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Microchip Technology 24AA08/WF15K
- Part No.:
- 24AA08/WF15K
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- Die
- Datasheet:
-
24AA08/WF15K.pdf
- Description:
- IC EEPROM 8KBIT I2C 400KHZ DIE
- Quantity:
- Payment:
- Shipping:
Inventory:1,707
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Product details
Overview
24AA08/WF15K from Microchip Technology Inc. is an 8-Kbit I²C-compatible serial EEPROM organized as four 256 × 8-bit blocks, operating from 1.7V to 5.5V with 400 kHz max clock frequency (100 kHz below 2.5V), 1 µA standby current, and 16-byte page write buffer. It features hardware write-protection via the WP pin and supports industrial temperature range (–40°C to +85°C) in SOIC-8 package.
For engineers reviewing the 24AA08/WF15K datasheet, 24AA08/WF15K pinout, 24AA08/WF15K application, or 24AA08/WF15K equivalent, this page delivers verified electrical specs, I²C timing constraints, pin-level functional roles, real-world use cases in embedded configuration storage, and validated alternative parts for supply continuity and design flexibility.
Technical Context
The 24AA08/WF15K 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 16-byte page latch, HV generator for EEPROM programming, and address pointer logic supporting current-address, random, and sequential read modes.
It uses a fixed 4-bit device identifier (1010b) with 2-bit block select (B1/B0) and R/W bit for addressing four 256-word memory blocks. Write operations are self-timed with 5 ms maximum cycle time, and ACK polling enables precise bus synchronization without fixed delays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1024 × 8), partitioned into four independent 256-word blocks for segmented firmware/config storage. |
| VCC Range | 1.7V–5.5V - enables direct integration with low-voltage microcontrollers (e.g., 1.8V/3.3V logic) without level-shifting. |
| Max Clock Frequency | 400 kHz at VCC ≥ 2.5V; 100 kHz at 1.7V ≤ VCC < 2.5V - ensures reliable I²C timing across wide supply range. |
| Page Write Buffer | 16 bytes - reduces write transaction count by up to 16× versus byte-write, improving system-level throughput. |
| Endurance & Retention | 1 million erase/write cycles and >200 years data retention - suitable for long-life industrial logging and calibration storage. |
| Write Protection | Hardware-enabled via WP pin tied to VCC - prevents accidental overwrites during power-up/down or firmware updates. |
| ESD Rating | >4 kV HBM - provides robustness against handling and board-level ESD events in manufacturing and field environments. |
Pinout & Package
24AA08/WF15K is supplied in 8-Lead SOIC (SN) package per Microchip drawing C04-057-SN Rev F, with standard 1.27 mm pitch, 3.90 mm body width, and exposed pad not present (unlike DFN/TDFN variants).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A0) | No-connect | Internally unconnected; may be left floating or tied to VSS/VCC with no functional impact. |
| 2 (A1) | No-connect | Internally unconnected; no effect on addressing or operation. |
| 3 (A2) | No-connect | Internally unconnected; unused in all 24XX08 family devices. |
| 4 (VSS) | Ground reference | Primary return path for I²C bus and internal circuitry; must be low-impedance connection. |
| 5 (SDA) | Serial data I/O | Open-drain bidirectional line requiring external pull-up (2–10 kΩ); carries addresses, data, and ACK/NACK signals. |
| 6 (SCL) | Serial clock input | Master-generated clock synchronizing all I²C transfers; Schmitt-trigger input rejects noise on rising/falling edges. |
| 7 (WP) | Write-protect control | Active-high enable: tie to VCC to lock entire 000h–3FFh memory space; tie to VSS for full read/write access. |
| 8 (VCC) | Power supply | Single supply input (1.7–5.5V); powers EEPROM array, logic, and I/O buffers; decoupling capacitor required. |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation down to 1.7V | Enables direct interfacing with energy-harvesting systems and battery-powered IoT nodes without voltage boosters. |
| 16-byte page write buffer | Reduces I²C transaction overhead by batching writes - cuts bus occupancy time vs. single-byte writes by ~94%. |
| Schmitt-trigger inputs + output slope control | Eliminates false triggering from bus noise and ground bounce, ensuring reliable communication in electrically noisy industrial settings. |
| Hardware write-protect (WP pin) | Provides deterministic, power-independent memory lockdown - critical for protecting bootloader parameters and security keys. |
| 1 µA max standby current (I-temp) | Minimizes quiescent power draw in always-on systems such as smart meters and remote sensors. |
| AEC-Q100 qualified | Validated for automotive applications including infotainment configuration, sensor calibration, and ECU parameter storage. |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
|
Use Scenario: Storing factory-calibrated offset/gain coefficients and linearization tables for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed during power-up and recalibration routines via I²C; no timing-critical latency requirements. Use Value: Ensures measurement accuracy across temperature and lifetime without requiring external calibration hardware or host MCU flash usage. |
Use Scenario: Holding user-selectable therapy parameters (e.g., dosage limits, alarm thresholds) and device serialization data in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage of safety-critical settings; WP pin prevents runtime corruption during battery swaps or firmware updates. Use Value: Meets IEC 62304 Class C software safety requirements by isolating configuration from volatile RAM and main application flash. |
| Automotive Body Control Module | Smart Home Gateway Firmware Settings |
|
Use Scenario: Persisting door lock/unlock patterns, mirror position memory, and lighting profiles across ignition cycles in BCMs. IC Role / Device Role / Timing Role: AEC-Q100-qualified EEPROM storing user preferences; accessed asynchronously during wake-up sequences. Use Value: Provides guaranteed 1M+ write cycles and >200-year retention - exceeds vehicle lifetime requirements without wear leveling. |
Use Scenario: Storing Wi-Fi credentials, Zigbee channel maps, and OTA update rollback images in residential gateways. IC Role / Device Role / Timing Role: Low-power, I²C-configurable nonvolatile memory enabling secure credential persistence across reboots and brownouts. Use Value: 1.7V operation allows retention during deep-sleep states powered solely by backup capacitors or coin cells. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC08B-I/P | Requires minimum 2.5V VCC; same 400 kHz speed and 16-byte page buffer; shares identical SOIC-8 pinout and I²C protocol. | Limited to 2.5–5.5V systems - unsuitable for 1.8V microcontrollers or battery-depleted operation. | Select when supply rail is stable ≥2.5V and legacy compatibility with older 24LC08B designs is required. |
| 24FC08-I/SN | Supports 1 MHz I²C (vs. 400 kHz), 1.7–5.5V operation, and extended temp (–40°C to +125°C); same 8-pin SOIC footprint. | Higher-speed writes reduce bus contention in high-throughput systems; extended temp rating suits under-hood automotive use. | Choose for new designs needing faster configuration loading or operation beyond industrial temperature range. |
Compared with 24AA08/WF15K, 24LC08B-I/P trades lower voltage support for identical timing and packaging, while 24FC08-I/SN adds speed and temperature margin at no PCB layout change - making it ideal for next-generation upgrades.
Availability
24AA08/WF15K is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, and smart home gateway firmware settings requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for 24AA08/WF15K 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 global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with a focus on reliability, longevity, and embedded system integration.
The 24AA08/WF15K belongs to Microchip's 24XX08 family of I²C serial EEPROMs, designed specifically for low-power, space-constrained applications requiring robust nonvolatile storage with minimal external components and guaranteed endurance.
FAQ
What is the maximum I²C clock frequency supported by the 24AA08/WF15K?
The 24AA08/WF15K supports up to 400 kHz when VCC is 2.5V or higher. At supply voltages between 1.7V and 2.5V, the maximum clock frequency is reduced to 100 kHz to ensure reliable timing margins. This dual-speed capability allows seamless integration across both 3.3V and 1.8V system domains without protocol changes.
Does the 24AA08/WF15K require external pull-up resistors on SDA and SCL lines?
Yes, the 24AA08/WF15K requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. Typical values are 10 kΩ for 100 kHz operation and 2 kΩ for 400 kHz, selected based on bus capacitance and rise-time requirements specified in the datasheet.
How does the write-protect (WP) pin function on the 24AA08/WF15K?
When the WP pin of the 24AA08/WF15K is tied to VCC, the entire memory array (addresses 000h–3FFh) becomes write-protected - all write and page-write commands are ignored, though reads remain fully functional. When WP is tied to VSS, normal read/write operation is enabled. This hardware-level protection operates independently of software state.
What is the memory organization of the 24AA08/WF15K?
The 24AA08/WF15K contains 8 Kbits of EEPROM memory organized as four independent blocks of 256 × 8-bit words (total 1024 bytes). Block selection is controlled by bits B1 and B0 in the I²C control byte, allowing isolated access to each 256-byte segment without cross-block interference.
Is the 24AA08/WF15K compatible with standard I²C protocols and controllers?
Yes, the 24AA08/WF15K is fully compliant with standard I²C protocol specifications, including Start/Stop conditions, ACK/NACK handshaking, and 7-bit addressing (with fixed 1010b prefix and 2-bit block select). It interoperates with any standard I²C master - including ARM Cortex-M peripherals, Raspberry Pi, and Arduino Wire libraries - without custom drivers.
24AA08/WF15K Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- Die
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 8Kbit
- Memory Organization:
- 256 x 8 x 4
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Die
24AA08/WF15K FAQ
1.How can I place an order for 24AA08/WF15K through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA08/WF15K 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 24AA08/WF15K reliable?
The price and inventory of 24AA08/WF15K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24AA08/WF15K is usually 5 days.
3.What payment methods are accepted for 24AA08/WF15K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA08/WF15K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA08/WF15K?
24AA08/WF15K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA08/WF15K 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 24AA08/WF15K?
For technical support, including 24AA08/WF15K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA08/WF15K requirements.
6.How does Aetrix verify that 24AA08/WF15K is sourced from the original manufacturer or authorized distributors?
All 24AA08/WF15K 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 24AA08/WF15K meets industry standards.
7.What is the process for return or replacement of 24AA08/WF15K?
All 24AA08/WF15K units undergo pre-shipment inspection (PSI). If there is an issue with 24AA08/WF15K, 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 24AA08/WF15K part is unused and in its original packaging.
Return procedure for 24AA08/WF15K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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