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Microchip Technology 93AA76BT-I/OT
- Part No.:
- 93AA76BT-I/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SOT-23-6
- Datasheet:
-
93AA76BT-I/OT.pdf
- Description:
- IC EEPROM 8KBIT MIC WIRE SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,929
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Product details
Overview
93AA76BT-I/OT from Microchip Technology Inc. is an 8Kbit, low-voltage, serial EEPROM with 1024 × 8-bit organization, Microwire-compatible 3-wire interface (CS/CLK/DI/DO), and industrial temperature range (–40°C to +85°C). It operates from 1.8V to 5.5V, supports self-timed erase/write cycles, and delivers 1,000,000 endurance cycles with >200 years data retention. Used in embedded system configuration storage, sensor calibration data logging, and power-management parameter backup.
For engineers reviewing the 93AA76BT-I/OT datasheet, 93AA76BT-I/OT pinout, 93AA76BT-I/OT application, or 93AA76BT-I/OT equivalent, key selection criteria include its SOT-23-6 package, absence of ORG and PE pins (fixed x8 mode), VCC range compatibility with 1.8V–5.5V microcontrollers, Ready/Busy status via DO pin, and Microwire protocol timing compliance at up to 3 MHz.
Technical Context
The 93AA76BT-I/OT implements a synchronous serial Microwire interface with chip-select–gated operation: CS high enables communication, CLK rising edges clock in opcodes, addresses, and data on DI, while DO outputs read data or Ready/Busy status. No ORG or PE pins are present-confirming fixed 8-bit organization and always-enabled programming per Device Selection Table.
Its internal architecture includes auto-erase-before-write, ERAL/WRAL bulk operations, EWEN/EWDS write-protection control, and power-on/off data protection circuitry. The device enters Standby mode when CS is low, drawing only 1 µA typical ICCS, and asserts DO low during active erase/write cycles for polling-based synchronization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (1024 × 8-bit) - fixed x8 organization; no ORG pin; compatible with 8-bit MCU data buses. |
| VCC operating range | 1.8 V to 5.5 V - supports direct interfacing with 1.8V, 3.3V, and 5V logic without level shifters. |
| Max clock frequency | 3 MHz at VCC ≥ 4.5 V - enables fast configuration reads and writes in time-critical boot sequences. |
| Write endurance | 1,000,000 erase/write cycles - suitable for frequent parameter updates in industrial controllers. |
| Data retention | >200 years at 25°C - ensures long-term reliability in unattended equipment like utility meters. |
| Standby current | 1 µA (typical) at TA = –40°C to +85°C - minimizes quiescent power in battery-backed systems. |
| Operating temperature | –40°C to +85°C (Industrial grade) - validated for deployment in automotive body control modules and factory automation nodes. |
Pinout & Package
93AA76BT-I/OT uses a 6-pin SOT-23 package (package code OT), with pin 1 marked by laser dot. Pin functions are fully defined in DS21796M-page 10: CS (pin 5), CLK (pin 4), DI (pin 3), DO (pin 1), VSS (pin 2), VCC (pin 6). No ORG or PE pins - consistent with 'A'-suffix devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 5) | Chip Select input | Active-high enable; must be held low ≥250 ns between instructions; forces Standby mode when low. |
| CLK (Pin 4) | Serial clock input | Rising-edge synchronized; accepts stopped clocks; no cycles required during self-timed write. |
| DI (Pin 3) | Data input | Receives Start bit, opcode, address, and write data; shares no internal pull-up/down. |
| DO (Pin 1) | Data output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge. |
| VSS (Pin 2) | Ground reference | Return path for all I/O and core logic; must be low-impedance for stable timing. |
| VCC (Pin 6) | Power supply | Supplies core and I/O; internal POR triggers at ~1.5 V; must be ≥4.5 V for ERAL/WRAL. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write cycles | Eliminates external timing control; TWC = 5 ms max for AA/LC versions - simplifies firmware driver design. |
| Ready/Busy status on DO | Enables polling-based synchronization without dedicated interrupt lines - reduces MCU pin count. |
| Power-on/off data protection | Hardware-enforced write inhibition below VCC threshold (~1.5 V) - prevents corruption during brown-out. |
| Sequential read function | Auto-incrementing address counter allows burst reads of contiguous registers - accelerates configuration loading. |
| Pb-free & RoHS compliant | Matte tin finish on SOT-23 leads - meets global environmental compliance requirements for industrial PCB assembly. |
Applications
| Motor Control Parameter Storage | Smart Sensor Calibration Data |
|---|---|
Use Scenario: Storing PID coefficients, fault thresholds, and runtime calibration offsets in BLDC motor drives. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during startup and field updates via SPI-like Microwire interface. Use Value: Enables field-reprogrammable tuning without firmware reflash; 1M endurance supports lifetime recalibration. | Use Scenario: Retaining factory-trimmed offset/gain values and temperature compensation tables in industrial pressure sensors. IC Role / Device Role / Timing Role: Dedicated calibration memory mapped to sensor ASIC via shared 3-wire bus; accessed at power-up. Use Value: Eliminates manual trimming; >200-year retention guarantees accuracy over equipment lifespan. |
| Power Management Unit Settings | IoT Edge Device Configuration |
Use Scenario: Holding undervoltage lockout (UVLO) thresholds, sequencing delays, and rail enable states in multi-rail PMUs. IC Role / Device Role / Timing Role: System-level configuration store read during power-on reset; updated only during maintenance mode. Use Value: 1.8V–5.5V VCC range matches PMU input rails; 1 µA standby current avoids loading auxiliary supplies. | Use Scenario: Storing Wi-Fi credentials, OTA update keys, and device-specific identifiers in battery-powered edge nodes. IC Role / Device Role / Timing Role: Secure boot-time configuration source; accessed before wireless stack initialization. Use Value: SOT-23-6 footprint saves board space; industrial temp rating ensures reliability in outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC76BT-I/OT | VCC range 2.5–5.5 V; same 1024×8 organization, SOT-23-6, and Microwire interface. | Not suitable for 1.8V systems; requires minimum 2.5V - excludes ultra-low-power designs. | Select 93LC76BT-I/OT only if system VCC ≥2.5V and 1.8V operation is unnecessary. |
| AT25080B-MAHL-T | SPI interface (4-wire), 8Kbit (1024×8), SOIC-8 package; no DO status pin - requires software timeout instead of polling. | Requires additional chip select line and different command set; incompatible Microwire timing. | Choose AT25080B-MAHL-T only when migrating to SPI infrastructure and board layout permits SOIC-8. |
Compared with 93LC76BT-I/OT, the 93AA76BT-I/OT supports lower-voltage operation critical for energy harvesting systems, while the AT25080B-MAHL-T trades hardware-ready signaling for broader SPI ecosystem compatibility - neither offers pin-to-pin replacement.
Availability
93AA76BT-I/OT is available at Aetrix Electronics and suitable for motor control parameter storage, smart sensor calibration data retention, and power management unit settings requiring stable component supply across extended product lifecycles.
Supply support for 93AA76BT-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, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93XX series EEPROMs were designed for cost-sensitive, low-power embedded systems requiring reliable nonvolatile storage in compact packages - especially where Microwire compatibility and wide VCC range are essential.
FAQ
What is the memory organization of the 93AA76BT-I/OT?
The 93AA76BT-I/OT has a fixed 1024 × 8-bit (8Kbit) organization. As an 'A'-suffix device, it lacks ORG and PE pins - confirming dedicated x8 mode and always-enabled programming. This differs from 'C'-suffix variants that support configurable word size via the ORG pin.
Does the 93AA76BT-I/OT support 1.8V operation?
Yes, the 93AA76BT-I/OT supports full functionality across 1.8V to 5.5V VCC. Its 1.8V minimum enables direct interfacing with ultra-low-power MCUs and battery-supplied circuits - a key differentiator from 93LC76BT-I/OT (2.5V min) and 93C76BT-I/OT (4.5V min).
How is Ready/Busy status signaled on the 93AA76BT-I/OT?
The 93AA76BT-I/OT signals Ready/Busy status on the DO pin: DO goes low during active erase/write cycles and returns high upon completion. This occurs only when CS is brought high after ≥250 ns low (TCSL); DO remains in High-Z if CS stays low throughout the operation.
What package type does the 93AA76BT-I/OT use?
The 93AA76BT-I/OT uses a 6-pin SOT-23 package (package code OT), with pin 1 identified by a laser mark. Its compact 2.9 mm × 1.6 mm footprint and surface-mount construction support high-density PCB layouts in space-constrained applications like wearable sensors and compact motor drivers.
Can the 93AA76BT-I/OT be used in automotive applications?
No - the 93AA76BT-I/OT is rated for Industrial temperature range (–40°C to +85°C), not Automotive (–40°C to +125°C). For automotive use, Microchip's 93AA76CT-E/OT (with E-temp grade) or 93LC76CT-E/OT would be appropriate alternatives, both supporting the extended temperature range and same SOT-23-6 form factor.
93AA76BT-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:
- 512 x 16
- 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
93AA76BT-I/OT FAQ
1.How can I place an order for 93AA76BT-I/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA76BT-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 93AA76BT-I/OT reliable?
The price and inventory of 93AA76BT-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 93AA76BT-I/OT is usually 5 days.
3.What payment methods are accepted for 93AA76BT-I/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA76BT-I/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA76BT-I/OT?
93AA76BT-I/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA76BT-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 93AA76BT-I/OT?
For technical support, including 93AA76BT-I/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA76BT-I/OT requirements.
6.How does Aetrix verify that 93AA76BT-I/OT is sourced from the original manufacturer or authorized distributors?
All 93AA76BT-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 93AA76BT-I/OT meets industry standards.
7.What is the process for return or replacement of 93AA76BT-I/OT?
All 93AA76BT-I/OT units undergo pre-shipment inspection (PSI). If there is an issue with 93AA76BT-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 93AA76BT-I/OT part is unused and in its original packaging.
Return procedure for 93AA76BT-I/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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