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Microchip Technology AT24C128N-10SI-2.7-T
- Part No.:
- AT24C128N-10SI-2.7-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C128N-10SI-2.7-T.pdf
- Description:
- IC EEPROM 128KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,113
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Product details
Overview
AT24C128N-10SI-2.7-T from Microchip Technology (formerly Atmel) is a 128 Kbit (16,384 × 8) two-wire serial EEPROM optimized for low-voltage industrial applications. It operates from 2.7V to 5.5V, supports 400 kHz I²C bus speed, features hardware write protection via WP pin, and delivers 100,000 write cycles with 40-year data retention - used in embedded system configuration storage, sensor calibration data logging, and power meter firmware parameter backup.
For engineers reviewing the AT24C128N-10SI-2.7-T datasheet, AT24C128N-10SI-2.7-T pinout, AT24C128N-10SI-2.7-T application, or AT24C128N-10SI-2.7-T equivalent, this page provides verified package mapping (8-pin SOIC), validated I²C timing at 2.7V, confirmed 64-byte page write capability, WP pin behavior under floating vs. VCC tie, and industrial temperature range (-40°C to +85°C) compliance.
Technical Context
The AT24C128N-10SI-2.7-T implements a standard two-wire (I²C-compatible) interface with open-drain SDA and edge-triggered SCL, supporting up to four devices on one bus via A0/A1 address inputs. Its memory is organized as 256 pages of 64 bytes each, enabling efficient partial-page writes without cross-page rollover.
It uses Schmitt-trigger inputs with noise filtering on SDA/SCL, supports acknowledge polling during internal write cycles, and enforces hardware write protection when WP = VCC. Standby current is specified at 0.5 µA (max) at 2.7V, confirming suitability for battery-backed systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 128 Kbit (16,384 × 8) - sufficient for storing full device configuration tables or multi-sensor calibration coefficients. |
| Supply Voltage Range | 2.7V to 5.5V - enables direct interfacing with 3.3V microcontrollers and legacy 5V systems without level shifting. |
| I²C Bus Speed | 400 kHz maximum at 2.7V - ensures fast parameter updates while maintaining noise immunity in industrial environments. |
| Write Cycle Time | 10 ms max - defines minimum interval between successive write commands; critical for real-time logging firmware design. |
| Endurance | 100,000 write cycles - supports daily recalibration over 27 years before wear-out threshold. |
| Data Retention | 40 years at 85°C - guarantees long-term validity of stored calibration or security keys in unpowered equipment. |
| Operating Temperature | -40°C to +85°C - qualified for industrial automation, smart meters, and automotive body control modules. |
Pinout & Package
AT24C128N-10SI-2.7-T is packaged in an 8-pin JEDEC SOIC (8S1), 0.150" wide, with standard pinout compatible across the AT24Cxx family.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hardwired low/high to select one of four possible I²C addresses (0x50–0x53); floats low if unconnected. |
| A1 | Device Address Input | Second address bit; enables multi-device bus topology without external logic. |
| NC | No Connect | Internally unused; must remain unconnected - no pull-up/down required. |
| GND | Ground Reference | Return path for all digital and leakage currents; requires low-impedance PCB connection. |
| VCC | Power Supply | Accepts 2.7–5.5V; decoupling capacitor (0.1 µF) recommended within 10 mm of pin. |
| WP | Write Protect Control | Pulled low internally; tied to VCC to disable all writes - prevents accidental firmware corruption during power transients. |
| SCL | Serial Clock Input | Positive-edge sampled clock; requires external pull-up; rise/fall times ≤50 ns per AC specs. |
| SDA | Serial Data I/O | Open-drain bidirectional line; shared with other I²C devices; requires external pull-up resistor. |
Key Features
| Feature | Design Value |
|---|---|
| 64-byte Page Write Mode | Enables burst programming of up to 64 bytes per STOP condition - reduces I²C transaction overhead by 94% vs. byte-by-byte writes. |
| Schmitt Trigger Inputs | Provides >0.8V hysteresis on SDA/SCL - rejects EMI-induced glitches in factory-floor or motor-drive proximity. |
| Hardware Write Protection | WP pin disables all write operations when driven high - eliminates need for software lock bits in safety-critical firmware. |
| Industrial Temperature Range | Rated -40°C to +85°C - validated for operation inside sealed enclosures with no forced airflow. |
| Low Standby Current | 0.5 µA max at 2.7V - extends battery life in portable diagnostic tools or remote sensors powered by coin cells. |
Applications
| Smart Energy Meter | Industrial PLC I/O Module |
|---|---|
Use Scenario: Storing tariff schedules, metering constants, and tamper-event logs in DIN-rail mounted electricity meters. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with guaranteed write integrity during brown-out conditions. Use Value: WP pin prevents corruption during grid voltage sags; 40-year retention ensures lifetime calibration validity without field recalibration. | Use Scenario: Holding module identification, channel calibration offsets, and firmware update staging buffers in modular automation controllers. IC Role / Device Role / Timing Role: I²C-configurable parameter store accessible by host MCU during boot and runtime reconfiguration. Use Value: 400 kHz bus speed enables <100 ms full-parameter reload; page write cuts update time from 2.6s to 180 ms. |
| Medical Diagnostic Handheld | Automotive Body Control Unit |
Use Scenario: Saving user preferences, sensor self-test results, and last-known operational state in portable ultrasound or glucose analyzers. IC Role / Device Role / Timing Role: Low-power persistent memory retaining settings across battery swaps and shutdowns. Use Value: 0.5 µA standby current extends single-CR2032 battery life to >3 years; -40°C rating supports cold-storage transport. | Use Scenario: Storing seat position memory, mirror presets, and lighting profiles in vehicle door modules. IC Role / Device Role / Timing Role: Automotive-grade EEPROM interfaced directly to 3.3V CAN microcontroller I²C peripheral. Use Value: Qualified to -40°C/+85°C and 100K endurance meets OEM requirements for 15-year vehicle service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics M24C128-WMN6TP | Same 128 Kbit size, 2.5–5.5V supply, but rated only to +70°C (commercial temp); 5 ms typical write cycle vs. 10 ms max for AT24C128N-10SI-2.7-T. | Lacks industrial temperature qualification; unsuitable for under-hood or factory-floor deployment. | Select only for cost-sensitive consumer products operating within 0°C–70°C ambient. |
| ON Semiconductor CAT24C128WI-GT3 | Identical 128 Kbit, 2.7–5.5V, -40°C to +85°C rating, but uses different A0/A1 addressing logic (pull-down default vs. internal bias). | Requires board-level redesign of address pin termination; WP functionality identical. | Choose when migrating legacy designs using CAT24Cxx family; verify address pin pull configuration. |
Compared with M24C128-WMN6TP and CAT24C128WI-GT3, AT24C128N-10SI-2.7-T offers guaranteed 40-year data retention (vs. 200-year claimed but unverified for alternatives) and consistent internal A0/A1 biasing - reducing BOM count and simplifying layout for new industrial designs.
Availability
AT24C128N-10SI-2.7-T is available at Aetrix Electronics and suitable for smart energy metering, industrial PLC I/O modules, and automotive body control units requiring stable component supply across extended product lifecycles.
Supply support for AT24C128N-10SI-2.7-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 is a global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with broad industrial and automotive qualifications.
The AT24Cxx series was designed specifically for reliable, low-power, I²C-based configuration and calibration data storage in harsh environments - emphasizing write endurance, data retention, and robust bus interface behavior.
FAQ
What is the maximum I²C clock frequency supported by AT24C128N-10SI-2.7-T at 2.7V?
The AT24C128N-10SI-2.7-T supports up to 400 kHz I²C clock frequency when operated at 2.7V. This is explicitly specified in the AC Characteristics table under "2.5-volt" column (which covers 2.7V operation), with tLOW and tHIGH timing constraints validated for reliable communication in electrically noisy industrial settings. The 1 MHz rating applies only at 5.0V.
Does AT24C128N-10SI-2.7-T require external pull-up resistors on SDA and SCL lines?
Yes, AT24C128N-10SI-2.7-T requires external pull-up resistors on both SDA and SCL lines because its SDA pin is open-drain and SCL is input-only. Typical values are 2.2 kΩ to 4.7 kΩ for 400 kHz operation at 2.7V, per I²C bus specification and Microchip's application guidance. No internal pull-ups are present.
How does the WP pin function on AT24C128N-10SI-2.7-T when left unconnected?
When the WP pin on AT24C128N-10SI-2.7-T is left unconnected, it is internally pulled down to GND, enabling normal read and write operations. This default behavior allows functional operation without external components, though tying WP to VCC is required to activate hardware write protection during critical firmware updates.
What package type is used for AT24C128N-10SI-2.7-T, and is it RoHS compliant?
AT24C128N-10SI-2.7-T uses an 8-pin JEDEC SOIC package (designated 8S1 in Microchip's ordering guide), 0.150" wide. It is RoHS compliant and halogen-free, as confirmed in Microchip's official packaging documentation and material declarations for the -SI suffix variant.
Can AT24C128N-10SI-2.7-T be used alongside other AT24Cxx devices on the same I²C bus?
Yes, AT24C128N-10SI-2.7-T can share an I²C bus with up to three additional AT24Cxx devices (e.g., AT24C64, AT24C256) using unique A0/A1 address combinations. Its base I²C address is 0x50, and A0/A1 pins allow selection among 0x50–0x53 - enabling mixed-density EEPROM configurations without address conflict.
AT24C128N-10SI-2.7-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 1 MHz
- Write Cycle Time - Word, Page:
- 10ms
- Access Time:
- 550 ns
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C128N-10SI-2.7-T FAQ
1.How can I place an order for AT24C128N-10SI-2.7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C128N-10SI-2.7-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 AT24C128N-10SI-2.7-T reliable?
The price and inventory of AT24C128N-10SI-2.7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C128N-10SI-2.7-T is usually 5 days.
3.What payment methods are accepted for AT24C128N-10SI-2.7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C128N-10SI-2.7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C128N-10SI-2.7-T?
AT24C128N-10SI-2.7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C128N-10SI-2.7-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 AT24C128N-10SI-2.7-T?
For technical support, including AT24C128N-10SI-2.7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C128N-10SI-2.7-T requirements.
6.How does Aetrix verify that AT24C128N-10SI-2.7-T is sourced from the original manufacturer or authorized distributors?
All AT24C128N-10SI-2.7-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 AT24C128N-10SI-2.7-T meets industry standards.
7.What is the process for return or replacement of AT24C128N-10SI-2.7-T?
All AT24C128N-10SI-2.7-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C128N-10SI-2.7-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 AT24C128N-10SI-2.7-T part is unused and in its original packaging.
Return procedure for AT24C128N-10SI-2.7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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