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Microchip Technology AT24HC02C-SSHM-B
- Part No.:
- AT24HC02C-SSHM-B
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24HC02C-SSHM-B.pdf
- Description:
- IC EEPROM 2KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,346
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Product details
Overview
AT24HC02C-SSHM-B 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 - deployed in embedded control systems for parameter storage and calibration data retention.
For engineers reviewing the AT24HC02C-SSHM-B datasheet, AT24HC02C-SSHM-B pinout, AT24HC02C-SSHM-B application, or AT24HC02C-SSHM-B equivalent, key selection criteria include low-voltage operation down to 1.7V, 8-byte page write capability with ≤5 ms self-timed write cycle, 1,000,000 write endurance, and Schmitt-triggered noise-immune I²C interface compatibility across Standard/Fast/Fast Mode Plus speeds.
Technical Context
The AT24HC02C-SSHM-B implements a two-wire I²C slave interface with open-drain SDA/SCL pins requiring external pull-ups, integrated Schmitt triggers and noise filters on all inputs, and a hardware address decoder supporting up to eight devices on one bus via A0–A2 pins. It uses a cascaded memory architecture with 32 pages of 8 bytes each.
Write protection is implemented via dedicated WP pin that disables writes to upper half (1K) of memory when pulled high; internal power-on reset (POR) ensures reliable initialization with tPUP = 100 µs delay before first command, and VPOR = 1.5 V threshold prevents spurious operations during power ramp-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,048 bits (256 × 8), enabling compact nonvolatile storage for configuration registers or sensor calibration tables |
| Supply Voltage Range | 1.7V to 5.5V - supports direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level shifters |
| I²C Speed Modes | 100 kHz (Std), 400 kHz (Fast), 1 MHz (Fast Mode Plus at ≥2.5V) - enables scalable timing margins across host controller capabilities |
| Write Cycle Time | ≤5 ms maximum self-timed write - eliminates need for polling delay in most firmware implementations |
| Endurance & Retention | 1,000,000 write cycles / 100 years data retention at 55°C - validated for long-life industrial deployments |
| Active/Standby Current | ≤3 mA active (5V, 400 kHz read), ≤6 µA standby (5.5V) - critical for battery-powered or energy-harvesting edge nodes |
| Operating Temperature | –40°C to +85°C industrial grade - qualified for automotive cabin, industrial PLC, and outdoor IoT environments |
Pinout & Package
AT24HC02C-SSHM-B is supplied in an 8-lead SOIC package (SOIC-8, 150 mil width), RoHS-compliant and halide-free per Microchip's green packaging standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Hardware Device Address Input | Configures LSB of 7-bit I²C slave address; tied high/low to enable up to eight devices on same bus |
| A1 | Hardware Device Address Input | Configures middle bit of 7-bit I²C slave address; must be externally biased (not left floating) for deterministic addressing |
| A2 | Hardware Device Address Input | Configures MSB of 7-bit I²C slave address; internal strong pull-down defaults to '0' if unconnected |
| GND | Ground Reference | System ground return path; required for stable logic thresholds and ESD discharge path |
| SDA | Serial Data Bidirectional I/O | Open-drain line requiring external pull-up; carries I²C data, ACK/NACK, and address bits - shared across multiple slaves |
| SCL | Serial Clock Input | Master-generated clock controlling data sampling (rising edge) and output (falling edge); includes noise filtering |
| WP | Write-Protect Control Input | Pulled high to disable writes to upper 1K memory block; pulled low for full-array write access - no external logic needed |
| VCC | Power Supply Input | 1.7V–5.5V supply; powers internal charge pump for EEPROM programming and logic circuitry |
Key Features
| Feature | Design Value |
|---|---|
| FM+ Support (1 MHz) | Enables faster firmware updates and logging in resource-constrained hosts without sacrificing voltage flexibility |
| 8-Byte Page Write | Reduces I²C transaction overhead by writing up to 8 bytes per command - improves throughput vs. byte-write-only EEPROMs |
| Schmitt Trigger Inputs | Rejects bus noise spikes <100 ns (Fast Mode) or <50 ns (FM+) - eliminates false Start/Stop detection in electrically noisy environments |
| Half-Array Hardware WP | Protects critical calibration or security keys stored in upper 1K while allowing runtime updates to lower 1K user data |
| Ultra-Low Standby Current | 6 µA max at 5.5V allows multi-year operation on coin cells in always-on monitoring applications |
Applications
| Industrial Sensor Node | Automotive Body Controller |
|---|---|
Use Scenario: Storing calibrated offset/gain values for temperature and humidity sensors in field-deployed environmental monitors. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with infrequent writes and frequent reads; retains data across power cycles without backup battery. Use Value: Eliminates factory recalibration after firmware update; leverages 100-year data retention and –40°C to +85°C operation for unattended outdoor deployment. |
Use Scenario: Holding seat position memory, mirror angle presets, and lighting configuration in 12V automotive body control modules. IC Role / Device Role / Timing Role: I²C slave storing user preferences; accessed during vehicle power-up sequence before CAN bus initialization. Use Value: Operates reliably at 12V system (via 5V LDO) and withstands load-dump transients due to robust ESD (>4 kV) and wide VCC range. |
| Medical Infusion Pump | Smart Home Thermostat |
Use Scenario: Recording dose history, error logs, and safety-critical calibration constants in Class II medical devices. IC Role / Device Role / Timing Role: Secure parameter storage with hardware write protection preventing accidental overwrites during runtime. Use Value: WP pin blocks writes to upper 1K containing FDA-mandated calibration data while permitting dynamic log updates in lower 1K. |
Use Scenario: Saving user schedules, HVAC setpoints, and Wi-Fi credentials across firmware upgrades and brownouts. IC Role / Device Role / Timing Role: Low-power EEPROM interfaced directly to 3.3V MCU; accessed only during setup or recovery events. Use Value: 1.7V operation ensures functionality during brownout conditions; 6 µA standby current extends battery life in battery-backup thermostats. |
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 newer revision with enhanced ESD (6 kV HBM) and extended FM+ support down to 1.6V. | Preferred for new designs targeting ultra-low-voltage operation (<1.7V) or higher ESD immunity in consumer electronics. | Select AT24C02D-SSHM-T if designing for 1.6V systems or requiring >4 kV ESD margin; otherwise AT24HC02C-SSHM-B remains fully compatible. |
| M24C02-RMN6TP | 2-Kbit I²C EEPROM from STMicroelectronics; identical pinout and basic timing, but lacks FM+ mode and has 400 kHz max speed. | Suitable where 1 MHz bandwidth is unnecessary and ST's qualification pedigree (AEC-Q100 Grade 2) is required. | Choose M24C02-RMN6TP only if AEC-Q100 compliance is mandatory and 400 kHz I²C speed suffices; AT24HC02C-SSHM-B offers broader voltage and speed flexibility. |
Compared with AT24C02D-SSHM-T, AT24HC02C-SSHM-B trades minor ESD margin and 0.1V lower VCC minimum for proven field reliability and identical footprint; versus M24C02-RMN6TP, it delivers 2.5× faster write throughput and wider voltage tolerance at equivalent cost.
Availability
AT24HC02C-SSHM-B is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body controllers, medical infusion pumps, and smart home thermostats requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for AT24HC02C-SSHM-B 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 belongs to Microchip's legacy serial EEPROM product line, engineered for robust, low-power nonvolatile storage in cost-sensitive industrial and commercial systems where reliability across voltage and temperature extremes is essential.
FAQ
What is the maximum I²C clock frequency supported by AT24HC02C-SSHM-B?
The AT24HC02C-SSHM-B supports 100 kHz (Standard Mode), 400 kHz (Fast Mode), and 1 MHz (Fast Mode Plus) - but FM+ requires VCC ≥ 2.5V. At 1.7V–2.5V, maximum speed is 400 kHz. This dual-speed capability allows designers to optimize for noise immunity (lower speed) or throughput (higher speed) based on board layout and host controller capability.
Does AT24HC02C-SSHM-B require external pull-up resistors on SDA and SCL lines?
Yes, AT24HC02C-SSHM-B requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. Microchip specifies maximum values of 10 kΩ for SDA and recommends 1.3 kΩ for 1 MHz operation, 4 kΩ for 400 kHz, and 10 kΩ for 100 kHz - ensuring proper rise times and bus contention avoidance.
How does the write-protect (WP) pin function on AT24HC02C-SSHM-B?
On AT24HC02C-SSHM-B, the WP pin disables writes to the upper half (1K) of memory when driven high (VCC), while allowing full-array writes when grounded. If left floating, WP is internally pulled down - but Microchip strongly recommends hard-wiring it to avoid noise-induced protection errors. This enables selective protection of calibration data without software overhead.
What is the memory organization of AT24HC02C-SSHM-B?
The AT24HC02C-SSHM-B organizes its 2,048 bits as 256 words of 8 bits each, grouped into 32 pages of 8 bytes. This structure enables efficient 8-byte page writes and supports random or sequential reads. The device uses a single 8-bit word address byte to select any location, simplifying address arithmetic in firmware compared to larger EEPROMs with multi-byte addressing.
Is AT24HC02C-SSHM-B compatible with standard I²C protocol stacks?
Yes, AT24HC02C-SSHM-B is fully compliant with standard I²C protocol specifications, including Start/Stop conditions, ACK/NACK handshaking, 7-bit addressing (with fixed 1010 prefix and A2–A0 programmable bits), and repeated Start support. It requires no custom drivers - standard MCU I²C peripherals (e.g., STM32 HAL_I2C, Arduino Wire) interface directly without modification.
AT24HC02C-SSHM-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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-B FAQ
1.How can I place an order for AT24HC02C-SSHM-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24HC02C-SSHM-B 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-B reliable?
The price and inventory of AT24HC02C-SSHM-B 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-B is usually 5 days.
3.What payment methods are accepted for AT24HC02C-SSHM-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24HC02C-SSHM-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24HC02C-SSHM-B?
AT24HC02C-SSHM-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24HC02C-SSHM-B 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-B?
For technical support, including AT24HC02C-SSHM-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24HC02C-SSHM-B requirements.
6.How does Aetrix verify that AT24HC02C-SSHM-B is sourced from the original manufacturer or authorized distributors?
All AT24HC02C-SSHM-B 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-B meets industry standards.
7.What is the process for return or replacement of AT24HC02C-SSHM-B?
All AT24HC02C-SSHM-B units undergo pre-shipment inspection (PSI). If there is an issue with AT24HC02C-SSHM-B, 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-B part is unused and in its original packaging.
Return procedure for AT24HC02C-SSHM-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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