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Microchip Technology AT93C66AY1-10YI-1.8
- Part No.:
- AT93C66AY1-10YI-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
AT93C66AY1-10YI-1.8.pdf
- Description:
- IC EEPROM 4KBIT 3-WIRE 2MHZ 8MAP
- Quantity:
- Payment:
- Shipping:
Inventory:1,895
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Product details
Overview
AT93C66AY1-10YI-1.8 from Microchip Technology (formerly Atmel) is a 4-kbit serial EEPROM with 3-wire interface, configurable as 512 × 8 or 256 × 16 organization via ORG pin, operating from 1.8V to 5.5V supply, and rated for industrial temperature (−40°C to +85°C). It delivers 2 MHz clock rate at 5V, 10 ms max self-timed write cycle, and supports sequential read for continuous data streaming in embedded control and sensor calibration applications.
For engineers reviewing the AT93C66AY1-10YI-1.8 datasheet, AT93C66AY1-10YI-1.8 pinout, AT93C66AY1-10YI-1.8 application, or AT93C66AY1-10YI-1.8 equivalent, key selection considerations include low-voltage operation down to 1.8V, user-selectable x8/x16 memory mapping, automotive-grade reliability (1M write cycles, 100-year retention), and compatibility with space-constrained PCB layouts using its 8-lead MAP package.
Technical Context
The AT93C66AY1-10YI-1.8 implements a synchronous 3-wire serial interface (CS, SK, DI/DO) with instruction-set-driven operation including READ, WRITE, ERASE, EWEN, EWDS, ERAL, and WRAL. Its internal organization is dynamically selected by the ORG pin state-logic high enables 256 × 16 mode, ground enables 512 × 8 mode-and it features READY/BUSY status reporting via DO during write/erase operations.
It operates across 1.8V–5.5V with distinct DC/AC timing specifications per voltage range: at 1.8V, SK clock frequency reaches 0.25 MHz, tSKH/tSKL ≥ 1000 ns, and standby current ISB1 ≤ 0.1 µA; write endurance is guaranteed at 1 million cycles and data retention at 100 years under industrial temperature conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4096 bits (512 × 8 or 256 × 16 configuration) |
| Supply Voltage Range | 1.8V to 5.5V - enables direct interfacing with 1.8V logic and mixed-voltage systems without level shifters |
| Interface Type | 3-wire serial (CS, SK, DI/DO) - reduces PCB routing complexity and pin count vs. SPI/I²C |
| Max Clock Frequency | 2 MHz at VCC = 5V; 0.25 MHz at VCC = 1.8V - defines maximum data throughput and timing margin in host controller design |
| Write Cycle Time | 10 ms maximum - determines minimum time between successive write commands and impacts firmware polling strategy |
| Endurance & Retention | 1 million write cycles / 100 years data retention - qualifies for long-life field deployments in industrial metering and automotive subsystems |
| Operating Temperature | −40°C to +85°C - meets industrial-grade environmental requirements without derating |
Pinout & Package
AT93C66AY1-10YI-1.8 is housed in an 8-lead Miniature Array Package (MAP), 4.90 mm × 3.00 mm body, non-leaded, dual footprint compatible with SOIC/TSSOP layouts. Pin 1 is marked by an index area on the top surface.
| 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 | Synchronous edge-triggered clock input; rising edge latches DI, falling edge samples DO; timing parameters (tSKH/tSKL) constrain host MCU GPIO toggle rate |
| DI | Data Input | Serial instruction and address/data input; accepts Start Bit (1), Op Code, Address, and Write Data; requires setup/hold timing relative to SK |
| DO | Data Output | Tri-state serial output; delivers read data, dummy bit (0), and READY/BUSY status; high-impedance when CS is high |
| VCC | Power Supply | Primary power rail (1.8–5.5V); decoupling capacitor required near pin to suppress switching noise during write cycles |
| GND | Ground | Reference return path for all signals and internal circuitry; must be low-impedance connection to minimize noise coupling into DO/SK |
| ORG | Organization Select | Configures memory map: tied to VCC → 256 × 16; tied to GND → 512 × 8; unconnected defaults to x16 (not supported on 1.8V-only variants) |
| DC | Don't Connect | No internal connection; must remain floating or tied to GND/VCC only if required by board layout; no electrical function |
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 external address decoding logic |
| Low-voltage operation (1.8V) | Full functionality at 1.8V supply - enables direct integration with ultra-low-power microcontrollers and battery-backed systems |
| Self-timed write cycle | No external erase step required; internal timing ensures reliable programming completion in ≤10 ms - simplifies firmware state machine and removes need for precise delay loops |
| Sequential read capability | Continuous data stream without reissuing address after first READ - reduces host CPU overhead and improves throughput in parameter table access |
| Automotive-grade reliability | 1M write cycles and 100-year data retention validated over −40°C to +85°C - meets AEC-Q100 stress test expectations for mission-critical storage |
Applications
| Industrial Sensor Calibration | Automotive Body Control Module |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed during power-up initialization; retains values across cold starts and brownouts. Use Value: Eliminates need for external trimming potentiometers or factory programming stations; enables field recalibration via host MCU command sequence. |
Use Scenario: Holding seat position memory, mirror angle presets, and lighting configuration in vehicle door modules. IC Role / Device Role / Timing Role: Serial configuration EEPROM interfaced to 8-bit automotive MCU via GPIO-banged 3-wire protocol. Use Value: Survives 10+ year vehicle lifecycle with repeated power cycling; withstands automotive load dump transients due to robust 1.8–5.5V operating range. |
| Medical Infusion Pump Settings | Smart Energy Meter Firmware Parameters |
Use Scenario: Persisting drug library definitions, dose limits, and alarm thresholds in Class II medical devices requiring traceable configuration history. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage element accessed only during authorized service mode; supports ERAL/WRAL for full memory reset. Use Value: Meets IEC 62304 software safety requirements through deterministic write timing and verified endurance - no hidden wear-leveling or garbage collection. |
Use Scenario: Storing tariff schedules, CT/PT ratios, and communication credentials in ANSI C12.19-compliant electricity meters. IC Role / Device Role / Timing Role: Low-power serial EEPROM powered from supercapacitor backup during mains outage; retains critical billing data. Use Value: 0.1 µA standby current at 1.8V extends backup runtime; 100-year retention ensures meter lifetime compliance without periodic refresh. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95M04-DWDW3TP/K | 4-Mbit SPI interface, 2.5–5.5V supply, 20 MHz clock, WLCSP package | Higher density and faster interface but requires SPI hardware peripheral; incompatible pinout and protocol | Select when migrating to higher-capacity storage with existing SPI infrastructure and board redesign flexibility. |
| BR24G40FJ-3GE2 | 4-kbit I²C interface, 1.7–5.5V, 400 kHz standard mode, 8-lead SOP package | Different bus protocol (I²C vs. 3-wire), no ORG pin for organization selection, lower max clock rate | Choose for designs already using I²C peripherals and where pin count allows SDA/SCL addition; verify pull-up resistor compatibility. |
Compared with M95M04-DWDW3TP/K and BR24G40FJ-3GE2, the AT93C66AY1-10YI-1.8 offers unique 3-wire simplicity and hardware-selectable memory mapping - reducing MCU GPIO usage and eliminating software address translation - while maintaining industrial temperature rating and ultra-low 1.8V operation in a compact MAP package.
Availability
AT93C66AY1-10YI-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, medical infusion pump settings, and smart energy meter firmware parameters requiring stable component supply across extended product lifecycles.
Supply support for AT93C66AY1-10YI-1.8 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 a focus on reliability, longevity, and embedded system integration.
The AT93C66A series belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, space-constrained industrial and automotive applications requiring simple 3-wire configuration storage with guaranteed endurance and wide voltage operation.
FAQ
What is the memory organization of AT93C66AY1-10YI-1.8 and how is it configured?
The AT93C66AY1-10YI-1.8 provides 4096 bits organized as either 512 × 8 or 256 × 16, selected by the ORG pin: connect ORG to VCC for x16 mode, to GND for x8 mode. This hardware-based configuration avoids firmware overhead and ensures deterministic addressing. Note that unconnected ORG defaults to x16 but is not supported on 1.8V-only variants like the AT93C66AY1-10YI-1.8 per datasheet clarification.
Does AT93C66AY1-10YI-1.8 support true 1.8V operation across all specifications?
Yes, AT93C66AY1-10YI-1.8 is fully characterized for 1.8V to 5.5V operation, including AC timing (e.g., 0.25 MHz SK frequency, 1000 ns tSKH/tSKL), DC parameters (ISB1 ≤ 0.1 µA standby), and functional instructions. All guaranteed specs in the datasheet apply across this range - no derating or reduced functionality occurs at 1.8V.
How does the READY/BUSY status work on AT93C66AY1-10YI-1.8 during write operations?
During a write cycle, AT93C66AY1-10YI-1.8 outputs READY/BUSY status on the DO pin: logic '0' indicates ongoing programming, logic '1' confirms completion. To read status, CS must be brought high after ≥250 ns low-time (tCS); DO transitions to high-impedance if CS remains low past tWP. This eliminates need for fixed delays in host firmware.
What package type is used for AT93C66AY1-10YI-1.8 and what are its key mechanical advantages?
AT93C66AY1-10YI-1.8 uses the 8-lead Miniature Array Package (MAP), measuring 4.90 mm × 3.00 mm. Its dual footprint supports drop-in replacement for SOIC/TSSOP layouts, non-leaded construction improves thermal performance and solder joint reliability, and compact size saves PCB area in dense industrial control modules.
Can AT93C66AY1-10YI-1.8 be used in automotive applications requiring AEC-Q200 compliance?
AT93C66AY1-10YI-1.8 is specified for industrial temperature (−40°C to +85°C) and carries automotive-grade reliability attributes - 1M write cycles, 100-year retention, and lead-free/halogen-free construction - but is not formally AEC-Q200 qualified. For AEC-Q200–mandated applications, Microchip's AT93C66A-10SQ-2.7 (extended temp −40°C to +125°C) is the certified variant.
AT93C66AY1-10YI-1.8 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:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MAP (3x4.9)
AT93C66AY1-10YI-1.8 FAQ
1.How can I place an order for AT93C66AY1-10YI-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C66AY1-10YI-1.8 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-1.8 reliable?
The price and inventory of AT93C66AY1-10YI-1.8 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-1.8 is usually 5 days.
3.What payment methods are accepted for AT93C66AY1-10YI-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C66AY1-10YI-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C66AY1-10YI-1.8?
AT93C66AY1-10YI-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C66AY1-10YI-1.8 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-1.8?
For technical support, including AT93C66AY1-10YI-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C66AY1-10YI-1.8 requirements.
6.How does Aetrix verify that AT93C66AY1-10YI-1.8 is sourced from the original manufacturer or authorized distributors?
All AT93C66AY1-10YI-1.8 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-1.8 meets industry standards.
7.What is the process for return or replacement of AT93C66AY1-10YI-1.8?
All AT93C66AY1-10YI-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C66AY1-10YI-1.8, 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-1.8 part is unused and in its original packaging.
Return procedure for AT93C66AY1-10YI-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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