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Microchip Technology AT93C66AW-10SU-2.7
- Part No.:
- AT93C66AW-10SU-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C66AW-10SU-2.7.pdf
- Description:
- IC EEPROM 4KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,843
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Product details
Overview
AT93C66AW-10SU-2.7 from Microchip Technology (formerly Atmel) is a 4-kbit serial EEPROM with three-wire interface, user-selectable 512×8 or 256×16 organization via ORG pin, 2.7V–5.5V supply range, and 2 MHz max clock rate at 5V. It delivers 1 million write cycles and 100-year data retention for nonvolatile configuration storage in industrial control modules.
For engineers reviewing the AT93C66AW-10SU-2.7 datasheet, AT93C66AW-10SU-2.7 pinout, AT93C66AW-10SU-2.7 application, or AT93C66AW-10SU-2.7 equivalent, key selection criteria include low-voltage operation down to 2.7V, self-timed 10 ms max write cycle, sequential read capability, and compatibility with space-constrained SOIC-8 footprints.
Technical Context
The AT93C66AW-10SU-2.7 implements a synchronous three-wire serial interface (CS/SK/DI/DO) with start-bit–driven instruction decoding. Its internal architecture supports both x8 and x16 memory mapping selected by the ORG pin state, enabling flexible byte- or word-oriented access without external logic.
Write operations require explicit Erase/Write Enable (EWEN) before ERASE or WRITE instructions; all programming modes are disabled by default on power-up. The DO pin provides Ready/Busy status during active erase/write cycles when CS is asserted post-instruction, enabling host polling without fixed timing delays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 4096 bits (512 × 8 or 256 × 16), enabling compact storage of calibration data or device IDs |
| Supply voltage | 2.7V to 5.5V - operates across standard industrial rail ranges without level-shifting |
| Max clock frequency | 2 MHz at VCC = 5V - supports fast configuration reads in real-time systems |
| Write cycle time | ≤10 ms - enables deterministic firmware update latency without blocking host CPU |
| Endurance | 1 million write cycles - sustains frequent recalibration in test equipment or field-programmable devices |
| Data retention | 100 years at 25°C - ensures long-term reliability in unattended infrastructure deployments |
| Operating temperature | −40°C to +85°C - qualified for industrial ambient environments without derating |
Pinout & Package
AT93C66AW-10SU-2.7 is packaged in an 8-lead EIAJ SOIC (8S2), 0.200" wide body, RoHS-compliant green package with NiPdAu lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must be held low for entire instruction sequence including address/data transfer |
| SK | Serial Clock | Synchronous edge-triggered input; rising edge samples DI, falling edge outputs DO |
| DI | Data Input | Serial instruction/address/data input; start bit (1) initiates command decoding |
| DO | Data Output | Tri-state serial output; provides Ready/Busy status during write cycles when CS is reasserted |
| GND | Ground | Reference return path for all I/O and supply currents |
| VCC | Power Supply | Primary DC supply; supports 2.7–5.5V operation with no external regulator required |
| ORG | Organization Select | Logic-high selects 256×16 mode; logic-low selects 512×8 mode; unconnected defaults to x16 |
| NC | No Connect | Internally unused pin; must remain floating or tied to GND/VCC per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable memory organization | Hardware-configurable 512×8 or 256×16 mapping via ORG pin eliminates need for software address translation |
| Self-timed write cycle | Internal timing eliminates requirement for host-controlled write delay loops or external timers |
| Sequential read operation | Automatic address incrementing allows continuous multi-byte reads with single CS assertion |
| Ready/Busy status reporting | DO pin returns logic '0' during active write/erase, enabling efficient polling instead of fixed wait states |
| Low standby current | 6 µA typical at 2.7V - reduces quiescent power in battery-backed or energy-harvesting systems |
Applications
| Industrial Sensor Calibration | Embedded System Configuration |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during boot or maintenance mode via SPI-compatible three-wire interface. Use Value: Enables field-replaceable sensors without reprogramming firmware; 100-year retention prevents drift-related failures over equipment lifetime. | Use Scenario: Holding board-specific configuration such as MAC address, serial number, and hardware revision in network appliances. IC Role / Device Role / Timing Role: Boot-time configuration loader interfaced to microcontroller GPIOs using minimal pin count. Use Value: Reduces BOM cost versus larger SPI flash; 2.7V operation ensures reliable writes during brown-out conditions. |
| Automotive Subsystem Identity | Consumer Device Personalization |
Use Scenario: Recording unique identification and diagnostic history in HVAC control modules. IC Role / Device Role / Timing Role: Secure identity storage accessed only during service mode, isolated from main CAN bus processor. Use Value: Supports OEM traceability requirements; −40°C to +85°C rating matches under-hood thermal profiles. | Use Scenario: Saving user preferences (e.g., display brightness, language) in portable medical monitors. IC Role / Device Role / Timing Role: Low-power configuration store written infrequently but read at every power-on reset. Use Value: 1 µA standby current extends battery life; 1M endurance accommodates daily clinical recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95640-DW | 4-kbit SPI interface (4-wire), 1.8–5.5V supply, 20 MHz max clock | Requires dedicated SPI peripheral; higher speed but larger footprint (SOIC-8 same, but pinout incompatible) | Select when system already uses SPI peripherals and requires faster throughput than 2 MHz |
| AT25640B-SSHL-T | 4-kbit SPI interface, 1.8–5.5V, 20 MHz, built-in write protection registers | Hardware write-protect pins and software lock bits add security not present in AT93C66AW-10SU-2.7 | Choose for applications requiring tamper-resistant configuration storage in public-access devices |
Compared with M95640-DW and AT25640B-SSHL-T, the AT93C66AW-10SU-2.7 offers lower pin count (3-wire vs. 4-wire SPI), simpler host driver implementation, and proven robustness in legacy industrial designs-making it optimal where GPIO conservation and firmware simplicity outweigh raw speed needs.
Availability
AT93C66AW-10SU-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system configuration, automotive subsystem identity, and consumer device personalization requiring stable component supply and long-term lifecycle support.
Supply support for AT93C66AW-10SU-2.7 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 is a global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions with broad industrial and automotive qualification.
The AT93C66AW-10SU-2.7 belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, space-constrained applications requiring reliable, low-pin-count nonvolatile storage with flexible voltage operation.
FAQ
What is the maximum clock frequency supported by AT93C66AW-10SU-2.7?
The AT93C66AW-10SU-2.7 supports up to 2 MHz clock frequency at VCC = 5.0V. At lower supply voltages (2.7V–5.5V), AC characteristics specify minimum SK period of 1000 ns (1 MHz max), ensuring reliable operation across its full voltage range without derating.
How does the ORG pin affect memory organization in AT93C66AW-10SU-2.7?
The ORG pin on AT93C66AW-10SU-2.7 selects between two memory configurations: logic high (or open) configures 256 words × 16 bits, while logic low configures 512 words × 8 bits. This hardware-selectable mapping allows the same AT93C66AW-10SU-2.7 part to serve byte- or word-addressed systems without firmware changes.
Does AT93C66AW-10SU-2.7 support sequential read operations?
Yes, AT93C66AW-10SU-2.7 supports sequential read: after initiating a READ instruction, holding CS low causes automatic address incrementing and continuous data streaming on DO. No dummy bits appear between words, enabling efficient bulk reads of configuration tables or calibration data sets.
What is the write endurance and data retention specification for AT93C66AW-10SU-2.7?
AT93C66AW-10SU-2.7 guarantees 1 million write/erase cycles and 100 years of data retention at 25°C. These values are characterized per JEDEC standards and apply across the full operating temperature range (−40°C to +85°C), with retention degrading predictably at elevated temperatures per Arrhenius modeling.
Is AT93C66AW-10SU-2.7 pin-compatible with other members of the AT93CxxA family?
AT93C66AW-10SU-2.7 shares identical pinout and interface protocol with AT93C56A/66A variants in the same package (e.g., AT93C66A-10SU-2.7), but differs from AT93C66B series which introduced enhanced ESD protection and updated timing. Direct replacement requires verification of timing margins and voltage thresholds in the target application.
AT93C66AW-10SU-2.7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 4Kbit
- Memory Organization:
- 512 x 8, 256 x 16
- Memory Interface:
- 3-Wire Serial
- Clock Frequency:
- 2 MHz
- Write Cycle Time - Word, Page:
- 10ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT93C66AW-10SU-2.7 FAQ
1.How can I place an order for AT93C66AW-10SU-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C66AW-10SU-2.7 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 AT93C66AW-10SU-2.7 reliable?
The price and inventory of AT93C66AW-10SU-2.7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT93C66AW-10SU-2.7 is usually 5 days.
3.What payment methods are accepted for AT93C66AW-10SU-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C66AW-10SU-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C66AW-10SU-2.7?
AT93C66AW-10SU-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C66AW-10SU-2.7 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 AT93C66AW-10SU-2.7?
For technical support, including AT93C66AW-10SU-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C66AW-10SU-2.7 requirements.
6.How does Aetrix verify that AT93C66AW-10SU-2.7 is sourced from the original manufacturer or authorized distributors?
All AT93C66AW-10SU-2.7 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 AT93C66AW-10SU-2.7 meets industry standards.
7.What is the process for return or replacement of AT93C66AW-10SU-2.7?
All AT93C66AW-10SU-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C66AW-10SU-2.7, 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 AT93C66AW-10SU-2.7 part is unused and in its original packaging.
Return procedure for AT93C66AW-10SU-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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