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Microchip Technology AT24C04A-10PI-1.8
- Part No.:
- AT24C04A-10PI-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C04A-10PI-1.8.pdf
- Description:
- IC EEPROM 4KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,387
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Product details
Overview
AT24C04A-10PI-1.8 from Microchip Technology (formerly Atmel) is a 4-kbit I²C-compatible serial EEPROM organized as 512 words × 8 bits, operating from 1.8V to 5.5V, featuring hardware write protection via the WP pin and 16-byte page write capability. It targets low-voltage embedded systems requiring nonvolatile data storage with automotive-grade reliability.
For engineers reviewing the AT24C04A-10PI-1.8 datasheet, AT24C04A-10PI-1.8 pinout, AT24C04A-10PI-1.8 application, or AT24C04A-10PI-1.8 equivalent, key selection considerations include its 1.8V minimum supply, 4K-bit memory density, 8-pin PDIP package, and I²C interface timing compliance at 100 kHz under 1.8V operation.
Technical Context
The AT24C04A-10PI-1.8 implements a two-wire I²C interface with Schmitt-triggered, noise-filtered SDA and SCL inputs, supporting standard-mode (100 kHz) operation at 1.8V and fast-mode (400 kHz) at ≥2.5V. Its internal address decoder uses A2 and A1 for device addressing (A0 is NC), enabling up to four 4K devices on one bus.
Write protection is enforced by the WP pin: tied to VCC, it locks the upper 2K-bit half of memory; tied to GND, full read/write access is enabled. The device performs self-timed writes with ≤5 ms duration and supports byte, page (16-byte), and sequential read modes with acknowledge polling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4096 bits (512 × 8), organized in 32 pages of 16 bytes each - enables efficient firmware parameter storage with page-level write optimization. |
| Supply Voltage Range | 1.8V to 5.5V - supports direct interfacing with 1.8V logic and mixed-voltage systems without level shifters. |
| I²C Clock Frequency | 100 kHz max at 1.8V; 400 kHz max at 2.5V/2.7V/5V - ensures reliable communication in ultra-low-power sensor nodes and battery-powered devices. |
| Write Cycle Time | ≤5 ms - defines minimum interval between successive write commands; critical for real-time logging applications. |
| Endurance & Retention | 1 million write cycles; 100 years data retention - meets long-life requirements in industrial control and automotive subsystems. |
| Operating Temperature | −40°C to +85°C - qualified for extended-temperature industrial and automotive environments. |
| Package | 8-lead PDIP (8P3), 0.300" wide - compatible with through-hole prototyping, legacy PCBs, and manual assembly workflows. |
Pinout & Package
AT24C04A-10PI-1.8 is housed in an 8-lead Plastic Dual Inline Package (PDIP), 0.300" wide body per JEDEC MS-001 BA. Pin 1 is located at the top-left corner when viewed from top with notch or dot orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | No-connect (NC) | Not internally connected; must be left floating or tied to any voltage - simplifies board layout for 4K variant versus 2K family members. |
| A1, A2 | Device Address Inputs | Hardwired to define 2-bit chip address; allows up to four AT24C04A devices on same I²C bus without address conflict. |
| GND | Ground Reference | Return path for all internal circuitry and I/O; requires low-impedance connection to system ground plane. |
| VCC | Power Supply | Accepts 1.8–5.5V; powers EEPROM core and I/O buffers - enables single-supply operation across multiple logic families. |
| WP | Write Protect Control | Active-high hardware lock: VCC disables writes to upper 2K-bit memory segment; GND enables full read/write access. |
| SCL | Serial Clock Input | Positive-edge sampled clock for I²C protocol; open-drain compatible with external pull-up; filtered for EMI resilience. |
| SDA | Serial Data Bidirectional | Open-drain I/O shared across I²C bus; supports multi-master arbitration and wire-OR logic with other devices. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Write Protection | WP pin enables selective locking of upper 2K-bit memory region - prevents accidental overwrites during firmware updates or power glitches. |
| Low-Voltage Operation | Guaranteed functionality down to 1.8V VCC - eliminates need for voltage translators in modern ultra-low-power microcontroller designs. |
| Page Write Capability | 16-byte burst writes reduce I²C transaction overhead by 87% vs. individual byte writes - accelerates configuration data storage. |
| Noise-Suppressed Inputs | Schmitt-trigger + filtering on SDA/SCL - ensures robust communication in electrically noisy industrial enclosures or automotive harnesses. |
| Automotive-Grade Qualification | Rated for −40°C to +85°C with lead-free/halogen-free packaging - satisfies AEC-Q100 stress test requirements for non-safety-critical ECUs. |
Applications
| Industrial Sensor Node | Medical Diagnostic Device |
|---|---|
Use Scenario: Storing calibrated sensor offsets, fault logs, and usage counters in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Nonvolatile configuration and event logging memory interfaced directly to an ARM Cortex-M0+ MCU via I²C. Use Value: 1.8V operation extends battery life; 1M endurance supports daily calibration cycles over 10+ years. | Use Scenario: Retaining patient history, calibration certificates, and audit trails in portable ultrasound or glucose meters. IC Role / Device Role / Timing Role: Secure, tamper-resistant data storage with WP-enabled write-locking of regulatory records. Use Value: Hardware write protection prevents unauthorized modification of FDA-mandated traceability data. |
| Automotive Body Control Module | Smart Home Gateway |
Use Scenario: Saving seat/mirror position presets, lighting profiles, and door lock configurations in 12V vehicle subsystems. IC Role / Device Role / Timing Role: I²C EEPROM co-located with LIN-to-I²C bridge IC for local parameter persistence. Use Value: −40°C to +85°C rating ensures reliability across engine bay and cabin temperature extremes. | Use Scenario: Storing Wi-Fi credentials, OTA update metadata, and user preferences in always-on home automation hubs. IC Role / Device Role / Timing Role: Primary configuration store accessed during boot by Linux-based SoC via I²C bus. Use Value: 16-byte page writes minimize boot time latency when loading network stack parameters. |
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 1.8V–5.5V range; SOIC-8 package; no PDIP option; RoHS-compliant dBGA2 footprint not supported. | Targeted at surface-mount production; lacks through-hole PDIP variant for prototyping or repair. | Select when automated SMT assembly is required and PDIP is unnecessary. |
| M24C04-RMN6TP | 4K-bit I²C EEPROM; 1.8V–5.5V; TSSOP-8 package; 100 kHz @ 1.8V; WP pin present; endurance rated at 400k cycles (vs. 1M). | Lower write endurance; different pinout (SCL/SDA swapped); not drop-in replaceable without layout change. | Choose only after verifying pin compatibility and endurance margin sufficiency for target use case. |
Compared with AT24C04D-SSHM-T and M24C04-RMN6TP, the AT24C04A-10PI-1.8 uniquely combines PDIP packaging, 1-million-cycle endurance, and guaranteed 100 kHz I²C operation at 1.8V - making it optimal for low-volume industrial design, field service replacement, and legacy system upgrades.
Availability
AT24C04A-10PI-1.8 is available at Aetrix Electronics and suitable for industrial sensor nodes, medical diagnostic devices, automotive body control modules, smart home gateways, and battery-powered IoT edge devices requiring stable component supply across long product lifecycles.
Supply support for AT24C04A-10PI-1.8 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 delivering microcontrollers, analog components, FPGAs, and memory solutions with emphasis on reliability, security, and longevity.
The AT24C04A belongs to Microchip's serial EEPROM product line, designed specifically for cost-sensitive, low-power embedded systems needing robust nonvolatile storage in space-constrained or thermally demanding environments.
FAQ
What is the maximum I²C clock frequency supported by AT24C04A-10PI-1.8 at 1.8V?
The AT24C04A-10PI-1.8 supports a maximum I²C clock frequency of 100 kHz when operated at 1.8V. This is explicitly specified in Table 5 of the datasheet under "1.8-volt" AC characteristics. At higher supply voltages (≥2.5V), the device supports up to 400 kHz. The 100 kHz limit at 1.8V ensures signal integrity and timing margin for low-voltage operation in AT24C04A-10PI-1.8 applications.
Does AT24C04A-10PI-1.8 require external pull-up resistors on SDA and SCL lines?
Yes, AT24C04A-10PI-1.8 requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. The datasheet specifies that SDA is bidirectional and open-drain driven, and SCL is an input with open-drain compatibility. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and speed; AT24C04A-10PI-1.8's Schmitt-trigger inputs help maintain noise immunity even with higher resistance values.
How is memory addressing implemented in AT24C04A-10PI-1.8?
AT24C04A-10PI-1.8 uses a 9-bit internal word address for random access, with the upper 7 bits transmitted as part of the device address byte (A2, A1, and memory-page bit P0) and the lower 2 bits derived from the data word address. A2 and A1 are hardwired device address pins; A0 is NC. This allows up to four AT24C04A-10PI-1.8 devices on one I²C bus. The full 4K-bit array is accessed using this scheme, confirmed in the Device Addressing section of the datasheet.
What happens when the WP pin is connected to VCC on AT24C04A-10PI-1.8?
When the WP pin of AT24C04A-10PI-1.8 is connected to VCC, hardware write protection is activated and the upper half (2K-bit) of the memory array becomes read-only. Writes to addresses 0x200–0x3FF are blocked, while addresses 0x000–0x1FF remain writable. This behavior is defined in Table 2 ("Write Protect") and applies specifically to the AT24C04A-10PI-1.8 variant - distinct from the AT24C02A's 1K upper-half lock.
Is AT24C04A-10PI-1.8 compatible with standard I²C protocol implementations?
Yes, AT24C04A-10PI-1.8 fully complies with the standard I²C protocol, supporting START/STOP conditions, ACK/NACK handshaking, 7-bit device addressing, and byte/page write/read sequences. Its bidirectional SDA line, clocked SCL input, and acknowledge polling mechanism align with I²C specification v2.1. All timing parameters (tBUF, tHD.STA, tSU.STA, etc.) in Table 5 are validated against I²C bus requirements - confirming interoperability with standard I²C masters including STM32, PIC, and ESP32 microcontrollers.
AT24C04A-10PI-1.8 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:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C04A-10PI-1.8 FAQ
1.How can I place an order for AT24C04A-10PI-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C04A-10PI-1.8 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-1.8 reliable?
The price and inventory of AT24C04A-10PI-1.8 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-1.8 is usually 5 days.
3.What payment methods are accepted for AT24C04A-10PI-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C04A-10PI-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C04A-10PI-1.8?
AT24C04A-10PI-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C04A-10PI-1.8 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-1.8?
For technical support, including AT24C04A-10PI-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C04A-10PI-1.8 requirements.
6.How does Aetrix verify that AT24C04A-10PI-1.8 is sourced from the original manufacturer or authorized distributors?
All AT24C04A-10PI-1.8 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-1.8 meets industry standards.
7.What is the process for return or replacement of AT24C04A-10PI-1.8?
All AT24C04A-10PI-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C04A-10PI-1.8, 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-1.8 part is unused and in its original packaging.
Return procedure for AT24C04A-10PI-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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