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Microchip Technology AT24C02C-MAHM-E
- Part No.:
- AT24C02C-MAHM-E
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
AT24C02C-MAHM-E.pdf
- Description:
- IC EEPROM 2KBIT I2C 1MHZ 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:27,777
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Product details
Overview
AT24C02C-MAHM-E from Microchip Technology is a 2-Kbit I²C-compatible serial EEPROM organized as 256 × 8 bits, operating from 1.7V to 5.5V with industrial temperature range (−40°C to +85°C), supporting 1 MHz Fast Mode Plus, and featuring hardware write-protection via the WP pin for use in embedded system configuration storage.
For engineers reviewing the AT24C02C-MAHM-E datasheet, AT24C02C-MAHM-E pinout, AT24C02C-MAHM-E application, or AT24C02C-MAHM-E equivalent, key selection criteria include I²C bus voltage compatibility (1.7–5.5V), page-write timing (≤5 ms), standby current (≤6 μA at 5.5V), and 8-pin UDFN package footprint constraints.
Technical Context
The AT24C02C-MAHM-E implements a two-wire I²C slave interface with Schmitt-triggered, noise-filtered SDA/SCL inputs, supporting Standard (100 kHz), Fast (400 kHz), and Fast Mode Plus (1 MHz) speeds depending on VCC level. It uses an internal high-voltage generation circuit for EEPROM cell programming and includes a Power-on Reset (POR) circuit with 100 µs tPUP delay.
Memory is organized into 32 pages of 8 bytes each, enabling partial-page writes and sequential reads. Device addressing uses three hardware pins (A0–A2) to support up to eight devices on one bus; the AT24C02C-MAHM-E's UDFN package exposes all three address pins for configurable slave addressing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2,048 bits (256 × 8), sufficient for firmware parameter storage or calibration data in space-constrained systems |
| Supply voltage | 1.7V to 5.5V - enables direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level shifters |
| Write endurance | 1,000,000 cycles - supports frequent field-updatable configuration logging in industrial controllers |
| Data retention | 100 years at 55°C - ensures long-term reliability in unattended equipment like smart meters |
| Standby current | 6 µA maximum at 5.5V - critical for battery-backed real-time clock (RTC) backup memory applications |
| I²C speed | 1 MHz Fast Mode Plus at 2.5–5.5V - reduces firmware boot-time EEPROM read latency in high-throughput systems |
| Write cycle time | ≤5 ms max self-timed - allows deterministic timeout handling in interrupt-driven firmware without polling overhead |
Pinout & Package
The AT24C02C-MAHM-E is supplied in an 8-pad UDFN (Ultra Thin DFN) package, 2.0 mm × 1.6 mm × 0.55 mm, RoHS-compliant and halide-free, with exposed pad recommended to be connected to GND for thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Hardware device address input | Configures LSB of 7-bit slave address; tied low/high to select among eight possible I²C addresses on shared bus |
| A1 | Hardware device address input | Configures middle bit of slave address; enables multi-device topology without software address conflict |
| A2 | Hardware device address input | Configures MSB of slave address; required for cascading multiple AT24C02C-MAHM-E devices on single I²C bus |
| GND | Ground reference | Return path for VCC and signal currents; must be low-impedance connection to minimize noise coupling into SDA/SCL |
| SDA | Serial data bidirectional I/O | Open-drain line requiring external pull-up; carries command, address, and data; shares bus with other I²C slaves |
| SCL | Serial clock input | Master-generated clock; rising edge latches input, falling edge outputs data; must be pulled high externally |
| WP | Hardware write-protect control | Active-high protection: tied to VCC disables all writes, preventing accidental overwrites during power transients |
| VCC | Power supply input | Supplies core logic and EEPROM programming voltage; must ramp monotonically at ≤0.1 V/µs for reliable POR |
Key Features
| Feature | Design Value |
|---|---|
| Fast Mode Plus (1 MHz) | Enables sub-100 µs random reads at 2.5–5.5V, reducing boot-time configuration load latency in real-time systems |
| 8-byte page write mode | Allows partial writes within 8-byte boundaries, minimizing bus occupancy and enabling efficient small-data updates |
| Schmitt-triggered inputs | Rejects >100 ns noise spikes on SDA/SCL, eliminating false start/stop detection in electrically noisy industrial environments |
| Internal pull-down on A0/A1/A2/WP | Ensures defined logic state when pins float, simplifying PCB layout by reducing mandatory external resistors in cost-sensitive designs |
| ESD protection >4 kV | Meets IEC 61000-4-2 Level 3 requirements, enabling direct integration into handheld or field-deployable equipment |
Applications
| Industrial Sensor Calibration Storage | Smart Energy Meter Parameter Retention |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients and temperature compensation tables for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent sensor characterization data accessed at system power-up. Use Value: Eliminates need for external calibration EEPROM programming step during manufacturing; supports field recalibration with verified 1M-cycle endurance. | Use Scenario: Retaining tariff schedules, billing counters, and communication module credentials across mains power loss in DIN-rail mounted electricity meters. IC Role / Device Role / Timing Role: Battery-backed parameter vault ensuring data integrity during brownouts and grid instability events. Use Value: 6 µA standby current extends CR2032 backup battery life beyond 10 years; 100-year data retention meets utility-grade meter certification requirements. |
| IoT Edge Device Firmware Settings | Automotive Body Control Module NVM |
Use Scenario: Holding user-configurable network parameters (Wi-Fi SSID/password, MQTT broker IP), OTA update flags, and device-specific identifiers in battery-powered gateways. IC Role / Device Role / Timing Role: Secure, low-power configuration store accessible via standard I²C without dedicated MCU peripherals. Use Value: 1.7V operation enables direct interface with Li-ion battery (2.8–4.2V) powered systems; WP pin prevents remote firmware corruption via malicious I²C traffic. | Use Scenario: Storing seat position memory, mirror angle presets, and lighting profiles in automotive door modules where space and thermal dissipation are constrained. IC Role / Device Role / Timing Role: Automotive-grade nonvolatile memory meeting AEC-Q100 stress test requirements for passenger cabin electronics. Use Value: −40°C to +85°C operation ensures reliability in under-hood and door cavity environments; 8-pad UDFN footprint minimizes PCB area vs. SOIC alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics M24C02-RMN6TP | Same 2-Kbit capacity, 1.7–5.5V, but rated only to 400 kHz Fast Mode (no FM+); WP pin active-low instead of active-high | Lacks 1 MHz speed for high-throughput boot loading; requires inverted WP logic in existing schematics | Choose when FM+ is unnecessary and active-low WP aligns with legacy board design |
| ON Semiconductor CAT24C02HU4IGT3 | Identical 2-Kbit, 1.7–5.5V, 1 MHz FM+, but uses 8-ball VFBGA (1.6 × 1.6 mm) instead of UDFN; same pinout mapping | VFBGA offers better thermal performance in high-density layouts but requires rework-capable assembly process | Choose for thermally demanding applications where UDFN thermal resistance is insufficient |
Compared with M24C02-RMN6TP, AT24C02C-MAHM-E delivers faster configuration reads and simpler WP integration; versus CAT24C02HU4IGT3, it trades slightly higher thermal resistance for broader solder-reflow process tolerance in mid-volume production.
Availability
AT24C02C-MAHM-E is available at Aetrix Electronics and suitable for industrial sensor calibration storage, smart energy meter parameter retention, and IoT edge device firmware settings requiring stable component supply across extended product lifecycles.
Supply support for AT24C02C-MAHM-E 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 ISO 9001-certified manufacturing and broad automotive/industrial qualification coverage.
The AT24C02C-MAHM-E belongs to Microchip's AT24Cxx family of I²C EEPROMs, designed specifically for low-voltage, low-power, and high-reliability nonvolatile data storage in space-constrained embedded systems.
FAQ
What is the maximum I²C clock frequency supported by the AT24C02C-MAHM-E?
The AT24C02C-MAHM-E supports 100 kHz Standard Mode, 400 kHz Fast Mode, and 1 MHz Fast Mode Plus - but only when VCC is ≥2.5V. At 1.7–2.5V, maximum speed is limited to 400 kHz. This voltage-dependent speed scaling ensures timing compliance across its full 1.7–5.5V operating range, and the AT24C02C-MAHM-E datasheet specifies tLOW/tHIGH minima accordingly for each mode.
Does the AT24C02C-MAHM-E require external pull-up resistors on SDA and SCL lines?
Yes, the AT24C02C-MAHM-E requires external pull-up resistors on both SDA and SCL because its I/O pins are open-drain. The recommended maximum value is 10 kΩ; typical values are 4.7 kΩ for 400 kHz and 1.3 kΩ for 1 MHz operation. The AT24C02C-MAHM-E's internal Schmitt triggers and noise filters work in conjunction with these external resistors to ensure robust bus communication in noisy environments.
How does the Write-Protect (WP) pin function on the AT24C02C-MAHM-E?
When the WP pin of the AT24C02C-MAHM-E is driven high (to VCC), all write operations - including byte, page, and erase - are inhibited across the entire memory array. When WP is low (GND) or floating, writes are enabled. Internally, WP is pulled down, so floating defaults to write-enabled - but Microchip recommends hard-wiring WP to avoid noise-induced glitches, and the AT24C02C-MAHM-E's datasheet specifies 10 kΩ as the max recommended pull-up resistor value.
What package type is used for the AT24C02C-MAHM-E, and what are its key mechanical dimensions?
The AT24C02C-MAHM-E uses an 8-pad UDFN (Ultra Thin Dual Flat No-lead) package measuring 2.0 mm × 1.6 mm × 0.55 mm with an exposed thermal pad. Pin pitch is 0.5 mm, and the package is RoHS-compliant, halide-free, and green. The AT24C02C-MAHM-E's UDFN footprint saves ~60% board area compared to standard 8-lead SOIC, making it ideal for wearables and compact industrial modules.
Can the AT24C02C-MAHM-E be used in automotive applications?
The AT24C02C-MAHM-E is qualified for industrial temperature range (−40°C to +85°C) and meets AEC-Q200 stress testing for passive components, but it is not officially AEC-Q100 qualified as an integrated circuit. For non-safety-critical automotive body electronics (e.g., seat memory, ambient lighting presets), the AT24C02C-MAHM-E is widely deployed - however, safety-critical domains require AEC-Q100-certified alternatives. Always verify system-level qualification requirements before finalizing the AT24C02C-MAHM-E in automotive designs.
AT24C02C-MAHM-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-UFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- 550 ns
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UDFN (2x3)
AT24C02C-MAHM-E FAQ
1.How can I place an order for AT24C02C-MAHM-E through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C02C-MAHM-E 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 AT24C02C-MAHM-E reliable?
The price and inventory of AT24C02C-MAHM-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C02C-MAHM-E is usually 5 days.
3.What payment methods are accepted for AT24C02C-MAHM-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C02C-MAHM-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C02C-MAHM-E?
AT24C02C-MAHM-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C02C-MAHM-E 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 AT24C02C-MAHM-E?
For technical support, including AT24C02C-MAHM-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C02C-MAHM-E requirements.
6.How does Aetrix verify that AT24C02C-MAHM-E is sourced from the original manufacturer or authorized distributors?
All AT24C02C-MAHM-E 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 AT24C02C-MAHM-E meets industry standards.
7.What is the process for return or replacement of AT24C02C-MAHM-E?
All AT24C02C-MAHM-E units undergo pre-shipment inspection (PSI). If there is an issue with AT24C02C-MAHM-E, 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 AT24C02C-MAHM-E part is unused and in its original packaging.
Return procedure for AT24C02C-MAHM-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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