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Microchip Technology AT24HC02BN-SH-B
- Part No.:
- AT24HC02BN-SH-B
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24HC02BN-SH-B.pdf
- Description:
- IC EEPROM 2KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,386
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Product details
Overview
AT24HC02BN-SH-B from Microchip Technology is an I²C-compatible automotive-grade serial EEPROM with 2-Kbit (256 × 8) memory organization, operating across 2.5V–5.5V supply range and qualified to AEC-Q100 Grade 1 (−40°C to +125°C). It features hardware write protection via WP pin, 16-byte page write capability, and ultra-low standby current of 18 μA max - deployed in engine control units, ADAS sensor modules, and body electronics for nonvolatile configuration storage.
For engineers reviewing the AT24HC02BN-SH-B datasheet, AT24HC02BN-SH-B pinout, AT24HC02BN-SH-B application, or AT24HC02BN-SH-B equivalent, key selection criteria include its automotive temperature rating, I²C Fast Mode (400 kHz) support, internal pull-down on A1/A2/WP pins, 5 ms max write cycle time, and SOIC-8 package compatibility with legacy board layouts.
Technical Context
The AT24HC02BN-SH-B implements a two-wire I²C slave interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and open-drain bidirectional data transfer. Its memory array is organized as 256 words × 8 bits, supporting random and sequential reads, current-address reads, and partial-page writes within a single 16-byte row.
Write protection is implemented via dedicated WP pin controlling upper-half array lock (2K-bit), while device addressing uses hard-wired A1/A2 pins enabling up to four devices on one bus. Internal power-on reset (POR) ensures reliable initialization at VCC ≥ 2.0 V, with tPUP = 100 µs minimum delay before first command acceptance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2-Kbit (256 × 8), sufficient for calibration tables, fault logs, and trim values in compact ECUs |
| Supply voltage | 2.5V–5.5V - supports direct connection to 3.3V or 5V automotive microcontroller I/O rails |
| Operating temperature | −40°C to +125°C (AEC-Q100 Grade 1) - validated for under-hood and transmission-control environments |
| I²C speed mode | Up to 400 kHz Fast Mode - enables <2.5 ms typical read/write transaction time for real-time parameter updates |
| Write endurance | 1,000,000 cycles - supports frequent recalibration or logging without premature wear-out |
| Data retention | 100 years at 55°C - guarantees long-term integrity of safety-critical configuration data over vehicle lifetime |
| Standby current | 18 μA max at 5.0V - minimizes parasitic drain in always-on vehicle subsystems |
| Page write size | 16 bytes per cycle - reduces bus overhead when updating multi-byte parameters like PID coefficients |
Pinout & Package
AT24HC02BN-SH-B is supplied in an 8-lead SOIC package (3.9 mm × 4.9 mm, 1.27 mm pitch), pin-compatible with industry-standard AT24Cxx EEPROMs and suitable for reflow soldering in automotive PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No-connect | Unused internal pad; must remain unconnected per Microchip design - no routing or pull-up required |
| 2 (A1) | Hardware address input | Hard-wired to GND or VCC to set 1 of 4 possible I²C addresses; internally pulled down if floating |
| 3 (A2) | Hardware address input | Second address bit; combined with A1 to enable up to four devices on same I²C bus without software arbitration |
| 4 (GND) | Ground reference | System ground return path; requires low-impedance connection to minimize noise coupling into SDA/SCL |
| 5 (SDA) | Serial data I/O | Open-drain bidirectional line; requires external 1.3 kΩ pull-up for 400 kHz operation per I²C spec |
| 6 (SCL) | Serial clock input | Master-generated clock; rising edge latches input, falling edge clocks out data - must be pulled high externally |
| 7 (WP) | Write-protect control | Logic high disables writes to upper 1K-bit half-array; internally pulled down - tie to GND for full write access |
| 8 (VCC) | Power supply | 2.5V–5.5V operation; slew rate ≤ 0.1 V/µs required during power-up to ensure POR circuit reliability |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 certified - validated for use in safety-relevant systems including powertrain and chassis control |
| Hardware write protection | WP pin locks upper 1K-bit memory segment - prevents accidental overwrite of critical firmware parameters |
| Noise-immune interface | Schmitt-trigger inputs + spike suppression filters - maintains I²C communication integrity in high-EMI engine bays |
| Low-power standby | 18 μA max at 5V - extends battery life in always-on telematics and gateway modules |
| Fast page writes | 5 ms max self-timed write cycle for 1–16 bytes - enables rapid field updates without blocking MCU execution |
| Green packaging | Lead-free, halide-free, RoHS-compliant SOIC - meets global automotive environmental compliance requirements |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
|
Use Scenario: Storing adaptive fuel trim values, misfire counters, and diagnostic trouble codes (DTCs) across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration and event logging storage with guaranteed data retention over 10+ years. Use Value: Enables regulatory-compliant OBD-II compliance and long-term drivability learning without external backup power. |
Use Scenario: Retaining camera calibration offsets, radar beam alignment data, and sensor fusion coefficients after vehicle shutdown. IC Role / Device Role / Timing Role: Persistent parameter storage synchronized with CAN-based boot-up sequences. Use Value: Eliminates factory recalibration requirement after battery disconnect or module replacement. |
| Body Control Module (BCM) | Electric Power Steering (EPS) |
|
Use Scenario: Saving user preferences (mirror position, seat settings, lighting profiles) linked to key fob IDs. IC Role / Device Role / Timing Role: Low-power, high-endurance storage interfaced directly to 3.3V microcontroller I²C peripheral. Use Value: Supports >100,000 seat/mirror adjustment cycles over vehicle lifetime without data corruption. |
Use Scenario: Holding torque sensor zero-point compensation, motor phase advance tables, and fault history logs. IC Role / Device Role / Timing Role: Safety-aware nonvolatile memory with write-protection for ASIL-B relevant parameters. Use Value: Ensures steering assist continuity and traceable fault recording per ISO 26262 requirements. |
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 | Commercial-grade (−40°C to +85°C), same 2-Kbit density and SOIC-8 package but lacks AEC-Q100 qualification | Not approved for under-hood or safety-critical automotive use; limited to infotainment or HVAC control | Select only for cost-sensitive non-automotive designs where extended temperature and qualification are unnecessary |
| M95256-DFMN6TP | 256-Kbit SPI EEPROM (not I²C), 8-pin TSSOP, 5.5V max, −40°C to +125°C, but requires separate CS pin and different protocol stack | Requires MCU SPI peripheral and driver rewrite; incompatible with existing I²C firmware and layout | Consider only when migrating to SPI architecture or needing higher density - not a drop-in replacement |
Compared with AT24HC02BN-SH-B, AT24C02C-SSHM-T offers identical pinout and interface but omits automotive qualification and extended temperature validation, while M95256-DFMN6TP provides greater capacity and same temperature range but mandates SPI hardware and software redesign - neither serves as a functional or layout-compatible substitute without system-level changes.
Availability
AT24HC02BN-SH-B is available at Aetrix Electronics and suitable for engine control units, ADAS sensor modules, and body electronics requiring stable component supply across automotive production lifecycles.
Supply support for AT24HC02BN-SH-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 manufacturer specializing in microcontrollers, analog devices, and memory solutions for automotive, industrial, and communications markets.
The AT24HC02BN-SH-B belongs to Microchip's automotive-qualified serial EEPROM product line, designed specifically for robust, low-power, nonvolatile data storage in harsh-temperature vehicle subsystems.
FAQ
What is the maximum I²C clock frequency supported by the AT24HC02BN-SH-B?
The AT24HC02BN-SH-B supports I²C Fast Mode up to 400 kHz. This is confirmed in Microchip's DS20006149A datasheet Section 4.4, where fSCL maximum is specified as 400 kHz under AC characteristics. The device does not support High-Speed Mode (3.4 MHz) or Ultra-Fast Mode.
Does the AT24HC02BN-SH-B require external pull-up resistors on SDA and SCL lines?
Yes, the AT24HC02BN-SH-B requires external pull-up resistors on both SDA and SCL. Its SDA pin is open-drain and SCL is an input-only pin; Microchip specifies a 1.3 kΩ pull-up for 400 kHz operation with 100 pF bus capacitance per Section 4.4 of the datasheet.
How is write protection implemented on the AT24HC02BN-SH-B?
Write protection on the AT24HC02BN-SH-B is controlled by the WP pin: when tied to VCC, it inhibits writes to the upper 1K-bit memory segment (addresses 0x080–0x0FF); when grounded, full memory access is enabled. The pin is internally pulled down, so floating defaults to unprotected mode - but Microchip recommends hard-wiring for reliability.
What is the memory organization of the AT24HC02BN-SH-B?
The AT24HC02BN-SH-B is organized as 256 words × 8 bits (2-Kbit total), arranged in 16 pages of 16 bytes each. This structure enables efficient 16-byte page writes within the same memory row (address bits A7–A4 constant), as defined in Section 6 and Table 6-2 of the official datasheet.
Is the AT24HC02BN-SH-B pin-compatible with the AT24C02 series?
Yes, the AT24HC02BN-SH-B is pin-compatible with standard AT24C02 variants in SOIC-8 package, sharing identical pinout (NC, A1, A2, GND, SDA, SCL, WP, VCC), voltage range, and I²C protocol. However, it adds AEC-Q100 Grade 1 qualification and tighter DC/AC specs for automotive use - making it a direct upgrade path.
AT24HC02BN-SH-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- 550 ns
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24HC02BN-SH-B FAQ
1.How can I place an order for AT24HC02BN-SH-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24HC02BN-SH-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 AT24HC02BN-SH-B reliable?
The price and inventory of AT24HC02BN-SH-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24HC02BN-SH-B is usually 5 days.
3.What payment methods are accepted for AT24HC02BN-SH-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24HC02BN-SH-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24HC02BN-SH-B?
AT24HC02BN-SH-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24HC02BN-SH-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 AT24HC02BN-SH-B?
For technical support, including AT24HC02BN-SH-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24HC02BN-SH-B requirements.
6.How does Aetrix verify that AT24HC02BN-SH-B is sourced from the original manufacturer or authorized distributors?
All AT24HC02BN-SH-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 AT24HC02BN-SH-B meets industry standards.
7.What is the process for return or replacement of AT24HC02BN-SH-B?
All AT24HC02BN-SH-B units undergo pre-shipment inspection (PSI). If there is an issue with AT24HC02BN-SH-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 AT24HC02BN-SH-B part is unused and in its original packaging.
Return procedure for AT24HC02BN-SH-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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