My Inquiry
My Account
Microchip Technology AT24C04A-10PC-1.8
- Part No.:
- AT24C04A-10PC-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C04A-10PC-1.8.pdf
- Description:
- IC EEPROM 4KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,179
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT24C04A-10PC-1.8 from Microchip Technology (formerly Atmel) is a 4K-bit (512 × 8) I²C-compatible serial EEPROM optimized for ultra-low-voltage embedded systems. It operates from 1.8V to 5.5V, supports 100 kHz I²C communication at 1.8V, features hardware write protection via the WP pin, and delivers 1 million write cycles with 100-year data retention - used in battery-powered sensor nodes and portable medical devices.
For engineers reviewing the AT24C04A-10PC-1.8 datasheet, AT24C04A-10PC-1.8 pinout, AT24C04A-10PC-1.8 application, or AT24C04A-10PC-1.8 equivalent, key selection criteria include its 1.8V minimum supply, 16-byte page write capability, Schmitt-triggered noise-immune inputs, JEDEC SOIC-8 package, and compatibility with I²C-bus timing requirements for low-power microcontroller interfaces.
Technical Context
The AT24C04A-10PC-1.8 implements a standard two-wire I²C interface with open-drain SDA/SCL pins, internal address decoding using A2/A1 (A0 is NC), and hardware-based write protection controlled by the WP pin. Its memory is organized as 256 pages of 2 bytes each, requiring a 9-bit word address for random access.
It uses an internally timed 10 ms write cycle with acknowledge polling support, supports partial page writes up to 16 bytes, and incorporates Schmitt-trigger inputs with 100 ns noise suppression - enabling robust operation in electrically noisy industrial control and automotive body electronics environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4096 bits (512 × 8), organized as 256 pages × 2 bytes - enables compact firmware parameter storage without external address latches. |
| Supply Voltage Range | 1.8V to 5.5V - supports direct interfacing with 1.8V logic families and mixed-voltage systems without level shifters. |
| I²C Clock Frequency | 100 kHz max at 1.8V - ensures reliable timing margin in low-power sleep-mode wake-up sequences. |
| Write Cycle Time | 10 ms maximum - defines minimum interval between successive write commands; requires polling or timeout handling in firmware. |
| Endurance & Retention | 1 million write cycles / 100 years data retention - suitable for logging applications with frequent updates (e.g., energy meter tamper records). |
| ESD Protection | >3000V HBM - provides built-in robustness against handling-induced static discharge during PCB assembly. |
| Operating Temperature | 0°C to +70°C (Commercial grade) - validated for use in consumer electronics and non-automotive industrial enclosures. |
Pinout & Package
AT24C04A-10PC-1.8 is housed in an 8-pin PDIP (Plastic Dual Inline Package), 0.300" wide, with through-hole mounting. Pin 1 is marked by a notch or dot; pin numbering follows standard JEDEC DIP convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | No Connect (NC) | Internally unused; must be left unconnected - distinguishes AT24C04A from AT24C02A which uses all three address pins. |
| A1 | Device Address Input | Hardwired to set one of four possible I²C slave addresses (with A2); enables multi-device bus configuration. |
| A2 | Device Address Input | Used with A1 to select device address; A0 is NC - limits bus capacity to four AT24C04A devices per I²C segment. |
| GND | Ground Reference | Return path for VCC and signal currents; must be connected to system ground plane with low impedance. |
| VCC | Power Supply | 1.8V–5.5V input; decoupling capacitor (0.1 µF ceramic) required within 1 cm of pin for stable low-voltage operation. |
| WP | Write Protect Control | Active-high hardware lock: tied to VCC disables all writes; tied to GND enables full read/write access. |
| SCL | I²C Clock Input | Open-drain input with Schmitt trigger; requires external pull-up resistor (typically 4.7 kΩ) to VCC. |
| SDA | I²C Data I/O | Bidirectional open-drain line; shares pull-up with SCL; supports multi-master arbitration and clock stretching. |
Key Features
| Feature | Design Value |
|---|---|
| 1.8V Operation Support | Guaranteed functionality down to 1.8V VCC - eliminates need for voltage translators when interfacing with modern ultra-low-power MCUs like ARM Cortex-M0+. |
| 16-Byte Page Write Mode | Enables burst programming of up to 16 bytes per write cycle - reduces firmware overhead and total write time versus byte-by-byte writes. |
| Schmitt-Trigger Inputs | Provides hysteresis on SCL/SDA to reject noise spikes up to 100 ns - critical for reliable I²C communication in motor drive or switching power supply environments. |
| Hardware Write Protection | WP pin allows field-programmable lockout of memory writes - prevents accidental corruption during firmware updates or brown-out conditions. |
| 100-Year Data Retention | Validated at 25°C - ensures calibration data, security keys, or configuration settings remain intact over product lifetime without refresh. |
Applications
| Smart Energy Meters | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Storing tariff tables, metering calibration constants, and tamper-event logs in utility-grade electricity meters. IC Role / Device Role / Timing Role: Nonvolatile configuration and event storage element interfaced to an 8-bit MCU via I²C at 1.8V. Use Value: Enables secure, long-term retention of regulatory-critical data with hardware write lock to prevent unauthorized modification. |
Use Scenario: Holding module identification, channel scaling factors, and fault history in DIN-rail mounted programmable logic controller I/O expanders. IC Role / Device Role / Timing Role: Parameter memory co-located with isolated analog input circuitry, accessed during cold start and runtime reconfiguration. Use Value: Supports field-upgradable calibration without firmware changes and survives repeated power cycling in factory automation environments. |
| Portable Medical Sensors | Consumer IoT Edge Nodes |
Use Scenario: Recording patient-specific thresholds, sensor offset corrections, and usage counters in handheld pulse oximeters and glucose monitors. IC Role / Device Role / Timing Role: Low-power persistent memory for safety-critical configuration data, operating from coin-cell or Li-ion backup supply. Use Value: Meets IEC 62304 Class B software requirements for data integrity and guarantees 100-year retention of life-support parameters. |
Use Scenario: Storing Wi-Fi credentials, firmware version stamps, and user preferences in battery-operated smart home sensors (e.g., temperature/humidity nodes). IC Role / Device Role / Timing Role: I²C-configurable memory mapped into MCU's peripheral address space for fast boot-time initialization. Use Value: Reduces BOM count by eliminating external SPI flash; 1.8V compatibility extends battery life in sub-2V deep-sleep modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Microchip AT24C04D-SSHM-T | Same 4K-bit capacity and 1.8V operation, but in 8-pin SOIC package with enhanced ESD rating (4kV HBM) and extended temp range (–40°C to +85°C). | Designed for industrial temperature operation; lacks PDIP packaging option. | Select when wider temperature range or higher ESD immunity is required; not drop-in for through-hole designs. |
| ON Semiconductor CAT24C04HU4I-GT3 | 4K-bit I²C EEPROM with identical 1.8V–5.5V range and 100 kHz speed, but uses TSSOP-8 package and offers faster 5 ms write cycle. | Surface-mount only; optimized for high-density PCB layouts where footprint and thermal profile matter. | Choose for automated SMT assembly and space-constrained designs; verify WP pin behavior matches legacy firmware. |
Compared with AT24C04A-10PC-1.8, AT24C04D-SSHM-T adds industrial temperature support and higher ESD tolerance in SOIC, while CAT24C04HU4I-GT3 offers faster writes and smaller TSSOP packaging - both require layout or firmware validation for WP pin logic and I²C timing margins.
Availability
AT24C04A-10PC-1.8 is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, portable medical sensors, and consumer IoT edge nodes requiring stable component supply across long production lifecycles.
Supply support for AT24C04A-10PC-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 acquired Atmel in 2016 and maintains full support for the AT24CxxA EEPROM family. The company specializes in microcontrollers, analog, and memory solutions for embedded control applications.
The AT24C04A belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-power systems needing reliable nonvolatile storage with minimal pin count and board space.
FAQ
What is the maximum I²C clock frequency supported by AT24C04A-10PC-1.8?
The AT24C04A-10PC-1.8 supports up to 100 kHz I²C clock frequency when operated at 1.8V. This is specified in the AC Characteristics table under fSCL for 1.8V operation. At 5.0V, it supports up to 400 kHz, but the -1.8 suffix indicates this variant is characterized and guaranteed for 100 kHz at minimum 1.8V supply - critical for low-power MCU peripherals with reduced clock drive strength.
Does AT24C04A-10PC-1.8 support partial page writes?
Yes, AT24C04A-10PC-1.8 supports partial page writes within its 16-byte page boundary. After initiating a page write, the internal address counter increments automatically; writing fewer than 16 bytes does not corrupt subsequent locations. This feature reduces firmware complexity when updating non-aligned configuration fields without reading-modify-write cycles.
What is the function of the A0 pin on AT24C04A-10PC-1.8?
On AT24C04A-10PC-1.8, the A0 pin is a no-connect (NC) terminal. Unlike the AT24C02A, which uses A2–A0 for device addressing, the AT24C04A only uses A2 and A1 - allowing up to four devices on the same I²C bus. A0 must remain unconnected; tying it to VCC or GND may cause unpredictable addressing behavior or bus contention.
How does the Write Protect (WP) pin operate on AT24C04A-10PC-1.8?
On AT24C04A-10PC-1.8, the WP pin enables hardware write protection: when pulled high to VCC, it locks the entire 4K memory array against writes; when grounded, full read/write access is enabled. This behavior is independent of I²C commands and provides fail-safe protection during power transitions or firmware errors - a key requirement in safety-certified systems.
Is AT24C04A-10PC-1.8 RoHS compliant and lead-free?
Yes, AT24C04A-10PC-1.8 is RoHS compliant and lead-free. As a legacy Atmel part manufactured prior to 2010 and continued by Microchip, it meets EU RoHS Directive 2011/65/EU requirements. The "PC" in the part number denotes plastic DIP packaging, and Microchip's official product change notices confirm Pb-free finish and halogen-free molding compound for this variant.
AT24C04A-10PC-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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C04A-10PC-1.8 FAQ
1.How can I place an order for AT24C04A-10PC-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C04A-10PC-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-10PC-1.8 reliable?
The price and inventory of AT24C04A-10PC-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-10PC-1.8 is usually 5 days.
3.What payment methods are accepted for AT24C04A-10PC-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C04A-10PC-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C04A-10PC-1.8?
AT24C04A-10PC-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C04A-10PC-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-10PC-1.8?
For technical support, including AT24C04A-10PC-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C04A-10PC-1.8 requirements.
6.How does Aetrix verify that AT24C04A-10PC-1.8 is sourced from the original manufacturer or authorized distributors?
All AT24C04A-10PC-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-10PC-1.8 meets industry standards.
7.What is the process for return or replacement of AT24C04A-10PC-1.8?
All AT24C04A-10PC-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C04A-10PC-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-10PC-1.8 part is unused and in its original packaging.
Return procedure for AT24C04A-10PC-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24C04A-10PC-1.8 Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
