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Microchip Technology 93AA76A-I/MS
- Part No.:
- 93AA76A-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
93AA76A-I/MS.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,284
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Product details
Overview
93AA76A-I/MS from Microchip Technology is an 8Kbit, 1024 × 8-bit serial EEPROM with Microwire-compatible 3-wire interface (CS, CLK, DI/DO), operating across 1.8–5.5V supply, rated for -40°C to +85°C industrial temperature range, and packaged in 8-lead MSOP. It delivers 1 million erase/write cycles and >200-year data retention for nonvolatile configuration storage in embedded control systems.
For engineers reviewing the 93AA76A-I/MS datasheet, 93AA76A-I/MS pinout, 93AA76A-I/MS application, or 93AA76A-I/MS equivalent, key selection criteria include its fixed 8-bit organization (no ORG pin), absence of PE pin, low-voltage operation down to 1.8V, self-timed write cycle (5 ms), and Ready/Busy status via DO pin - all critical for power-constrained, space-limited microcontroller peripherals.
Technical Context
The 93AA76A-I/MS implements a synchronous serial Microwire interface with chip-select–gated communication, where instructions (READ, WRITE, ERASE, EWEN/EWDS) are clocked in on CLK rising edges. Its internal logic enforces power-on write protection and automatic ERAL-before-WRAL sequencing.
Unlike 'C' variants, it lacks ORG and PE pins - memory size is fixed at 1024 × 8-bit, and write enable is controlled solely by EWEN/EWDS commands. Standby current is 1 µA (I-temp), and device status is signaled exclusively through DO pin polling during programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1024 × 8-bit); fixed x8 organization - no external word-size configuration required. |
| Supply Voltage | 1.8–5.5 V; enables direct interfacing with 1.8V, 2.5V, 3.3V, and 5V microcontrollers without level-shifting. |
| Write Cycle Time | 5 ms typical; self-timed erase-and-write eliminates need for external timing control or busy-wait loops beyond DO polling. |
| Endurance | 1,000,000 erase/write cycles; supports frequent firmware parameter updates in field-deployed devices. |
| Data Retention | >200 years at 25°C; ensures long-term reliability for calibration data, serial numbers, and configuration settings. |
| Interface Protocol | Microwire 3-wire serial (CS, CLK, DI/DO); compatible with legacy MCU SPI peripherals configured for 3-wire mode. |
| Operating Temp | -40°C to +85°C (Industrial grade); validated for use in industrial controllers, metering, and automotive body electronics. |
Pinout & Package
8-lead MSOP (150-mil width) package with exposed pad (optional VSS connection). Pin 1 marked by laser dot; pin 1 corner located at top-left when notch faces up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; deselects device into 1 µA standby mode. |
| 2 CLK | Serial Clock | Input synchronizing all data transfers; rising edge clocks opcode/address/data; stoppable mid-sequence. |
| 3 DI | Data Input | Serial input for start bit, instructions, addresses, and write data; shares net with DO in bidirectional configurations. |
| 4 DO | Data Output / Status | Tri-state output delivering read data or Ready/Busy status (low = busy, high = ready) during programming. |
| 5 VSS | Ground | Reference return path for all signals and power; exposed pad may be connected to VSS for thermal/mechanical stability. |
| 6 - | No Connect | Not bonded; left floating - no external connection required or recommended. |
| 7 - | No Connect | Not bonded; left floating - no external connection required or recommended. |
| 8 VCC | Power Supply | 1.8–5.5 V supply; internal POR circuit triggers at ~1.5 V to prevent spurious writes during power ramp. |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | Functional down to 1.8 V - enables direct integration with ultra-low-power MCUs and battery-backed systems. |
| Self-Timed Erase/Write | Internal timing eliminates need for external delay circuits or precise software timing - simplifies firmware implementation. |
| Power-On/Off Data Protection | Hardware-enforced write inhibition below 1.5 V VCC - prevents corruption during brown-out or power-up sequences. |
| Ready/Busy Status via DO | Real-time status reporting allows efficient polling instead of fixed delays - reduces average write latency in time-critical applications. |
| Pb-Free & RoHS Compliant | Matte tin finish on all leads - meets global environmental compliance requirements for industrial and consumer products. |
Applications
| Smart Energy Metering | Industrial PLC Configuration |
|---|---|
Use Scenario: Storing tariff tables, calibration coefficients, and tamper-event logs in electricity/water/gas meters with 10+ year field life. IC Role / Device Role / Timing Role: Nonvolatile configuration and event logging EEPROM interfaced to 32-bit ARM Cortex-M MCU via 3-wire Microwire. Use Value: 1M endurance and >200-year retention ensure reliable data storage across full product lifetime without refresh cycles. | Use Scenario: Holding I/O mapping, PID tuning parameters, and firmware update flags in modular programmable logic controllers. IC Role / Device Role / Timing Role: Parameter storage EEPROM supporting hot-swap module identification and runtime reconfiguration. Use Value: 1.8–5.5 V operation allows shared rail with 3.3 V logic; 5 ms write time enables fast parameter saves during maintenance windows. |
| Automotive Body Control Unit | Medical Diagnostic Equipment |
Use Scenario: Saving seat/mirror position presets, lighting profiles, and fault-code history in BCM modules operating across vehicle battery voltage swings. IC Role / Device Role / Timing Role: Industrial-grade EEPROM providing robust NVM for user-customizable settings in harsh automotive environments. Use Value: -40°C to +85°C rating and 1.8 V minimum VCC support stable operation during cold cranking and extended high-temp soak. | Use Scenario: Storing sensor calibration offsets, user preferences, and audit trail timestamps in portable ultrasound and ECG devices. IC Role / Device Role / Timing Role: Low-power serial EEPROM integrated into battery-powered medical subsystems with strict energy budgets. Use Value: 1 µA standby current and 1.8 V compatibility extend battery life while maintaining secure, traceable configuration storage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC76A-I/MS | Same 8Kbit × 8-bit organization, but 2.5–5.5 V VCC range - no 1.8 V support. | Not suitable for 1.8 V systems; otherwise identical interface, timing, and packaging. | Select 93AA76A-I/MS when 1.8 V operation or wider voltage margin is required. |
| AT25080B-MAU-10 | SPI interface (4-wire), 8 Kbit × 8-bit, 1.8–5.5 V, but requires separate HOLD and WP pins not present on 93AA76A. | Requires additional GPIO for WP control; incompatible pinout and command set - firmware rewrite needed. | Choose only if SPI-native host interface exists and 3-wire Microwire compatibility is not required. |
Compared with 93LC76A-I/MS, the 93AA76A-I/MS extends low-voltage operation to 1.8 V for broader MCU compatibility; compared with AT25080B-MAU-10, it retains Microwire simplicity and eliminates dedicated write-protect pin overhead - reducing BOM count and layout complexity.
Availability
93AA76A-I/MS is available at Aetrix Electronics and suitable for smart energy metering, industrial PLC configuration, and automotive body control units requiring stable component supply, long-term obsolescence management, and RoHS-compliant sourcing.
Supply support for 93AA76A-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 microcontrollers, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93AA76A-I/MS belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for cost-sensitive, low-power embedded systems requiring simple, reliable nonvolatile storage with minimal pin count and firmware overhead.
FAQ
What is the memory organization of the 93AA76A-I/MS?
The 93AA76A-I/MS has a fixed 1024 × 8-bit (8 Kbit) organization. Unlike 'C' variants, it does not feature an ORG pin - word size is permanently set to 8-bit, eliminating external configuration logic and simplifying PCB layout and firmware initialization for the 93AA76A-I/MS.
Does the 93AA76A-I/MS support 1.8 V operation?
Yes, the 93AA76A-I/MS operates across 1.8–5.5 V, making it compatible with modern ultra-low-power microcontrollers and battery-backed systems. Its internal power-on reset activates at ~1.5 V, ensuring robust write protection during 1.8 V power ramp - a key differentiator from 93LC76A-I/MS, which requires ≥2.5 V.
How is write protection implemented on the 93AA76A-I/MS?
The 93AA76A-I/MS uses command-based write protection: it powers up in EWDS (Erase/Write Disable) mode, and an EWEN instruction must precede any ERASE or WRITE operation. No hardware PE pin is present - protection is purely firmware-controlled, reducing external component count versus 93AA76C variants.
What is the purpose of the DO pin during programming on the 93AA76A-I/MS?
During ERASE or WRITE cycles, the DO pin serves as a Ready/Busy status indicator: logic low means programming is in progress; logic high indicates completion. This allows efficient polling instead of fixed delays - critical for minimizing latency in real-time systems using the 93AA76A-I/MS.
Is the 93AA76A-I/MS pin-compatible with other 8-lead MSOP EEPROMs?
The 93AA76A-I/MS follows standard 8-lead MSOP (150-mil) mechanical dimensions and pinout (CS/CLK/DI/DO/VSS/NC/NC/VCC), but functional compatibility depends on interface protocol. It is not pin-compatible with SPI EEPROMs like AT25080B due to differing signal definitions and missing HOLD/WP pins - direct replacement requires firmware and schematic validation.
93AA76A-I/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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:
- 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
93AA76A-I/MS FAQ
1.How can I place an order for 93AA76A-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA76A-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 93AA76A-I/MS reliable?
The price and inventory of 93AA76A-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 93AA76A-I/MS is usually 5 days.
3.What payment methods are accepted for 93AA76A-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA76A-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA76A-I/MS?
93AA76A-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA76A-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 93AA76A-I/MS?
For technical support, including 93AA76A-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA76A-I/MS requirements.
6.How does Aetrix verify that 93AA76A-I/MS is sourced from the original manufacturer or authorized distributors?
All 93AA76A-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 93AA76A-I/MS meets industry standards.
7.What is the process for return or replacement of 93AA76A-I/MS?
All 93AA76A-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 93AA76A-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 93AA76A-I/MS part is unused and in its original packaging.
Return procedure for 93AA76A-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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