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Microchip Technology AT24C04A-10PI-2.7
- Part No.:
- AT24C04A-10PI-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C04A-10PI-2.7.pdf
- Description:
- IC EEPROM 4KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,388
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Product details
Overview
AT24C04A-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, featuring hardware write protection via the WP pin and 100-year data retention. It supports 400 kHz clock rate at 2.7V/5V and delivers 1 million write cycles in industrial temperature range (−40°C to +85°C), used for configuration storage in embedded controllers and sensor calibration modules.
For engineers reviewing the AT24C04A-10PI-2.7 datasheet, AT24C04A-10PI-2.7 pinout, AT24C04A-10PI-2.7 application, or AT24C04A-10PI-2.7 equivalent, key selection factors include its 4K-bit density, PDIP-8 package with hardwired A2/A1 addressing, 16-byte page write capability, and automotive-grade reliability under extended temperature and lead-free compliance.
Technical Context
The AT24C04A-10PI-2.7 implements a two-wire I²C interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and open-drain bidirectional data transfer. Its internal address counter supports current-address, random-address, and sequential read modes, while the WP pin enables hardware-level upper-half array write protection when tied to VCC.
It uses a 9-bit internal word address for 4K organization, with A2 and A1 serving as device address inputs and A0 designated NC. Page writes are limited to 16 bytes per page boundary, and self-timed write cycles complete within 5 ms maximum, during which all inputs are disabled until acknowledge polling confirms completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4096 bits (512 × 8), enabling storage of firmware parameters or calibration coefficients in space-constrained designs. |
| Supply Voltage Range | 2.7V to 5.5V - compatible with legacy 3.3V and 5V logic systems without level-shifting. |
| I²C Clock Rate | Up to 400 kHz at 2.7V/5V - supports fast configuration loading in real-time control loops. |
| Page Write Size | 16 bytes per page - reduces bus transactions for bulk updates compared to byte-write-only devices. |
| Write Endurance | 1 million cycles - suitable for field-updatable systems requiring frequent parameter logging. |
| Data Retention | 100 years at +25°C - ensures long-term validity of stored settings across product lifecycle. |
| Operating Temperature | −40°C to +85°C - qualified for industrial automation, automotive body electronics, and outdoor IoT nodes. |
| Write Protect Logic | WP = VCC locks upper 2K array; WP = GND enables full read/write - provides selective firmware protection without software overhead. |
Pinout & Package
AT24C04A-10PI-2.7 is supplied in an 8-pin Plastic Dual Inline Package (PDIP), 0.300" wide, with standard through-hole mounting and JEDEC MS-001 compliant dimensions. Pin 1 is located at the top-left corner with notch or dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | No-connect (NC) | Not internally connected; must be left floating or tied to any potential - no effect on device addressing. |
| A1, A2 | Device Address Inputs | Hardwired to define one of four possible I²C slave addresses (1010A2A1xx) on shared bus. |
| GND | Ground Reference | Return path for VCC and signal logic; requires low-impedance connection to minimize noise coupling into SDA/SCL. |
| VCC | Power Supply | Accepts 2.7–5.5V; decoupling capacitor (0.1 µF ceramic) required within 1 cm for stable I²C timing. |
| WP | Hardware Write Protect | Active-high enable: ties upper 2K array read-only when pulled to VCC; enables full access when grounded. |
| SCL | Serial Clock Input | Positive-edge sampled clock; requires external pull-up; max 400 kHz operation with 300 ns fall time compliance. |
| SDA | Serial Data I/O | Open-drain bidirectional line; shares bus with other I²C devices; requires external pull-up resistor (1–10 kΩ). |
Key Features
| Feature | Design Value |
|---|---|
| Two-wire Serial Interface | Reduces PCB routing complexity vs SPI; supports up to 4 devices on same bus using A1/A2 address pins. |
| 16-byte Page Write Mode | Enables efficient firmware patching by writing 16 bytes per transaction instead of 16 separate byte writes. |
| Schmitt Trigger Inputs | Improves noise immunity on SDA/SCL lines in electrically noisy environments like motor drives or power supplies. |
| Self-timed Write Cycle | Eliminates need for external timing control; host can poll ACK after STOP to detect write completion. |
| Automotive-Grade Qualification | Meets extended temperature and reliability requirements for non-safety-critical automotive subsystems. |
Applications
| Industrial PLC Configuration Storage | Smart Sensor Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping tables, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory-floor environments. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed via I²C during boot and runtime reconfiguration. Use Value: Enables field-upgradable control logic without firmware reflashing; retains settings through power loss and thermal cycling. | Use Scenario: Holding factory-trimmed offset/gain coefficients and temperature compensation curves for MEMS accelerometers and pressure sensors. IC Role / Device Role / Timing Role: Calibration data repository read once at startup to initialize analog front-end compensation algorithms. Use Value: Achieves ±0.1% measurement accuracy over −40°C to +85°C without requiring recalibration in end equipment. |
| Medical Device Settings Backup | Consumer Appliance User Preferences |
Use Scenario: Preserving therapy profiles, dosage limits, and audit logs in portable infusion pumps and diagnostic monitors. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory for regulatory-compliant data retention with WP pin disabling accidental overwrite. Use Value: Meets IEC 62304 Class B software safety requirements for persistent parameter storage. | Use Scenario: Saving user-selected modes (e.g., eco, turbo), timer presets, and display brightness in washing machines and HVAC remotes. IC Role / Device Role / Timing Role: Low-power, infrequently written memory accessed only during setup or mode change events. Use Value: Extends battery life in coin-cell-powered remotes via sub-µA standby current (1.6 µA typical at 2.7V). |
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 density and I²C interface, but SOIC-8 package and 1.7–5.5V supply range; no A0 pin - A1/A2 only. | Designed for surface-mount assembly; lacks PDIP option; wider voltage range supports 1.8V microcontrollers directly. | Select when board space is constrained and lead-free RoHS compliance is mandatory; not drop-in for through-hole layouts. |
| BR24G04NUX-10 | Rohm's 4K-bit I²C EEPROM in TSSOP-8; 1.6–5.5V operation; 1 MHz max clock; 4 ms write cycle; A0/A1/A2 addressing. | Higher speed and lower write time; includes built-in write protect register (software-controlled); different pinout (VCC/GND swapped vs PDIP). | Choose for faster configuration loads or where software-based WP flexibility outweighs hardware simplicity of AT24C04A-10PI-2.7. |
Compared with AT24C04D-SSHM-T and BR24G04NUX-10, the AT24C04A-10PI-2.7 offers proven through-hole manufacturability, strict 2.7–5.5V compatibility for legacy 3.3V/5V systems, and deterministic hardware write protection - making it optimal for industrial control and medical devices requiring long-term supply stability and mechanical robustness.
Availability
AT24C04A-10PI-2.7 is available at Aetrix Electronics and suitable for industrial PLC configuration storage, smart sensor calibration data retention, and medical device settings backup requiring stable component supply across multi-year production cycles.
Supply support for AT24C04A-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 is a global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with broad industrial and automotive qualification portfolios.
The AT24C04A-10PI-2.7 belongs to Microchip's legacy AT24C serial EEPROM family, designed for reliable, low-power nonvolatile data storage in cost-sensitive embedded systems where I²C bus simplicity and long-term data integrity are critical.
FAQ
What is the memory organization of the AT24C04A-10PI-2.7?
The AT24C04A-10PI-2.7 is internally organized as 512 words × 8 bits (4096 bits total), structured in 32 pages of 16 bytes each. It uses a 9-bit word address for random access, with A2 and A1 pins determining the device I²C address and A0 designated as no-connect. This layout supports efficient page writes and ensures compatibility with standard I²C EEPROM drivers.
Does the AT24C04A-10PI-2.7 support 1.8V operation?
No, the AT24C04A-10PI-2.7 is specifically rated for 2.7V to 5.5V operation, as indicated by the "-2.7" suffix in its part number. For 1.8V operation, Microchip offers variants such as AT24C04A-10PI-1.8. Using the AT24C04A-10PI-2.7 below 2.7V may result in unreliable I²C communication or failed write cycles.
How does the Write Protect (WP) pin function on the AT24C04A-10PI-2.7?
On the AT24C04A-10PI-2.7, the WP pin enables hardware-level write protection: when tied to VCC, it locks the upper 2K-bit array (addresses 0x200–0x3FF) to read-only access; when grounded, full read/write capability is restored. This feature operates independently of software commands and provides deterministic protection against accidental firmware corruption.
What package type is used for the AT24C04A-10PI-2.7?
The AT24C04A-10PI-2.7 uses an 8-pin Plastic Dual Inline Package (PDIP), 0.300" wide, with through-hole mounting and JEDEC MS-001 compliant footprint. The "PI" in the part number explicitly denotes this PDIP variant, distinguishing it from SOIC (SI), TSSOP (TI), MAP (Y1), or dBGA2 (U3) versions of the same device.
Can the AT24C04A-10PI-2.7 be used on the same I²C bus as AT24C02A devices?
Yes, the AT24C04A-10PI-2.7 can coexist with AT24C02A devices on the same I²C bus, provided their device addresses do not conflict. The AT24C04A uses A2/A1 for addressing (A0 = NC), supporting up to four devices, while the AT24C02A uses A2/A1/A0, supporting up to eight. Careful address pin assignment prevents bus contention during read/write operations.
AT24C04A-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
AT24C04A-10PI-2.7 FAQ
1.How can I place an order for AT24C04A-10PI-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C04A-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 AT24C04A-10PI-2.7 reliable?
The price and inventory of AT24C04A-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 AT24C04A-10PI-2.7 is usually 5 days.
3.What payment methods are accepted for AT24C04A-10PI-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C04A-10PI-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C04A-10PI-2.7?
AT24C04A-10PI-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C04A-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 AT24C04A-10PI-2.7?
For technical support, including AT24C04A-10PI-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C04A-10PI-2.7 requirements.
6.How does Aetrix verify that AT24C04A-10PI-2.7 is sourced from the original manufacturer or authorized distributors?
All AT24C04A-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 AT24C04A-10PI-2.7 meets industry standards.
7.What is the process for return or replacement of AT24C04A-10PI-2.7?
All AT24C04A-10PI-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C04A-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 AT24C04A-10PI-2.7 part is unused and in its original packaging.
Return procedure for AT24C04A-10PI-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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