options, and low-voltage operation down to 1.8V in industrial environments.
Technical Context
The 11AA080-I/TO implements Manchester-encoded UNI/O® protocol over a single bidirectional SCIO line, eliminating need for separate clock and data lines. Its internal re-synchronization circuitry tolerates ±0.50% bus frequency drift per byte and ±0.06 UI edge jitter, enabling robust communication with microcontroller GPIOs.
It integrates a STATUS register with Write-In-Progress (WIP) and Write-Enable Latch (WEL) flags, plus BP0/BP1 bits for configurable block protection (none, 1/4, 1/2, or full array). The device uses on-chip high-voltage generation for EEPROM programming and includes slope-controlled output to suppress ground bounce.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Density | 8 Kbit (1,024 × 8 organization) |
| VCC Range | 1.8V to 5.5V - enables direct interface with 1.8V/3.3V/5V logic without level shifters |
| Interface | Single I/O UNI/O® bus - reduces PCB routing to one signal plus VCC/VSS |
| Page Size | 16 bytes - allows efficient burst writes within physical page boundaries |
| Endurance | 1,000,000 erase/write cycles - supports frequent field updates in telemetry or logging |
| Data Retention | >200 years - ensures long-term reliability in unattended industrial deployments |
| Standby Current | 1 µA max (I-temp) - critical for battery-powered sensor nodes and energy-harvesting systems |
| Max Bit Rate | 100 kbps - equivalent to 100 kHz clock, compatible with standard MCU GPIO bit-banging |
Pinout & Package
11AA080-I/TO is housed in a 3-lead TO-92 package (top-down view: Pin 1 = VCC, Pin 2 = VSS, Pin 3 = SCIO), with no NC pins. The SCIO pin serves as bidirectional serial clock/data line using Manchester encoding; VCC supplies power; VSS is system ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (VCC) | Supply voltage input | Accepts 1.8–5.5V; powers internal HV generator and logic; decoupling capacitor required near pin |
| Pin 2 (VSS) | Ground reference | Return path for all currents; must be connected to clean system ground plane |
| Pin 3 (SCIO) | Serial Clock/Data I/O | Bidirectional UNI/O® bus line; requires external pull-up (typically 4.7kΩ); carries clock+data via Manchester encoding |
Key Features
| Feature | Design Value |
|---|---|
| UNI/O® Serial Interface | Single-pin bus eliminates dedicated clock line and simplifies layout in tight spaces like sensor modules |
| Schmitt Trigger Input | 0.05×VCC hysteresis on SCIO rejects noise up to 50 ns spikes, improving immunity in electrically noisy industrial cabinets |
| Output Slope Control | Controlled rise/fall times prevent ground bounce during write cycles, avoiding system-level reset glitches |
| Status Register Access | Real-time WIP/WEL monitoring via RDSR command enables non-blocking firmware wait loops without polling delays |
| Block Write Protection | BP0/BP1 bits allow hardware-level locking of memory segments - prevents accidental overwrite of critical calibration tables |
| Auto-Erase Write Cycle | Self-timed internal erase-before-write eliminates need for host-managed erase commands, reducing firmware complexity |
Applications
| Smart Sensor Calibration Storage | Industrial PLC Configuration Backup |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients and temperature compensation tables in MEMS pressure sensors. IC Role / Device Role / Timing Role: Nonvolatile parameter repository accessed during power-up or recalibration; reads occur at startup, writes only during field service. Use Value: Enables plug-and-play sensor replacement with zero manual setup; 200-year data retention guarantees accuracy across product lifetime. | Use Scenario: Preserving ladder logic configuration, I/O mapping, and alarm thresholds in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Fail-safe configuration keeper that reloads settings after brownout or firmware update; withstands 85°C cabinet temperatures. Use Value: Eliminates downtime from lost configurations; 1 µA standby draw extends backup battery life to >5 years in UPS-equipped units. |
| Medical Device Usage Logs | Automotive Body Control Module Settings |
Use Scenario: Recording sterilization cycles, usage counts, and error events in portable diagnostic equipment with no external storage. IC Role / Device Role / Timing Role: Secure audit trail storage with write-protection enabled for historical logs; accessed via low-speed MCU GPIO. Use Value: Meets IEC 62304 traceability requirements; 1M endurance supports >10 years of daily logging at 300 writes/day. | Use Scenario: Saving user preferences (seat position, mirror angle, lighting themes) and fault codes in automotive BCMs. IC Role / Device Role / Timing Role: Low-power configuration memory powered from always-on battery rail; survives ignition cycling and thermal cycling. Use Value: Maintains personalized settings across vehicle shutdowns; TO-92 package fits into compact BCM housings with minimal board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 11LC080-I/TO | Same 8 Kbit density and TO-92 package, but requires 2.5–5.5V supply (no 1.8V support) | Not suitable for 1.8V systems; otherwise identical UNI/O® timing and protection features | Select only if system VCC ≥2.5V and cost sensitivity outweighs low-voltage flexibility |
| 24AA080-I/P | I²C interface (2-wire), 8-lead PDIP, 1.7–5.5V, 16-byte page, but lacks UNI/O® single-pin advantage | Requires two dedicated pins (SCL/SDA); incompatible bus protocol; higher pin count increases routing complexity | Choose when existing I²C infrastructure exists and board space permits larger package |
Compared with 11LC080-I/TO, the 11AA080-I/TO enables 1.8V operation critical for modern ultra-low-power MCUs, while versus 24AA080-I/P it trades I²C compatibility for single-pin simplicity and smaller TO-92 footprint - ideal for retrofitting legacy designs with minimal layout changes.
Availability
11AA080-I/TO is available at Aetrix Electronics and suitable for industrial sensor nodes, medical diagnostics equipment, and automotive body control modules requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for 11AA080-I/TO 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 manufacturer specializing in microcontrollers, analog devices, and memory products for embedded control applications.
The 11AA080-I/TO belongs to Microchip's UNI/O® serial EEPROM family, designed specifically for space- and pin-constrained systems needing reliable, low-power nonvolatile storage with minimal interface overhead.
FAQ
What is the minimum operating voltage for the 11AA080-I/TO?
The 11AA080-I/TO operates from 1.8V to 5.5V. At 1.8V, it maintains full functionality including 100 kbps UNI/O® communication, page writes, and STATUS register access. This makes the 11AA080-I/TO suitable for direct integration with 1.8V microcontrollers without level-shifting circuitry.
Does the 11AA080-I/TO support hardware write protection?
Yes, the 11AA080-I/TO supports hardware-based block write protection via BP0 and BP1 bits in its STATUS register. These bits can lock none, 1/4, 1/2, or the entire memory array against accidental writes - a feature implemented in silicon and retained across power cycles, independent of software control.
How does the 11AA080-I/TO handle bus synchronization during communication?
The 11AA080-I/TO uses Manchester-encoded start headers to synchronize its internal clock with the master's bus frequency. It continuously re-synchronizes on every MAK bit, tolerating up to ±0.50% frequency drift per byte and ±0.06 UI edge jitter - ensuring reliable operation even with imprecise MCU GPIO timing.
What is the purpose of the SCIO pin on the 11AA080-I/TO?
The SCIO pin on the 11AA080-I/TO serves as the sole bidirectional serial interface for clock, data, and command transmission using Manchester encoding. It combines timing and data into one signal, eliminating the need for separate clock lines and reducing interconnect complexity - a defining feature of the UNI/O® protocol implemented in the 11AA080-I/TO.
Can the 11AA080-I/TO be used in automotive applications?
The 11AA080-I/TO is rated for Industrial temperature range (–40°C to +85°C) only. While it may function in some under-hood or cabin environments, Microchip does not qualify or guarantee its performance for AEC-Q100 automotive applications. For automotive use, consider the pin-compatible 11LC080-E/TO variant, which is specified for –40°C to +125°C and qualified to automotive standards.
11AA080-I/TO Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Packaging:
- Bag
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 8Kbit
- Memory Organization:
- 1K 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:
- Through Hole
- Supplier Device Package:
- TO-92-3
11AA080-I/TO FAQ
1.How can I place an order for 11AA080-I/TO through Aetrix?
Please submit a Request for Quotation (RFQ) for 11AA080-I/TO 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 11AA080-I/TO reliable?
The price and inventory of 11AA080-I/TO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 11AA080-I/TO is usually 5 days.
3.What payment methods are accepted for 11AA080-I/TO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 11AA080-I/TO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 11AA080-I/TO?
11AA080-I/TO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 11AA080-I/TO 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 11AA080-I/TO?
For technical support, including 11AA080-I/TO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 11AA080-I/TO requirements.
6.How does Aetrix verify that 11AA080-I/TO is sourced from the original manufacturer or authorized distributors?
All 11AA080-I/TO 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 11AA080-I/TO meets industry standards.
7.What is the process for return or replacement of 11AA080-I/TO?
All 11AA080-I/TO units undergo pre-shipment inspection (PSI). If there is an issue with 11AA080-I/TO, 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 11AA080-I/TO part is unused and in its original packaging.
Return procedure for 11AA080-I/TO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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