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Microchip Technology AT24C128-10PI-2.7
- Part No.:
- AT24C128-10PI-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C128-10PI-2.7.pdf
- Description:
- IC EEPROM 128KBIT I2C 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,440
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Product details
Overview
AT24C128-10PI-2.7 from Microchip Technology (formerly Atmel) is a 128 Kbit (16,384 × 8) two-wire serial EEPROM with low-voltage operation (2.7V–5.5V), 400 kHz I²C bus compatibility, and hardware write protection via the WP pin. It features 64-byte page write capability, 100,000 write cycles endurance, and 40-year data retention - deployed in industrial sensor nodes, embedded metering systems, and power supply configuration storage.
For engineers reviewing the AT24C128-10PI-2.7 datasheet, AT24C128-10PI-2.7 pinout, AT24C128-10PI-2.7 application, or AT24C128-10PI-2.7 equivalent, key selection considerations include its industrial temperature range (−40°C to +85°C), PDIP-8 package, 2.7V minimum VCC, and I²C timing compliance at 400 kHz under 2.7V operation.
Technical Context
The AT24C128-10PI-2.7 implements a standard two-wire (I²C-compatible) serial 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 without rollover across page boundaries when limited to ≤64 bytes per transaction.
It uses Schmitt-trigger inputs with noise filtering on SCL/SDA, supports acknowledge polling during write cycles, and enforces hardware write protection when WP is driven high. The device enters low-power standby mode after STOP condition receipt or power-up, drawing only 0.5 µA typical at 2.7V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 128 Kbit (16,384 × 8), sufficient for firmware parameter tables or calibration data in resource-constrained microcontrollers. |
| Supply Voltage | 2.7V to 5.5V - enables direct interfacing with 3.3V and 5V logic without level shifters. |
| I²C Speed | 400 kHz max at 2.7V - ensures reliable communication in industrial environments with moderate noise immunity. |
| Write Cycle Time | 10 ms max - defines minimum interval between successive write commands; impacts real-time logging latency. |
| Endurance | 100,000 write cycles - supports frequent reconfiguration in programmable power supplies or field-upgradable modules. |
| Data Retention | 40 years at +85°C - guarantees long-term storage integrity in unattended infrastructure equipment. |
| Operating Temp | −40°C to +85°C - qualified for industrial control cabinets, automotive body electronics, and outdoor telemetry units. |
Pinout & Package
AT24C128-10PI-2.7 is supplied in an 8-pin Plastic Dual Inline Package (PDIP), 0.300" wide (8P3), with through-hole mounting and JEDEC-standard pinout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hardwired low/high to select one of four possible I²C addresses (0x50–0x53); floating defaults to logic 0. |
| A1 | Device Address Input | Second address bit; used with A0 to enable multi-device bus topology without software address remapping. |
| NC | No Connect | Pin 3 is internally unused; must remain unconnected to avoid unintended coupling or leakage paths. |
| GND | Ground Reference | System return path for VCC and I/O; requires low-impedance connection to minimize ground bounce during write cycles. |
| VCC | Power Supply | Primary supply input (2.7–5.5V); bypass capacitor (0.1 µF) recommended adjacent to pin for noise suppression. |
| WP | Write Protect Control | Active-high hardware lock: tied to VCC disables all writes; tied to GND or left floating enables full read/write access. |
| SCL | Serial Clock Input | Positive-edge clock for data sampling; requires external pull-up resistor (typically 4.7 kΩ) to VCC. |
| SDA | Serial Data I/O | Bidirectional open-drain bus line; shares pull-up with SCL; supports wire-OR with other I²C peripherals. |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | Functional down to 2.7V VCC - eliminates need for voltage regulators in 3.3V systems with brown-out margins. |
| Page write mode | 64-byte burst writes reduce I²C transaction overhead by >90% vs. byte-by-byte programming for block updates. |
| Schmitt-trigger inputs | Enhanced noise immunity on SCL/SDA - prevents spurious clocking or data corruption in electrically noisy factory floors. |
| Hardware write protect | WP pin allows irreversible lock of critical configuration data during field deployment or manufacturing test. |
| Industrial temperature grade | Validated operation from −40°C to +85°C - supports use in motor drives, HVAC controllers, and railway signaling hardware. |
Applications
| Smart Energy Metering | Industrial PLC Configuration |
|---|---|
Use Scenario: Storing tariff schedules, meter calibration constants, and tamper-event logs in DIN-rail mounted electricity meters. IC Role / Device Role / Timing Role: Nonvolatile parameter store interfaced via I²C to an ARM Cortex-M3 host MCU with deterministic 400 kHz access. Use Value: Guarantees 40-year retention of billing-critical data without battery backup, even during extended power outages. | Use Scenario: Holding I/O mapping tables, PID tuning parameters, and firmware update staging buffers in modular programmable logic controllers. IC Role / Device Role / Timing Role: Configurable memory node on shared I²C bus with three other AT24C128 devices, addressed via A0/A1 pins. Use Value: Enables field reconfiguration of control logic without PCB redesign; WP pin prevents accidental overwrites during runtime. |
| Medical Diagnostic Equipment | Automotive Body Control Module |
Use Scenario: Saving user preferences, sensor calibration offsets, and diagnostic fault history in portable ultrasound or ECG analyzers. IC Role / Device Role / Timing Role: Low-power EEPROM accessed during boot and maintenance mode; draws only 0.5 µA in standby at 2.7V. Use Value: Extends battery life in handheld devices while preserving regulatory-compliant audit trails across device lifecycles. | Use Scenario: Storing seat position memory, mirror presets, and lighting profiles in vehicle body control units operating across automotive temperature extremes. IC Role / Device Role / Timing Role: Industrial-grade AT24C128-10PI-2.7 variant qualified to −40°C/+85°C, interfaced to CAN-connected microcontroller. Use Value: Meets AEC-Q100 stress requirements for non-safety-critical memory functions without derating or additional qualification effort. |
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, 2.5V–5.5V VCC range, but rated for 1 MHz at 5V only; 10 µA max standby current at 2.5V. | Higher speed at 5V, but less suitable for 2.7V-only systems requiring sub-1 µA sleep current. | Select if system operates at 5V and requires faster writes; verify WP functionality matches hardware lock requirements. |
| ON Semiconductor CAT24C128WI-GT3 | Identical 128 Kbit organization and 2.7V–5.5V range; offers 1 MHz support at 2.7V and lower 0.1 µA standby current at 2.7V. | Better suited for ultra-low-power battery-backed applications where <0.5 µA standby is mandatory. | Prefer for energy-harvesting or coin-cell-powered designs needing tighter current budgets and higher I²C speed at low VCC. |
Compared with AT24C128-10PI-2.7, M24C128-WMN6TP trades lower standby current for reduced low-voltage speed headroom, while CAT24C128WI-GT3 delivers superior 2.7V performance and lower quiescent draw - making it optimal for battery-sensitive designs despite minor footprint differences.
Availability
AT24C128-10PI-2.7 is available at Aetrix Electronics and suitable for industrial automation, smart metering, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT24C128-10PI-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 components, and nonvolatile memory solutions, with broad industrial and automotive qualification portfolios.
The AT24C128 series was designed specifically for robust, low-power serial data storage in space-constrained embedded systems requiring guaranteed data integrity over decades of operation.
FAQ
What is the maximum I²C clock frequency supported by AT24C128-10PI-2.7 at 2.7V?
The AT24C128-10PI-2.7 supports up to 400 kHz I²C clock frequency when operated at 2.7V–5.5V. This is explicitly specified in the AC Characteristics table for the "2.7V" option, distinguishing it from the 1 MHz rating valid only at 5.0V. Exceeding 400 kHz at 2.7V may result in timing violations and failed ACKs.
Does AT24C128-10PI-2.7 require external pull-up resistors on SDA and SCL lines?
Yes, AT24C128-10PI-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 moderate trace length.
Can AT24C128-10PI-2.7 be used in place of AT24C128-10PI without modification?
No - AT24C128-10PI-2.7 is optimized for 2.7V–5.5V operation, whereas AT24C128-10PI is rated for 4.5V–5.5V only. Using AT24C128-10PI-2.7 in a 5V-only design is safe, but substituting the standard version into a 2.7V system will cause functional failure due to insufficient supply margin.
How does the WP pin function on AT24C128-10PI-2.7?
On AT24C128-10PI-2.7, the WP pin provides hardware-level write protection: when pulled high to VCC, all write operations (byte and page) are inhibited; when tied to GND or left floating (internally pulled down), full read/write access is enabled. This enables secure field updates without software vulnerability.
What package type is used for AT24C128-10PI-2.7?
AT24C128-10PI-2.7 uses an 8-pin Plastic Dual Inline Package (PDIP), 0.300" wide (JEDEC MS-001 BA), designated as package code 8P3 in Microchip's ordering information - suitable for through-hole prototyping and legacy industrial PCBs.
AT24C128-10PI-2.7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C128-10PI-2.7 FAQ
1.How can I place an order for AT24C128-10PI-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C128-10PI-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 AT24C128-10PI-2.7 reliable?
The price and inventory of AT24C128-10PI-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 AT24C128-10PI-2.7 is usually 5 days.
3.What payment methods are accepted for AT24C128-10PI-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C128-10PI-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C128-10PI-2.7?
AT24C128-10PI-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C128-10PI-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 AT24C128-10PI-2.7?
For technical support, including AT24C128-10PI-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C128-10PI-2.7 requirements.
6.How does Aetrix verify that AT24C128-10PI-2.7 is sourced from the original manufacturer or authorized distributors?
All AT24C128-10PI-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 AT24C128-10PI-2.7 meets industry standards.
7.What is the process for return or replacement of AT24C128-10PI-2.7?
All AT24C128-10PI-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C128-10PI-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 AT24C128-10PI-2.7 part is unused and in its original packaging.
Return procedure for AT24C128-10PI-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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