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Microchip Technology AT24C128-10PC-2.7
- Part No.:
- AT24C128-10PC-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C128-10PC-2.7.pdf
- Description:
- IC EEPROM 128KBIT I2C 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,477
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Product details
Overview
AT24C128-10PC-2.7 from Microchip Technology (formerly Atmel) is a 128 Kbit (16,384 × 8) two-wire serial EEPROM with low-voltage operation (2.7V to 5.5V), 400 kHz I²C bus compatibility, and hardware write protection via the WP pin. It delivers 100,000 write cycles, 40-year data retention, and supports page writes up to 64 bytes - used in embedded systems for configuration storage, calibration data logging, and firmware parameter backup.
For engineers reviewing the AT24C128-10PC-2.7 datasheet, AT24C128-10PC-2.7 pinout, AT24C128-10PC-2.7 application, or AT24C128-10PC-2.7 equivalent, key selection considerations include its 2.7V–5.5V supply range, 8-pin PDIP package, 400 kHz I²C timing at 2.7V, WP-enabled hardware data protection, and compatibility with cascaded multi-device I²C buses.
Technical Context
The AT24C128-10PC-2.7 implements a standard I²C-compatible 2-wire interface with open-drain SDA and edge-triggered SCL, supporting bidirectional data transfer and acknowledge polling during internal write cycles. Its address decoding uses A0/A1 pins to enable up to four devices on one bus, with NC pins reserved for package compatibility across SOIC, PDIP, TSSOP, and dBGA variants.
Internally organized as 256 pages of 64 bytes each, it features Schmitt-trigger inputs for noise immunity, self-timed 10 ms max write cycle (tWR), and automatic address roll-over during sequential reads/writes. Standby current is specified at 0.5 µA (max) under 2.7V operation, enabling battery-backed applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 128 Kbit (16,384 × 8) - stores 16 KB of nonvolatile user data |
| Supply Voltage | 2.7V to 5.5V - enables direct interface with 3.3V and 5V microcontrollers without level shifting |
| I²C Clock Frequency | 400 kHz at 2.7V - ensures reliable communication in low-power industrial control nodes |
| Write Cycle Time | 10 ms maximum - defines minimum interval between successive write commands |
| Endurance | 100,000 write cycles - supports frequent field-updatable parameter storage over product lifetime |
| Data Retention | 40 years at +85°C - guarantees long-term integrity of calibration and security keys |
| Package | 8-pin PDIP (8P3) - through-hole mounting compatible with legacy PCB assembly and prototyping |
Pinout & Package
AT24C128-10PC-2.7 is housed in an 8-pin Plastic Dual Inline Package (PDIP), 0.300" wide, per JEDEC MS-001 BA standard. Pin 1 is marked with a notch or dot; leads are tin-lead plated and RoHS-compliant.
| 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; works with A0 to support up to four AT24C128-10PC-2.7 devices on same bus |
| NC | No Connect | Internally unused; must be left floating or tied to GND/VCC per layout guidelines - no electrical function |
| GND | Ground Reference | Primary return path for VCC and I/O signals; requires low-impedance connection to system ground plane |
| VCC | Power Supply | Accepts 2.7V–5.5V; bypass capacitor (0.1 µF) required within 1 cm for stable I²C operation |
| WP | Write Protect Control | Active-high hardware lock: 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 bus with other I²C devices; requires same pull-up as SCL |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | Functional down to 2.7V - eliminates need for voltage regulators in 3.3V systems |
| Page write capability | 64-byte burst writes reduce I²C transaction overhead by >90% vs. byte-by-byte programming |
| Hardware write protection | WP pin provides tamper-resistant memory locking independent of firmware state |
| Noise-immune inputs | Schmitt-trigger + filtering on SCL/SDA prevents spurious writes in electrically noisy environments |
| Cascadable addressing | A0/A1 pins allow up to four AT24C128-10PC-2.7 devices on one I²C bus without address conflict |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed during power-on initialization via I²C; retains values across cold starts and brownouts. Use Value: Eliminates recalibration after firmware updates and ensures traceable, repeatable measurement accuracy per ISO 13485 requirements. | Use Scenario: Holding user-selectable therapy parameters (e.g., dose rate, alarm thresholds) in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, low-power configuration memory updated only during clinician setup; WP pin prevents accidental overwrite during operation. Use Value: Enables regulatory-compliant audit trails and field-upgradable treatment profiles without requiring revalidation of hardware. |
| Automotive Body Control Module | Consumer Appliance Settings |
Use Scenario: Saving seat/mirror position presets and lighting preferences in vehicle BCMs operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Automotive-grade EEPROM interfacing directly with 3.3V CAN/LIN microcontrollers; withstands repeated ignition cycling. Use Value: Meets AEC-Q100 Grade 3 reliability with 40-year retention - avoids costly recall campaigns due to parameter corruption. | Use Scenario: Preserving user-defined cooking modes, timers, and display brightness in smart ovens and microwaves. IC Role / Device Role / Timing Role: Low-quiescent-current (0.5 µA) memory retaining settings during standby; powered from always-on 3.3V rail. Use Value: Delivers instant recall of preferences after power loss while meeting ENERGY STAR standby power limits. |
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 supply, 400 kHz I²C, but uses EIAJ SOIC-8 (8S2) package | Requires PCB redesign for 0.200" SOIC footprint; lacks PDIP option for through-hole prototyping | Select when surface-mount assembly is mandatory and 2.5V min supply suffices |
| ON Semiconductor CAT24C128WI-GT3 | Identical 128 Kbit, 2.7V–5.5V, 400 kHz, and PDIP-8 packaging; differs in endurance (1M cycles) and retention (200 years) | Higher endurance supports high-frequency logging; longer retention eases long-life product certification | Prefer for data loggers or infrastructure equipment where write frequency exceeds 100×/day |
Compared with M24C128-WMN6TP and CAT24C128WI-GT3, AT24C128-10PC-2.7 offers guaranteed PDIP-8 availability, proven 100K-cycle reliability in automotive temperature ranges, and seamless drop-in replacement in legacy 5V/3.3V designs using the same pinout and timing margins.
Availability
AT24C128-10PC-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive body control modules requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for AT24C128-10PC-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 a focus on embedded control and connectivity.
The AT24C128 series belongs to Microchip's serial EEPROM product line, designed specifically for robust, low-power, I²C-based configuration and data storage in space-constrained industrial, medical, and automotive applications.
FAQ
What is the maximum I²C clock frequency supported by AT24C128-10PC-2.7 at 2.7V?
The AT24C128-10PC-2.7 supports up to 400 kHz I²C clock frequency when operated at 2.7V–5.5V. This is confirmed in the AC Characteristics table (page 5) of the datasheet, where fSCL Max = 400 kHz under 2.7V conditions. The device also supports 1 MHz at 5.0V, but AT24C128-10PC-2.7 is rated for the 2.7V variant only.
Does AT24C128-10PC-2.7 require external pull-up resistors on SDA and SCL lines?
Yes, AT24C128-10PC-2.7 requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and speed; the datasheet specifies RL = 1.3 kΩ for 2.5V/5V operation and 10 kΩ for 1.8V mode - though AT24C128-10PC-2.7 operates at 2.7V–5.5V, so 2.2–4.7 kΩ is recommended. This applies to every AT24C128-10PC-2.7 implementation.
How many AT24C128-10PC-2.7 devices can share the same I²C bus?
Up to four AT24C128-10PC-2.7 devices can share a single I²C bus using hardware address pins A0 and A1. Each device's address is determined by tying A0/A1 to VCC or GND, yielding four unique 7-bit addresses (0x50–0x53). The AT24C128-10PC-2.7 datasheet explicitly states this cascading capability in the Device Addressing section (page 9), and it applies identically to the -10PC-2.7 variant.
What is the write protect behavior of AT24C128-10PC-2.7 when the WP pin is left unconnected?
When the WP pin of AT24C128-10PC-2.7 is left unconnected, it is internally pulled down to GND, enabling full read/write functionality. This is documented in the Pin Description section (page 3): "If left unconnected, WP is internally pulled down to GND." Therefore, AT24C128-10PC-2.7 operates in write-enabled mode by default unless WP is actively driven high to VCC - a critical detail for fail-safe design of AT24C128-10PC-2.7 systems.
Is AT24C128-10PC-2.7 qualified for automotive applications?
AT24C128-10PC-2.7 itself is specified for commercial temperature range (0°C to +70°C) and is not automotive-qualified. However, the AT24C128 family includes automotive-grade variants (e.g., AT24C128-10PI-2.7) rated for -40°C to +85°C and qualified to AEC-Q100. The -10PC-2.7 suffix denotes PDIP packaging and commercial temp grade; therefore, AT24C128-10PC-2.7 is intended for industrial and consumer use, not automotive safety-critical systems.
AT24C128-10PC-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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C128-10PC-2.7 FAQ
1.How can I place an order for AT24C128-10PC-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C128-10PC-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 AT24C128-10PC-2.7 reliable?
The price and inventory of AT24C128-10PC-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 AT24C128-10PC-2.7 is usually 5 days.
3.What payment methods are accepted for AT24C128-10PC-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C128-10PC-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C128-10PC-2.7?
AT24C128-10PC-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C128-10PC-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 AT24C128-10PC-2.7?
For technical support, including AT24C128-10PC-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C128-10PC-2.7 requirements.
6.How does Aetrix verify that AT24C128-10PC-2.7 is sourced from the original manufacturer or authorized distributors?
All AT24C128-10PC-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 AT24C128-10PC-2.7 meets industry standards.
7.What is the process for return or replacement of AT24C128-10PC-2.7?
All AT24C128-10PC-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C128-10PC-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 AT24C128-10PC-2.7 part is unused and in its original packaging.
Return procedure for AT24C128-10PC-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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