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Microchip Technology 93AA76BT-I/MS
- Part No.:
- 93AA76BT-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
93AA76BT-I/MS.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,304
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Product details
Overview
93AA76BT-I/MS 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 features self-timed erase/write cycles, 1,000,000 endurance cycles, >200-year data retention, and operates from 1.8V to 5.5V - used in embedded system configuration storage, sensor calibration data logging, and power-management parameter backup.
For engineers reviewing the 93AA76BT-I/MS datasheet, 93AA76BT-I/MS pinout, 93AA76BT-I/MS application, or 93AA76BT-I/MS equivalent, key selection considerations include its fixed 8-bit word size (no ORG pin), absence of PE pin, MSOP-8 package compatibility, and support for sequential read and Ready/Busy status polling via DO pin.
Technical Context
The 93AA76BT-I/MS implements a synchronous serial Microwire protocol with start-bit detection, opcode-driven instruction set (READ, WRITE, ERASE, EWEN/EWDS), and internal auto-erase-before-write logic. It uses a dedicated 8-bit memory array with no ORG or PE pins - distinguishing it from 'C' variants - and relies on CS-controlled standby mode with TCSL ≥250 ns between commands.
Timing is governed by VCC-dependent clock frequency limits (up to 3 MHz at VCC ≥4.5V), with strict setup/hold requirements (e.g., TDIS/TDIH = 50–250 ns) and status-valid timing (TSV ≤500 ns at 1.8V). The DO pin serves dual role: data output during READ and Ready/Busy indicator during programming, requiring CS high ≥250 ns after TCSL to sample status.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1024 × 8-bit organization - fixed, no ORG pin) |
| VCC Range | 1.8V to 5.5V - supports single-supply operation in battery-powered and mixed-voltage systems |
| Clock Frequency | Up to 3 MHz at VCC ≥4.5V - enables fast configuration reads in real-time control loops |
| Write Cycle Time | 5 ms typical - defines minimum interval between successive WRITE commands |
| Endurance | 1,000,000 erase/write cycles - ensures long-term reliability in field-updatable firmware storage |
| Data Retention | >200 years at 25°C - guarantees nonvolatile storage integrity across product lifecycle |
| Interface | 3-wire Microwire (CS/CLK/DI/DO) - minimal GPIO usage, compatible with legacy microcontrollers |
Pinout & Package
8-lead MSOP (150-mil) package with exposed pad (optional VSS connection), Pb-free Matte Tin finish, footprint compatible with SOIC-8 but 30% smaller area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions to reset internal state |
| 2 CLK | Serial Clock | Positive-edge synchronized I/O; clocking stops during self-timed write without affecting cycle completion |
| 3 DI | Data Input | Receives start bit, opcode, address, and write data; tolerant of bus conflict if shared with DO (requires series resistor) |
| 4 DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge |
| 5 VSS | Ground | Reference for all I/O and internal circuitry; exposed pad may be tied to VSS for thermal performance |
| 6 - | No Connect | Pin 6 is unassigned - not bonded; must remain floating or grounded per layout best practice |
| 7 - | No Connect | Pin 7 is unassigned - not bonded; must remain floating or grounded per layout best practice |
| 8 VCC | Power Supply | Supplies core and I/O; internal POR triggers at ~1.5V - prevents spurious writes during brown-out |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates external timing control - simplifies firmware driver design and reduces CPU overhead |
| Ready/Busy status on DO | Enables polling-based programming flow without interrupt or timer dependency |
| Sequential read mode | Allows continuous burst read of multiple addresses with single CS assertion - improves configuration load speed |
| Power-on/off data protection | Hardware-enforced write inhibition below 1.5V VCC - prevents corruption during power ramp |
| Pb-free & RoHS compliant | Meets global environmental compliance requirements for industrial and consumer manufacturing |
Applications
| Industrial Sensor Calibration | Embedded System Configuration |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed at power-up; 5 ms write latency acceptable due to infrequent recalibration. Use Value: Enables field-replaceable sensor modules without reprogramming host MCU firmware. | Use Scenario: Holding boot-time configuration flags (e.g., CAN baud rate, display brightness, network MAC address) in HVAC controller mainboards. IC Role / Device Role / Timing Role: Serial configuration ROM interfaced to 8-bit MCU GPIOs; sequential read reduces initialization time. Use Value: Decouples hardware revision from software build - allows same firmware image across multiple SKUs. |
| Power Management Backup | Medical Device Settings Storage |
Use Scenario: Saving last-known operating state (voltage thresholds, fault counters, watchdog timeout values) in uninterruptible power supplies. IC Role / Device Role / Timing Role: Low-power standby memory (1 µA ICCS) retaining data during AC dropout; 1.8V operation extends hold-up time. Use Value: Ensures deterministic recovery after brown-out without requiring full system reboot or recalibration. | Use Scenario: Storing user-adjusted therapy parameters (e.g., infusion rate, alarm limits) in portable insulin pumps. IC Role / Device Role / Timing Role: Certified data storage element with >200-year retention - meets IEC 62304 Class C data integrity requirements. Use Value: Eliminates need for battery-backed SRAM, reducing BOM cost and eliminating battery leakage risk. |
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/MS | VCC range 2.5–5.5V; otherwise identical pinout, timing, and instruction set | Not suitable for 1.8V systems; requires higher minimum supply voltage | Select when system VCC never drops below 2.5V and tighter VCC tolerance is acceptable |
| AT25080B-MAHL-T | SPI interface (4-wire), 8Kbit (1024×8), 1.8–5.5V, 20 MHz max clock | Requires additional CS line and different command protocol; faster write but no Ready/Busy polling | Choose for SPI-native platforms where higher throughput justifies protocol redesign |
Compared with 93LC76BT-I/MS, the 93AA76BT-I/MS supports lower-voltage operation critical for energy-harvesting designs, while the AT25080B offers SPI speed advantages at the cost of driver complexity and loss of hardware status signaling.
Availability
93AA76BT-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system configuration, and power management backup requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 93AA76BT-I/MS 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 93AAxx family was designed specifically for cost-sensitive, low-power serial EEPROM applications in industrial, automotive, and consumer systems - emphasizing robustness, wide VCC range, and Microwire compatibility with legacy controllers.
FAQ
What is the memory organization of the 93AA76BT-I/MS?
The 93AA76BT-I/MS has a fixed 1024 × 8-bit organization - meaning it provides 1,024 bytes of addressable storage with 8-bit words. Unlike 'C' variants, it lacks an ORG pin and cannot be configured for 16-bit operation. This simplifies PCB layout and firmware design for byte-oriented data structures.
Does the 93AA76BT-I/MS include a Program Enable (PE) pin?
No, the 93AA76BT-I/MS does not have a PE pin. It belongs to the 'A' variant family, which omits both ORG and PE pins. Programming is always enabled after issuing an EWEN command; write protection must be implemented in firmware or via external logic, unlike 'C' versions with hardware PE control.
What package type is used for the 93AA76BT-I/MS?
93AA76BT-I/MS uses an 8-lead MSOP (Mini Small Outline Package) with 150-mil body width and exposed thermal pad. Its pinout matches standard SOIC-8 but occupies ~30% less board area, making it ideal for space-constrained industrial control modules and portable medical devices.
How does the Ready/Busy status work on the 93AA76BT-I/MS?
During erase or write operations, the DO pin outputs Ready/Busy status: logic low indicates ongoing programming, logic high signals completion. To sample status, CS must be brought high for ≥250 ns after TCSL - then DO reflects readiness. After completion, issuing a Start bit followed by CS low clears the status flag.
What is the minimum VCC required for reliable operation of the 93AA76BT-I/MS?
The 93AA76BT-I/MS requires VCC ≥1.8V for full specification compliance across the industrial temperature range (–40°C to +85°C). Below ~1.5V, internal power-on reset activates and inhibits all write operations - preventing data corruption during brown-out conditions.
93AA76BT-I/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not 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:
- 8-MSOP
93AA76BT-I/MS FAQ
1.How can I place an order for 93AA76BT-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA76BT-I/MS 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/MS reliable?
The price and inventory of 93AA76BT-I/MS 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/MS is usually 5 days.
3.What payment methods are accepted for 93AA76BT-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA76BT-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA76BT-I/MS?
93AA76BT-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA76BT-I/MS 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/MS?
For technical support, including 93AA76BT-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA76BT-I/MS requirements.
6.How does Aetrix verify that 93AA76BT-I/MS is sourced from the original manufacturer or authorized distributors?
All 93AA76BT-I/MS 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/MS meets industry standards.
7.What is the process for return or replacement of 93AA76BT-I/MS?
All 93AA76BT-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 93AA76BT-I/MS, 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/MS part is unused and in its original packaging.
Return procedure for 93AA76BT-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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