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Microchip Technology AT24C128N-10SU-2.7
- Part No.:
- AT24C128N-10SU-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C128N-10SU-2.7.pdf
- Description:
- IC EEPROM 128KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,251
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Product details
Overview
AT24C128N-10SU-2.7 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 at 2.7V, features hardware write protection via the WP pin, and delivers 1 million write cycles with 40-year data retention. It is used in embedded systems for configuration storage, calibration data logging, and firmware parameter backup.
For engineers reviewing the AT24C128N-10SU-2.7 datasheet, AT24C128N-10SU-2.7 pinout, AT24C128N-10SU-2.7 application, or AT24C128N-10SU-2.7 equivalent, this page provides verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options - all grounded in the official AT24C128/256 datasheet (0670T–SEEPR–3/07).
Technical Context
The AT24C128N-10SU-2.7 implements a standard I²C-compatible two-wire interface with open-drain SDA and edge-triggered SCL, supporting up to four devices on a shared bus via A0/A1 address inputs. Its internal architecture organizes memory as 256 pages of 64 bytes each, enabling partial-page writes and automatic address roll-over within pages.
It integrates Schmitt-trigger inputs with noise filtering, bidirectional data transfer protocol with 9-bit acknowledge cycle, and hardware/software write protection through the dedicated WP pin. The device enters low-power standby mode after STOP condition receipt and supports acknowledge polling during internal write cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 128 Kbit (16,384 × 8), sufficient for storing >16 KB of persistent configuration or calibration data |
| Supply Voltage Range | 2.7V to 5.5V - compatible with 3.3V and 5V logic domains without level shifting |
| I²C Clock Frequency | 400 kHz at 2.7V - enables fast parameter updates while maintaining noise immunity in noisy industrial environments |
| Write Cycle Time | Max 5 ms (process "B" devices) - defines minimum interval between successive write commands |
| Endurance & Retention | 1 million write cycles / 40 years data retention - validated for long-life deployment in field-upgradable equipment |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade operation without derating |
| Package | 8-lead SOIC (JEDEC 8S1) - surface-mount compatible with standard reflow profiles and automated assembly |
Pinout & Package
AT24C128N-10SU-2.7 is supplied in an 8-lead JEDEC SOIC package (8S1), measuring 4.90 mm × 3.90 mm × 1.75 mm (max height), RoHS-compliant and halogen-free ("U" suffix). Pin 1 is located at the top-left corner with notch or dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hardwired low/high or left floating (internally pulled down); selects one of four possible I²C addresses on shared bus |
| A1 | Device Address Input | Same function as A0; combined with A0, enables up to four AT24C128N-10SU-2.7 devices on same I²C bus |
| NC | No Connect | Unbonded pin; must remain unconnected - no routing or pull-up/pull-down required |
| GND | Ground Reference | Primary return path for VCC and signal currents; requires low-impedance connection to system ground plane |
| VCC | Power Supply | Accepts 2.7V–5.5V; decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin |
| WP | Write Protect Control | Active-high: tied to VCC disables all writes; tied to GND enables full read/write access |
| SCL | Serial Clock Input | Positive-edge clock for data sampling; requires external pull-up resistor (typically 2.2–10 kΩ) |
| SDA | Serial Data I/O | Open-drain bidirectional line; shares pull-up with other I²C devices; supports wire-OR topology |
Key Features
| Feature | Design Value |
|---|---|
| 64-byte Page Write Mode | Enables burst programming of up to 64 bytes per command, reducing I²C transaction overhead by ~94% vs. byte-write for full-page updates |
| Schmitt Trigger Inputs | Provides hysteresis on SCL/SDA/A0/A1 pins, rejecting noise spikes <150 mV and ensuring reliable timing in electrically noisy industrial settings |
| Hardware Write Protection | WP pin allows board-level lockout of memory writes - critical for preventing accidental corruption of boot parameters or security keys |
| Self-timed Write Cycle | Internal timer eliminates need for host MCU to manage write delay; host can poll ACK to detect completion instead of fixed wait |
| Extended Temp Support | Qualified from –40°C to +85°C with full AC/DC specs guaranteed - suitable for outdoor metering, factory automation, and transportation electronics |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing sensor offset/gain coefficients and linearization tables in temperature, pressure, or flow transmitters deployed in manufacturing lines. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed during power-up and recalibration routines; retains values across cold starts and brownouts. Use Value: Enables field-replaceable sensor modules with unique calibration data preserved independently of host MCU firmware. | Use Scenario: Holding user-selectable therapy modes, alarm thresholds, and device ID in portable infusion pumps and diagnostic monitors. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for FDA-required operational logs and safety-critical configuration; WP pin prevents runtime modification. Use Value: Meets IEC 62304 software lifecycle requirements by isolating configuration from executable code and enabling audit-ready change history. |
| Smart Energy Meter Firmware | Automotive Body Control Module |
Use Scenario: Saving tariff schedules, demand-response settings, and tamper-event timestamps in ANSI C12.22-compliant electricity meters. IC Role / Device Role / Timing Role: Low-power EEPROM interfaced via I²C to metering SoC; accessed only during scheduled updates or fault recovery. Use Value: Guarantees 40-year data integrity under continuous 50/60 Hz magnetic fields and thermal cycling - validated per ANSI C12.1 and IEC 62056. | Use Scenario: Storing seat position memory, mirror presets, and lighting profiles in automotive BCMs operating in under-hood environments. IC Role / Device Role / Timing Role: Industrial-temp EEPROM co-located with microcontroller; survives 1000+ thermal cycles (-40°C to +105°C ambient). Use Value: Eliminates need for external voltage supervisors or backup capacitors due to robust 2.7V operation and fast 400 kHz writes during ignition-on initialization. |
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 | Successor part with identical 128K × 8 organization, same 8S1 package, but enhanced reliability (1M cycles guaranteed across full 1.7–5.5V range) | Recommended for new designs; supports wider voltage range and extended qualification including AEC-Q200 stress testing | Select when designing new products requiring long-term supply assurance and automotive-qualified variants |
| M24128-BWMN6TP | STMicroelectronics 128K I²C EEPROM in 8-lead SOIC; supports 1 MHz @ 5V, 400 kHz @ 2.5V, and 100 kHz @ 1.8V; 3 ms max write time | Offers faster write performance and broader voltage compatibility (1.7–5.5V), but lacks extended temp validation beyond –40°C to +85°C | Choose when higher-speed writes or dual-voltage flexibility (e.g., battery-backed 1.8V + main 3.3V rail) are prioritized over extended temp certification |
Compared with AT24C128N-10SU-2.7, AT24C128B-SSHM-T provides guaranteed 1M endurance across its full voltage range and formal AEC-Q200 readiness, while M24128-BWMN6TP delivers faster 3 ms writes and broader 1.7–5.5V operation - both require minor layout review for decoupling and pull-up tuning but no PCB redesign.
Availability
AT24C128N-10SU-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and smart energy meter firmware requiring stable component supply and long-term data integrity.
Supply support for AT24C128N-10SU-2.7 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 reliability and long-term product support.
The AT24C128N-10SU-2.7 belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed specifically for cost-sensitive, space-constrained industrial and commercial systems requiring robust, low-power, I²C-compatible nonvolatile storage.
FAQ
What is the maximum I²C clock frequency supported by AT24C128N-10SU-2.7 at 2.7V?
The AT24C128N-10SU-2.7 supports up to 400 kHz I²C clock frequency when operated at 2.7V, as specified in Table 4 (AC Characteristics – Industrial Temperatures) of the official datasheet. This ensures reliable communication in electrically noisy industrial environments while maintaining timing margins for standard microcontroller GPIO-based bit-banging or hardware I²C peripherals.
Does AT24C128N-10SU-2.7 support hardware write protection?
Yes, AT24C128N-10SU-2.7 includes a dedicated Write Protect (WP) pin. When WP is driven high to VCC, all write operations-including byte, page, and erase-are inhibited. When WP is tied to GND, full read/write access is enabled. This hardware lock provides deterministic, board-level protection against accidental or malicious firmware corruption.
What package type is used for AT24C128N-10SU-2.7?
AT24C128N-10SU-2.7 uses an 8-lead JEDEC SOIC package (designated 8S1), with body dimensions of 4.90 mm × 3.90 mm and maximum height of 1.75 mm. The "U" suffix confirms it is lead-free, halogen-free, and RoHS-compliant - suitable for modern automated SMT assembly and reflow processes.
How many devices can share the same I²C bus using AT24C128N-10SU-2.7?
Up to four AT24C128N-10SU-2.7 devices can be connected to a single I²C bus using the A0 and A1 address input pins. Each device is assigned a unique 3-bit chip address (1010xx0), where xx is determined by the logic state of A0 and A1 - allowing flexible multi-device configurations without address conflicts.
Is AT24C128N-10SU-2.7 suitable for extended temperature applications?
No - AT24C128N-10SU-2.7 is rated for industrial temperature range (–40°C to +85°C) only. While some process "B" variants of the AT24C128 family support extended temperature (–40°C to +125°C), the AT24C128N-10SU-2.7 ordering code corresponds to the standard industrial-grade version, as confirmed in the Ordering Information table (page 13) and Absolute Maximum Ratings section.
AT24C128N-10SU-2.7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- 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-10SU-2.7 FAQ
1.How can I place an order for AT24C128N-10SU-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C128N-10SU-2.7 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-10SU-2.7 reliable?
The price and inventory of AT24C128N-10SU-2.7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C128N-10SU-2.7 is usually 5 days.
3.What payment methods are accepted for AT24C128N-10SU-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C128N-10SU-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C128N-10SU-2.7?
AT24C128N-10SU-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C128N-10SU-2.7 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-10SU-2.7?
For technical support, including AT24C128N-10SU-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C128N-10SU-2.7 requirements.
6.How does Aetrix verify that AT24C128N-10SU-2.7 is sourced from the original manufacturer or authorized distributors?
All AT24C128N-10SU-2.7 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-10SU-2.7 meets industry standards.
7.What is the process for return or replacement of AT24C128N-10SU-2.7?
All AT24C128N-10SU-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C128N-10SU-2.7, 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-10SU-2.7 part is unused and in its original packaging.
Return procedure for AT24C128N-10SU-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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