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Microchip Technology AT24C04-10PI-2.7
- Part No.:
- AT24C04-10PI-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C04-10PI-2.7.pdf
- Description:
- IC EEPROM 4KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,157
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Product details
Overview
AT24C04-10PI-2.7 from Microchip Technology (formerly Atmel) is a 4-kbit I²C-compatible serial EEPROM organized as 512 words × 8 bits, operating from 2.7V to 5.5V with 100 kHz maximum clock frequency and industrial temperature range (–40°C to +85°C). It features hardware write protection via the WP pin, 16-byte page write capability, and Schmitt-trigger inputs for noise immunity-used in embedded system configuration storage, sensor calibration data retention, and power-meter firmware parameter backup.
For engineers reviewing the AT24C04-10PI-2.7 datasheet, AT24C04-10PI-2.7 pinout, AT24C04-10PI-2.7 application, or AT24C04-10PI-2.7 equivalent, key selection criteria include its 2.7V–5.5V supply compatibility, industrial-grade reliability (1M write cycles, 100-year data retention), 8-pin SOIC/TSSOP/PDIP package options, and I²C bus address flexibility using A2/A1 pins.
Technical Context
The AT24C04-10PI-2.7 implements a two-wire I²C interface with open-drain SDA and active-high SCL, supporting standard-mode (100 kHz) timing at 2.7V–5.5V. Its internal memory is partitioned into 32 pages of 16 bytes each, enabling efficient page-write operations without crossing page boundaries.
Device addressing uses A2 and A1 pins (A0 is NC), allowing up to four AT24C04 devices on a single I²C bus. The WP pin provides hardware-level write protection: tied to VCC disables all writes to the full 4K array, while grounded enables normal read/write access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4096 bits (512 × 8-bit words) - sufficient for storing device IDs, calibration coefficients, or boot configuration flags in resource-constrained systems. |
| Supply Voltage Range | 2.7V to 5.5V - supports direct interfacing with 3.3V microcontrollers and legacy 5V logic without level shifting. |
| I²C Clock Frequency | 100 kHz max - ensures robust operation under noisy industrial conditions while maintaining compatibility with legacy I²C masters. |
| Write Cycle Time | 10 ms max - defines minimum interval between successive write commands; requires polling or timeout handling in firmware. |
| Endurance & Retention | 1 million write cycles / 100 years data retention - validated for long-life applications like utility meters and industrial controllers. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including factory automation and outdoor telemetry nodes. |
| Page Write Size | 16 bytes per page - enables efficient bulk updates (e.g., logging timestamped sensor snapshots) without excessive I²C overhead. |
Pinout & Package
AT24C04-10PI-2.7 is available in 8-lead JEDEC SOIC (8S1), 8-pin PDIP (8P3), and 8-lead TSSOP (8T) packages. All variants share identical pinout and function mapping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | No Connect (NC) | Not used for device addressing; must be left unconnected or tied to GND/VCC (no functional impact). |
| A1 | Device Address Input | Hardwired input determining one bit of 3-bit I²C slave address; enables up to four AT24C04 devices on same bus. |
| A2 | Device Address Input | Hardwired input determining second bit of I²C slave address; used with A1 for multi-device bus topology. |
| GND | Ground Reference | Common return path for VCC, SDA, SCL, and WP; critical for noise immunity and stable I²C signaling. |
| VCC | Power Supply | Primary power rail (2.7–5.5V); powers internal logic and memory array; decoupling capacitor required near pin. |
| WP | Write Protect Control | Active-high hardware lock: high = full-array write disable; low = normal read/write; enables fail-safe firmware update control. |
| SCL | Serial Clock Input | Master-generated clock signal synchronizing all I²C transfers; requires external pull-up resistor (typically 4.7 kΩ). |
| SDA | Serial Data I/O | Open-drain bidirectional bus line for address/data transfer; shared across multiple I²C devices; requires pull-up. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Enables reliable operation in electrically noisy industrial environments by rejecting sub-threshold voltage transients on SCL/SDA. |
| Hardware write protection | WP pin allows deterministic, power-cycle-immune disabling of writes-critical for preventing accidental corruption during firmware updates. |
| 16-byte page write mode | Reduces I²C transaction count by 16× vs. byte writes, lowering bus occupancy and improving throughput in burst-write scenarios. |
| Industrial temperature grade | Validated operation from –40°C to +85°C ensures functionality in uncontrolled enclosures, outdoor gateways, and motor control cabinets. |
| Low standby current | Max 4 µA at 2.7V enables use in battery-backed systems (e.g., smart sensors) with multi-year shelf life requirements. |
Applications
| Smart Energy Metering | Industrial PLC Configuration |
|---|---|
|
Use Scenario: Storing tariff schedules, meter calibration constants, and tamper-event logs in electricity/water/gas meters deployed outdoors. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with infrequent writes and frequent reads; retains data across power loss and thermal cycling. Use Value: Enables regulatory-compliant data integrity via hardware WP pin and 100-year retention-eliminates need for battery-backed SRAM. |
Use Scenario: Saving user-defined I/O mapping, PID tuning parameters, and alarm thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: Configuration memory accessed during PLC boot and runtime reconfiguration; isolated from main program flash. Use Value: Supports field-upgradable settings without firmware reflashing; 1M endurance withstands daily parameter adjustments over 10+ years. |
| Medical Diagnostic Sensor Calibration | Automotive Body Control Module |
|
Use Scenario: Holding factory-calibrated offset/gain coefficients for ECG, pulse oximeter, or blood glucose sensor front-ends. IC Role / Device Role / Timing Role: Read-once-at-boot storage element; write access restricted to certified calibration stations via WP pin control. Use Value: Ensures measurement traceability and prevents unauthorized calibration drift; 2.7V operation matches low-power analog front-end supplies. |
Use Scenario: Storing seat position presets, mirror adjustment profiles, and lighting configuration in automotive BCMs. IC Role / Device Role / Timing Role: Persistent user preference storage updated only during vehicle personalization events; accessed via CAN-to-I²C gateway. Use Value: Survives 12V battery disconnects and cold cranking; industrial temp rating covers under-hood thermal extremes (-40°C to +85°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C04-10PI | Same 4K capacity and pinout, but rated for 4.5–5.5V only (not 2.7V–5.5V); lacks low-voltage operation. | Restricted to 5V systems; unsuitable for mixed-voltage or battery-powered designs requiring 2.7V operation. | Select AT24C04-10PI-2.7 when interfacing with 3.3V or wide-input DC-DC converters. |
| M24C04-RMN6TP | STMicroelectronics 4K I²C EEPROM; identical 2.7–5.5V range and 100 kHz speed, but uses different A0/A1/A2 addressing scheme (A0 functional). | Requires PCB layout change if replacing AT24C04-10PI-2.7 due to A0 pin usage; otherwise drop-in compatible in software. | Choose M24C04-RMN6TP only if dual-sourcing is required and A0 routing can be modified. |
Compared with AT24C04-10PI and M24C04-RMN6TP, the AT24C04-10PI-2.7 uniquely supports 2.7V–5.5V operation without performance trade-offs, maintains full pin compatibility with legacy AT24C04 designs, and delivers guaranteed industrial temperature performance with hardware write protection-making it optimal for new designs targeting voltage flexibility and long-term reliability.
Availability
AT24C04-10PI-2.7 is available at Aetrix Electronics and suitable for smart energy metering, industrial PLC configuration, and medical sensor calibration requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for AT24C04-10PI-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 acquired Atmel in 2016 and continues to manufacture, qualify, and support the AT24C series of I²C EEPROMs with full backward compatibility and extended lifecycle commitments.
The AT24C04 product line delivers cost-effective, low-power serial nonvolatile memory for embedded systems where space, voltage flexibility, and data integrity are critical-targeting industrial control, instrumentation, and consumer electronics.
FAQ
What is the maximum I²C clock frequency supported by AT24C04-10PI-2.7?
The AT24C04-10PI-2.7 supports a maximum I²C clock frequency of 100 kHz when operating within its 2.7V–5.5V supply range. This is specified in the AC Characteristics table under fSCL for 2.7-, 2.5-, and 1.8-volt versions. It does not support 400 kHz operation-that capability is reserved for the 5.0V-only variants (e.g., AT24C04-10PI).
How many AT24C04-10PI-2.7 devices can share the same I²C bus?
Up to four AT24C04-10PI-2.7 devices can coexist on a single I²C bus. This is enabled by hardwiring the A2 and A1 pins to define unique 3-bit device addresses (A0 is NC). Each combination of A2/A1 yields a distinct slave address, allowing concurrent communication without address conflict.
What happens when the WP pin on AT24C04-10PI-2.7 is tied to VCC?
When the WP pin on AT24C04-10PI-2.7 is tied to VCC, the entire 4K memory array is write-protected: all write attempts (byte or page) are ignored, and the device responds only to read operations. This hardware lock remains active across power cycles and provides deterministic protection against firmware errors or voltage glitches.
Does AT24C04-10PI-2.7 support partial page writes?
Yes, AT24C04-10PI-2.7 supports partial page writes. After initiating a page write, the host may transmit fewer than 16 bytes; the EEPROM accepts them sequentially and increments the internal address pointer. Remaining bytes in the 16-byte page retain their prior values-enabling efficient updates of non-contiguous configuration fields.
What package options are available for AT24C04-10PI-2.7?
AT24C04-10PI-2.7 is offered in three industry-standard packages: 8-lead JEDEC SOIC (8S1), 8-pin PDIP (8P3), and 8-lead TSSOP (8T). All share identical pinout, electrical characteristics, and industrial temperature rating (–40°C to +85°C), allowing direct substitution based on board space and assembly requirements.
AT24C04-10PI-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:
- 4Kbit
- Memory Organization:
- 512 x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 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
AT24C04-10PI-2.7 FAQ
1.How can I place an order for AT24C04-10PI-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C04-10PI-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 AT24C04-10PI-2.7 reliable?
The price and inventory of AT24C04-10PI-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 AT24C04-10PI-2.7 is usually 5 days.
3.What payment methods are accepted for AT24C04-10PI-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C04-10PI-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C04-10PI-2.7?
AT24C04-10PI-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C04-10PI-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 AT24C04-10PI-2.7?
For technical support, including AT24C04-10PI-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C04-10PI-2.7 requirements.
6.How does Aetrix verify that AT24C04-10PI-2.7 is sourced from the original manufacturer or authorized distributors?
All AT24C04-10PI-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 AT24C04-10PI-2.7 meets industry standards.
7.What is the process for return or replacement of AT24C04-10PI-2.7?
All AT24C04-10PI-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C04-10PI-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 AT24C04-10PI-2.7 part is unused and in its original packaging.
Return procedure for AT24C04-10PI-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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