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Microchip Technology 93AA76AT-I/OT
- Part No.:
- 93AA76AT-I/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SOT-23-6
- Datasheet:
-
93AA76AT-I/OT.pdf
- Description:
- IC EEPROM 8KBIT MIC WIRE SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,019
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Product details
Overview
93AA76AT-I/OT from Microchip Technology Inc. is an 8Kbit, low-voltage, serial EEPROM with 1024 × 8-bit organization, industrial temperature range (−40°C to +85°C), 1.8–5.5V supply, and Microwire-compatible 3-wire serial interface. It features self-timed erase/write cycles, 1M endurance, >200-year data retention, and power-on/off data protection - used in embedded system configuration storage and sensor calibration nonvolatile memory.
For engineers reviewing the 93AA76AT-I/OT datasheet, 93AA76AT-I/OT pinout, 93AA76AT-I/OT application, or 93AA76AT-I/OT equivalent, key selection considerations include its SOT-23-6 package, absence of ORG and PE pins (fixed x8 mode), industrial-grade VCC tolerance, and compatibility with legacy Microwire controllers requiring CS/CLK/DI/DO timing compliance per DS21796M.
Technical Context
This device implements a synchronous serial Microwire interface with fixed 8-bit word organization and no external configuration pins - unlike 'C' variants, it lacks ORG and PE terminals and operates exclusively in x8 mode. All instructions (READ, WRITE, ERASE, EWEN, EWDS, ERAL) are clocked on CLK rising edges, with DO providing both data output and Ready/Busy status polling during programming.
It uses internal auto-erase-before-write logic and includes power-supply voltage detection (VPOR = 1.5V typical) for automatic write inhibition below safe operating voltage. Standby current is ≤1 µA at VCC = 2.5V, and write cycle time is 5 ms across its full 1.8–5.5V VCC range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (1024 × 8-bit), fixed x8 organization - no ORG pin required or present. |
| VCC range | 1.8 V to 5.5 V - supports single-supply operation across battery-powered and 3.3V/5V systems. |
| Endurance | 1,000,000 erase/write cycles - ensures long-term reliability in frequent-update applications like metering logs. |
| Data retention | >200 years at +25°C - suitable for lifetime-critical firmware parameter storage without refresh. |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - interoperable with legacy microcontrollers lacking SPI hardware. |
| Write cycle time | 5 ms max - deterministic programming latency enables predictable real-time system response. |
| Operating temp | −40°C to +85°C (Industrial grade) - validated for use in automotive ECUs, industrial PLCs, and outdoor IoT nodes. |
Pinout & Package
Package: SOT-23-6 (lead-free, matte tin finish), 2.9 mm × 1.6 mm footprint, surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | DO (Data Out) | Tri-state serial output for read data and Ready/Busy status; high-Z when CS low or during non-read operations. |
| 2 | VSS | Ground reference for all I/O and core logic; must be connected to system GND plane for noise immunity. |
| 3 | DI (Data In) | Serial input for opcodes, addresses, and write data; sampled on CLK rising edge; not shared with DO in this variant. |
| 4 | CLK (Clock) | Synchronous serial clock input; rising-edge triggered; supports up to 3 MHz at VCC ≥ 4.5V. |
| 5 | CS (Chip Select) | Active-high enable; device enters standby when low; minimum TCSL = 250 ns required between commands. |
| 6 | VCC | Power supply input; internal voltage detector (VPOR ≈ 1.5V) blocks writes during brown-out conditions. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control or software delays - simplifies firmware integration. |
| Power-on/off data protection | Hardware-enforced write inhibit below VPOR threshold prevents corruption during power ramp-up/down. |
| Industry-standard Microwire interface | Direct drop-in replacement for legacy 93AAxx devices without SPI peripheral dependency. |
| Low standby current (≤1 µA) | Enables multi-year battery life in always-on sensor nodes and energy-harvesting applications. |
| Pb-free and RoHS compliant | Meets global environmental regulations; matte tin finish ensures solderability and wire-bond compatibility. |
Applications
| Smart Meter Calibration Storage | Industrial PLC Configuration Memory |
|---|---|
Use Scenario: Storing factory-calibrated ADC gain/offset coefficients and tariff tables in electricity/water meters. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed infrequently but requiring guaranteed retention over 15+ years. Use Value: 1M endurance and >200-year data retention ensure calibration integrity across product lifetime without field recalibration. | Use Scenario: Holding user-defined I/O mapping, PID loop parameters, and alarm thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: Serial configuration EEPROM interfaced to MCU via GPIO bit-banged Microwire protocol. Use Value: 1.8–5.5V VCC range allows direct connection to 3.3V or 5V PLC backplane rails without level-shifting. |
| Automotive Body Control Module Settings | Medical Device Usage Log Storage |
Use Scenario: Saving seat/mirror position presets, lighting profiles, and door lock configurations in BCMs. IC Role / Device Role / Timing Role: Low-power serial EEPROM accessed during vehicle power-up or user command. Use Value: −40°C to +85°C rating and 1 µA standby current meet automotive interior ambient and battery-drain requirements. | Use Scenario: Recording cumulative operational hours, sterilization cycles, and fault events in portable diagnostic equipment. IC Role / Device Role / Timing Role: Tamper-resistant nonvolatile log memory updated after each clinical session. Use Value: Hardware write-protection via VCC brown-out detection prevents accidental log corruption during battery swaps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93AA76A-I/SN | SOIC-8 package; same 1024×8 organization, VCC range, and timing specs; includes exposed pad option. | Requires PCB layout change for larger footprint; better thermal dissipation for high-write-frequency use cases. | Select when board space permits SOIC and higher thermal margin is needed. |
| 93LC76A-I/OT | Same SOT-23-6 package; 2.5–5.5V VCC range (vs. 1.8–5.5V); identical pinout and instruction set. | Not suitable for 1.8V systems; otherwise functionally interchangeable where supply rails are ≥2.5V. | Select when system VCC is stable ≥2.5V and extended low-voltage operation is unnecessary. |
Compared with 93AA76AT-I/OT, the 93AA76A-I/SN offers mechanical robustness and thermal headroom in SOIC, while 93LC76A-I/OT trades 1.8V compatibility for tighter VCC regulation tolerance - both retain identical x8 functionality and Microwire timing behavior.
Availability
93AA76AT-I/OT is available at Aetrix Electronics and suitable for smart meter calibration storage, industrial PLC configuration memory, and automotive body control module settings requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 93AA76AT-I/OT 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 leading provider of microcontroller, analog, and Flash-IP solutions, serving industrial, automotive, and consumer markets with high-reliability semiconductor products.
The 93AA76A/B/C series was designed specifically for cost-sensitive, low-power serial EEPROM applications requiring Microwire compatibility, wide VCC range, and industrial temperature operation - targeting embedded systems where SPI peripherals are unavailable or underutilized.
FAQ
What is the memory organization of the 93AA76AT-I/OT?
The 93AA76AT-I/OT has a fixed 1024 × 8-bit (8Kbit) organization. Unlike 'C' variants, it does not feature an ORG pin and operates exclusively in x8 mode - no external configuration is required or supported. This is confirmed in the Device Selection Table and Pin Function Table of DS21796M, where 'A' versions are explicitly designated as 8-bit-only devices.
Does the 93AA76AT-I/OT support write protection?
Yes, the 93AA76AT-I/OT supports hardware write protection via its built-in power-on/off data protection circuitry and Erase/Write Disable (EWDS) command. While it lacks a dedicated PE pin (present only on 'C' variants), write operations are automatically inhibited when VCC falls below ~1.5V, and all programming requires explicit EWEN instruction before execution - ensuring robust protection against spurious writes.
What package type is used for the 93AA76AT-I/OT?
The 93AA76AT-I/OT uses the SOT-23-6 package (designated 'OT' in Microchip's packaging code), measuring 2.9 mm × 1.6 mm with a 0.95 mm height. Pin 1 is marked by laser, and the device features Pb-free matte tin plating - verified in the Package Types diagram and Package Marking Information section of DS21796M.
Can the 93AA76AT-I/OT operate at 1.8V?
Yes, the 93AA76AT-I/OT is fully specified to operate from 1.8V to 5.5V, as stated in the Device Selection Table and Electrical Characteristics section of DS21796M. At 1.8V, it supports up to 1 MHz clock frequency (A1 parameter), with adjusted AC timing limits (e.g., TCKH = 450 ns min), enabling reliable use in ultra-low-power battery-operated systems.
How many erase/write cycles does the 93AA76AT-I/OT guarantee?
The 93AA76AT-I/OT guarantees 1,000,000 erase/write cycles, as specified in Table 1-2 (A16 parameter) of DS21796M. This endurance rating is tested at 25°C and VCC = 5.0V, and applies across its full industrial temperature range - making it suitable for applications requiring frequent parameter updates such as energy metering or adaptive control systems.
93AA76AT-I/OT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 8Kbit
- Memory Organization:
- 1K x 8
- Memory Interface:
- Microwire
- Clock Frequency:
- 3 MHz
- 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:
- SOT-23-6
93AA76AT-I/OT FAQ
1.How can I place an order for 93AA76AT-I/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA76AT-I/OT 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 93AA76AT-I/OT reliable?
The price and inventory of 93AA76AT-I/OT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93AA76AT-I/OT is usually 5 days.
3.What payment methods are accepted for 93AA76AT-I/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA76AT-I/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA76AT-I/OT?
93AA76AT-I/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA76AT-I/OT 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 93AA76AT-I/OT?
For technical support, including 93AA76AT-I/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA76AT-I/OT requirements.
6.How does Aetrix verify that 93AA76AT-I/OT is sourced from the original manufacturer or authorized distributors?
All 93AA76AT-I/OT 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 93AA76AT-I/OT meets industry standards.
7.What is the process for return or replacement of 93AA76AT-I/OT?
All 93AA76AT-I/OT units undergo pre-shipment inspection (PSI). If there is an issue with 93AA76AT-I/OT, 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 93AA76AT-I/OT part is unused and in its original packaging.
Return procedure for 93AA76AT-I/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93AA76AT-I/OT 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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M24C02-FMC6TG
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AT24CS02-SSHM-T
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