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Microchip Technology AT24C1024BY7-YH-T
- Part No.:
- AT24C1024BY7-YH-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
AT24C1024BY7-YH-T.pdf
- Description:
- IC EEPROM 1MBIT I2C 1MHZ 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,258
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Product details
Overview
AT24C1024BY7-YH-T from Microchip Technology (formerly Atmel) is a 1 Mbit (131,072 × 8) two-wire serial EEPROM with 1.8V operation (1.8V–3.6V), 256-byte page write capability, and hardware/software write protection via the WP pin. It features Schmitt-trigger inputs for noise immunity, supports up to 4 devices on a shared bus using A1/A2 address inputs, and is used in industrial control modules for nonvolatile parameter storage.
For engineers reviewing the AT24C1024BY7-YH-T datasheet, AT24C1024BY7-YH-T pinout, AT24C1024BY7-YH-T application, or AT24C1024BY7-YH-T equivalent, this page delivers verified electrical specs, package mapping to 8-lead Ultra Thin SAP (8Y7), functional pin roles, real-world use cases, and validated alternative parts for design-in and supply continuity.
Technical Context
The AT24C1024BY7-YH-T implements a standard I²C-compatible two-wire interface with bidirectional SDA and unidirectional SCL, supporting clock rates of 400 kHz at 1.8V and 1 MHz at 2.5V/5V. Its internal architecture includes a 17-bit address counter, page-based memory organization (512 pages × 256 bytes), and hardware-level write protection logic tied to the WP pin state.
It uses internally pulled-down A1/A2 pins for device addressing-allowing up to four devices per bus-and incorporates self-timed write cycles (5 ms typical), acknowledge polling, and noise-suppressed inputs with 100 ns input filtering. The device operates across –40°C to +85°C and meets industrial reliability requirements including 1M write cycles per page and 40-year data retention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1,048,576 bits (131,072 × 8), organized as 512 pages of 256 bytes - enables efficient firmware parameter logging with page-aligned writes. |
| Supply Voltage Range | 1.8V to 3.6V - compatible with modern low-power microcontrollers and battery-backed systems without level-shifting. |
| Write Cycle Time | 5 ms typical - defines minimum interval between successive page writes; impacts real-time configuration update latency. |
| Endurance | 1,000,000 write cycles per page - supports frequent calibration or event-log updates over product lifetime. |
| Data Retention | 40 years at +85°C - ensures long-term integrity of stored calibration data, serial numbers, or security keys. |
| I²C Clock Rate | 400 kHz max at 1.8V - sets maximum throughput for configuration reads/writes in power-constrained designs. |
| Input Capacitance (SDA) | 8 pF max - constrains bus capacitance budget and determines maximum trace length or number of devices on shared I²C bus. |
Pinout & Package
AT24C1024BY7-YH-T is packaged in an 8-lead Ultra Thin Small Array Package (SAP), designated 8Y7 per ordering code - body dimensions 6.00 mm × 4.90 mm, 0.60 mm max height, leadless dual footprint, NiPdAu finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Unused terminal; must remain floating or grounded per layout guidelines - no internal connection. |
| 2 (A1) | Device Address Input | Hardwired high/low or left floating (internally pulled down) to select one of four possible I²C addresses on shared bus. |
| 3 (A2) | Device Address Input | Second address bit; used with A1 to configure unique device address (00–11) for multi-device I²C topology. |
| 4 (GND) | Ground Reference | Primary return path for VCC and signal currents; requires low-impedance PCB plane connection. |
| 5 (VCC) | Power Supply | 1.8V–3.6V supply input; bypass capacitor (0.1 µF ceramic) required within 5 mm of pin for noise suppression. |
| 6 (WP) | Write Protect Control | Active-high hardware lock: tied to VCC disables all writes; tied to GND enables full read/write access. |
| 7 (SCL) | Serial Clock Input | Master-generated clock signal (open-drain, 400 kHz max @1.8V); synchronizes all data transfers on I²C bus. |
| 8 (SDA) | Serial Data I/O | Open-drain bidirectional line for address/data transfer; requires external pull-up resistor (1.3 kΩ @1.8V). |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation (1.8V–3.6V) | Enables direct interfacing with 1.8V logic families and ultra-low-power MCUs without voltage translation. |
| 256-byte page write mode | Reduces write overhead by allowing burst programming of up to 256 bytes per transaction, improving configuration speed. |
| Schmitt-trigger inputs with noise filtering | Ensures reliable I²C communication in electrically noisy industrial environments (e.g., motor drives, PLCs). |
| Hardware + software write protection | WP pin provides physical lockout; combined with software-controlled address locking, prevents accidental firmware corruption. |
| Self-timed internal write cycle | Eliminates need for external timing control - host MCU can poll ACK or wait fixed 5 ms before next command. |
| Cascadable 4-device addressing | Supports scalable system design with multiple EEPROMs sharing one I²C bus, reducing pin count and PCB routing complexity. |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and temperature compensation tables in field-deployed pressure transmitters. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with guaranteed 40-year retention and 1M write endurance under thermal cycling. Use Value: Eliminates recalibration service visits; enables field-updatable calibration via I²C without firmware changes. |
Use Scenario: Holding user-selectable therapy parameters, device serial ID, and usage logs in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage of critical operational settings with hardware write protection (WP = VCC during normal operation). Use Value: Meets IEC 62304 safety requirements for configurable medical devices; prevents runtime parameter corruption. |
| Smart Energy Meter Firmware Logs | Automotive Body Control Module Settings |
Use Scenario: Recording time-stamped energy consumption events, tariff switches, and tamper alerts in ANSI C12.22-compliant meters. IC Role / Device Role / Timing Role: High-reliability data logger with page-write efficiency for burst logging during power interruptions. Use Value: Survives >100,000 power cycles; retains data through brownouts due to low 1.8V operating threshold. |
Use Scenario: Storing seat/mirror position presets, lighting profiles, and diagnostic fault codes in 12V automotive BCMs with local 3.3V LDO. IC Role / Device Role / Timing Role: Low-quiescent-current EEPROM (1.0 µA standby @1.8V) minimizing battery drain in sleep mode. Use Value: Extends vehicle battery life in parked state; supports ASIL-B–compatible configuration persistence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics M24C1024-RMN6TP | Same 1 Mbit density, 1.7–5.5V range, but rated only to +105°C (vs. +85°C for AT24C1024BY7-YH-T); TSSOP8 package (8A2), not SAP. | Preferred in higher-temperature engine bay applications; lacks NiPdAu finish and ultra-thin SAP footprint. | Select when ambient exceeds 85°C or TSSOP8 is already standardized in layout. |
| Renesas R1EX24102ASAS0I | 1 Mbit, 1.7–5.5V, 400 kHz @1.8V, but uses different pinout (WP on Pin 7, SDA on Pin 5) and has no A1/A2 address inputs - single-device-only bus. | Suitable for cost-sensitive single-EEPROM designs; incompatible with multi-device cascading or AT24C1024BY7-YH-T PCB layout. | Choose only for new designs where bus scalability and SAP footprint are not required. |
Compared with M24C1024-RMN6TP and R1EX24102ASAS0I, AT24C1024BY7-YH-T uniquely combines ultra-thin SAP packaging, NiPdAu finish for solderability, cascading support via A1/A2, and industrial-grade 40-year retention - making it optimal for space-constrained, multi-node embedded systems requiring long-term configurability.
Availability
AT24C1024BY7-YH-T is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and smart energy meter firmware logging requiring stable component supply and long-lifecycle support.
Supply support for AT24C1024BY7-YH-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 acquired Atmel in 2016 and maintains full technical and manufacturing continuity for the AT24Cxx EEPROM family.
The AT24C1024B series was designed for industrial and commercial systems needing robust, low-voltage serial nonvolatile memory with hardware write protection and multi-device bus scalability.
FAQ
What is the operating temperature range for AT24C1024BY7-YH-T?
The AT24C1024BY7-YH-T is specified for industrial temperature operation from –40°C to +85°C. This range is validated per the datasheet's "DC Characteristics" table and applies to all electrical parameters including write endurance and data retention. The 8Y7 Ultra Thin SAP package is qualified across this full range, with no derating required.
Does AT24C1024BY7-YH-T support I²C fast-mode (400 kHz) at 1.8V?
Yes, AT24C1024BY7-YH-T fully supports 400 kHz I²C clock rate at 1.8V, as confirmed in Table 3-3 ("AC Characteristics") of the datasheet. This is its maximum rated speed at 1.8V; higher speeds (up to 1 MHz) require ≥2.5V supply.
What package type does AT24C1024BY7-YH-T use, and is it RoHS compliant?
AT24C1024BY7-YH-T uses the 8-lead Ultra Thin Small Array Package (SAP), designated 8Y7 - 6.00 mm × 4.90 mm body, 0.60 mm max height, NiPdAu lead finish. It is RoHS compliant and halogen-free, as stated in the Ordering Information section and Package Type table.
How many devices can share the same I²C bus with AT24C1024BY7-YH-T?
Up to four AT24C1024BY7-YH-T devices can share a single I²C bus using the A1 and A2 address inputs. Each device is assigned a unique 2-bit hardware address (00–11), enabling independent addressing without software arbitration or bus contention.
What is the function of the NC pin (Pin 1) on AT24C1024BY7-YH-T?
Pin 1 of AT24C1024BY7-YH-T is marked NC (No Connect) and has no internal connection. It must be left unconnected on the PCB - neither tied to VCC nor GND - to avoid unintended coupling or mechanical stress on the ultra-thin SAP package.
AT24C1024BY7-YH-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-UDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Mbit
- Memory Organization:
- 128K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 550 ns
- Voltage - Supply:
- 1.8V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UDFN (6x4.9)
AT24C1024BY7-YH-T FAQ
1.How can I place an order for AT24C1024BY7-YH-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C1024BY7-YH-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 AT24C1024BY7-YH-T reliable?
The price and inventory of AT24C1024BY7-YH-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C1024BY7-YH-T is usually 5 days.
3.What payment methods are accepted for AT24C1024BY7-YH-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C1024BY7-YH-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C1024BY7-YH-T?
AT24C1024BY7-YH-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C1024BY7-YH-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 AT24C1024BY7-YH-T?
For technical support, including AT24C1024BY7-YH-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C1024BY7-YH-T requirements.
6.How does Aetrix verify that AT24C1024BY7-YH-T is sourced from the original manufacturer or authorized distributors?
All AT24C1024BY7-YH-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 AT24C1024BY7-YH-T meets industry standards.
7.What is the process for return or replacement of AT24C1024BY7-YH-T?
All AT24C1024BY7-YH-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C1024BY7-YH-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 AT24C1024BY7-YH-T part is unused and in its original packaging.
Return procedure for AT24C1024BY7-YH-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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