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Microchip Technology AT24C02D-SSHM-T
- Part No.:
- AT24C02D-SSHM-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C02D-SSHM-T.pdf
- Description:
- IC EEPROM 2KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,305
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Product details
Overview
AT24C02D-SSHM-T from Microchip Technology is a 2-Kbit (256 × 8) I²C-compatible serial EEPROM in an 8-lead SOIC 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 embedded controllers, sensor calibration modules, and power management ICs.
For engineers reviewing the AT24C02D-SSHM-T datasheet, AT24C02D-SSHM-T pinout, AT24C02D-SSHM-T application, or AT24C02D-SSHM-T equivalent, key selection criteria include I²C bus voltage compatibility (1.7–3.6V), page-write capability (8-byte pages), write endurance (1M cycles), data retention (100 years), and WP pin behavior under floating vs. driven conditions.
Technical Context
The AT24C02D-SSHM-T implements a two-wire I²C slave interface with Schmitt-triggered SCL/SDA inputs, integrated spike suppression filters, and open-drain bidirectional SDA. It supports Standard (100 kHz), Fast (400 kHz), and Fast Mode Plus (1 MHz) timing across its full 1.7–3.6V VCC range, with automatic pull-down on A0/A1/A2/WP pins when unconnected.
Internally organized as 32 pages of 8 bytes (256 × 8), it features hardware address decoding (A0–A2), write-protect logic that inhibits all writes when WP = VCC, and self-timed internal write cycles completing within 5 ms. Power-on reset (POR) ensures reliable initialization with tPUP ≥ 100 µs after VCC stabilization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8 bits), enabling storage of 256 bytes of configuration or calibration data |
| VCC Range | 1.7V to 3.6V - compatible with modern low-voltage microcontrollers and battery-powered systems |
| I²C Speed Modes | 100 kHz (Std), 400 kHz (Fast), 1 MHz (FM+) - supports high-throughput firmware updates and real-time parameter logging |
| Write Endurance | 1,000,000 cycles - suitable for frequent recalibration or event-logging applications |
| Data Retention | 100 years at 55°C - guarantees long-term reliability in industrial deployments without refresh |
| Standby Current | 0.8 μA max at 3.6V - minimizes quiescent power in always-on IoT edge nodes |
| Page Write Size | 8-byte pages with partial-page write support - enables efficient small-data updates without erasing full sectors |
Pinout & Package
AT24C02D-SSHM-T is supplied in an 8-lead SOIC (Small Outline Integrated Circuit) package with standard 1.27 mm pitch, JEDEC MS-012AC compliant, and RoHS-compliant green finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Hardware Address Input | LSB of 3-bit device address; pulled down internally if floating - enables up to 8 devices on one I²C bus |
| A1 | Hardware Address Input | Middle bit of device address; determines unique I²C slave address alongside A0 and A2 |
| A2 | Hardware Address Input | MSB of device address; combined with A0/A1, selects one of eight possible 7-bit addresses (0x50–0x57) |
| GND | Ground Reference | System return path for VCC and signal logic; must be connected to PCB ground plane for noise immunity |
| SDA | Serial Data Line | Open-drain bidirectional I²C data line requiring external pull-up resistor (≤10 kΩ); shared across multiple slaves |
| SCL | Serial Clock Line | Input-only I²C clock line; requires external pull-up; timing-critical for 1 MHz FM+ operation |
| WP | Write-Protect Control | Active-high hardware lock: tied to VCC disables all writes; tied to GND enables full read/write access |
| VCC | Power Supply | 1.7–3.6V supply input; must ramp monotonically at ≤0.1 V/µs during power-up to ensure POR reliability |
Key Features
| Feature | Design Value |
|---|---|
| Fast Mode Plus Support | 1 MHz I²C operation at 2.5–3.6V enables 10× faster writes vs. Standard mode - critical for time-sensitive firmware recovery |
| Hardware Write Protection | WP pin provides tamper-resistant, non-software-dependent memory lock - essential for secure boot configuration storage |
| Ultra-Low Standby Current | 0.8 μA max ensures <1 µW standby power draw - extends battery life in portable medical and sensor devices |
| Internal Pull-Down on Address Pins | A0/A1/A2 default to logic 0 when unconnected - simplifies design for single-device systems without external resistors |
| ESD Robustness | 4,000V HBM rating protects against handling and board-level ESD events - reduces field failure risk in manufacturing environments |
Applications
| Industrial Sensor Calibration | Embedded Controller Configuration |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed during system boot and runtime recalibration via I²C. Use Value: Enables field-replaceable sensors without firmware reflash; 100-year retention ensures calibration integrity over equipment lifetime. | Use Scenario: Holding user-defined settings (e.g., display brightness, communication baud rate) in HVAC control panels. IC Role / Device Role / Timing Role: Persistent configuration store updated only on menu changes, read at power-on initialization. Use Value: Eliminates need for supercapacitor-backed RAM; 1M write cycles support >10 years of daily setting adjustments. |
| Power Management IC Settings | Firmware Bootloader Metadata |
Use Scenario: Saving dynamic voltage/frequency scaling (DVFS) tables and fault-history logs in DC-DC controller modules. IC Role / Device Role / Timing Role: Secondary nonvolatile memory co-located with PMIC, accessed via dedicated I²C bus segment. Use Value: Supports adaptive power optimization without MCU intervention; 8-byte page writes minimize bus occupancy during log updates. | Use Scenario: Storing image checksums, version IDs, and rollback counters for secure dual-bank bootloader implementations. IC Role / Device Role / Timing Role: Trusted metadata repository verified before each firmware launch; write-protected after initial programming. Use Value: WP pin hardwired to VCC prevents accidental corruption; 1.7V operation ensures validity during brown-out conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C02C-SSHM-T | Same 2-Kbit capacity and SOIC-8 package, but rated for 1.8–5.5V VCC range and lacks Fast Mode Plus (max 400 kHz) | Not suitable for 1.7V systems or 1 MHz timing-critical logging; higher VCC ceiling allows direct connection to 5V logic rails | Select AT24C02C-SSHM-T only if operating above 1.8V and no FM+ bandwidth required |
| M24C02-RMN6TP | 2-Kbit EEPROM in 8-lead TSSOP, 1.8–5.5V, supports 400 kHz I²C, 1M endurance, but no WP pin | Requires software-based write protection; incompatible where hardware lock is mandated by safety standards (e.g., IEC 62368) | Choose M24C02-RMN6TP only when WP functionality is unnecessary and TSSOP footprint is preferred |
Compared with AT24C02D-SSHM-T, AT24C02C-SSHM-T trades FM+ speed and 1.7V operation for wider VCC tolerance, while M24C02-RMN6TP sacrifices hardware write protection for cost-sensitive consumer designs - neither offers pin-to-pin or functional equivalence without circuit modification.
Availability
AT24C02D-SSHM-T is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded controller configuration, and power management IC settings requiring stable component supply, long-term data retention, and robust I²C interoperability.
Supply support for AT24C02D-SSHM-T 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 Inc. is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with ISO 9001-certified quality systems and global distribution.
The AT24CxxD series targets low-power, space-constrained embedded systems needing reliable, low-voltage serial EEPROM for configuration, calibration, and event logging - optimized for industrial, automotive, and IoT endpoints.
FAQ
What is the maximum I²C clock frequency supported by AT24C02D-SSHM-T?
The AT24C02D-SSHM-T supports up to 1 MHz Fast Mode Plus (FM+) operation, but only when VCC is between 2.5V and 3.6V. At 1.7–2.5V, maximum speed is limited to 400 kHz Fast Mode. This voltage-dependent timing ensures signal integrity across its full operating range and must be accounted for in clock generator configuration for AT24C02D-SSHM-T.
Does AT24C02D-SSHM-T require external pull-up resistors on SDA and SCL lines?
Yes, AT24C02D-SSHM-T requires external pull-up resistors on both SDA and SCL lines because SDA is open-drain and SCL is input-only. Recommended values are ≤10 kΩ for SDA; exact value depends on bus capacitance and target I²C speed - e.g., 1.3 kΩ for 1 MHz FM+, 4 kΩ for 400 kHz, and 10 kΩ for 100 kHz. No internal pull-ups are provided on AT24C02D-SSHM-T.
How does the WP pin function on AT24C02D-SSHM-T, and what happens if it's left unconnected?
When WP is tied to VCC, AT24C02D-SSHM-T disables all write operations to its entire memory array. If left unconnected, the internal strong pull-down drives WP to GND, enabling normal writes - but Microchip recommends hardwiring WP to avoid noise-induced glitches. Floating WP is not recommended in noisy industrial environments due to capacitive coupling risks affecting AT24C02D-SSHM-T reliability.
What is the memory organization of AT24C02D-SSHM-T, and how does page writing work?
AT24C02D-SSHM-T organizes its 256 bytes into 32 pages of 8 bytes each. Page writes allow up to 8 sequential bytes to be written in a single I²C transaction, crossing page boundaries is prohibited. For example, writing to address 0x07–0x0F wraps to page 0x01, requiring two separate page writes. This architecture optimizes AT24C02D-SSHM-T for compact firmware updates and avoids unintended overwrites.
Is AT24C02D-SSHM-T compatible with standard I²C protocol and level-shifted buses?
Yes, AT24C02D-SSHM-T is fully compliant with standard I²C specification (UM10204) for addressing, ACK/NACK, Start/Stop, and timing - including support for repeated Start. Its 1.7–3.6V VCC range and CMOS-compatible VIH/VIL thresholds (0.7×VCC / 0.3×VCC) enable direct interfacing with 1.8V, 2.5V, and 3.3V MCUs. Level-shifting is only needed when connecting to 5V I²C masters, which AT24C02D-SSHM-T does not support natively.
AT24C02D-SSHM-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- 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:
- 450 ns
- Voltage - Supply:
- 1.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C02D-SSHM-T FAQ
1.How can I place an order for AT24C02D-SSHM-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C02D-SSHM-T 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-SSHM-T reliable?
The price and inventory of AT24C02D-SSHM-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C02D-SSHM-T is usually 5 days.
3.What payment methods are accepted for AT24C02D-SSHM-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C02D-SSHM-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C02D-SSHM-T?
AT24C02D-SSHM-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C02D-SSHM-T 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-SSHM-T?
For technical support, including AT24C02D-SSHM-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C02D-SSHM-T requirements.
6.How does Aetrix verify that AT24C02D-SSHM-T is sourced from the original manufacturer or authorized distributors?
All AT24C02D-SSHM-T 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-SSHM-T meets industry standards.
7.What is the process for return or replacement of AT24C02D-SSHM-T?
All AT24C02D-SSHM-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C02D-SSHM-T, 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-SSHM-T part is unused and in its original packaging.
Return procedure for AT24C02D-SSHM-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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