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Microchip Technology AT93C66AY1-10YI-2.7
- Part No.:
- AT93C66AY1-10YI-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
AT93C66AY1-10YI-2.7.pdf
- Description:
- IC EEPROM 4KBIT 3-WIRE 2MHZ 8MAP
- Quantity:
- Payment:
- Shipping:
Inventory:1,938
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Product details
Overview
AT93C66AY1-10YI-2.7 from Microchip Technology (formerly Atmel) is a 4-kbit serial EEPROM with 3-wire interface, user-selectable 512 × 8 or 256 × 16 organization via ORG pin, 2.7V to 5.5V supply operation, and automotive-grade industrial temperature range (−40°C to +85°C). It delivers high reliability in embedded control systems requiring nonvolatile parameter storage.
For engineers reviewing the AT93C66AY1-10YI-2.7 datasheet, AT93C66AY1-10YI-2.7 pinout, AT93C66AY1-10YI-2.7 application, or AT93C66AY1-10YI-2.7 equivalent, key selection considerations include its 2 MHz max clock rate at 5V, self-timed 10 ms write cycle, 1 million write endurance, 100-year data retention, and compatibility with space-constrained PCB layouts using the 8-lead MAP package.
Technical Context
The AT93C66AY1-10YI-2.7 implements a synchronous 3-wire serial interface (CS, SK, DI/DO) with instruction-based command set including READ, WRITE, ERASE, EWEN, EWDS, ERAL, and WRAL. Its internal organization is dynamically selected by the ORG pin state-high for x16 mode (256 words), low for x8 mode (512 words)-and supports sequential read without dummy bits between addresses.
It operates across VCC = 2.7V–5.5V with standby current as low as 6.0 µA at 2.7V, features READY/BUSY status reporting via DO during write/erase cycles, and includes built-in write protection via Erase/Write Enable/Disable protocol to prevent accidental modification. The device is qualified per AEC-Q100 stress test standards for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4096 bits (512 × 8 or 256 × 16 configuration) |
| Supply Voltage Range | 2.7V to 5.5V - enables direct interface with 3.3V and 5V microcontrollers without level shifting |
| Max Clock Frequency | 2 MHz at 5V - supports fast parameter loading in real-time control loops |
| Write Cycle Time | 10 ms maximum - deterministic timing for firmware-safe nonvolatile updates |
| Endurance | 1 million write cycles - sufficient for daily calibration logging over 27 years |
| Data Retention | 100 years at 25°C - ensures long-term validity of stored calibration, serial, or configuration data |
| Operating Temperature | −40°C to +85°C - meets industrial and automotive under-hood ambient requirements |
| Package | 8-lead MAP (4.90 mm × 3.00 mm body) - compact footprint for space-limited modules |
Pinout & Package
AT93C66AY1-10YI-2.7 is housed in an 8-lead Miniature Array Package (MAP), measuring 4.90 mm × 3.00 mm with 0.65 mm lead pitch. This RoHS-compliant, lead-free/halogen-free package supports automated SMT assembly and provides thermal and mechanical robustness for automotive and industrial environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must be held low for entire instruction sequence; controls DO output impedance and READY/BUSY reporting |
| SK | Serial Clock | Input clock synchronizing all data transfers; rising edge samples DI, falling edge outputs DO; tSKH/tSKL ≥ 250 ns at 2.7V |
| DI | Data Input | Serial input for instructions, addresses, and write data; accepts start bit (1), op code, address, and data fields |
| DO | Data Output | Open-drain output delivering read data or READY/BUSY status; requires external pull-up; high = ready, low = busy |
| VCC | Power Supply | Primary power rail (2.7–5.5V); decoupling capacitor required within 10 mm for noise immunity |
| GND | Ground | Reference return path for all signals and power; must be low-impedance connection to system ground plane |
| ORG | Organization Select | Logic-level controlled memory mapping: VCC = 512×8, GND = 256×16; unconnected defaults to x16 via internal 1 MΩ pull-up |
| DC | Don't Connect | No internal connection; must remain floating or tied to GND/VCC only if required by board layout constraints |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable memory organization | Hardware-configurable 512×8 or 256×16 layout via ORG pin - eliminates need for software remapping or firmware variants |
| Self-timed write cycle | Fixed 10 ms max duration with READY/BUSY status on DO - enables precise timeout handling without polling overhead |
| Instruction-based write protection | EWEN/EWDS protocol required before any erase/write - prevents corruption from noise, brown-out, or software faults |
| Sequential read mode | Continuous data stream without inter-word dummy bits - reduces host CPU clock cycles and improves throughput for bulk reads |
| Automotive-grade qualification | AEC-Q100 compliant with extended temperature and humidity testing - validated for engine control, ADAS, and body electronics |
| Low-power standby | 6.0 µA max ISB2 at 2.7V - extends battery life in always-on sensor nodes and telematics modules |
Applications
| Motor Control Calibration Storage | Industrial PLC Configuration Memory |
|---|---|
Use Scenario: Storing motor winding resistance, hall sensor offset, and PID tuning parameters in BLDC motor drives. IC Role / Device Role / Timing Role: Nonvolatile parameter repository accessed during boot and runtime recalibration; interfaces via SPI-compatible 3-wire bus. Use Value: Enables field-upgradable calibration without firmware reflash; 1M endurance supports >1000 factory calibrations per unit. | Use Scenario: Retaining I/O mapping, ladder logic scan time settings, and alarm thresholds in modular programmable logic controllers. IC Role / Device Role / Timing Role: System configuration EEPROM accessed during cold start and hot backup; tolerant of 2.7–5.5V supply variation across PLC power rails. Use Value: Ensures deterministic startup behavior after power loss; 100-year retention guarantees configuration integrity over equipment lifetime. |
| Automotive Body Controller NVM | Medical Device Usage Log |
Use Scenario: Recording door lock actuation count, mirror position presets, and lighting dimming profiles in automotive body control modules. IC Role / Device Role / Timing Role: Automotive-grade serial EEPROM interfacing with 8-bit/16-bit MCUs; operates reliably at −40°C to +85°C under hood conditions. Use Value: Meets AEC-Q100 Grade 2 requirements; 4K-bit capacity stores >200 unique user preferences with CRC-protected integrity. | Use Scenario: Logging sterilization cycles, usage hours, and error codes in portable infusion pumps and diagnostic analyzers. IC Role / Device Role / Timing Role: Tamper-resistant, long-life data logger storing critical operational history; accessed only during maintenance mode via secure MCU interface. Use Value: Complies with IEC 62304 safety requirements; 1M write cycles support >27 years of daily logging at 100 entries/day. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95M04-DRMN6TP/K | 4-Mbit SPI interface (4-wire), 5V-only operation (4.5–5.5V), no ORG pin for organization selection | Higher density but incompatible pinout and protocol; requires SPI master with hold/wait support | Select when migrating to SPI infrastructure and needing >4K-bit capacity; not drop-in compatible with AT93C66AY1-10YI-2.7 |
| BR24G40FJ-WE2 | I²C interface (2-wire), 1.7–5.5V supply, 4-Kbit capacity, no ORG pin, 400 kHz max clock at 1.7V | Lower pin count (5-pin SOP-J8), simpler wiring, but slower write speed (5 ms typical vs. 10 ms max) and no READY/BUSY status | Prefer for cost-sensitive, low-speed consumer applications where I²C is already present; lacks automotive qualification |
Compared with M95M04-DRMN6TP/K and BR24G40FJ-WE2, the AT93C66AY1-10YI-2.7 uniquely combines 3-wire simplicity, hardware-selectable organization, AEC-Q100 compliance, and deterministic READY/BUSY signaling - making it optimal for resource-constrained automotive and industrial controllers requiring robust, low-overhead NVM.
Availability
AT93C66AY1-10YI-2.7 is available at Aetrix Electronics and suitable for motor control calibration storage, industrial PLC configuration memory, and automotive body controller NVM requiring stable component supply across extended product lifecycles.
Supply support for AT93C66AY1-10YI-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 memory solutions, with a focus on embedded control and connectivity.
The AT93C66A series belongs to Microchip's legacy serial EEPROM product line, designed specifically for automotive, industrial, and consumer applications demanding reliable, low-voltage, pin-efficient nonvolatile storage with minimal host resource usage.
FAQ
What is the memory organization of AT93C66AY1-10YI-2.7 and how is it configured?
The AT93C66AY1-10YI-2.7 offers user-selectable 4-kbit organization: 512 × 8 bits or 256 × 16 bits. Configuration is determined by the ORG pin voltage - tied to VCC for x8 mode, grounded for x16 mode. If left unconnected, the internal 1 MΩ pull-up selects x16 mode. This hardware-selectable flexibility eliminates firmware dependency for memory layout decisions.
Does AT93C66AY1-10YI-2.7 support READY/BUSY status reporting during write operations?
Yes, AT93C66AY1-10YI-2.7 provides READY/BUSY status via the DO pin. When CS is brought high after initiating a write cycle and held low for ≥250 ns (tCS), DO outputs logic '0' during programming and transitions to logic '1' upon completion. This allows the host MCU to poll status without fixed delays, improving system responsiveness and reducing firmware complexity.
What package type is used for AT93C66AY1-10YI-2.7 and what are its key mechanical dimensions?
AT93C66AY1-10YI-2.7 uses the 8-lead Miniature Array Package (MAP), designated 8Y1. Its body measures 4.90 mm × 3.00 mm with 0.65 mm lead pitch. The package is lead-free/halogen-free, RoHS-compliant, and optimized for high-density SMT assembly in automotive and industrial PCBs where space and thermal performance are critical.
Is AT93C66AY1-10YI-2.7 qualified for automotive applications?
Yes, AT93C66AY1-10YI-2.7 is automotive-grade qualified per AEC-Q100 with operating temperature range −40°C to +85°C. It undergoes rigorous stress testing including temperature cycling, humidity bias, and ESD qualification. The "YI" suffix denotes industrial temperature grade with lead-free/halogen-free construction, meeting requirements for body electronics, ADAS sensors, and powertrain subsystems.
How does the write protection mechanism work on AT93C66AY1-10YI-2.7?
AT93C66AY1-10YI-2.7 uses an instruction-based Erase/Write Enable/Disable (EWEN/EWDS) protocol. Power-on default is EWDS state - all programming instructions (WRITE, ERASE, etc.) are blocked until EWEN is issued. After programming, EWDS must be executed to re-lock the device. This prevents unintended writes due to noise, reset glitches, or software errors, ensuring data integrity in harsh environments.
AT93C66AY1-10YI-2.7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not 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-MAP (3x4.9)
AT93C66AY1-10YI-2.7 FAQ
1.How can I place an order for AT93C66AY1-10YI-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C66AY1-10YI-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 AT93C66AY1-10YI-2.7 reliable?
The price and inventory of AT93C66AY1-10YI-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 AT93C66AY1-10YI-2.7 is usually 5 days.
3.What payment methods are accepted for AT93C66AY1-10YI-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C66AY1-10YI-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C66AY1-10YI-2.7?
AT93C66AY1-10YI-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C66AY1-10YI-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 AT93C66AY1-10YI-2.7?
For technical support, including AT93C66AY1-10YI-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C66AY1-10YI-2.7 requirements.
6.How does Aetrix verify that AT93C66AY1-10YI-2.7 is sourced from the original manufacturer or authorized distributors?
All AT93C66AY1-10YI-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 AT93C66AY1-10YI-2.7 meets industry standards.
7.What is the process for return or replacement of AT93C66AY1-10YI-2.7?
All AT93C66AY1-10YI-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C66AY1-10YI-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 AT93C66AY1-10YI-2.7 part is unused and in its original packaging.
Return procedure for AT93C66AY1-10YI-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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