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Microchip Technology AT24C04A-10PI-2.5
- Part No.:
- AT24C04A-10PI-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C04A-10PI-2.5.pdf
- Description:
- IC EEPROM 4KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,166
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Product details
Overview
AT24C04A-10PI-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 industrial temperature range (−40°C to +85°C). It supports 100 kHz I²C communication, 16-byte page writes, and delivers 1 million write cycles with 100-year data retention - used for configuration storage in embedded controllers, power supplies, and sensor modules.
For engineers reviewing the AT24C04A-10PI-2.5 datasheet, AT24C04A-10PI-2.5 pinout, AT24C04A-10PI-2.5 application, or AT24C04A-10PI-2.5 equivalent, key selection considerations include its 2.5V minimum supply, WP pin-based hardware write protection, 8-pin PDIP package, industrial-grade reliability, and compatibility with microcontroller I²C peripherals requiring nonvolatile parameter storage.
Technical Context
The AT24C04A-10PI-2.5 implements a two-wire I²C interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and open-drain bidirectional data transfer. Its internal 512-word × 8-bit array uses 9-bit addressing and supports both byte and 16-byte page writes with automatic address incrementing within pages.
Device addressing uses A2 and A1 pins (A0 is NC), enabling up to four AT24C04A devices on one bus. The WP pin enables hardware-level write protection of the full 4K array when pulled high, while standby current is specified at 4 µA max at 2.5V - critical for battery-backed systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4096 bits (512 × 8 words), sufficient for storing calibration data, device IDs, or firmware flags in compact embedded systems |
| Supply Voltage Range | 2.5V to 5.5V - supports direct interfacing with 2.5V, 3.3V, and 5V logic domains without level shifting |
| I²C Clock Frequency | 100 kHz maximum - ensures robust timing margin in electrically noisy industrial environments |
| Write Cycle Time | 10 ms max - defines minimum interval between successive write operations; impacts firmware write-sequence timing design |
| Endurance & Retention | 1 million write cycles / 100 years data retention - meets long-life requirements for field-deployed equipment with infrequent but critical updates |
| Operating Temperature | −40°C to +85°C - qualified for industrial control, automotive body electronics, and outdoor IoT nodes |
| Standby Current | 4 µA max at 2.5V - enables multi-year operation on coin-cell batteries in always-on monitoring applications |
Pinout & Package
AT24C04A-10PI-2.5 is supplied in an 8-lead, 0.300" wide plastic dual in-line package (PDIP), per JEDEC MS-001 BA standard, with 0.100" lead pitch and through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | No-connect (NC) | Internally unused; must be left unconnected - not tied to VCC/GND to avoid unintended device addressing conflicts |
| A1 | Device Address Input | Hardwired address bit; combines with A2 to select one of four possible addresses on shared I²C bus |
| A2 | Device Address Input | Hardwired address bit; determines base device address (1010xx0/1) for multi-device bus topology |
| GND | Ground Reference | Return path for VCC and I/O; requires low-impedance connection to system ground plane to maintain I²C signal integrity |
| VCC | Power Supply | 2.5V–5.5V input; decoupling capacitor (0.1 µF ceramic) required within 1 cm to suppress switching noise during write cycles |
| WP | Write Protect Control | Active-high hardware lock: logic high disables all write operations to entire memory array, preventing accidental overwrites |
| SCL | Serial Clock Input | Master-generated clock; open-drain compatible with external pull-up; timing must meet tLOW/tHIGH min/max per AC specs |
| SDA | Serial Data I/O | Bidirectional open-drain line; requires external pull-up; supports ACK polling during write cycle completion detection |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Write Protection | WP pin enables full-array lockout without firmware intervention - essential for safety-critical or regulatory-compliant boot configuration storage |
| 16-Byte Page Write Mode | Reduces I²C transaction overhead by up to 16× vs. byte writes - accelerates bulk parameter updates in factory programming or field calibration |
| 100-Year Data Retention | Guaranteed data integrity across product lifetime without refresh - eliminates need for periodic read-back verification in maintenance-free deployments |
| ESD Robustness | >3000V HBM - withstands handling and board assembly stresses without special ESD precautions beyond standard IPC guidelines |
| Noise-Suppressed Inputs | Schmitt-trigger + filtering on SDA/SCL - rejects fast transients and improves immunity in motor-drive or relay-switching environments |
Applications
| Industrial PLC Configuration Storage | Smart Sensor Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping, scaling factors, and alarm thresholds in programmable logic controllers deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed via microcontroller I²C during power-up and runtime reconfiguration. Use Value: Enables field-upgradable settings without firmware reflashing; WP pin prevents corruption during electrical noise events near contactors or VFDs. | Use Scenario: Holding factory-trimmed offset/gain coefficients and temperature compensation tables in MEMS pressure or humidity sensors. IC Role / Device Role / Timing Role: Persistent parameter store read once at startup and cached in RAM; write occurs only during calibration or recalibration procedures. Use Value: Achieves ±0.1% measurement accuracy over temperature; 1M endurance supports >10 recalibrations over 10-year product life. |
| Medical Device Usage Logs | Power Supply Fault History |
Use Scenario: Recording operational hours, self-test results, and error codes in portable diagnostic equipment subject to FDA 21 CFR Part 11 audit requirements. IC Role / Device Role / Timing Role: Secure event logger with WP-enabled write-lock after final log entry to satisfy data integrity compliance. Use Value: Provides tamper-evident, time-stamped history traceable to device serial number - meets medical device data retention mandates. | Use Scenario: Capturing overvoltage, overcurrent, and thermal fault timestamps in AC/DC power supplies for predictive maintenance analysis. IC Role / Device Role / Timing Role: Ring-buffer memory managed by power controller MCU; wraps on overflow to retain latest 128 fault entries. Use Value: Enables root-cause analysis without external memory; 2.5V operation allows direct interface with low-power supervisor ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C04D-SSHM-T | Same 4K-bit capacity, 1.7V–5.5V supply, 1 MHz I²C, SOIC-8 package; no WP pin | Lacks hardware write protection; higher speed but reduced noise immunity | Select when higher throughput is prioritized over robustness in benign environments |
| BR24G04FJ-WE2 | 4K-bit, 1.6V–5.5V, 1 MHz I²C, TSSOP-8; includes software write protection and page write lock | Software-configurable protection; smaller footprint but requires firmware support for security | Choose for space-constrained designs needing flexible access control via command protocol |
Compared with AT24C04A-10PI-2.5, AT24C04D-SSHM-T offers faster I²C but removes hardware WP - increasing firmware complexity for secure writes - while BR24G04FJ-WE2 trades physical pin simplicity for software-defined protection granularity in miniaturized layouts.
Availability
AT24C04A-10PI-2.5 is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, smart sensor modules, and power management units requiring stable component supply across extended temperature and long product lifecycles.
Supply support for AT24C04A-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 is a global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with emphasis on reliability and long-term product support.
The AT24C04A series belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-power embedded systems requiring guaranteed data integrity under industrial operating conditions.
FAQ
What is the maximum I²C clock frequency supported by AT24C04A-10PI-2.5?
The AT24C04A-10PI-2.5 supports up to 100 kHz I²C clock frequency under its 2.5V–5.5V supply range. This limit ensures reliable timing margins in electrically noisy industrial environments. While higher-speed variants like AT24C04D support 1 MHz, AT24C04A-10PI-2.5 maintains robustness over temperature and voltage extremes at the expense of raw speed - a deliberate trade-off for mission-critical storage.
Does AT24C04A-10PI-2.5 require external pull-up resistors on SDA and SCL lines?
Yes, AT24C04A-10PI-2.5 requires external pull-up resistors on both SDA and SCL lines because it uses open-drain outputs. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and desired rise time. The AT24C04A-10PI-2.5 datasheet specifies maximum input capacitance (6 pF for SCL, 8 pF for SDA), so pull-up strength must be selected to meet tR/tF timing requirements under worst-case VCC and temperature conditions.
How does the Write Protect (WP) pin function on AT24C04A-10PI-2.5?
On AT24C04A-10PI-2.5, the WP pin provides hardware-level write protection: when pulled high (to VCC), it disables all write operations to the full 4K memory array. When grounded, normal read/write access is enabled. This behavior is independent of I²C commands - no software interaction is needed. The AT24C04A-10PI-2.5 datasheet confirms WP asserts protection across the entire memory space, unlike earlier AT24C02 variants with partial-array protection.
What package type is used for AT24C04A-10PI-2.5?
AT24C04A-10PI-2.5 uses an 8-lead, 0.300" wide plastic dual in-line package (PDIP), designated as package code 8P3 per Microchip's ordering information. This through-hole package features 0.100" lead pitch and complies with JEDEC MS-001 BA standards - selected for ease of prototyping, manual soldering, and legacy board compatibility in industrial control hardware.
Is AT24C04A-10PI-2.5 suitable for automotive applications?
AT24C04A-10PI-2.5 is rated for industrial temperature (−40°C to +85°C) and is not AEC-Q100 qualified. While it may function in some automotive body electronics applications, Microchip does not certify AT24C04A-10PI-2.5 for under-hood or safety-critical automotive use. For such applications, designers should select automotive-grade alternatives like the AT24C04C-SSHM-T (AEC-Q100 Grade 2) - AT24C04A-10PI-2.5 remains appropriate for industrial, medical, and commercial systems meeting its temp/voltage specs.
AT24C04A-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
AT24C04A-10PI-2.5 FAQ
1.How can I place an order for AT24C04A-10PI-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C04A-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 AT24C04A-10PI-2.5 reliable?
The price and inventory of AT24C04A-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 AT24C04A-10PI-2.5 is usually 5 days.
3.What payment methods are accepted for AT24C04A-10PI-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C04A-10PI-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C04A-10PI-2.5?
AT24C04A-10PI-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C04A-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 AT24C04A-10PI-2.5?
For technical support, including AT24C04A-10PI-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C04A-10PI-2.5 requirements.
6.How does Aetrix verify that AT24C04A-10PI-2.5 is sourced from the original manufacturer or authorized distributors?
All AT24C04A-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 AT24C04A-10PI-2.5 meets industry standards.
7.What is the process for return or replacement of AT24C04A-10PI-2.5?
All AT24C04A-10PI-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C04A-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 AT24C04A-10PI-2.5 part is unused and in its original packaging.
Return procedure for AT24C04A-10PI-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24C04A-10PI-2.5 Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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