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Microchip Technology AT24C04A-10PC-2.5
- Part No.:
- AT24C04A-10PC-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C04A-10PC-2.5.pdf
- Description:
- IC EEPROM 4KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,120
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Product details
Overview
AT24C04A-10PC-2.5 from Microchip Technology (formerly Atmel) is a 4K-bit (512 × 8) I²C-compatible serial EEPROM with hardware write protection, low-voltage operation (2.5V to 5.5V), and 100 kHz clock compatibility. It features 16-byte page writes, 1 million write cycles endurance, and 100-year data retention - deployed in industrial control panels, smart metering firmware storage, and embedded sensor calibration memory.
For engineers reviewing the AT24C04A-10PC-2.5 datasheet, AT24C04A-10PC-2.5 pinout, AT24C04A-10PC-2.5 application, or AT24C04A-10PC-2.5 equivalent, key selection criteria include VCC range (2.5–5.5V), page size (16 bytes), WP pin functionality, standby current (4 µA at 2.5V), and PDIP-8 package compatibility with legacy through-hole designs.
Technical Context
The AT24C04A-10PC-2.5 implements a two-wire I²C interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and supports bidirectional data transfer using open-drain signaling. Its device addressing uses A2 and A1 pins for hardwired bus positioning (up to four devices per bus), while A0 is NC.
Write operations support both byte and 16-byte page modes with self-timed internal write cycles (≤10 ms). The WP pin enables hardware-level protection of the upper 2K array when pulled high, and the EEPROM enters low-power standby mode after STOP condition receipt or power-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4096 bits (512 words × 8 bits), organized as 256 pages of 2 bytes each |
| Supply Voltage Range | 2.5V to 5.5V - enables direct interfacing with 2.5V/3.3V microcontrollers without level shifters |
| Max Clock Frequency | 100 kHz at 2.5V - ensures reliable timing margin under low-voltage conditions |
| Page Write Size | 16 bytes - reduces I²C transaction count for bulk configuration updates |
| Write Endurance | 1,000,000 cycles - supports frequent field calibration or logging in industrial equipment |
| Data Retention | 100 years at 25°C - guarantees long-term firmware parameter integrity across product lifecycle |
| Standby Current | 4 µA at VCC = 2.5V - minimizes quiescent power in battery-backed systems |
Pinout & Package
AT24C04A-10PC-2.5 is supplied in an 8-pin PDIP (Plastic Dual Inline Package), 0.300" wide, with through-hole mounting. Pin 1 is marked by notch or dot; leads are tin-lead plated for solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | No Connect (NC) | Not bonded internally; must be left unconnected per datasheet |
| A1 | Device Address Input | Hardwired address bit enabling up to four AT24C04A devices on one I²C bus |
| A2 | Device Address Input | Hardwired address bit used with A1 for unique 2-bit device addressing |
| GND | Ground Reference | Return path for VCC and signal logic; requires low-impedance PCB connection |
| VCC | Power Supply | Accepts 2.5V–5.5V; decoupling capacitor (0.1 µF) required near pin |
| WP | Write Protect Control | Active-high hardware lock: disables writes to upper 2K array when tied to VCC |
| SCL | Serial Clock Input | Positive-edge sampled clock; requires external pull-up resistor (typically 4.7 kΩ) |
| SDA | Serial Data I/O | Bidirectional open-drain line; shared across I²C bus with pull-up resistor |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Write Protection | WP pin disables writes to upper 2K memory block when asserted - prevents accidental firmware corruption during power transitions |
| Noise-Immune Interface | Schmitt-trigger inputs + input filtering suppress EMI-induced glitches on SDA/SCL - critical for industrial motor drive environments |
| Low-Voltage Operation | Guaranteed 100 kHz I²C communication down to 2.5V - eliminates need for voltage translators in mixed-supply systems |
| Page Write Efficiency | 16-byte page buffer allows single I²C transaction to program full page - cuts write time vs. byte-by-byte by >85% |
| High Reliability | 1M write cycles and 100-year data retention validated per JEDEC standards - suitable for unattended infrastructure deployments |
Applications
| Industrial PLC Configuration Storage | Smart Energy Meter Firmware Backup |
|---|---|
Use Scenario: Storing calibrated sensor offsets, PID tuning parameters, and operational thresholds in programmable logic controllers operating in factory-floor environments with electrical noise and wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed via I²C during boot and runtime reconfiguration; WP pin secured to prevent unintended overwrites during brown-out events. Use Value: Enables field-upgradable control logic without requiring flash reprogramming; 4 µA standby current extends backup battery life beyond 10 years. |
Use Scenario: Retaining tariff tables, billing history, and cryptographic keys in ANSI C12.22-compliant electricity meters exposed to outdoor thermal cycling and humidity. IC Role / Device Role / Timing Role: Secure, low-power parameter store interfaced to metrology SoC; WP pin tied to system supervisor to lock memory during power-fail sequences. Use Value: Meets IEC 62056-21 data integrity requirements; 100-year retention ensures meter lifetime compliance without periodic recalibration. |
| Medical Diagnostic Device Calibration | Automotive Body Control Module Settings |
Use Scenario: Holding factory-calibrated ADC gain/offset coefficients and user-adjusted display brightness profiles in portable ultrasound and ECG units. IC Role / Device Role / Timing Role: I²C-connected persistent memory mapped into microcontroller's data space; accessed only during startup or service mode. Use Value: Eliminates need for external programming fixtures; 1M endurance supports >10,000 field calibrations over device lifetime. |
Use Scenario: Storing seat/mirror position presets, lighting profiles, and door lock behavior in 12V automotive BCMs with transient-suppressed power rails. IC Role / Device Role / Timing Role: Low-voltage EEPROM interfaced to 3.3V CAN microcontroller; WP pin controlled by power management IC to freeze settings during ignition cycling. Use Value: Operates reliably across 2.5V cold-crank condition; 2.5V–5.5V range avoids separate LDO for memory rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M24C04-RMN6TP | 4K-bit, 100 kHz max, SO8 package, 1.7–5.5V supply - no WP pin; write protection via software lock bits | Lacks hardware WP; requires firmware coordination for safe multi-threaded access | Choose when board space favors SOIC and system-level write control suffices |
| BR24G04FJ-WE2 | 4K-bit, 400 kHz max, TSSOP8, 1.6–5.5V - includes write-cycle interrupt flag (WCINT) pin | Provides hardware busy indication; supports faster clock rates but requires additional PCB trace | Prefer when real-time status feedback is needed and TSSOP footprint is acceptable |
Compared with M24C04-RMN6TP and BR24G04FJ-WE2, AT24C04A-10PC-2.5 offers deterministic hardware write protection and PDIP-8 compatibility for legacy repair/reflow workflows - critical where mechanical robustness and serviceability outweigh speed or package density.
Availability
AT24C04A-10PC-2.5 is available at Aetrix Electronics and suitable for industrial control systems, smart metering platforms, and medical diagnostic equipment requiring stable component supply, long-lifecycle support, and through-hole assembly compatibility.
Supply support for AT24C04A-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 AT24CxxA EEPROM family. The company specializes in secure, reliable nonvolatile memory solutions for mission-critical applications.
The AT24C04A belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-power embedded systems requiring proven reliability, broad voltage operation, and I²C protocol simplicity.
FAQ
What is the maximum clock frequency supported by AT24C04A-10PC-2.5?
The AT24C04A-10PC-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 denotes qualification for the lower-voltage bin only.
How does the Write Protect (WP) pin function on AT24C04A-10PC-2.5?
On AT24C04A-10PC-2.5, the WP pin provides hardware-level write protection: when pulled high to VCC, it locks the upper 2K (2048-bit) portion of memory against writes while allowing full read access. When grounded, normal read/write operations are enabled across the entire 4K array.
What package type is used for AT24C04A-10PC-2.5?
AT24C04A-10PC-2.5 uses an 8-pin PDIP (Plastic Dual Inline Package), 0.300" wide, with through-hole mounting. The "PC" suffix explicitly denotes this package per Atmel's ordering code convention, confirmed in the AT24C04A Ordering Information table.
Can AT24C04A-10PC-2.5 operate reliably at 2.5V supply?
Yes - AT24C04A-10PC-2.5 is fully characterized and guaranteed for operation from 2.5V to 5.5V. Its DC and AC specifications (including 100 kHz clock, 4 µA standby current, and 10 ms write cycle) are validated across this range, as documented in the "2.5 (VCC = 2.5V to 5.5V)" voltage option row.
What is the memory organization of AT24C04A-10PC-2.5?
AT24C04A-10PC-2.5 contains 4096 bits organized as 512 words of 8 bits each. Internally, it is structured as 256 pages of 2 bytes, requiring a 9-bit word address for random access. Page writes support up to 16 consecutive bytes within the same page boundary.
AT24C04A-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
AT24C04A-10PC-2.5 FAQ
1.How can I place an order for AT24C04A-10PC-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C04A-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 AT24C04A-10PC-2.5 reliable?
The price and inventory of AT24C04A-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 AT24C04A-10PC-2.5 is usually 5 days.
3.What payment methods are accepted for AT24C04A-10PC-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C04A-10PC-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C04A-10PC-2.5?
AT24C04A-10PC-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C04A-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 AT24C04A-10PC-2.5?
For technical support, including AT24C04A-10PC-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C04A-10PC-2.5 requirements.
6.How does Aetrix verify that AT24C04A-10PC-2.5 is sourced from the original manufacturer or authorized distributors?
All AT24C04A-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 AT24C04A-10PC-2.5 meets industry standards.
7.What is the process for return or replacement of AT24C04A-10PC-2.5?
All AT24C04A-10PC-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C04A-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 AT24C04A-10PC-2.5 part is unused and in its original packaging.
Return procedure for AT24C04A-10PC-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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