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Microchip Technology AT24C04-10PC-2.5
- Part No.:
- AT24C04-10PC-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C04-10PC-2.5.pdf
- Description:
- IC EEPROM 4KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,875
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Product details
Overview
AT24C04-10PC-2.5 from Microchip Technology (formerly Atmel) is a 4-kbit (512 × 8) two-wire serial EEPROM optimized for low-voltage embedded systems. It operates from 2.5V to 5.5V, supports 100 kHz I²C bus timing, features hardware write protection via the WP pin, and delivers 1 million write cycles with 100-year data retention - used in industrial sensor calibration storage and power-management configuration memory.
For engineers reviewing the AT24C04-10PC-2.5 datasheet, AT24C04-10PC-2.5 pinout, AT24C04-10PC-2.5 application, or AT24C04-10PC-2.5 equivalent, key selection factors include its 2.5V minimum supply, 16-byte page write capability, SOIC-8/PDIP-8/TSSOP-8 package compatibility, and I²C address flexibility using A2/A1 pins (A0 = NC).
Technical Context
The AT24C04-10PC-2.5 implements a standard I²C-compatible 2-wire interface with Schmitt-triggered, noise-filtered SDA/SCL inputs. Its internal architecture organizes 4096 bits into 32 pages of 16 bytes each, requiring a 9-bit word address for random access.
Device addressing uses hardwired A2 and A1 pins (A0 is no-connect), enabling up to four AT24C04 devices on one bus. Write protection is controlled solely by the WP pin state - tied to VCC for full-array lock, GND for normal operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 kbit (512 × 8 bits), sufficient for firmware revision logs or multi-channel sensor offset tables |
| Supply Voltage Range | 2.5V to 5.5V - enables direct interfacing with 2.5V/3.3V microcontrollers without level shifters |
| I²C Clock Frequency | 100 kHz max at 2.5V - ensures reliable timing margin in noisy industrial environments |
| Page Write Size | 16 bytes per page - reduces write transaction count for block updates like parameter sets |
| Write Cycle Time | 10 ms maximum - defines minimum interval between successive write commands |
| Data Retention | 100 years at +25°C - guarantees long-term integrity of stored calibration or security keys |
| Endurance | 1 million write cycles - supports frequent field-updatable configuration in metering or control applications |
Pinout & Package
AT24C04-10PC-2.5 is supplied in an 8-pin PDIP (Plastic Dual Inline Package) with 0.300" width, RoHS-compliant lead finish, and through-hole mounting. Pin 1 is marked with a notch or dot; package meets JEDEC MS-001 BA standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | No Connect | Not bonded internally; must be left unconnected or tied to GND/VCC - no effect on addressing |
| A1 | Device Address Input | Hardwired to set bit-1 of 3-bit device address; enables up to four AT24C04 units per I²C bus |
| A2 | Device Address Input | Hardwired to set bit-2 of 3-bit device address; used with A1 for unique 7-bit slave address generation |
| GND | Ground Reference | Return path for VCC and signal logic; requires low-impedance connection to system ground plane |
| VCC | Power Supply | Primary supply input (2.5–5.5V); bypass capacitor (0.1 µF) recommended near pin for noise suppression |
| WP | Write Protect Control | Active-high hardware lock: VCC = full-array write disable; GND = full read/write access |
| SCL | Serial Clock Input | Positive-edge clock for data transfer; requires external pull-up resistor (typically 4.7 kΩ) |
| SDA | Serial Data I/O | Open-drain bidirectional bus line; shares pull-up with other I²C devices on same segment |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | Functional down to 2.5V supply - eliminates need for voltage translators in 2.5V/3.3V systems |
| Noise-immune inputs | Schmitt-trigger + filtering on SDA/SCL - rejects >100 ns glitches common in motor-driven or relay-switching environments |
| Hardware write protection | WP pin directly disables all write operations - prevents accidental overwrites during power transients or firmware faults |
| Partial page writes | Allows writing 1–16 bytes within a page without erasing adjacent data - preserves integrity of mixed-parameter blocks |
| Self-timed write cycle | Internal 10 ms timeout - relieves host MCU from polling or fixed delays; ACK polling supported for synchronization |
Applications
| Industrial Sensor Calibration | Smart Meter Configuration Storage |
|---|---|
Use Scenario: Storing factory-trimmed temperature/pressure sensor offsets and linearization coefficients across operating ranges. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed during boot and periodic self-test; I²C reads occur at <100 Hz during initialization. Use Value: Eliminates external trimming components and enables field recalibration without firmware update - leveraging 1M endurance and 100-year retention. |
Use Scenario: Holding tariff schedules, pulse constants, and communication module settings in electricity/water meters deployed for >15 years. IC Role / Device Role / Timing Role: Secure configuration vault; write-protected via WP during normal operation to prevent tampering or corruption. Use Value: Guarantees parameter persistence across battery-backed power loss and thermal cycling - validated for -40°C to +85°C industrial range. |
| Embedded Power Management | Consumer Appliance State Memory |
Use Scenario: Recording last-known power state (e.g., output voltage/current limits, fault history) in DC-DC controllers after unexpected shutdown. IC Role / Device Role / Timing Role: Fast-access backup memory; writes triggered by brown-out detection interrupt with <10 ms latency tolerance. Use Value: Enables graceful recovery without manual reset - using 16-byte page writes to log multiple parameters atomically. |
Use Scenario: Saving user preferences (e.g., timer settings, temperature presets, child lock status) in washing machines and HVAC remotes. IC Role / Device Role / Timing Role: Low-power configuration store; accessed only during power-on or button press - standby current ≤4 µA at 2.5V. Use Value: Extends battery life in coin-cell-powered remotes while ensuring settings survive 10+ years of shelf storage. |
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-2.5 | Same electrical specs but rated for -40°C to +85°C industrial temperature range; identical pinout and timing | Required for outdoor or under-hood automotive/industrial deployments where ambient exceeds 70°C | Select when extended temperature operation is mandatory; otherwise AT24C04-10PC-2.5 suffices for commercial-grade systems. |
| M24C04-RMN6TP | 4-kbit I²C EEPROM from STMicroelectronics; 1.7–5.5V supply, 400 kHz @ 5V, 16-byte page, same SOIC-8/PDIP-8 footprints | Offers higher speed at 5V but reduced noise immunity (no Schmitt triggers); different device address mapping (A0/A1/A2 all active) | Use when migrating legacy designs with ST-based BOMs; verify address conflict and timing margins before drop-in replacement. |
Compared with AT24C04-10PC-2.5, the AT24C04-10PI-2.5 extends thermal reliability without changing layout or firmware, while M24C04-RMN6TP provides faster 5V operation but requires validation of input threshold compatibility and bus arbitration behavior.
Availability
AT24C04-10PC-2.5 is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter configuration storage, and embedded power management requiring stable component supply across long production lifecycles.
Supply support for AT24C04-10PC-2.5 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 maintains full technical and manufacturing continuity for the AT24Cxx EEPROM family.
The AT24C04-10PC-2.5 belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-power nonvolatile storage in space-constrained embedded systems with stringent longevity requirements.
FAQ
What is the maximum I²C clock frequency supported by AT24C04-10PC-2.5?
The AT24C04-10PC-2.5 supports up to 100 kHz I²C clock frequency when operated at 2.5V supply. This is specified in the AC Characteristics table under fSCL for 2.5V/2.7V/1.8V versions. At 5V, it supports 400 kHz, but AT24C04-10PC-2.5 is rated for 2.5–5.5V operation with 100 kHz guaranteed across its full voltage range.
How many AT24C04-10PC-2.5 devices can share the same I²C bus?
Up to four AT24C04-10PC-2.5 devices can be addressed on a single I²C bus. This is achieved using the A2 and A1 pins for hardwired device addressing; A0 is not connected and plays no role in addressing for this part. Each combination of A2/A1 yields a unique 7-bit slave address.
Does AT24C04-10PC-2.5 require external pull-up resistors on SDA and SCL lines?
Yes, AT24C04-10PC-2.5 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 100 kHz operation with moderate trace length.
What happens to the AT24C04-10PC-2.5 when the WP pin is left floating?
The WP pin of AT24C04-10PC-2.5 must not be left floating. If unconnected, its state is undefined and may result in intermittent or complete write protection failure. The datasheet specifies WP must be actively driven to either VCC (for full write protection) or GND (for normal read/write operation) - a pull-down or pull-up resistor is required if not controlled by a GPIO.
Can AT24C04-10PC-2.5 perform partial page writes, and what is the benefit?
Yes, AT24C04-10PC-2.5 supports partial page writes - writing 1 to 16 bytes within a single 16-byte page without affecting other bytes in that page. This avoids unnecessary erase-before-write overhead and preserves adjacent configuration data during targeted updates, improving system robustness and reducing write latency.
AT24C04-10PC-2.5 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:
- 2.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C04-10PC-2.5 FAQ
1.How can I place an order for AT24C04-10PC-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C04-10PC-2.5 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 AT24C04-10PC-2.5 reliable?
The price and inventory of AT24C04-10PC-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C04-10PC-2.5 is usually 5 days.
3.What payment methods are accepted for AT24C04-10PC-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C04-10PC-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C04-10PC-2.5?
AT24C04-10PC-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C04-10PC-2.5 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 AT24C04-10PC-2.5?
For technical support, including AT24C04-10PC-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C04-10PC-2.5 requirements.
6.How does Aetrix verify that AT24C04-10PC-2.5 is sourced from the original manufacturer or authorized distributors?
All AT24C04-10PC-2.5 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 AT24C04-10PC-2.5 meets industry standards.
7.What is the process for return or replacement of AT24C04-10PC-2.5?
All AT24C04-10PC-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C04-10PC-2.5, 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 AT24C04-10PC-2.5 part is unused and in its original packaging.
Return procedure for AT24C04-10PC-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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