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Microchip Technology 93AA76AT-I/SN
- Part No.:
- 93AA76AT-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93AA76AT-I/SN.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,450
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Product details
Overview
93AA76AT-I/SN from Microchip Technology is an 8Kbit, low-voltage, serial EEPROM with fixed 8-bit organization (1024 × 8), industrial temperature range (−40°C to +85°C), 1.8–5.5V supply, and Microwire-compatible 3-wire interface. It delivers 1 million erase/write cycles, >200-year data retention, and power-on/off data protection - used in embedded system configuration storage, sensor calibration memory, and firmware parameter backup.
For engineers reviewing the 93AA76AT-I/SN datasheet, 93AA76AT-I/SN pinout, 93AA76AT-I/SN application, or 93AA76AT-I/SN equivalent, key selection criteria include VCC operating range (1.8–5.5V), guaranteed 8-bit x1024 organization (no ORG pin), industrial-grade reliability, self-timed write/erase, and SOIC-8 package compatibility with legacy board layouts.
Technical Context
This device implements a synchronous 3-wire Microwire interface (CS/CLK/DI/DO) with no ORG or PE pins - confirming it is a dedicated 'A' variant. It uses internal auto-erase before write, supports sequential read, and asserts Ready/Busy status via DO pin during programming.
All operations are gated by CS activation and clocked on CLK rising edges; instructions require 13–29 clock cycles depending on function. Power-on reset logic ensures EWDS mode at startup, requiring explicit EWEN before any erase/write.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1024 × 8-bit), fixed x8 organization - no external configuration needed |
| VCC Range | 1.8 V to 5.5 V - supports single-supply operation across 1.8V, 3.3V, and 5V systems |
| Endurance | 1,000,000 erase/write cycles - enables frequent field updates in telemetry or logging applications |
| Data Retention | >200 years at 25°C - suitable for long-lifecycle industrial equipment without refresh |
| Write Cycle Time | 5 ms typical (TWC) - deterministic timing for real-time firmware parameter commits |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - minimal GPIO usage, no address bus required |
| Temp Range | −40°C to +85°C (Industrial grade) - validated for factory automation and outdoor edge nodes |
Pinout & Package
8-lead SOIC (SN) package with standard 150-mil width; RoHS-compliant matte tin finish. Pin 1 marked by laser dot; pin 1 ID corner matches JEDEC MS-012AA outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable - must be held high ≥250 ns between commands; deselects device into standby |
| 2 (CLK) | Serial Clock | Rising-edge synchronized I/O - tolerates stopped clock; no cycles needed during self-timed write |
| 3 (DI) | Data Input | Accepts start bit, opcode, address, and data - requires stable setup/hold per AC specs |
| 4 (DO) | Data Output / Status | Tri-state output: data during READ, Ready/Busy flag during programming (low = busy) |
| 5 (VSS) | Ground | Reference return path - must be low-impedance for noise immunity during write verification |
| 6 | Not connected | No internal connection - floating; not bonded in die; electrically isolated |
| 7 | Not connected | No internal connection - floating; not bonded in die; electrically isolated |
| 8 (VCC) | Power Supply | 1.8–5.5V input - includes internal POR circuit triggering at ~1.5V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write with auto-erase | Eliminates external timing control - simplifies host firmware and guarantees completion before next command |
| Power-on/off data protection | Hardware-enforced write inhibition below 1.5V VCC - prevents corruption during brown-out or hot-swap |
| Ready/Busy status via DO pin | Enables polling-based programming flow without interrupt or timer dependency - reduces MCU resource load |
| Sequential read capability | Allows continuous burst reads across addresses with single CS assertion - improves configuration loading speed |
| Industry-standard Microwire interface | Ensures drop-in compatibility with existing 3-wire EEPROM drivers and HAL layers across multiple MCU families |
Applications
| Industrial Sensor Calibration | Embedded Firmware Parameter Storage |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration memory holding trim values accessed at boot and updated during field recalibration. Use Value: 1M endurance supports hundreds of recalibrations over product lifetime; 1.8V operation enables direct interface with low-power sensor ASICs. | Use Scenario: Holding user-modifiable settings (baud rate, network ID, alarm thresholds) in HVAC controller firmware. IC Role / Device Role / Timing Role: Dedicated parameter EEPROM interfaced via GPIO bit-banged Microwire to avoid consuming SPI peripherals. Use Value: Fixed 8-bit organization simplifies address decoding; 5ms write time allows safe commit during button-press event handling. |
| Medical Device Configuration Backup | Automotive Body Control Module Settings |
Use Scenario: Preserving critical therapy parameters and usage logs in portable infusion pumps after power loss. IC Role / Device Role / Timing Role: Fail-safe configuration vault with >200-year retention - immune to battery-backed SRAM volatility. Use Value: Industrial temp rating covers clinical environments; RoHS compliance meets IEC 60601-1 material requirements. | Use Scenario: Storing seat position memory, mirror presets, and lighting profiles in automotive door modules. IC Role / Device Role / Timing Role: Secondary nonvolatile memory supplementing main MCU flash - decouples user settings from firmware updates. Use Value: SOIC-8 footprint matches legacy designs; 1.8–5.5V range accommodates 12V system DC-DC ripple without level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC76AT-I/SN | Same 8Kbit x8 organization, but 2.5–5.5V VCC range - lacks 1.8V support | Not suitable for 1.8V-only systems; otherwise identical pinout, timing, and instruction set | Select only if system VCC ≥2.5V and 1.8V operation is unnecessary |
| AT25080B-SSHL-T | SPI interface (4-wire), 8Kbit x8, 1.8–5.5V, 20 MHz max clock - different protocol stack | Requires SPI peripheral or bit-banged driver rewrite; no Ready/Busy DO pin - relies on WIP polling | Choose when migrating to SPI ecosystem or needing faster clock rates; verify firmware compatibility |
Compared with 93LC76AT-I/SN, the 93AA76AT-I/SN enables true 1.8V operation in ultra-low-power systems; versus AT25080B-SSHL-T, it retains Microwire simplicity and hardware-ready/busy signaling at the cost of lower max clock speed.
Availability
93AA76AT-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded firmware parameter storage, and medical device configuration backup requiring stable component supply across extended production lifecycles.
Supply support for 93AA76AT-I/SN 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 devices, and memory solutions, headquartered in Chandler, Arizona.
The 93XX series EEPROMs were designed specifically for space-constrained, low-power embedded systems requiring reliable, pin-efficient nonvolatile storage - emphasizing robustness, wide voltage operation, and Microwire interoperability.
FAQ
What is the memory organization of the 93AA76AT-I/SN?
The 93AA76AT-I/SN has a fixed 1024 × 8-bit (8Kbit) organization with no ORG pin - it is a dedicated 'A' variant. Unlike 'C' versions, it does not support x16 mode or external word-size selection. This eliminates configuration uncertainty and simplifies address mapping in host firmware.
Does the 93AA76AT-I/SN support 1.8V operation?
Yes, the 93AA76AT-I/SN operates across 1.8V to 5.5V, making it compatible with modern ultra-low-power microcontrollers and sensor ICs. Its power-on reset circuit activates at ~1.5V, ensuring data integrity during brown-out conditions - a key differentiator from 93LC76A (2.5V min) and 93C76A (4.5V min) variants.
How is write protection implemented on the 93AA76AT-I/SN?
The 93AA76AT-I/SN uses software-controlled write protection: it powers up in EWDS (Erase/Write Disable) mode, and all erase/write operations require a prior EWEN (Erase/Write Enable) instruction. There is no hardware write-protect pin (PE is absent on 'A' variants), so protection relies entirely on correct command sequencing in firmware.
What package type is used for the 93AA76AT-I/SN?
The 93AA76AT-I/SN is supplied in an 8-lead SOIC (Small Outline Integrated Circuit) package designated 'SN', measuring 3.9mm × 4.9mm with 1.27mm lead pitch. It features RoHS-compliant matte tin plating and laser-marked pin 1 identification per JEDEC MS-012AA standard.
Can the 93AA76AT-I/SN be used with a bit-banged Microwire interface?
Yes, the 93AA76AT-I/SN is fully compatible with bit-banged Microwire implementations. Its timing requirements (e.g., TCKH ≥200 ns at 1.8V) are achievable using standard GPIO toggling on most MCUs. The absence of ORG and PE pins further simplifies software-driven control, and DO pin status polling eliminates need for interrupts.
93AA76AT-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- 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-SOIC
93AA76AT-I/SN FAQ
1.How can I place an order for 93AA76AT-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA76AT-I/SN 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/SN reliable?
The price and inventory of 93AA76AT-I/SN 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/SN is usually 5 days.
3.What payment methods are accepted for 93AA76AT-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA76AT-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA76AT-I/SN?
93AA76AT-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA76AT-I/SN 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/SN?
For technical support, including 93AA76AT-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA76AT-I/SN requirements.
6.How does Aetrix verify that 93AA76AT-I/SN is sourced from the original manufacturer or authorized distributors?
All 93AA76AT-I/SN 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/SN meets industry standards.
7.What is the process for return or replacement of 93AA76AT-I/SN?
All 93AA76AT-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93AA76AT-I/SN, 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/SN part is unused and in its original packaging.
Return procedure for 93AA76AT-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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