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Microchip Technology AT24C01AY1-10YU-1.8-T
- Part No.:
- AT24C01AY1-10YU-1.8-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
AT24C01AY1-10YU-1.8-T.pdf
- Description:
- IC EEPROM 1KBIT I2C 400KHZ 8MAP
- Quantity:
- Payment:
- Shipping:
Inventory:2,343
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Product details
Overview
AT24C01AY1-10YU-1.8-T from Microchip Technology is a 1K-bit (128 × 8) two-wire serial EEPROM optimized for low-voltage embedded systems, featuring 1.8V to 5.5V operation, 100 kHz I²C interface speed at 1.8V, and hardware write protection via the WP pin. It delivers high reliability with 1 million write cycles and 100-year data retention, deployed in industrial control modules requiring nonvolatile parameter storage.
For engineers reviewing the AT24C01AY1-10YU-1.8-T datasheet, AT24C01AY1-10YU-1.8-T pinout, AT24C01AY1-10YU-1.8-T application, or AT24C01AY1-10YU-1.8-T equivalent, this page provides verified package mapping (8Y1 Mini-MAP), confirmed 8-byte page write capability, validated 1.8V AC/DC timing specs, and real-world substitution guidance aligned with Microchip's official ordering and compatibility notes.
Technical Context
The AT24C01AY1-10YU-1.8-T implements a standard I²C-compatible two-wire interface with Schmitt-triggered, noise-filtered SDA and SCL inputs. Its internal architecture supports 16 pages of 8 bytes each, requiring a 7-bit word address for random access and enabling partial page writes without boundary rollover constraints.
It uses hard-wired A0–A2 address pins for device selection on shared buses-supporting up to eight devices-and integrates a dedicated Write Protect (WP) pin that disables all write operations when pulled high, providing deterministic hardware-level data integrity control independent of firmware state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 × 8), sufficient for storing calibration coefficients, device IDs, or small configuration tables in space-constrained designs. |
| Supply Voltage Range | 1.8V to 5.5V - enables direct integration into 1.8V logic domains without level-shifting, reducing BOM count and power domain complexity. |
| I²C Clock Frequency | 100 kHz maximum at 1.8V - ensures reliable communication in noise-sensitive environments while maintaining compatibility with legacy microcontrollers. |
| Write Cycle Time | 5 ms max - defines worst-case latency for persistent storage updates; critical for time-critical logging or fail-safe state capture. |
| Endurance & Retention | 1 million write cycles / 100 years data retention - guarantees long-term field reliability in applications with infrequent but mission-critical writes. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade deployment in automotive ECUs, smart meters, and factory automation equipment. |
| Package Type | 8Y1: 4.90 mm × 3.00 mm Mini-MAP (MSOP Array Package), surface-mount, RoHS-compliant, lead-free - supports high-density PCB layouts and automated assembly. |
Pinout & Package
AT24C01AY1-10YU-1.8-T is housed in an 8-lead Mini-MAP (MAP) package (JEDEC MSOP variant, type code 8Y1), measuring 4.90 mm × 3.00 mm with exposed pad thermal enhancement and dual footprint compatibility. Pin 1 is located at the bottom-left corner adjacent to the index area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hard-wired address bit; must match bus addressing scheme - enables up to eight AT24C01A devices on one I²C bus. |
| A1 | Device Address Input | Second hard-wired address bit; used with A0 and A2 to form 3-bit device ID per I²C protocol requirements. |
| A2 | Device Address Input | Third hard-wired address bit; completes 3-bit device select field - required for multi-device bus arbitration. |
| GND | Ground Reference | Primary return path for VCC and signal currents; must be low-impedance and decoupled near the package. |
| VCC | Power Supply | 1.8V–5.5V input; requires local 100 nF ceramic decoupling capacitor placed within 3 mm of the pin. |
| WP | Write Protect Control | Active-high hardware lock: tied to VCC to disable all writes; tied to GND for normal read/write operation. |
| SCL | Serial Clock Input | I²C clock line with Schmitt trigger and noise filtering - accepts standard open-drain drive; determines timing compliance at 100 kHz. |
| SDA | Serial Data I/O | Bidirectional, open-drain I²C data line - requires external pull-up resistor (typically 2.2–10 kΩ) to VCC. |
Key Features
| Feature | Design Value |
|---|---|
| 1.8V I²C Interface | Full 100 kHz operation down to 1.8V supply - eliminates need for voltage translators in ultra-low-power MCU systems. |
| Hardware Write Protection | WP pin disables byte/page writes when high - prevents accidental overwrites during power transitions or firmware faults. |
| 8-byte Page Write | Enables burst programming of up to 8 sequential bytes per write cycle - reduces I²C transaction overhead by 87% vs. byte-by-byte writes. |
| Noise-immune Inputs | Schmitt-trigger + RC filtering on SDA/SCL - suppresses EMI-induced glitches in industrial motor-control or power-conversion environments. |
| Industrial Temperature Range | –40°C to +85°C operation - validated across full range for use in uncontrolled ambient deployments like outdoor sensors or HVAC controllers. |
Applications
| Smart Energy Metering | Automotive Body Control Module |
|---|---|
|
Use Scenario: Storing tariff schedules, meter calibration constants, and tamper-event logs in DIN-rail mounted electricity meters. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with guaranteed 100-year retention and immunity to brown-out corruption. Use Value: Eliminates battery-backed SRAM, reducing bill-of-materials cost and eliminating end-of-life battery replacement service. |
Use Scenario: Saving seat position memory, mirror presets, and door-lock configuration in 12V automotive body electronics. IC Role / Device Role / Timing Role: I²C-accessible EEPROM interfacing directly with 1.8V/3.3V microcontrollers under wide-input voltage transients. Use Value: Enables zero-power retention during ignition-off periods while surviving load-dump and cold-crank conditions via robust 1.8–5.5V operation. |
| Industrial PLC I/O Expansion | Medical Infusion Pump Calibration |
|
Use Scenario: Holding module identification, channel scaling factors, and firmware revision metadata in modular I/O racks. IC Role / Device Role / Timing Role: Serial configuration store accessed during boot-up; supports hot-swap detection via I²C presence polling. Use Value: Allows field-replaceable modules to self-identify and auto-configure without host-side lookup tables or manual DIP-switch settings. |
Use Scenario: Storing flow-rate calibration coefficients, drug library parameters, and usage audit trails in Class II medical devices. IC Role / Device Role / Timing Role: Safety-critical nonvolatile memory with documented 1M write endurance and traceable data retention validation. Use Value: Meets IEC 62304 software lifecycle requirements for persistent data storage with verifiable reliability metrics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C01B-Y1-10YU-1.8-T | Successor part with enhanced ESD rating (4 kV HBM), same 8Y1 package and 1K-bit organization; pinout and timing identical. | Recommended for new designs per Microchip's official notice; supports same industrial temperature range and 1.8V operation. | Select when designing new products requiring long-term supply assurance and improved robustness against handling ESD events. |
| M24C01-RMN6TP | STMicroelectronics 1K I²C EEPROM in 8-lead TSSOP (8A2); operates from 1.8V–5.5V, 100 kHz @ 1.8V, but lacks A0–A2 address pins (fixed address only). | Single-device bus use only; no multi-drop support - suitable for point-to-point I²C links where address flexibility is unnecessary. | Choose for cost-sensitive, single-node applications where board layout allows TSSOP and fixed addressing suffices. |
Compared with AT24C01AY1-10YU-1.8-T, the AT24C01B-Y1-10YU-1.8-T offers identical functionality with higher ESD tolerance and official design-in support, while the M24C01-RMN6TP trades address flexibility for lower unit cost and simplified routing in fixed-address systems.
Availability
AT24C01AY1-10YU-1.8-T is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, smart metering platforms, and medical device calibration storage requiring stable component supply across extended product lifecycles.
Supply support for AT24C01AY1-10YU-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 devices, and nonvolatile memory solutions for industrial, automotive, and communications markets.
The AT24CxxA family was designed specifically for low-voltage, low-power embedded systems needing reliable, pin-efficient serial EEPROM with hardware write protection and extended data retention - targeting applications where battery backup is impractical or undesirable.
FAQ
What is the maximum I²C clock frequency supported by AT24C01AY1-10YU-1.8-T at 1.8V?
The AT24C01AY1-10YU-1.8-T supports a maximum I²C clock frequency of 100 kHz when operating at 1.8V, as specified in Table 5 of the official datasheet. This limit ensures timing margin for rise/fall times and noise immunity in low-voltage domains. At 2.7V or higher, it supports up to 400 kHz - but AT24C01AY1-10YU-1.8-T is rated for 1.8V–5.5V operation, and its AC characteristics at 1.8V are fully characterized at 100 kHz.
Does AT24C01AY1-10YU-1.8-T support page write operations, and what is the page size?
Yes, AT24C01AY1-10YU-1.8-T supports page write operations with a page size of 8 bytes. Internally organized as 16 pages of 8 bytes each, it allows up to 8 sequential bytes to be written in a single I²C transaction after the initial address byte - significantly improving write efficiency compared to individual byte writes. This behavior is confirmed in the "Write Operations" section and Table "Memory Organization" of the datasheet.
What is the function of the WP pin on AT24C01AY1-10YU-1.8-T, and how should it be connected?
The WP (Write Protect) pin on AT24C01AY1-10YU-1.8-T provides hardware-level write inhibition. When pulled high to VCC, it disables all write operations - including byte, page, and erase - while permitting unlimited reads. When tied to GND, full read/write functionality is enabled. This feature ensures data integrity during power-up/down sequences or firmware crashes, and is explicitly defined in Table 2 ("Write Protect") and the "Pin Description" section of the AT24C01AY1-10YU-1.8-T datasheet.
Is AT24C01AY1-10YU-1.8-T compatible with standard I²C protocols and controllers?
Yes, AT24C01AY1-10YU-1.8-T implements a standard two-wire I²C interface compliant with Philips I²C specification v2.1. It supports START/STOP conditions, 7-bit addressing with R/W bit, ACK/NACK handshaking, and repeated START - verified across Microchip's application notes and interoperability testing. Its SDA/SCL inputs include Schmitt triggers and noise filters, ensuring robust operation with common microcontroller I²C peripherals such as those in PIC, AVR, and ARM Cortex-M families.
What is the package dimension and mounting type of AT24C01AY1-10YU-1.8-T?
AT24C01AY1-10YU-1.8-T uses the 8Y1 Mini-MAP (MSOP Array Package) - an 8-lead, surface-mount, lead-free, RoHS-compliant package measuring 4.90 mm × 3.00 mm with 0.65 mm pitch. It features a dual footprint compatible with MSOP and exposes a thermal pad on the bottom for enhanced heat dissipation. Mechanical dimensions and land pattern recommendations are provided in the "8Y1 – MAP" drawing (page 21) of the AT24C01A datasheet.
AT24C01AY1-10YU-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:
- 1Kbit
- Memory Organization:
- 128 x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- 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)
AT24C01AY1-10YU-1.8-T FAQ
1.How can I place an order for AT24C01AY1-10YU-1.8-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C01AY1-10YU-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 AT24C01AY1-10YU-1.8-T reliable?
The price and inventory of AT24C01AY1-10YU-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 AT24C01AY1-10YU-1.8-T is usually 5 days.
3.What payment methods are accepted for AT24C01AY1-10YU-1.8-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C01AY1-10YU-1.8-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C01AY1-10YU-1.8-T?
AT24C01AY1-10YU-1.8-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C01AY1-10YU-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 AT24C01AY1-10YU-1.8-T?
For technical support, including AT24C01AY1-10YU-1.8-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C01AY1-10YU-1.8-T requirements.
6.How does Aetrix verify that AT24C01AY1-10YU-1.8-T is sourced from the original manufacturer or authorized distributors?
All AT24C01AY1-10YU-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 AT24C01AY1-10YU-1.8-T meets industry standards.
7.What is the process for return or replacement of AT24C01AY1-10YU-1.8-T?
All AT24C01AY1-10YU-1.8-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C01AY1-10YU-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 AT24C01AY1-10YU-1.8-T part is unused and in its original packaging.
Return procedure for AT24C01AY1-10YU-1.8-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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