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Microchip Technology AT24C04-10PI-2.5
- Part No.:
- AT24C04-10PI-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C04-10PI-2.5.pdf
- Description:
- IC EEPROM 4KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,087
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Product details
Overview
AT24C04-10PI-2.5 from Microchip Technology (formerly Atmel) is a 4-kbit I²C-compatible serial EEPROM organized as 512 words × 8 bits, operating from 2.5V to 5.5V, with 100 kHz bus speed, write-protect pin, and industrial temperature range (–40°C to +85°C). It serves as nonvolatile configuration storage in embedded controllers, power management units, and sensor calibration modules.
For engineers reviewing the AT24C04-10PI-2.5 datasheet, AT24C04-10PI-2.5 pinout, AT24C04-10PI-2.5 application, or AT24C04-10PI-2.5 equivalent, key selection criteria include voltage compatibility (2.5V min), page-write capability (16-byte pages), endurance (1 million cycles), data retention (100 years), and industrial-grade thermal performance.
Technical Context
The AT24C04-10PI-2.5 implements a two-wire I²C interface with Schmitt-trigger inputs and noise-filtered SCL/SDA lines, supporting standard-mode (100 kHz) operation at 2.5V. Its internal address space spans 9-bit word addressing across 32 pages of 16 bytes each.
Hardware write protection is enforced via the dedicated WP pin, which disables all write operations when pulled high. The device uses open-drain SDA with external pull-up and supports both byte-write and page-write protocols, with self-timed internal write cycles capped at 10 ms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 kbit (512 × 8-bit words), enabling compact firmware parameter storage without external address latches |
| Supply Voltage Range | 2.5V to 5.5V - supports direct interfacing with 2.5V, 3.3V, and 5V microcontrollers without level-shifting |
| I²C Clock Frequency | 100 kHz max at 2.5V - ensures reliable timing margin in noisy industrial environments |
| Write Cycle Time | ≤10 ms - defines minimum interval between write commands; requires polling or timeout handling in host firmware |
| Endurance | 1 million write cycles - supports frequent recalibration or logging in field-deployed equipment |
| Data Retention | 100 years at 25°C - guarantees long-term validity of stored calibration coefficients or security keys |
| Operating Temperature | –40°C to +85°C - qualified for industrial control, automotive body electronics, and outdoor IoT nodes |
Pinout & Package
AT24C04-10PI-2.5 is housed in an 8-lead JEDEC SOIC package (8S1), measuring 4.9 mm × 3.9 mm × 1.75 mm, with gull-wing leads and 1.27 mm pitch. Pin 1 is marked by a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | No Connect (NC) | Not bonded internally; must be left unconnected per AT24C04-specific addressing scheme |
| A1 | Device Address Input | Hard-wired to set one of four possible I²C slave addresses (A2/A1 only used; A0 NC) |
| A2 | Device Address Input | Combined with A1 to support up to four AT24C04 devices on same I²C bus |
| GND | Ground Reference | Return path for VCC and signal logic; requires low-impedance connection to system ground plane |
| VCC | Power Supply | Accepts 2.5V–5.5V; decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin |
| WP | Write Protect Control | Active-high hardware lock: tied to VCC to disable writes, GND to enable full read/write access |
| SCL | I²C Clock Input | Positive-edge sampled clock; requires external pull-up; Schmitt trigger enables noise immunity |
| SDA | I²C Bidirectional Data | Open-drain output; must be wire-ORed with other I²C devices using shared pull-up resistor |
Key Features
| Feature | Design Value |
|---|---|
| 16-byte Page Write | Reduces I²C transaction overhead by up to 15× vs. byte-write for contiguous data blocks (e.g., sensor calibration tables) |
| Hardware Write Protection | Prevents accidental overwrites during power transients or firmware faults via dedicated WP pin |
| Schmitt Trigger Inputs | Ensures clean signal sampling on SCL/SDA despite slow-rising or noisy waveforms in electrically harsh environments |
| Industrial Temperature Range | Validated operation from –40°C to +85°C supports deployment in motor drives, PLCs, and outdoor gateways |
| Low Standby Current | 4 µA max at 2.5V enables multi-year battery life in always-on monitoring nodes with infrequent writes |
Applications
| Smart Energy Meters | Industrial PLC Modules |
|---|---|
Use Scenario: Storing tariff schedules, metering calibration constants, and firmware update flags across power cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration register bank accessed via I²C during boot and runtime reconfiguration. Use Value: Guarantees 100-year data retention for regulatory compliance logs and eliminates need for battery-backed SRAM. |
Use Scenario: Holding I/O mapping tables, PID tuning parameters, and diagnostic history in programmable logic controllers. IC Role / Device Role / Timing Role: Persistent parameter store updated only during commissioning or maintenance mode. Use Value: Withstands 1M write cycles, enabling daily recalibration without wear-out concerns in factory automation systems. |
| Automotive Body Controllers | Medical Sensor Calibration |
Use Scenario: Saving seat position memory, mirror presets, and lighting profiles in vehicle body control modules. IC Role / Device Role / Timing Role: I²C-configurable memory mapped into microcontroller's peripheral address space for fast access. Use Value: Industrial temp rating (–40°C to +85°C) ensures reliability under hood temperature extremes and cold-soak conditions. |
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog front-end sensors in portable diagnostics devices. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage location for calibration data referenced at every power-on reset. Use Value: Hardware WP pin prevents field corruption of critical calibration values during firmware updates or ESD events. |
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-2.7 | Wider supply range (2.7V–5.5V); identical pinout, timing, and memory map | Less suitable for 2.5V-only systems; may require voltage translation in 2.5V-only designs | Select only if system VCC can dip below 2.5V but stays ≥2.7V |
| M24C04-RMN6TP | STMicroelectronics 4-kbit EEPROM; same 8-lead SOIC package, 100 kHz @ 2.5V, but no WP pin | Lacks hardware write protection - requires software-based locking or external logic for secure writes | Choose when cost sensitivity outweighs need for hardware-level write safety |
Compared with AT24C04-10PI-2.5, the AT24C04-10PI-2.7 offers broader voltage tolerance but cannot operate down to 2.5V, while M24C04-RMN6TP sacrifices hardware write protection for lower unit cost and alternate qualification.
Availability
AT24C04-10PI-2.5 is available at Aetrix Electronics and suitable for industrial control systems, smart metering platforms, and automotive body electronics requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AT24C04-10PI-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, delivering high-reliability nonvolatile memory solutions since 1990.
The AT24Cxx series was designed specifically for low-power, board-space-constrained embedded systems needing robust, pin-compatible serial EEPROMs with industrial-grade reliability and multiple voltage options.
FAQ
What is the maximum I²C clock frequency supported by AT24C04-10PI-2.5?
The AT24C04-10PI-2.5 supports up to 100 kHz I²C clock frequency when operated at 2.5V. This is specified in the AC Characteristics table under fSCL for 2.7-/2.5-/1.8-volt operation. At 5.0V, it supports 400 kHz, but the -2.5 suffix confirms this variant is characterized and guaranteed for 100 kHz at its minimum 2.5V supply.
Does AT24C04-10PI-2.5 support partial page writes?
Yes, AT24C04-10PI-2.5 supports partial page writes: up to 16 bytes can be written in a single page-write cycle, and fewer than 16 bytes may be sent - the internal address counter increments automatically, wrapping within the current 16-byte page boundary. This is explicitly stated in the Features section and confirmed in the Page Write description.
What is the function of the A0 pin on AT24C04-10PI-2.5?
On AT24C04-10PI-2.5, the A0 pin is a no-connect (NC) terminal. Per the Pin Description and Device Addressing sections, only A2 and A1 are used for hard-wired device addressing; A0 is not bonded and must remain unconnected to ensure correct I²C address decoding and avoid bus contention.
How does the Write Protect (WP) pin behave on AT24C04-10PI-2.5?
When WP is pulled high (to VCC), AT24C04-10PI-2.5 disables all write operations - including byte-write, page-write, and write of the entire 4-kbit array - while permitting unrestricted reads. When WP is grounded, full read/write functionality is enabled. This behavior is defined in the WP Pin Status table and applies uniformly across the AT24C04 family.
Is AT24C04-10PI-2.5 compatible with 1.8V I²C systems?
No, AT24C04-10PI-2.5 is not compatible with 1.8V I²C systems. Its suffix "-2.5" denotes a 2.5V–5.5V operating range. For 1.8V operation, the correct variant is AT24C04-10PI-1.8, which is separately characterized for 1.8V–5.5V and 100 kHz operation - the -2.5 version lacks guaranteed timing or input threshold compliance at 1.8V.
AT24C04-10PI-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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C04-10PI-2.5 FAQ
1.How can I place an order for AT24C04-10PI-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C04-10PI-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 AT24C04-10PI-2.5 reliable?
The price and inventory of AT24C04-10PI-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 AT24C04-10PI-2.5 is usually 5 days.
3.What payment methods are accepted for AT24C04-10PI-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C04-10PI-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C04-10PI-2.5?
AT24C04-10PI-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C04-10PI-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 AT24C04-10PI-2.5?
For technical support, including AT24C04-10PI-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C04-10PI-2.5 requirements.
6.How does Aetrix verify that AT24C04-10PI-2.5 is sourced from the original manufacturer or authorized distributors?
All AT24C04-10PI-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 AT24C04-10PI-2.5 meets industry standards.
7.What is the process for return or replacement of AT24C04-10PI-2.5?
All AT24C04-10PI-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C04-10PI-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 AT24C04-10PI-2.5 part is unused and in its original packaging.
Return procedure for AT24C04-10PI-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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