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Microchip Technology AT24HC02C-XHM-B
- Part No.:
- AT24HC02C-XHM-B
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT24HC02C-XHM-B.pdf
- Description:
- IC EEPROM 2KBIT I2C 1MHZ 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:104
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Product details
Overview
AT24HC02C-XHM-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 2.5–5.5V, and hardware write-protection via WP pin. It serves as nonvolatile configuration storage in microcontroller-based systems requiring low-power, noise-immune bus communication.
For engineers reviewing the AT24HC02C-XHM-B datasheet, AT24HC02C-XHM-B pinout, AT24HC02C-XHM-B application, or AT24HC02C-XHM-B equivalent, key selection criteria include its 8-pin TSSOP package, 5 ms max self-timed write cycle, 1,000,000 write endurance, 100-year data retention, and Schmitt-triggered I²C interface with noise filtering - critical for embedded control, sensor calibration, and power-management firmware storage.
Technical Context
The AT24HC02C-XHM-B implements a two-wire I²C slave interface with bidirectional SDA and unidirectional SCL, supporting Standard (100 kHz), Fast (400 kHz), and Fast Mode Plus (1 MHz) speeds depending on VCC level. Its internal address decoder uses A0–A2 pins to enable up to eight devices on one bus.
It features an integrated Power-on Reset (POR) circuit with 1.5 V threshold and 100 µs minimum command delay after stable VCC, plus hardware write protection that disables writes to the upper 1K-bit half-array when WP = VCC. Memory is organized into 32 pages of 8 bytes each, enabling partial page writes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2,048 bits (256 × 8), sufficient for firmware flags, calibration coefficients, or device ID storage |
| Supply voltage | 1.7V to 5.5V - enables direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level shifting |
| Write endurance | 1,000,000 cycles - supports frequent parameter updates in field-deployed industrial controllers |
| Data retention | 100 years at 55°C - ensures long-term reliability in sealed or high-temperature enclosures |
| Write cycle time | ≤5 ms - allows rapid configuration saves without blocking host MCU execution |
| I²C speed modes | 100 kHz (1.7–5.5V), 400 kHz (1.7–5.5V), 1 MHz (2.5–5.5V) - selectable bandwidth matching system timing budget |
| Active current | ≤3 mA max - minimizes power draw during active read/write in battery-backed applications |
| Standby current | ≤6 μA max at 5.5V - enables multi-year operation on coin-cell backup power |
Pinout & Package
AT24HC02C-XHM-B is supplied in an 8-lead TSSOP package (3.0 mm × 4.4 mm, 0.65 mm pitch), RoHS-compliant and halide-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device address input | Hardwired to GND or VCC to configure 1 of 8 possible I²C slave addresses (1010xxxR/W) |
| A1 | Device address input | Part of 3-bit hardware address; enables multi-device bus topology without software address conflict |
| A2 | Device address input | Completes 3-bit address; internally pulled down if floating - requires explicit biasing for deterministic operation |
| GND | Ground reference | System return path for VCC and I/O; must be low-impedance to ensure noise immunity on SDA/SCL |
| SDA | Serial data I/O | Open-drain bidirectional line; requires external pull-up (≤10 kΩ); supports wire-OR with other I²C slaves |
| SCL | Serial clock input | Master-generated clock; rising edge latches input, falling edge outputs data; Schmitt trigger suppresses bus noise |
| WP | Write-protect control | Hardware lock: tied to VCC disables writes to upper 1K-bit array; tied to GND enables full memory access |
| VCC | Power supply | 1.7–5.5V operation; slew rate ≤0.1 V/µs required for reliable POR; decoupling capacitor recommended |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-triggered inputs with noise filtering | Enables robust I²C operation in electrically noisy industrial environments (e.g., motor drives, PLCs) |
| 8-byte page write with partial writes | Allows efficient storage of variable-length configuration data without overwriting adjacent bytes |
| Ultra-low standby current (6 μA max) | Extends battery life in always-on IoT edge nodes and portable diagnostic tools |
| ESD protection >4,000 V | Reduces need for external TVS diodes in handheld or field-serviceable equipment |
| Green packaging (RoHS/halide-free) | Meets global environmental compliance requirements for medical, automotive, and consumer electronics |
Applications
| Industrial Sensor Calibration | Smart Meter Firmware Storage |
|---|---|
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 accessed during boot and runtime recalibration; retains values across power cycles and brownouts. Use Value: Eliminates need for external calibration EEPROM or OTP fuses, reducing BOM count while ensuring traceable, field-updatable calibration data. | Use Scenario: Holding tariff tables, metering constants, and security keys in utility-grade electricity meters operating in wide ambient temperatures. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for regulatory-critical parameters; WP pin prevents accidental overwrite during firmware updates. Use Value: Meets IEC 62056-21 and ANSI C12.19 requirements for data integrity and retention over 10+ year service life. |
| Medical Device Configuration | Automotive Body Control Module |
Use Scenario: Saving user preferences, alarm thresholds, and device-specific calibration data in portable patient monitors and infusion pumps. IC Role / Device Role / Timing Role: Fail-safe configuration store with 100-year retention; accessed only during initialization or maintenance mode. Use Value: Supports FDA 21 CFR Part 11 compliance by guaranteeing immutable audit trail metadata and calibrated settings across device lifetime. | Use Scenario: Storing seat position memory, mirror presets, and lighting profiles in automotive body control units (BCUs). IC Role / Device Role / Timing Role: Low-voltage (1.7V) compatible EEPROM enabling reliable operation during cold-cranking (battery dip to 6V). Use Value: Enables seamless user experience with persistent personalization without requiring constant MCU supervision or backup capacitors. |
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 1.7–5.5V (broader voltage range than AT24HC02C-XHM-B's 2.5–5.5V FM+) | Better suited for 1.8V-only systems needing full-speed I²C without voltage translation | Select when operating below 2.5V with 1 MHz requirement; otherwise AT24HC02C-XHM-B offers identical functionality at lower cost |
| M24C02-RMN6TP | STMicroelectronics part with identical 2-Kbit 256×8 organization, 1.7–5.5V, −40°C to +85°C, but rated for 400 kHz max (no FM+ mode) | Lacks 1 MHz capability; suitable where bus speed <400 kHz suffices and ST ecosystem preference exists | Choose for legacy ST-based designs or cost-sensitive applications where 1 MHz is unnecessary |
Compared with AT24HC02C-XHM-B, AT24C02D-SSHM-T extends Fast Mode Plus compatibility down to 1.7V - advantageous in ultra-low-voltage microcontroller interfaces - while M24C02-RMN6TP trades FM+ support for broader vendor qualification in conservative automotive Tier-2 supply chains.
Availability
AT24HC02C-XHM-B is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter firmware storage, and medical device configuration requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for AT24HC02C-XHM-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, FPGA, and memory solutions, with ISO 9001-certified manufacturing and global distribution.
The AT24HC02C belongs to Microchip's HC-series serial EEPROM product line, designed specifically for low-voltage, high-reliability nonvolatile storage in space-constrained industrial and automotive applications where extended data retention and noise immunity are mandatory.
FAQ
What is the maximum I²C clock frequency supported by the AT24HC02C-XHM-B?
The AT24HC02C-XHM-B supports 100 kHz (Standard Mode) and 400 kHz (Fast Mode) across its full 1.7–5.5V supply range, and 1 MHz (Fast Mode Plus) only when VCC is between 2.5V and 5.5V. This tiered speed capability allows designers to optimize bus throughput based on system voltage architecture without changing components.
How does the write-protect (WP) pin function on the AT24HC02C-XHM-B?
On the AT24HC02C-XHM-B, the WP pin provides hardware-level write protection: when tied to VCC, it disables all write operations to the upper half (1K-bit) of memory; when tied to GND, full memory access is enabled. The pin is internally pulled down if left floating, but Microchip recommends explicit biasing to avoid noise-induced misconfiguration.
What is the guaranteed data retention period for the AT24HC02C-XHM-B?
The AT24HC02C-XHM-B guarantees 100 years of data retention at 55°C, verified through accelerated qualification testing per JEDEC standards. At lower operating temperatures (e.g., 25°C), retention exceeds 200 years - making it suitable for infrastructure equipment with multi-decade service lifetimes.
Can the AT24HC02C-XHM-B operate reliably at 1.8V supply voltage?
Yes, the AT24HC02C-XHM-B is fully specified for operation at 1.8V: it supports 100 kHz and 400 kHz I²C modes, draws ≤3 mA active current, and maintains full functionality including page writes and WP control. Its 1.7V minimum VCC enables compatibility with modern low-power microcontrollers and FPGAs.
Does the AT24HC02C-XHM-B require external pull-up resistors on SDA and SCL lines?
Yes, the AT24HC02C-XHM-B requires external pull-up resistors on both SDA and SCL lines because SDA is open-drain and SCL is an input. Microchip specifies maximum pull-up values of 10 kΩ for 100 kHz, 4 kΩ for 400 kHz, and 1.3 kΩ for 1 MHz operation - values chosen to meet rise-time requirements under 100 pF bus capacitance.
AT24HC02C-XHM-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm 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-TSSOP
AT24HC02C-XHM-B FAQ
1.How can I place an order for AT24HC02C-XHM-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24HC02C-XHM-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-XHM-B reliable?
The price and inventory of AT24HC02C-XHM-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-XHM-B is usually 5 days.
3.What payment methods are accepted for AT24HC02C-XHM-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24HC02C-XHM-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24HC02C-XHM-B?
AT24HC02C-XHM-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24HC02C-XHM-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-XHM-B?
For technical support, including AT24HC02C-XHM-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24HC02C-XHM-B requirements.
6.How does Aetrix verify that AT24HC02C-XHM-B is sourced from the original manufacturer or authorized distributors?
All AT24HC02C-XHM-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-XHM-B meets industry standards.
7.What is the process for return or replacement of AT24HC02C-XHM-B?
All AT24HC02C-XHM-B units undergo pre-shipment inspection (PSI). If there is an issue with AT24HC02C-XHM-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-XHM-B part is unused and in its original packaging.
Return procedure for AT24HC02C-XHM-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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