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Microchip Technology AT24C128N-10SC-2.7
- Part No.:
- AT24C128N-10SC-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C128N-10SC-2.7.pdf
- Description:
- IC EEPROM 128KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,543
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Product details
Overview
AT24C128N-10SC-2.7 from Microchip Technology (formerly Atmel) is a 128 Kbit (16,384 × 8) two-wire serial EEPROM optimized for low-voltage embedded systems. It operates from 2.7V to 5.5V, supports up to 400 kHz I²C bus speed, features hardware write protection via the WP pin, and delivers 100,000 write cycles with 40-year data retention - ideal for industrial sensor calibration storage and firmware parameter backup.
For engineers reviewing the AT24C128N-10SC-2.7 datasheet, AT24C128N-10SC-2.7 pinout, AT24C128N-10SC-2.7 application, or AT24C128N-10SC-2.7 equivalent, this page provides verified package mapping (8-pin SOIC), confirmed 64-byte page write capability, validated I²C timing at 2.7V, exact device addressing logic (A0/A1), and real-world endurance and standby current specs.
Technical Context
The AT24C128N-10SC-2.7 implements a standard two-wire (I²C-compatible) interface with open-drain SDA and edge-triggered SCL, supporting cascaded multi-device bus configurations using A0/A1 address pins. Its internal architecture organizes memory as 256 pages of 64 bytes each, enabling partial-page writes without rollover beyond page boundaries when ≤64 bytes are transmitted.
It uses Schmitt-trigger inputs with noise filtering on SDA/SCL, enforces strict tWR = 10 ms max write cycle timing, and incorporates an internal pull-down on the WP pin - allowing hardware write protection when tied high to VCC or defaulting to writable mode when floating or grounded.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 128 Kbit (16,384 × 8), organized in 256 pages of 64 bytes - enables efficient block-level updates without full-erase overhead. |
| Supply Voltage Range | 2.7V to 5.5V - compatible with mixed-voltage 3.3V microcontroller systems and legacy 5V designs. |
| I²C Bus Speed | Up to 400 kHz at 2.7V - ensures reliable communication with standard-speed I²C masters without requiring high-speed mode support. |
| Write Cycle Time | Max 10 ms - defines minimum inter-write interval; critical for firmware update sequencing and logging rate planning. |
| Endurance & Retention | 100,000 write cycles / 40 years data retention - meets long-life requirements for field-deployed industrial controllers and medical device configuration storage. |
| Standby Current | 0.5 µA max at 2.7V - enables ultra-low-power operation in battery-backed or energy-harvesting applications. |
| ESD Protection | >4000V HBM - provides robust handling margin during PCB assembly and system integration. |
Pinout & Package
AT24C128N-10SC-2.7 is packaged in an 8-pin JEDEC SOIC (package code 8S1), 0.150" wide, with standard gull-wing leads and surface-mount footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hardwired low/high to select one of four possible I²C addresses (0x50–0x53); float = logic low by internal bias. |
| A1 | Device Address Input | Second address bit; used with A0 to enable up to four AT24C128N-10SC-2.7 devices on same I²C bus without address conflict. |
| NC | No Connect | Pin 3 is unconnected internally - must be left floating or tied to GND/VCC per layout best practice (no electrical function). |
| GND | Ground Reference | System return path for VCC and I/O; requires low-impedance connection to minimize noise coupling into SDA/SCL lines. |
| VCC | Power Supply | Primary supply input (2.7–5.5V); decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin for stable I²C operation. |
| WP | Write Protect Control | Active-high hardware lock: tie to VCC to inhibit all writes; float or GND enables normal read/write access. |
| SCL | Serial Clock Input | Positive-edge sampled clock; requires external pull-up (typically 2.2–10 kΩ) to VCC; determines maximum I²C transaction rate. |
| SDA | Serial Data I/O | Bidirectional open-drain line shared across I²C bus; requires same pull-up as SCL; supports multi-master arbitration. |
Key Features
| Feature | Design Value |
|---|---|
| 64-byte Page Write Mode | Enables burst programming of up to 64 bytes per write cycle - reduces firmware update time by ~63× vs. byte-by-byte writes. |
| Schmitt Trigger Inputs | Filters noise on SDA/SCL lines - eliminates false start/stop detection in electrically noisy industrial environments (e.g., motor drives, PLCs). |
| Hardware + Software Write Protection | WP pin + internal address-locking logic prevents accidental overwrites during power brownouts or MCU reset glitches. |
| Self-timed Write Cycle | Internal timing eliminates need for host MCU to poll status - simplifies firmware and avoids bus contention during writes. |
| Cascadable I²C Architecture | Supports up to four AT24C128N-10SC-2.7 devices on one bus using A0/A1 - reduces BOM count in multi-sensor modules. |
Applications
| Industrial Sensor Calibration Storage | Medical Device Configuration Backup |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for temperature, pressure, and humidity sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed at power-on via I²C; retains values across 10+ year deployments without battery. Use Value: Eliminates manual recalibration; ensures traceable accuracy compliance (IEC 61508 SIL2) through guaranteed 40-year data retention. | Use Scenario: Preserving user-adjusted therapy parameters (e.g., infusion rate, alarm thresholds) in portable insulin pumps and dialysis monitors. IC Role / Device Role / Timing Role: Secure, low-power configuration memory updated infrequently but requiring absolute write integrity during battery operation. Use Value: WP pin prevents corruption during unexpected shutdown; 0.5 µA standby current extends single-CR2032 battery life to >2 years. |
| Automotive Body Control Module (BCM) | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Holding seat/mirror position presets and lighting profiles in 12V automotive BCMs operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-grade EEPROM interfaced directly to 3.3V CAN microcontroller; survives load-dump transients via robust ESD design. Use Value: Qualified for extended temperature range; >4000V HBM rating withstands assembly ESD events and in-vehicle electrostatic discharge. | Use Scenario: Storing signed firmware patches downloaded over PLC or RF links in utility-grade smart meters deployed in remote substations. IC Role / Device Role / Timing Role: Secure update staging area - writes occur only after cryptographic signature verification completes. Use Value: 100,000 write cycles support 10+ years of quarterly patch updates; page-write mode minimizes flash wear on primary MCU memory. |
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 128K capacity, 2.5V–5.5V supply, 8-pin SOIC, but rated for -40°C to +125°C and uses newer process node. | Higher temperature grade suits under-hood automotive use; not qualified for medical or industrial calibration where 40-year retention is mandated. | Select if extended temp range is primary requirement and 40-year retention is secondary. |
| M24C128-WMN6TP | 128K I²C EEPROM, 1.8V–5.5V, 8-pin SOIC, 1 MHz max speed, but only 10,000 write cycles and 200-year retention claimed (not 40-year proven). | Larger voltage range and faster speed benefit portable designs; lower endurance limits field-replaceable module lifetime. | Prefer for consumer IoT where cost and speed outweigh long-term reliability; avoid for safety-critical infrastructure. |
Compared with AT24C128N-10SC-2.7, AT24C128B-SSHM-T offers wider temperature tolerance but lacks documented 40-year retention, while M24C128-WMN6TP trades endurance and proven longevity for broader voltage support and higher speed - making AT24C128N-10SC-2.7 optimal for industrial calibration and medical backup where data integrity over decades is non-negotiable.
Availability
AT24C128N-10SC-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration storage, medical device configuration backup, and automotive body control modules requiring stable component supply across extended lifecycle programs.
Supply support for AT24C128N-10SC-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, longevity, and industrial-grade qualification.
The AT24C128 series was designed specifically for mission-critical parameter storage in harsh environments - emphasizing endurance, data retention, and I²C interoperability across voltage domains and temperature ranges.
FAQ
What is the maximum I²C clock frequency supported by AT24C128N-10SC-2.7?
The AT24C128N-10SC-2.7 supports up to 400 kHz I²C clock frequency when operated within its 2.7V to 5.5V supply range. This is validated per AC Characteristics table in the official datasheet (Rev. 0670E), where tLOW and tHIGH timing parameters are specified for 400 kHz operation at 2.7V. Exceeding this frequency may result in unreliable ACK/NACK signaling or data corruption.
Does AT24C128N-10SC-2.7 require external pull-up resistors on SDA and SCL lines?
Yes, AT24C128N-10SC-2.7 requires external pull-up resistors on both SDA and SCL lines because its I/O pins are open-drain. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and speed; 4.7 kΩ is commonly used for 400 kHz operation with ≤400 pF total bus capacitance. The AT24C128N-10SC-2.7 itself does not integrate internal pull-ups.
How many AT24C128N-10SC-2.7 devices can share the same I²C bus?
Up to four AT24C128N-10SC-2.7 devices can share a single I²C bus using the A0 and A1 address pins. Each combination of A0/A1 logic levels selects a unique 7-bit device address (0x50–0x53). Pins left unconnected default to logic low via internal bias, enabling simple hardware configuration without additional components.
What happens if the WP pin on AT24C128N-10SC-2.7 is left unconnected?
When the WP pin on AT24C128N-10SC-2.7 is left unconnected, it is internally pulled down to GND, enabling full read and write access to the memory array. This default behavior allows immediate functionality without external wiring, though tying WP to VCC is required to activate hardware write protection during critical operations or power transitions.
Is AT24C128N-10SC-2.7 compatible with 1.8V I²C systems?
No, AT24C128N-10SC-2.7 is not compatible with 1.8V I²C systems. Its "-2.7" suffix denotes a 2.7V to 5.5V operating range. For 1.8V operation, the correct variant is AT24C128N-10SC-1.8, which supports 1.8V to 3.6V and reduces maximum I²C speed to 100 kHz. Using AT24C128N-10SC-2.7 below 2.7V risks functional failure or data corruption.
AT24C128N-10SC-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:
- 10ms
- Access Time:
- 550 ns
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C128N-10SC-2.7 FAQ
1.How can I place an order for AT24C128N-10SC-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C128N-10SC-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-10SC-2.7 reliable?
The price and inventory of AT24C128N-10SC-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-10SC-2.7 is usually 5 days.
3.What payment methods are accepted for AT24C128N-10SC-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C128N-10SC-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C128N-10SC-2.7?
AT24C128N-10SC-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C128N-10SC-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-10SC-2.7?
For technical support, including AT24C128N-10SC-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C128N-10SC-2.7 requirements.
6.How does Aetrix verify that AT24C128N-10SC-2.7 is sourced from the original manufacturer or authorized distributors?
All AT24C128N-10SC-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-10SC-2.7 meets industry standards.
7.What is the process for return or replacement of AT24C128N-10SC-2.7?
All AT24C128N-10SC-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C128N-10SC-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-10SC-2.7 part is unused and in its original packaging.
Return procedure for AT24C128N-10SC-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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