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Microchip Technology AT24C512BY7-YH-T
- Part No.:
- AT24C512BY7-YH-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
AT24C512BY7-YH-T.pdf
- Description:
- IC EEPROM 512KBIT I2C 1MHZ 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,157
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Product details
Overview
AT24C512BY7-YH-T from Microchip Technology (formerly Atmel) is a 512 Kbit (65,536 × 8) two-wire serial EEPROM with 1.8 V operation (1.8–3.6 V), 128-byte page write capability, hardware write protection via WP pin, and Schmitt-triggered noise-suppressing inputs. It supports up to 1 MHz I²C communication at 2.5 V/5.5 V and 400 kHz at 1.8 V, and is used in industrial control modules for nonvolatile parameter storage.
For engineers reviewing the AT24C512BY7-YH-T datasheet, AT24C512BY7-YH-T pinout, AT24C512BY7-YH-T application, or AT24C512BY7-YH-T equivalent, key selection considerations include its 8-lead Ultra Thin SAP (8Y7) package, NiPdAu lead finish, 1.8 V supply range, 40-year data retention, and cascading support for up to eight devices on a shared I²C bus.
Technical Context
The AT24C512BY7-YH-T implements a standard two-wire (I²C-compatible) interface with open-drain SDA and edge-triggered SCL, supporting both byte and 128-byte page writes. Its internal address counter enables sequential reads across pages, and device addressing uses three hardware-configurable pins (A0–A2) to allow up to eight devices per bus.
It features dual-voltage design (1.8 V and 2.5 V variants), internally pulled-down A0–A2 and WP pins when floating (though external biasing is recommended), and a self-timed write cycle with 5 ms maximum duration. Endurance is rated at 1,000,000 write cycles under industrial temperature conditions (–40°C to +85°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (65,536 × 8 bits), organized as 512 pages of 128 bytes - enables efficient firmware parameter logging without external address latching. |
| Supply Voltage | 1.8 V to 3.6 V - compatible with modern low-power microcontrollers and battery-backed systems. |
| I²C Clock Frequency | 400 kHz max at 1.8 V; 1 MHz max at 2.5 V/5.5 V - supports high-speed configuration updates while maintaining noise immunity in noisy environments. |
| Write Cycle Time | 5 ms maximum - defines minimum inter-write interval; impacts real-time logging latency in time-critical applications. |
| Data Retention | 40 years at 25°C - ensures long-term reliability for unattended industrial equipment and embedded telemetry nodes. |
| Endurance | 1,000,000 write cycles - supports frequent calibration or event logging in programmable logic controllers and sensor transmitters. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade deployment in motor drives, power supplies, and factory automation hardware. |
Pinout & Package
AT24C512BY7-YH-T is packaged in an 8-lead Ultra Thin Small Array Package (SAP), designated 8Y7: 6.00 mm × 4.90 mm body, 0.50–0.70 mm height, 1.27 mm lead pitch, NiPdAu lead finish, bottom-view pin 1 index area marked.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hardwired to GND or VCC to configure one of eight possible I²C slave addresses; internally pulled down if floating. |
| A1 | Device Address Input | Second bit of 3-bit hardware address; enables multi-device bus topology without software address remapping. |
| A2 | Device Address Input | Most significant device address bit; allows up to eight AT24C512BY7-YH-T units on same I²C bus. |
| GND | Ground Reference | System return path for VCC, SDA, SCL, and WP; must be low-impedance to maintain noise margin on I²C lines. |
| VCC | Power Supply | 1.8–3.6 V input; powers internal EEPROM array, timing circuitry, and I/O buffers - requires local 100 nF decoupling. |
| WP | Write Protect Control | Active-high hardware lock: tied to VCC disables all writes; tied to GND enables full read/write access. |
| SCL | Serial Clock Input | Positive-edge clock for data-in; negative-edge clock for data-out - must be driven by master with rise/fall time ≤300 ns (1.8 V). |
| SDA | Serial Data I/O | Open-drain bidirectional line; requires external pull-up (10 kΩ typical); supports wire-OR with other I²C peripherals. |
Key Features
| Feature | Design Value |
|---|---|
| 128-byte Page Write Mode | Enables burst programming of configuration blocks with single stop condition - reduces I²C transaction overhead by >90% vs. byte writes. |
| Schmitt Trigger Inputs | Provides ≥0.3×VCC hysteresis on SCL/SDA - rejects EMI-induced glitches in motor drive or power converter PCB layouts. |
| Hardware + Software Write Protection | WP pin disables writes globally; software lock bits protect individual memory segments - prevents accidental firmware corruption during field updates. |
| 1.8 V Low-Voltage Operation | Supports direct interfacing with 1.8 V microcontrollers (e.g., STM32L4, MSP430FR) without level-shifting circuitry. |
| 8-lead Ultra Thin SAP (8Y7) | 6.0 × 4.9 mm footprint with 0.6 mm max height - ideal for space-constrained IoT edge nodes and portable medical devices. |
Applications
| Industrial PLC Configuration Storage | Smart Sensor Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile configuration register bank accessed via I²C during boot and runtime reconfiguration. Use Value: Enables field-upgradable control logic without requiring flash reprogramming; retains settings through power loss and brownout events. |
Use Scenario: Holding factory-trimmed offset/gain coefficients and temperature compensation tables in MEMS pressure or inertial sensors. IC Role / Device Role / Timing Role: Persistent calibration memory read once at power-on and cached in MCU RAM for real-time correction. Use Value: Achieves ±0.1% measurement accuracy over –40°C to +85°C without recalibration; eliminates need for external trim components. |
| Medical Device Usage Logs | Energy Meter Firmware Parameters |
Use Scenario: Recording sterilization cycles, usage hours, and error codes in portable diagnostic equipment subject to FDA audit requirements. IC Role / Device Role / Timing Role: Tamper-resistant event logger with write-protected archive sectors and timestamped entries. Use Value: Meets IEC 62304 data integrity requirements; 40-year retention ensures lifetime traceability for Class II devices. |
Use Scenario: Storing tariff schedules, CT/PT ratios, and demand-response profiles in ANSI C12.20-compliant smart electricity meters. IC Role / Device Role / Timing Role: Secure parameter vault accessible only after authenticated I²C command sequence. Use Value: Supports remote firmware updates and utility-side configuration changes without meter replacement or physical access. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C512BN-SH-T | Same 512 Kbit capacity and 1.8 V operation, but in 8-lead JEDEC SOIC (8S1) package - 5.0 × 6.2 mm, 1.75 mm height. | Preferred for through-hole prototyping or legacy board redesigns where SOIC footprint is already allocated. | Select when mechanical compatibility with existing SOIC layouts is required; not drop-in for 8Y7 due to different pad geometry and height. |
| M24512-RMN6TP | 512 Kbit EEPROM from STMicroelectronics; 1.7–5.5 V operation; 400 kHz I²C; TSSOP8 (8A2) package - 3.0 × 6.4 mm, 1.05 mm height. | Offers wider voltage range and automotive qualification (AEC-Q100 Grade 2), but lacks 1 MHz mode and has lower endurance (300k cycles). | Choose for automotive telematics or extended-temperature designs where AEC-Q100 compliance is mandatory. |
Compared with AT24C512BN-SH-T and M24512-RMN6TP, the AT24C512BY7-YH-T delivers superior space efficiency (6.0 × 4.9 mm SAP), higher write endurance (1M vs. 300k cycles), and faster 1 MHz I²C support - making it optimal for next-generation compact industrial and medical electronics.
Availability
AT24C512BY7-YH-T is available at Aetrix Electronics and suitable for industrial control systems, smart sensor nodes, medical diagnostics equipment, and energy metering platforms requiring stable component supply across multi-year production cycles.
Supply support for AT24C512BY7-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 product continuity, technical support, and manufacturing for the AT24Cxx EEPROM family.
The AT24C512B series was designed specifically for robust, low-power nonvolatile data storage in industrial and commercial systems where reliability, small footprint, and I²C simplicity are critical.
FAQ
What is the operating voltage range for AT24C512BY7-YH-T?
The AT24C512BY7-YH-T operates from 1.8 V to 3.6 V. This low-voltage range enables direct integration with 1.8 V microcontrollers and battery-powered systems without level shifters. The device is not rated for 2.5 V–5.5 V operation - that variant is designated AT24C512BY7-YH25-T. Always verify VCC against the specific suffix to avoid functional failure.
Does AT24C512BY7-YH-T support I²C clock stretching?
No, the AT24C512BY7-YH-T does not implement clock stretching. It relies on fixed internal timing for ACK generation and data output. The SCL line must be fully controlled by the master, and the device responds within tAA (≤0.9 µs at 1.8 V) after SCL falling edge. Applications requiring slave-controlled timing must use alternative protocols or buffering strategies.
How many AT24C512BY7-YH-T devices can share one I²C bus?
Up to eight AT24C512BY7-YH-T devices can share a single I²C bus using the A0, A1, and A2 address pins. Each pin can be hardwired to GND or VCC, yielding 2³ = 8 unique 3-bit hardware addresses. All devices must use identical VCC and signal levels; bus capacitance must remain ≤400 pF to maintain 400 kHz timing margins.
What is the meaning of "YH" and "T" in AT24C512BY7-YH-T?
In AT24C512BY7-YH-T, "Y7" denotes the 8-lead Ultra Thin SAP package (8Y7), "YH" specifies NiPdAu lead finish and industrial temperature grade (–40°C to +85°C), and "T" indicates tape-and-reel packaging (3,000 units per reel). This exact ordering code ensures consistent solderability, thermal reliability, and automated assembly compatibility.
Can AT24C512BY7-YH-T be used in place of AT24C512BN-SH-T?
No, AT24C512BY7-YH-T is not a pin-compatible replacement for AT24C512BN-SH-T. While both are 512 Kbit, 1.8 V EEPROMs, they differ in package (8Y7 Ultra Thin SAP vs. 8S1 JEDEC SOIC), pad layout, height, and thermal profile. PCB redesign is required to substitute one for the other - no shared footprint or reflow profile.
AT24C512BY7-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:
- 512Kbit
- Memory Organization:
- 64K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 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)
AT24C512BY7-YH-T FAQ
1.How can I place an order for AT24C512BY7-YH-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C512BY7-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 AT24C512BY7-YH-T reliable?
The price and inventory of AT24C512BY7-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 AT24C512BY7-YH-T is usually 5 days.
3.What payment methods are accepted for AT24C512BY7-YH-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C512BY7-YH-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C512BY7-YH-T?
AT24C512BY7-YH-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C512BY7-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 AT24C512BY7-YH-T?
For technical support, including AT24C512BY7-YH-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C512BY7-YH-T requirements.
6.How does Aetrix verify that AT24C512BY7-YH-T is sourced from the original manufacturer or authorized distributors?
All AT24C512BY7-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 AT24C512BY7-YH-T meets industry standards.
7.What is the process for return or replacement of AT24C512BY7-YH-T?
All AT24C512BY7-YH-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C512BY7-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 AT24C512BY7-YH-T part is unused and in its original packaging.
Return procedure for AT24C512BY7-YH-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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