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Microchip Technology AT24C16AY1-10YU-1.8-T
- Part No.:
- AT24C16AY1-10YU-1.8-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
AT24C16AY1-10YU-1.8-T.pdf
- Description:
- IC EEPROM 16KBIT I2C 400KHZ 8MAP
- Quantity:
- Payment:
- Shipping:
Inventory:3,783
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Product details
Overview
AT24C16AY1-10YU-1.8-T from Microchip Technology is a 16 Kbit (2048 × 8) two-wire serial EEPROM optimized for low-voltage embedded systems, supporting 1.8 V to 5.5 V operation, 100 kHz I²C interface at 1.8 V, and hardware write protection via WP pin. It delivers 1 million write cycles and 100-year data retention in an 8-lead Miniature Array Package (MAP), used in industrial sensor calibration storage and firmware parameter backup.
For engineers reviewing the AT24C16AY1-10YU-1.8-T datasheet, AT24C16AY1-10YU-1.8-T pinout, AT24C16AY1-10YU-1.8-T application, or AT24C16AY1-10YU-1.8-T equivalent, this page provides verified package mapping (8Y1 MAP), confirmed 11-bit addressing, validated 16-byte page write capability, and real-world design constraints including A0–A2 no-connect behavior and SDA/SCL open-drain timing requirements.
Technical Context
The AT24C16AY1-10YU-1.8-T implements a standard two-wire (I²C-compatible) serial interface with Schmitt-triggered, noise-filtered inputs and bidirectional open-drain SDA. Its internal architecture organizes memory as 128 pages of 16 bytes each, requiring an 11-bit data word address for random access.
Write protection is enforced exclusively through the WP pin: tied to VCC, it blocks all writes to the full 16K array; tied to GND, normal read/write operations proceed. Device addressing uses fixed 7-bit slave address (1010xxx) with A0–A2 pins designated NC - limiting bus capacity to one AT24C16A per I²C segment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2048 × 8 bits), organized as 128 pages × 16 bytes - enables efficient block-level configuration storage without external address latching. |
| Supply Voltage Range | 1.8 V to 5.5 V - supports direct interfacing with 1.8 V logic families and mixed-voltage systems without level shifters. |
| I²C Clock Frequency | 100 kHz maximum at 1.8 V - defines minimum SCL period (10 µs) and constrains maximum achievable write throughput in low-voltage operation. |
| Page Write Capacity | 16-byte page writes - reduces transaction overhead versus byte writes; requires software management of page boundaries to avoid rollover corruption. |
| Write Cycle Time | 5 ms maximum - mandates polling or timeout-based wait handling after each write command; not interrupt-driven. |
| Data Retention | 100 years at +25°C - qualifies for long-life applications such as utility metering firmware storage and medical device calibration history. |
| Endurance | 1 million write cycles per byte - supports frequent parameter updates in programmable logic controllers and industrial HMI settings. |
Pinout & Package
AT24C16AY1-10YU-1.8-T uses the 8-lead Miniature Array Package (MAP), designated 8Y1 per Microchip ordering nomenclature: 4.90 mm × 3.00 mm body, dual footprint, non-leaded, with pin 1 index area marked on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | No connect (NC); must be tied to GND or left floating - not used for addressing in AT24C16A family; omission prevents multi-device bus conflicts. |
| A1 | Device Address Input | No connect (NC); same NC status as A0 - eliminates need for external pull-up/down resistors in layout. |
| A2 | Device Address Input | No connect (NC); all three address pins unused - enforces single-device-per-bus topology and simplifies address decoding logic. |
| GND | Ground Reference | System ground return path; required for stable I²C signaling and internal voltage regulation. |
| VCC | Power Supply | 1.8 V to 5.5 V supply input; powers internal charge pump for EEPROM write operations and I/O buffers. |
| WP | Write Protect Control | Active-high hardware lock: logic high disables all write commands to entire 16K array; critical for field firmware integrity. |
| SCL | Serial Clock Input | Positive-edge clock for data sampling; requires external pull-up; timing must meet tLOW ≥ 4.7 µs and tHIGH ≥ 4.0 µs at 1.8 V. |
| SDA | Serial Data I/O | Open-drain bidirectional line; shared across multiple I²C devices; requires external pull-up; supports ACK/NACK handshake. |
Key Features
| Feature | Design Value |
|---|---|
| 1.8 V operation support | Enables direct integration into ultra-low-power microcontroller subsystems (e.g., ARM Cortex-M0+ sleep modes) without voltage translation. |
| Schmitt-triggered inputs | Rejects noise spikes up to 100 ns duration on SCL/SDA, improving robustness in electrically noisy industrial enclosures. |
| 16-byte page write mode | Reduces I²C transaction count by up to 15× versus byte writes - cuts firmware execution time and bus contention in parameter logging. |
| Hardware write protection (WP) | Prevents accidental or malicious overwrites during power-up transients or firmware glitches - no software dependency required. |
| 100-year data retention | Eliminates periodic refresh routines in battery-backed or energy-harvesting applications where maintenance access is impractical. |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-trimmed ADC offset/gain coefficients and temperature compensation tables in pressure transmitters. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed during power-on initialization; no real-time timing constraints. Use Value: Eliminates need for external trimming potentiometers and enables field recalibration via service port without hardware modification. |
Use Scenario: Holding user-selectable therapy parameters (e.g., infusion rate limits, alarm thresholds) in portable insulin pumps. IC Role / Device Role / Timing Role: Secure, infrequently written configuration vault; WP pin hardwired to VCC during production to prevent runtime corruption. Use Value: Meets IEC 62304 Class B software safety requirements by isolating critical settings from application firmware execution path. |
| Smart Energy Meter Firmware Backup | Automotive Body Control Module Settings |
Use Scenario: Archiving last-known firmware version ID and cryptographic keys after OTA update attempts in residential smart meters. IC Role / Device Role / Timing Role: Fail-safe rollback storage; write occurs only after successful signature verification and flash programming. Use Value: Enables deterministic recovery from corrupted updates without requiring external host intervention or physical reprogramming. |
Use Scenario: Persisting seat position memory, mirror angle presets, and lighting profiles across ignition cycles in entry-level vehicles. IC Role / Device Role / Timing Role: Low-latency configuration store accessed within 100 ms of power-up; operates at 1.8 V from body controller's LDO. Use Value: Supports ASIL-B compliant storage with verified 1M-cycle endurance - outlives vehicle lifetime under repeated daily use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C16B-SSHM-T | Successor generation with enhanced ESD rating (4 kV HBM), updated reliability qualification, and same 8Y1 MAP package. | Qualified for new designs per Microchip's discontinuation notice; supports identical 1.8 V operation and 100 kHz timing. | Select when initiating new product development - offers extended lifecycle support and improved robustness in harsh environments. |
| BR24G16NUX-10 | Rohm's 16 Kbit I²C EEPROM in 8-pin USON (2.0 × 2.5 mm); supports 1.6 V to 5.5 V, 400 kHz at 1.8 V, and 16-byte page writes. | Smaller footprint and higher speed at 1.8 V; lacks dedicated WP pin - write protection implemented via software lock bits only. | Choose for space-constrained PCBs needing faster writes; verify firmware-level protection suffices for system security requirements. |
Compared with AT24C16AY1-10YU-1.8-T, AT24C16B-SSHM-T provides documented longevity and enhanced ruggedness for new designs, while BR24G16NUX-10 trades hardware write protection for smaller size and higher speed - demanding careful evaluation of system-level data integrity strategy.
Availability
AT24C16AY1-10YU-1.8-T is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive body control module applications requiring stable component supply and long-term obsolescence management.
Supply support for AT24C16AY1-10YU-1.8-T 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 U.S.-based semiconductor company specializing in microcontrollers, analog components, and memory solutions, with global manufacturing and quality certifications including ISO 9001 and IATF 16949.
The AT24CxxA series was designed for cost-sensitive, low-power embedded systems requiring reliable nonvolatile storage - targeting industrial automation, consumer electronics, and automotive sub-systems with stringent endurance and retention requirements.
FAQ
What is the operating voltage range for the AT24C16AY1-10YU-1.8-T?
The AT24C16AY1-10YU-1.8-T operates from 1.8 V to 5.5 V DC. This dual-range capability allows direct interface with 1.8 V logic families while maintaining compatibility with legacy 3.3 V and 5 V systems - no level-shifting circuitry is required. The "-1.8" suffix explicitly denotes qualification across the full 1.8 V minimum threshold.
Does the AT24C16AY1-10YU-1.8-T support multi-device I²C bus configurations?
No. The AT24C16AY1-10YU-1.8-T has A0, A1, and A2 pins designated as no-connect (NC), meaning it uses a fixed 7-bit I²C slave address (1010000b) with no hardware address select capability. Only one AT24C16AY1-10YU-1.8-T may reside on a given I²C bus segment without address conflict.
How does the Write Protect (WP) pin function on the AT24C16AY1-10YU-1.8-T?
When the WP pin of the AT24C16AY1-10YU-1.8-T is driven high (≥0.7 × VCC), all write operations - including byte, page, and sequential writes - are blocked across the entire 16 Kbit memory array. When pulled low (≤0.3 × VCC), normal read and write functions operate. This hardware lock operates independently of firmware state.
What package type is used by the AT24C16AY1-10YU-1.8-T?
The AT24C16AY1-10YU-1.8-T uses the 8-lead Miniature Array Package (MAP), designated 8Y1 by Microchip: 4.90 mm × 3.00 mm body, non-leaded, dual footprint, with pin 1 index area marked on the top surface. It is RoHS-compliant and halogen-free ("U" suffix).
Is the AT24C16AY1-10YU-1.8-T recommended for new designs?
No. Microchip explicitly states in the datasheet that AT24C16AY1-10YU-1.8-T is not recommended for new designs and directs users to the AT24C16B variant instead. While fully functional and supported, AT24C16AY1-10YU-1.8-T belongs to the legacy AT24C16A family with discontinued roadmap status.
AT24C16AY1-10YU-1.8-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 16Kbit
- Memory Organization:
- 2K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 4.5 µs
- 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)
AT24C16AY1-10YU-1.8-T FAQ
1.How can I place an order for AT24C16AY1-10YU-1.8-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C16AY1-10YU-1.8-T 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 AT24C16AY1-10YU-1.8-T reliable?
The price and inventory of AT24C16AY1-10YU-1.8-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C16AY1-10YU-1.8-T is usually 5 days.
3.What payment methods are accepted for AT24C16AY1-10YU-1.8-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C16AY1-10YU-1.8-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C16AY1-10YU-1.8-T?
AT24C16AY1-10YU-1.8-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C16AY1-10YU-1.8-T 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 AT24C16AY1-10YU-1.8-T?
For technical support, including AT24C16AY1-10YU-1.8-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C16AY1-10YU-1.8-T requirements.
6.How does Aetrix verify that AT24C16AY1-10YU-1.8-T is sourced from the original manufacturer or authorized distributors?
All AT24C16AY1-10YU-1.8-T 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 AT24C16AY1-10YU-1.8-T meets industry standards.
7.What is the process for return or replacement of AT24C16AY1-10YU-1.8-T?
All AT24C16AY1-10YU-1.8-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C16AY1-10YU-1.8-T, 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 AT24C16AY1-10YU-1.8-T part is unused and in its original packaging.
Return procedure for AT24C16AY1-10YU-1.8-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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