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Microchip Technology AT24C128W-10SU-1.8
- Part No.:
- AT24C128W-10SU-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT24C128W-10SU-1.8.pdf
- Description:
- IC EEPROM 128KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,800
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Product details
Overview
AT24C128W-10SU-1.8 from Microchip Technology (formerly Atmel) is a 128 Kbit (16,384 × 8) two-wire serial EEPROM optimized for low-power, 1.8 V operation (1.8 V to 3.6 V supply). It supports 100 kHz I²C bus speed at 1.8 V, features hardware write protection via the WP pin, and delivers 1 million write cycles with 40-year data retention. It is used in battery-powered IoT sensors and embedded system configuration storage.
For engineers reviewing the AT24C128W-10SU-1.8 datasheet, AT24C128W-10SU-1.8 pinout, AT24C128W-10SU-1.8 application, or AT24C128W-10SU-1.8 equivalent, this page provides verified electrical specs, package mapping to 8-lead SAP, I²C timing constraints at 1.8 V, and validated alternative parts for industrial temperature (–40°C to +85°C) designs.
Technical Context
The AT24C128W-10SU-1.8 implements a standard two-wire (I²C-compatible) interface with open-drain SDA and Schmitt-triggered SCL inputs for noise immunity. It uses internal address latching and auto-incrementing during sequential reads, supporting byte and 64-byte page writes with self-timed internal write cycles (max 5 ms).
It operates exclusively in the 1.8 V to 3.6 V range and is qualified for industrial temperature (–40°C to +85°C). The "W" suffix denotes EIAJ SOIC package compatibility, and "SU" confirms RoHS-compliant, halogen-free green packaging - specifically the 8-lead Small Array Package (SAP), per ordering code documentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 128 Kbit (16,384 words × 8 bits); sufficient for firmware parameter tables or calibration data in compact embedded systems. |
| Supply Voltage Range | 1.8 V to 3.6 V; enables direct interfacing with 1.8 V logic families without level shifting. |
| I²C Clock Frequency | 100 kHz max at 1.8 V; defines maximum sustained data throughput of ~10 KB/s in page-write mode. |
| Write Endurance | 1,000,000 cycles; supports frequent logging or runtime configuration updates over product lifetime. |
| Data Retention | 40 years at 85°C; ensures long-term reliability in unattended industrial deployments. |
| Page Write Size | 64 bytes; reduces I²C transaction overhead versus byte writes, improving efficiency in burst data storage. |
| Operating Temperature | –40°C to +85°C; validated for use in automotive cabin modules and industrial controllers. |
Pinout & Package
AT24C128W-10SU-1.8 is packaged in an 8-lead Small Array Package (SAP), 6.00 mm × 4.90 mm body, RoHS-compliant and halogen-free ("U" suffix). Pin 1 is marked by an index area on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power Supply | Connects to 1.8–3.6 V rail; decoupling capacitor (0.1 µF) required within 10 mm for stable I²C operation. |
| WP | Hardware Write Protect | Pulled high to VCC to disable all writes; floating or pulled low enables full read/write access. |
| SCL | Serial Clock Input | Accepts 100 kHz I²C clock with Schmitt-trigger input; requires external pull-up to VCC (10 kΩ typical at 1.8 V). |
| SDA | Serial Data I/O | Open-drain bidirectional line; shares bus with other I²C devices; requires same pull-up as SCL. |
| A0, A1 | Device Address Inputs | Hardwired or left floating (internally pulled down); set slave address bits for up to four devices on one bus. |
| NC | No Connect | Not bonded internally; must remain unconnected on PCB to avoid parasitic coupling. |
| GND | Ground Reference | System ground return; should be tied directly to low-impedance ground plane beneath package. |
Key Features
| Feature | Design Value |
|---|---|
| 1.8 V Operation | Enables integration into ultra-low-power systems powered by single-cell Li-ion or coin cells without voltage translation. |
| 64-byte Page Write | Reduces I²C protocol overhead by up to 63× versus byte writes, accelerating bulk configuration updates. |
| Schmitt-trigger Inputs | Rejects fast transient noise on SCL/SDA lines, eliminating false clocking or bus lockup in electrically noisy environments. |
| Hardware Write Protection | Prevents accidental or malicious firmware corruption during field operation via simple WP pin control. |
| Extended Temp Rating | Validated performance across –40°C to +85°C ensures reliable boot-time parameter loading in outdoor or under-hood applications. |
Applications
| Smart Meter Calibration Storage | Industrial PLC Configuration Backup |
|---|---|
Use Scenario: Storing meter-specific calibration coefficients and tariff tables updated infrequently but requiring decades of retention. IC Role / Device Role / Timing Role: Nonvolatile configuration memory holding critical metrology parameters accessed at power-up and during firmware updates. Use Value: 40-year data retention and 1M write cycles ensure calibration integrity across the meter's full service life without replacement. | Use Scenario: Preserving user-defined I/O mapping, PID tuning values, and alarm thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: Persistent parameter store accessed via microcontroller I²C during cold start or configuration restore. Use Value: 1.8 V operation allows direct connection to 1.8 V FPGA I/O banks, eliminating level shifters and reducing BOM count. |
| Medical Sensor Module Settings | Automotive Body Control Unit NVM |
Use Scenario: Saving sensor offset/gain trim values and patient-specific thresholds in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-power serial EEPROM interfaced to an ARM Cortex-M0+ MCU during initialization and calibration routines. Use Value: 100 kHz I²C speed at 1.8 V meets timing requirements while minimizing active current draw during parameter load. | Use Scenario: Storing seat position memory, mirror presets, and lighting profiles in automotive body control modules. IC Role / Device Role / Timing Role: Industrial-temp EEPROM providing robust NVM for user preferences across vehicle lifecycle. Use Value: –40°C to +85°C rating guarantees reliable operation in under-dash environments subject to thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C128B-SSHM-T | Same 128 Kbit density and 1.8 V operation, but in 8-lead SOIC (JEDEC) package; supports 400 kHz at 1.8 V. | Higher I²C speed and standardized SOIC footprint simplify board reuse where SAP layout is unavailable. | Select when higher bus bandwidth or legacy SOIC land pattern compatibility is required. |
| M24128-BWMN6TP | 128 Kbit, 1.8–5.5 V operation, 400 kHz max, 8-lead TSSOP package; STMicroelectronics part with identical SAP pinout but different marking. | Broader voltage range and TSSOP package offer flexibility in mixed-voltage designs and tighter board spacing. | Select when dual-voltage support or TSSOP assembly infrastructure is preferred over SAP. |
Compared with AT24C128W-10SU-1.8, AT24C128B-SSHM-T offers faster 400 kHz I²C at 1.8 V and JEDEC SOIC compatibility, while M24128-BWMN6TP provides wider 1.8–5.5 V operation and TSSOP packaging - both retain 1M endurance and 40-year retention but differ in package geometry and speed grading.
Availability
AT24C128W-10SU-1.8 is available at Aetrix Electronics and suitable for smart meter calibration storage, industrial PLC configuration backup, and medical sensor module settings requiring stable component supply across extended temperature and low-voltage operating conditions.
Supply support for AT24C128W-10SU-1.8 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 global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with a focus on embedded control and connectivity.
The AT24C128W-10SU-1.8 belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed for cost-sensitive, low-power embedded systems requiring reliable, byte-addressable nonvolatile storage in space-constrained industrial and consumer applications.
FAQ
What is the maximum I²C clock frequency supported by AT24C128W-10SU-1.8 at 1.8 V?
The AT24C128W-10SU-1.8 supports a maximum I²C clock frequency of 100 kHz when operated at 1.8 V. This value is specified in Table 4 (AC Characteristics – Industrial Temperatures) of the official datasheet and reflects the timing limit for reliable communication under low-voltage conditions. Exceeding this frequency may result in data corruption or bus arbitration failure.
Does AT24C128W-10SU-1.8 support hardware write protection, and how is it implemented?
Yes, AT24C128W-10SU-1.8 supports hardware write protection via the WP (Write Protect) pin. When WP is driven high to VCC, all write operations-including byte, page, and erase-are inhibited. When WP is grounded or left floating (internally pulled down), full read/write access is enabled. This feature is documented in the Pin Description section and ensures robust data integrity in field-deployed systems.
What package type does AT24C128W-10SU-1.8 use, and what are its key mechanical dimensions?
AT24C128W-10SU-1.8 uses the 8-lead Small Array Package (SAP), designated as 8Y4 in Microchip's ordering guide. Its body measures 6.00 mm × 4.90 mm with a 1.27 mm lead pitch. Pin 1 is identified by an index area on the top surface, and the package is RoHS-compliant and halogen-free, as indicated by the "U" suffix in the part number.
Is AT24C128W-10SU-1.8 suitable for extended temperature applications beyond –40°C to +85°C?
No, AT24C128W-10SU-1.8 is rated only for the industrial temperature range of –40°C to +85°C. While some AT24Cxx variants (e.g., those marked with process letter "B") support extended temperature (–40°C to +125°C), the AT24C128W-10SU-1.8 is not qualified for operation above +85°C. Its AC and DC characteristics are validated only within the industrial range.
How many devices can share the same I²C bus with AT24C128W-10SU-1.8, and what determines addressing?
Up to four AT24C128W-10SU-1.8 devices can share a single I²C bus using the A0 and A1 address pins. These pins configure the two least-significant bits of the 7-bit slave address (1010 A1 A0 R/W). Hardwiring A0/A1 to VCC or GND sets unique addresses; floating pins are internally pulled down, defaulting to "00". This addressing scheme is defined in the Device Addressing section of the datasheet.
AT24C128W-10SU-1.8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 128Kbit
- Memory Organization:
- 16K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 10ms
- 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-SOIC
AT24C128W-10SU-1.8 FAQ
1.How can I place an order for AT24C128W-10SU-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C128W-10SU-1.8 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 AT24C128W-10SU-1.8 reliable?
The price and inventory of AT24C128W-10SU-1.8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C128W-10SU-1.8 is usually 5 days.
3.What payment methods are accepted for AT24C128W-10SU-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C128W-10SU-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C128W-10SU-1.8?
AT24C128W-10SU-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C128W-10SU-1.8 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 AT24C128W-10SU-1.8?
For technical support, including AT24C128W-10SU-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C128W-10SU-1.8 requirements.
6.How does Aetrix verify that AT24C128W-10SU-1.8 is sourced from the original manufacturer or authorized distributors?
All AT24C128W-10SU-1.8 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 AT24C128W-10SU-1.8 meets industry standards.
7.What is the process for return or replacement of AT24C128W-10SU-1.8?
All AT24C128W-10SU-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C128W-10SU-1.8, 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 AT24C128W-10SU-1.8 part is unused and in its original packaging.
Return procedure for AT24C128W-10SU-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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