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Microchip Technology AT24HC02C-SSHM-T
- Part No.:
- AT24HC02C-SSHM-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24HC02C-SSHM-T.pdf
- Description:
- IC EEPROM 2KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:14,309
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Product details
Overview
AT24HC02C-SSHM-T from Microchip Technology is a 2-Kbit I²C-compatible serial EEPROM organized as 256 × 8, operating from 1.7V to 5.5V with industrial temperature range (−40°C to +85°C), 1 MHz Fast Mode Plus support at ≥2.5V, and hardware write-protection via WP pin - used for nonvolatile configuration storage in embedded microcontroller systems.
For engineers reviewing the AT24HC02C-SSHM-T datasheet, AT24HC02C-SSHM-T pinout, AT24HC02C-SSHM-T application, or AT24HC02C-SSHM-T equivalent, key selection criteria include low-voltage operation down to 1.7V, page-write capability (8-byte pages), 1,000,000 write endurance, 100-year data retention, and Schmitt-triggered noise-immune I²C interface compatibility across standard/fast/FM+ modes.
Technical Context
The AT24HC02C-SSHM-T implements a two-wire I²C slave interface with open-drain SDA/SCL pins, integrated Schmitt triggers and noise filters on all inputs, and hardware address decoding via A0–A2 pins supporting up to eight devices on one bus. It uses an internal high-voltage generation circuit for EEPROM programming and includes Power-on Reset (POR) with 100 µs tPUP delay after stable VCC.
Memory is organized into 32 pages of 8 bytes each, enabling partial page writes. Write protection is implemented via the WP pin: tied to VCC to lock the upper 1K-bit half-array, or GND for full write access. The device enters Standby mode automatically after Stop condition or write completion, drawing ≤6 µA at 5.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,048 bits (256 × 8), directly addressable via 8-bit word address - enables compact firmware configuration storage without external address latching. |
| Supply Voltage Range | 1.7V to 5.5V - supports direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level-shifting. |
| I²C Speed Modes | 100 kHz (std), 400 kHz (fast), 1 MHz (FM+) - FM+ enabled only at VCC ≥2.5V; allows high-throughput updates in power-constrained systems. |
| Write Endurance | 1,000,000 cycles - ensures reliable logging or parameter tuning over product lifetime in industrial control nodes. |
| Data Retention | 100 years at 55°C - guarantees long-term integrity of calibration data, serial numbers, or security keys without refresh. |
| Active/Standby Current | ≤3 mA active (5V, 400 kHz write), ≤6 µA standby (5.5V) - minimizes battery drain in always-on IoT edge sensors. |
| Write Cycle Time | ≤5 ms self-timed - eliminates need for external polling delay; ACK polling supported for precise timing control. |
Pinout & Package
AT24HC02C-SSHM-T is supplied in an 8-lead SOIC package (SOIC-8, 150 mil width), RoHS-compliant and halide-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Hardware Device Address Input | Configures LSB of 3-bit slave address; tied high/low to enable multi-device I²C bus addressing (up to 8 units). |
| A1 | Hardware Device Address Input | Configures middle bit of slave address; must be externally biased - internally pulled down if floating but susceptible to capacitive coupling. |
| A2 | Hardware Device Address Input | Configures MSB of slave address; determines unique I²C address (1010xxxA) alongside A0/A1 and R/W bit. |
| GND | Ground Reference | System ground return path; required for proper biasing of internal pull-downs on A0/A1/A2/WP pins. |
| SDA | Serial Data Bidirectional I/O | Open-drain line requiring external pull-up (≤10 kΩ); transmits/receives I²C data and ACK/NACK bits on rising/falling SCL edges. |
| SCL | Serial Clock Input | Master-generated clock; latches input data on rising edge, outputs data on falling edge; requires pull-up for idle-high bus state. |
| WP | Write-Protect Control Input | Hardware lock: VCC disables writes to upper 1K-bit array; GND enables full memory access - prevents accidental firmware corruption. |
| VCC | Power Supply Input | 1.7V–5.5V supply; powers logic and EEPROM programming circuitry; POR activates at ≥1.5V threshold with 100 µs tPUP delay. |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | Functional down to 1.7V - enables direct integration with ultra-low-power MCUs (e.g., PIC16LF, SAM L21) without voltage translation. |
| Page Write Mode | 8-byte page buffer with partial-page write support - reduces I²C transaction count when updating adjacent configuration fields. |
| Noise-Immune Interface | Schmitt-triggered inputs + filtered SDA/SCL - suppresses EMI in motor-driven industrial environments (e.g., PLC I/O modules). |
| Hardware Write Protection | WP pin locks upper half-array (1024 bits) - safeguards critical bootloader parameters while allowing runtime user-data updates. |
| Green Packaging | Lead-free, halide-free, RoHS-compliant SOIC-8 - meets IPC/JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) requirements. |
Applications
| Industrial Sensor Node | Medical Device Calibration |
|---|---|
|
Use Scenario: Battery-powered wireless temperature/humidity sensor with auto-calibration offset storage. IC Role / Device Role / Timing Role: Nonvolatile storage for factory-trimmed sensor coefficients and field-collected drift compensation values. Use Value: Enables recalibration without firmware update; 100-year retention preserves accuracy across device lifecycle. |
Use Scenario: Portable blood glucose meter storing patient-specific calibration curves and usage history. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter storage with hardware write-lock for regulatory compliance (IEC 62304). Use Value: WP pin prevents unauthorized modification of calibration data; 1.7V operation extends battery life during low-power sleep. |
| Smart Energy Meter | Automotive Body Control Module |
|
Use Scenario: DIN-rail mounted electricity meter retaining tariff schedules, pulse constants, and tamper logs. IC Role / Device Role / Timing Role: High-reliability configuration and event-log storage in harsh electrical environments with voltage transients. Use Value: >4 kV ESD rating and noise-filtered I²C interface ensure robust communication amid switching power supply noise. |
Use Scenario: In-vehicle lighting controller storing LED driver settings, fault history, and CAN node configuration. IC Role / Device Role / Timing Role: Persistent storage for adaptive lighting profiles and diagnostic trouble codes (DTCs) across ignition cycles. Use Value: 1,000,000 write cycles support frequent DTC logging; −40°C to +85°C rating matches under-hood thermal requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C02D-SSHM-T | Same 2-Kbit capacity, but supports 1 MHz FM+ at 1.7V–5.5V (no voltage restriction); updated revision with enhanced ESD (>6 kV). | Preferred where full 1 MHz speed is required below 2.5V (e.g., 1.8V FPGA configuration managers). | Select AT24C02D-SSHM-T if FM+ operation at 1.7V is mandatory; otherwise AT24HC02C-SSHM-T remains optimal for cost-sensitive 3.3V/5V designs. |
| M24C02-RMN6TP | 2-Kbit I²C EEPROM from STMicroelectronics; identical 1.7V–5.5V range and SOIC-8 package, but rated for 400 kHz max (no FM+ mode). | Suitable for legacy systems constrained to standard/fast mode only; lacks 1 MHz capability and half-array WP feature. | Choose M24C02-RMN6TP only when cross-supplier qualification mandates ST parts; AT24HC02C-SSHM-T offers superior speed and protection granularity. |
Compared with AT24C02D-SSHM-T, the AT24HC02C-SSHM-T trades FM+ voltage flexibility for proven industrial deployment maturity; versus M24C02-RMN6TP, it delivers higher-speed communication and finer-grained write protection - critical for firmware update resilience in connected devices.
Availability
AT24HC02C-SSHM-T is available at Aetrix Electronics and suitable for industrial sensor nodes, medical calibration systems, smart energy meters, automotive body controllers, and portable instrumentation requiring stable component supply across extended product lifecycles.
Supply support for AT24HC02C-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 is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with ISO 9001-certified manufacturing and global distribution.
The AT24HC02C-SSHM-T belongs to Microchip's AT24HC serial EEPROM product line, designed specifically for low-voltage, high-reliability nonvolatile storage in space-constrained embedded systems requiring I²C simplicity and industrial-grade endurance.
FAQ
What is the maximum I²C clock frequency supported by the AT24HC02C-SSHM-T?
The AT24HC02C-SSHM-T supports 100 kHz (Standard Mode), 400 kHz (Fast Mode), and 1 MHz (Fast Mode Plus). However, FM+ operation requires VCC ≥2.5V; below that, only Standard and Fast Modes are guaranteed. This voltage-dependent speed scaling ensures signal integrity across diverse host platforms while maintaining backward compatibility.
Does the AT24HC02C-SSHM-T require external pull-up resistors on SDA and SCL lines?
Yes, the AT24HC02C-SSHM-T requires external pull-up resistors on both SDA and SCL lines because these pins are open-drain. Microchip specifies maximum values of 10 kΩ for SDA and recommends ≤4 kΩ for 400 kHz operation. Proper pull-up sizing ensures valid rise times (tR/tF ≤300 ns) and avoids bus contention in multi-slave configurations.
How does the Write-Protect (WP) pin function on the AT24HC02C-SSHM-T?
When the WP pin is driven to VCC, the upper half (1024 bits) of the AT24HC02C-SSHM-T memory array is write-protected; only the lower half remains writable. When WP is at GND, full memory access is enabled. If left floating, WP defaults to GND due to internal pull-down, but Microchip strongly recommends hard-wiring it to avoid noise-induced protection errors.
What is the endurance and data retention specification for the AT24HC02C-SSHM-T?
The AT24HC02C-SSHM-T is rated for 1,000,000 write cycles per memory location and guarantees 100 years of data retention at 55°C. These specifications are validated per JEDEC standards and reflect actual cell-level performance - not typical or average values - making it suitable for mission-critical parameter storage in infrastructure equipment.
Is the AT24HC02C-SSHM-T compatible with 1.8V microcontrollers?
Yes, the AT24HC02C-SSHM-T operates fully within 1.7V–5.5V, including 1.8V systems. Its I²C interface meets SMBus 2.0 voltage thresholds (VIH ≥0.7×VCC, VIL ≤0.3×VCC), and its 100 kHz/400 kHz modes are functional at 1.8V. No level-shifting circuitry is needed when interfacing with 1.8V MCUs such as the Silicon Labs EFM32HG or NXP LPC802.
AT24HC02C-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:
- 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-SOIC
AT24HC02C-SSHM-T FAQ
1.How can I place an order for AT24HC02C-SSHM-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24HC02C-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 AT24HC02C-SSHM-T reliable?
The price and inventory of AT24HC02C-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 AT24HC02C-SSHM-T is usually 5 days.
3.What payment methods are accepted for AT24HC02C-SSHM-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24HC02C-SSHM-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24HC02C-SSHM-T?
AT24HC02C-SSHM-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24HC02C-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 AT24HC02C-SSHM-T?
For technical support, including AT24HC02C-SSHM-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24HC02C-SSHM-T requirements.
6.How does Aetrix verify that AT24HC02C-SSHM-T is sourced from the original manufacturer or authorized distributors?
All AT24HC02C-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 AT24HC02C-SSHM-T meets industry standards.
7.What is the process for return or replacement of AT24HC02C-SSHM-T?
All AT24HC02C-SSHM-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24HC02C-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 AT24HC02C-SSHM-T part is unused and in its original packaging.
Return procedure for AT24HC02C-SSHM-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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