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Microchip Technology 24AA512/S16K
- Part No.:
- 24AA512/S16K
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- Die
- Datasheet:
-
24AA512/S16K.pdf
- Description:
- IC EEPROM 512KBIT I2C 400KHZ DIE
- Quantity:
- Payment:
- Shipping:
Inventory:2,944
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Product details
Overview
24AA512/S16K from Microchip Technology Inc. is a 512 Kbit I²C-compatible serial EEPROM organized as 64K × 8-bit memory, operating from 1.7V to 5.5V with 400 µA max read current and 1 µA max standby current. It features hardware write-protection, 128-byte page write buffer, and supports up to eight devices on one bus for expanded address space. It is used in industrial control systems for nonvolatile parameter storage across power cycles.
For engineers reviewing the 24AA512/S16K datasheet, 24AA512/S16K pinout, 24AA512/S16K application, or 24AA512/S16K equivalent, key selection criteria include low-voltage operation down to 1.7V, I²C clock compatibility up to 400 kHz, industrial temperature range (–40°C to +85°C), and hardware write-protect functionality for secure configuration retention.
Technical Context
The 24AA512/S16K implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal architecture includes a 128-byte page latch, HV generator for EEPROM programming, and address decoding logic supporting cascaded configurations via A0–A2 pins.
It uses self-timed erase/write cycles with 5 ms maximum page write time and supports byte and page write modes. The device maintains an internal address pointer for sequential reads and allows random access via explicit address setup, with automatic wraparound at the 64K boundary.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (64K × 8-bit) - provides sufficient nonvolatile storage for firmware parameters, calibration data, and device configuration in resource-constrained embedded systems. |
| Supply Voltage Range | 1.7V to 5.5V - enables direct integration into battery-powered or mixed-voltage designs without level-shifting. |
| I²C Clock Frequency | Up to 400 kHz (100 kHz below 2.5V) - ensures compatibility with standard and fast-mode I²C controllers while maintaining timing margin under low-VCC conditions. |
| Page Write Buffer | 128 bytes - reduces write transaction overhead by allowing burst writes within a single physical page, improving system-level throughput. |
| Endurance & Retention | 1 million erase/write cycles; >200 years data retention - guarantees long-term reliability in applications requiring frequent updates, such as metering or logging. |
| Temperature Range | Industrial: –40°C to +85°C - validated for use in factory automation, HVAC controls, and industrial HMI where ambient thermal stress is present. |
| Write Protection | Hardware-enabled via WP pin tied to VCC - prevents accidental overwrites during power-up/down or software faults without requiring firmware intervention. |
Pinout & Package
24AA512/S16K is available in multiple packages including 8-lead SOIC, TSSOP, PDIP, DFN, UDFN, SOT-23, and 8-ball CSP. The /S16K suffix corresponds to the 8-lead SOIC (SM) package per Microchip's marking convention and Device Selection Table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Chip Address Inputs | Configure device address bits for multi-drop I²C bus; enable up to eight 24AA512/S16K devices on same bus with unique client addresses. |
| VSS | Ground Reference | Return path for all internal circuitry and I/O; must be connected to system ground plane for stable operation and ESD immunity. |
| SDA | Serial Data I/O | Open-drain bidirectional line for address/data transfer; requires external pull-up resistor (2–10 kΩ depending on clock speed). |
| SCL | Serial Clock Input | Master-generated clock synchronizing all I²C transactions; Schmitt-trigger input ensures noise immunity in electrically noisy environments. |
| WP | Write-Protect Control | Hardware lock: tied to VCC disables all write operations while preserving read access - critical for protecting factory-calibrated values. |
| VCC | Power Supply | Single supply input supporting 1.7–5.5V; powers EEPROM array, interface logic, and charge pump; decoupling capacitor required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | Functional down to 1.7V VCC - eliminates need for voltage regulators in coin-cell or energy-harvesting applications. |
| Page Write Capability | 128-byte buffer enables efficient bulk writes - reduces host CPU overhead and I²C bus occupancy versus byte-by-byte programming. |
| Noise Immunity | Schmitt-trigger inputs and output slope control suppress EMI-induced glitches - improves robustness in motor-driven or switching-power-supply environments. |
| Hardware Write Protection | Pin-based WP logic prevents unintended writes without software involvement - essential for safety-critical or certified systems requiring tamper resistance. |
| Extended Endurance | 1 million write cycles per page - supports daily firmware update logging or real-time sensor calibration storage over 10+ years of field operation. |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping, PID tuning parameters, and alarm thresholds in programmable logic controllers that retain settings across power loss. IC Role / Device Role / Timing Role: Nonvolatile configuration register providing persistent memory accessible via standard I²C interface during boot and runtime. Use Value: Eliminates need for battery-backed SRAM; ensures deterministic startup behavior and regulatory compliance for Class I medical equipment. | Use Scenario: Recording sensor offset/gain coefficients and user-defined measurement ranges in portable diagnostic instruments. IC Role / Device Role / Timing Role: Secure, write-protected data vault accessed only during calibration mode to prevent runtime corruption. Use Value: Meets IEC 62304 requirements for traceable calibration history and supports audit-ready device certification. |
| Smart Energy Meter Firmware Parameters | Automotive Body Control Module Settings |
Use Scenario: Holding tariff schedules, pulse constants, and communication protocol keys in ANSI C12.22-compliant electricity meters. IC Role / Device Role / Timing Role: Tamper-resistant configuration store with hardware write-lock activated during normal operation. Use Value: Prevents unauthorized reprogramming and satisfies ANSI C12.10 security mandates for revenue-grade metering. | Use Scenario: Saving seat/mirror position presets, lighting profiles, and door lock behavior in automotive BCMs. IC Role / Device Role / Timing Role: Low-power EEPROM interfaced directly to microcontroller I²C peripheral without level shifters. Use Value: Enables 1.7V operation compatible with vehicle battery brown-out conditions and meets AEC-Q100 Grade 2 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC512-I/P | Requires minimum 2.5V VCC; same 400 kHz max clock; identical pinout and memory organization. | Limited to higher-voltage systems; not suitable for 1.8V or coin-cell powered designs. | Select when operating above 2.5V and cost sensitivity outweighs ultra-low-voltage capability. |
| AT24C512BN-SH-T | Same 512 Kbit density and I²C interface; supports 1 MHz clock; different WP pin behavior (active-high vs. active-low logic). | Higher-speed operation possible but requires validation of WP signal polarity in existing schematics. | Choose for faster write throughput where system-level timing margins allow 1 MHz I²C and WP logic alignment. |
Compared with 24AA512/S16K, the 24LC512-I/P lacks sub-2.5V operation but offers identical packaging and footprint compatibility, while the AT24C512BN-SH-T delivers higher clock speed at the cost of WP pin functional divergence - making 24AA512/S16K optimal for low-voltage, drop-in-replacement scenarios demanding guaranteed 1.7V functionality.
Availability
24AA512/S16K is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, smart energy meters, and automotive body electronics requiring stable component supply across extended product lifecycles.
Supply support for 24AA512/S16K 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 Inc. is a leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing infrastructure.
The 24AA512 belongs to Microchip's serial EEPROM product line, engineered for reliable, low-power nonvolatile data storage in industrial, automotive, and medical applications where write endurance and voltage flexibility are critical.
FAQ
What is the minimum operating voltage for the 24AA512/S16K?
The 24AA512/S16K operates down to 1.7V, enabling use in battery-powered or energy-constrained systems where other EEPROMs require ≥2.5V. This specification is confirmed in the Device Selection Table and Electrical Characteristics section of DS20001754Q, with full functionality-including 400 µA read current and 1 µA standby-guaranteed across the 1.7–5.5V range.
Does the 24AA512/S16K support 1 MHz I²C clock frequency?
No, the 24AA512/S16K supports up to 400 kHz I²C clock frequency (100 kHz below 2.5V). Only the 24FC512 variant in the same family supports 1 MHz. This distinction is explicitly stated in the Device Selection Table and AC Characteristics tables of DS20001754Q, where FCLK max is listed as 400 kHz for 24AA512.
How many devices can be connected on the same I²C bus using the 24AA512/S16K?
Up to eight 24AA512/S16K devices can be connected on a single I²C bus using the A0, A1, and A2 address pins to configure unique 3-bit chip addresses. This is documented in the Features list, Block Diagram description, and Device Addressing section of DS20001754Q, with each combination enabling distinct client addressing via the 1010xxxR/W control byte format.
What is the page write size and maximum write time for the 24AA512/S16K?
The 24AA512/S16K has a 128-byte page write buffer and a maximum write cycle time of 5 ms per page or byte. This value is specified in the Features list and confirmed in Table 1-2 (Param. No. 16, TWC) of DS20001754Q, with no variation across voltage or temperature grades for this part number.
Is the 24AA512/S16K AEC-Q100 qualified?
Yes, the 24AA512/S16K is AEC-Q100 qualified for automotive applications, as stated in the Features section of DS20001754Q. It meets Grade 2 temperature requirements (–40°C to +105°C), though its rated industrial range is –40°C to +85°C; qualification status applies to the device family and is verified per AEC-Q100 Rev G test conditions.
24AA512/S16K Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- Die
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Die
24AA512/S16K FAQ
1.How can I place an order for 24AA512/S16K through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA512/S16K 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 24AA512/S16K reliable?
The price and inventory of 24AA512/S16K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24AA512/S16K is usually 5 days.
3.What payment methods are accepted for 24AA512/S16K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA512/S16K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA512/S16K?
24AA512/S16K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA512/S16K 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 24AA512/S16K?
For technical support, including 24AA512/S16K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA512/S16K requirements.
6.How does Aetrix verify that 24AA512/S16K is sourced from the original manufacturer or authorized distributors?
All 24AA512/S16K 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 24AA512/S16K meets industry standards.
7.What is the process for return or replacement of 24AA512/S16K?
All 24AA512/S16K units undergo pre-shipment inspection (PSI). If there is an issue with 24AA512/S16K, 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 24AA512/S16K part is unused and in its original packaging.
Return procedure for 24AA512/S16K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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