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Microchip Technology AT24C02D-PUM
- Part No.:
- AT24C02D-PUM
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C02D-PUM.pdf
- Description:
- IC EEPROM 2KBIT I2C 1MHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,804
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Product details
Overview
AT24C02D-PUM from Microchip Technology is a 2-Kbit (256 × 8) I²C-compatible serial EEPROM in an 8-lead PDIP package, operating from 1.7V to 3.6V with industrial temperature range (−40°C to +85°C), 1 MHz Fast Mode Plus support, and hardware write protection via WP pin - used for nonvolatile parameter storage in microcontroller-based sensor nodes and power management subsystems.
For engineers reviewing the AT24C02D-PUM datasheet, AT24C02D-PUM pinout, AT24C02D-PUM application, or AT24C02D-PUM equivalent, key selection considerations include its 8-pin DIP footprint compatibility, 5 ms max self-timed write cycle, 1,000,000 write endurance, ultra-low standby current (0.8 μA), and Schmitt-triggered noise-immune I²C interface across voltage grades.
Technical Context
The AT24C02D-PUM functions as an I²C slave device with fixed 7-bit address prefix 1010b and three programmable hardware address bits (A0–A2), enabling up to eight devices on one bus. Its internal memory is organized as 32 pages of 8 bytes each, supporting byte and 8-byte page writes with acknowledge polling.
It implements a dedicated hardware write-protect circuit tied to the WP pin: logic high disables all writes to the full array, while logic low enables normal operation. All I/O pins (SDA, SCL, WP, A0–A2) feature Schmitt triggers and input filtering for robustness against bus noise in industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2,048 bits (256 × 8), directly usable for calibration data or firmware configuration storage |
| Supply voltage | 1.7V to 3.6V - supports direct interfacing with 1.8V/2.5V/3.3V microcontrollers without level shifters |
| Interface speed | Up to 1 MHz (Fast Mode Plus) at VCC ≥ 2.5V - enables faster parameter updates in time-critical systems |
| Write endurance | 1,000,000 cycles - suitable for logging applications with frequent small writes |
| Data retention | 100 years at 55°C - ensures long-term reliability in unattended embedded deployments |
| Standby current | 0.8 μA max at 3.6V - minimizes battery drain in always-on IoT edge nodes |
| Write cycle time | ≤5 ms self-timed - eliminates need for external timing control or busy-wait polling overhead |
Pinout & Package
AT24C02D-PUM is supplied in an 8-lead PDIP (Plastic Dual In-line Package) with 0.3-inch body width and through-hole mounting. Pin 1 is marked by a notch or dot; orientation follows standard IC top-view labeling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device address input | Hardware-selectable bit for multi-device I²C addressing; pulled down internally if floating |
| A1 | Device address input | Second hardware address bit; enables up to eight unique addresses when combined with A0/A2 |
| A2 | Device address input | Third hardware address bit; required for bus arbitration in stacked EEPROM configurations |
| GND | Ground reference | System return path for VCC and all I/O; must be low-impedance connection to avoid noise coupling |
| SDA | Serial data line | Open-drain bidirectional I²C data bus; requires external pull-up resistor (≤10 kΩ) |
| SCL | Serial clock line | Input-only I²C clock; rising edge latches input, falling edge clocks out data |
| WP | Write-protect control | Logic high disables all writes to entire memory array; prevents accidental overwrites during power transitions |
| VCC | Power supply | 1.7–3.6V core supply; must ramp monotonically at ≤0.1 V/µs for reliable POR behavior |
Key Features
| Feature | Design Value |
|---|---|
| Hardware write protection | WP pin provides immediate, latch-free disabling of all write operations - critical for safety-critical configuration locks |
| Schmitt-trigger inputs | SDA/SCL/A0–A2/WP inputs reject fast transients and bus noise, eliminating false start/stop detection in EMI-heavy environments |
| Page write mode | 8-byte burst writes reduce I²C transaction overhead by 87% vs. sequential byte writes - accelerates bulk parameter updates |
| Low-voltage operation | Full functionality down to 1.7V enables direct integration with energy-harvesting or coin-cell-powered systems |
| Green packaging | Pb-free, halide-free, RoHS-compliant PDIP meets global environmental compliance requirements without derating |
Applications
| Smart Meter Calibration Storage | Industrial PLC Configuration Backup |
|---|---|
Use Scenario: Storing meter-specific calibration coefficients and tariff tables that persist across power cycles and firmware updates. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed via I²C during boot and field recalibration events. Use Value: 100-year data retention and 1M write cycles ensure accuracy over 15+ year field life without maintenance. | Use Scenario: Retaining user-defined I/O mapping, PID tuning parameters, and alarm thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: System-level configuration store synchronized with controller reset and watchdog timeout events. Use Value: Hardware WP pin prevents corruption during brown-out conditions or hot-swap module insertion. |
| Medical Sensor Node Settings | Automotive Body Control Module (BCM) |
Use Scenario: Holding patient-specific sensor gain settings, offset corrections, and diagnostic history in portable ECG or pulse oximeter units. IC Role / Device Role / Timing Role: Low-power configuration manager accessed only during initialization or clinician reprogramming. Use Value: 0.8 μA standby current extends single-CR2032 battery life beyond 5 years in intermittent-use devices. | Use Scenario: Storing seat position memory, mirror angle presets, and lighting profiles in automotive interior modules. IC Role / Device Role / Timing Role: Persistent settings repository updated during vehicle ignition-off sequence and read at next power-on. Use Value: −40°C to +85°C operation guarantees reliable function across extreme ambient conditions in parked vehicles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C02C-PUM | Same 2-Kbit capacity and PDIP-8 package, but rated for commercial temp range (0°C to +70°C) only | Not qualified for industrial or automotive under-hood use where extended temperature stability is required | Select only for cost-sensitive consumer electronics with controlled ambient environments |
| M24C02-RMN6TP | 2-Kbit I²C EEPROM in 8-lead SOIC; supports 1 MHz FM+ but lacks internal pull-down on address pins | Requires external pull-down resistors on A0–A2 for deterministic addressing; no WP pin - software-only protection | Choose when board space constraints favor SOIC and system-level write control suffices |
Compared with AT24C02C-PUM, the AT24C02D-PUM adds guaranteed industrial temperature operation and stronger internal address pin biasing; versus M24C02-RMN6TP, it provides hardware write protection and simplified multi-device addressing without external components.
Availability
AT24C02D-PUM is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, medical sensor nodes, and automotive body control modules requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AT24C02D-PUM 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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and memory solutions for industrial, automotive, and communications markets.
The AT24C02D-PUM belongs to Microchip's AT24CxxD serial EEPROM family, designed specifically for low-voltage, noise-immune, long-life nonvolatile storage in resource-constrained embedded systems.
FAQ
What is the maximum I²C clock frequency supported by the AT24C02D-PUM?
The AT24C02D-PUM supports 100 kHz Standard Mode, 400 kHz Fast Mode, and 1 MHz Fast Mode Plus - but FM+ operation requires VCC ≥ 2.5V. At 1.7–2.4V, only Standard and Fast Modes are guaranteed. This allows designers to scale bus speed based on supply rail and noise environment without changing the AT24C02D-PUM part number.
Does the AT24C02D-PUM require external pull-up resistors on SDA and SCL lines?
Yes, the AT24C02D-PUM requires external pull-up resistors on both SDA and SCL lines because its SDA pin is open-drain and SCL is input-only. Microchip specifies maximum values of 10 kΩ for 100 kHz, 4 kΩ for 400 kHz, and 1.3 kΩ for 1 MHz operation - these values ensure proper rise times per I²C specification and prevent signal integrity issues in multi-drop buses.
How does the write-protect (WP) pin function on the AT24C02D-PUM?
When the WP pin of the AT24C02D-PUM is driven high (to VCC), all write operations - including byte, page, and erase - are inhibited across the full 2-Kbit memory array. When WP is low (GND) or floating (internally pulled down), normal write access is enabled. This hardware-level lock prevents corruption during power instability or firmware faults, independent of software state.
Can the AT24C02D-PUM operate reliably at 1.7V supply voltage?
Yes, the AT24C02D-PUM is fully specified for operation at 1.7V - including 100 kHz and 400 kHz I²C modes, 5 ms write cycle, and 0.8 μA standby current. Its design uses optimized process and circuit techniques to maintain timing margins and noise immunity even at minimum VCC, making it suitable for battery-powered or energy-harvesting systems where voltage sag is common.
What is the memory organization of the AT24C02D-PUM and how does it affect write efficiency?
The AT24C02D-PUM organizes its 2,048 bits as 32 pages of 8 bytes each. This enables 8-byte page writes, reducing I²C transaction count by up to 8× compared to byte writes - for example, storing a 24-byte sensor calibration table requires only three page writes instead of 24 separate byte writes, significantly lowering bus occupancy and host CPU overhead.
AT24C02D-PUM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 256 x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 4.5 µs
- Voltage - Supply:
- 1.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C02D-PUM FAQ
1.How can I place an order for AT24C02D-PUM through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C02D-PUM 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 AT24C02D-PUM reliable?
The price and inventory of AT24C02D-PUM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C02D-PUM is usually 5 days.
3.What payment methods are accepted for AT24C02D-PUM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C02D-PUM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C02D-PUM?
AT24C02D-PUM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C02D-PUM 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 AT24C02D-PUM?
For technical support, including AT24C02D-PUM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C02D-PUM requirements.
6.How does Aetrix verify that AT24C02D-PUM is sourced from the original manufacturer or authorized distributors?
All AT24C02D-PUM 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 AT24C02D-PUM meets industry standards.
7.What is the process for return or replacement of AT24C02D-PUM?
All AT24C02D-PUM units undergo pre-shipment inspection (PSI). If there is an issue with AT24C02D-PUM, 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 AT24C02D-PUM part is unused and in its original packaging.
Return procedure for AT24C02D-PUM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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