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Microchip Technology AT24HC02BN-SH-T
- Part No.:
- AT24HC02BN-SH-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24HC02BN-SH-T.pdf
- Description:
- IC EEPROM 2KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,165
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Product details
Overview
AT24HC02BN-SH-T 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 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 (≤18 μA at 5.0V), deployed in infotainment control modules for nonvolatile configuration storage.
For engineers reviewing the AT24HC02BN-SH-T datasheet, AT24HC02BN-SH-T pinout, AT24HC02BN-SH-T application, or AT24HC02BN-SH-T equivalent, key selection criteria include I²C fast-mode timing compliance (400 kHz), guaranteed write endurance (1,000,000 cycles), data retention (100 years), and SOIC-8 packaging with automotive temperature qualification.
Technical Context
The AT24HC02BN-SH-T implements a two-wire I²C slave interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and open-drain bidirectional data transfer. Its internal address decoder supports up to four devices on one bus using A1/A2 pins, and its hardware write-protection logic disables writes to upper half of memory when WP = VCC.
Memory is organized as 256 words × 8 bits, mapped into 16 pages of 16 bytes each. Write operations use self-timed internal programming with ≤5 ms completion, and read modes include current-address, random, and sequential access-all compliant with I²C standard- and fast-mode timing requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2-Kbit (256 × 8), enabling compact firmware parameter storage without external address latches |
| Supply Voltage | 2.5V to 5.5V - supports direct interfacing with 3.3V and 5V microcontrollers in automotive ECUs |
| Operating Temp | −40°C to +125°C (AEC-Q100 Grade 1) - validated for under-hood and dashboard module deployment |
| I²C Speed | Up to 400 kHz Fast mode - enables rapid configuration loading during boot without bus contention delays |
| Write Endurance | 1,000,000 cycles - sustains daily calibration updates over 10+ years of vehicle service life |
| Data Retention | 100 years at 55°C - ensures infotainment settings persist across full vehicle lifecycle without refresh |
| Standby Current | ≤18 μA at 5.0V - minimizes parasitic drain in always-on vehicle networks |
| Page Write Size | 16 bytes per cycle - reduces I²C transaction count when updating multi-byte configuration blocks |
Pinout & Package
AT24HC02BN-SH-T is supplied in an 8-lead SOIC package (body width 3.9 mm), RoHS-compliant and halide-free, with gull-wing leads suitable for automated surface-mount assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Unbonded die pad - must remain floating; no PCB trace or pull-up/pull-down required |
| 2 (A1) | Hardware Address Input | Configures LSB of device address (1010A2A1R/W); pulled down internally if unconnected |
| 3 (A2) | Hardware Address Input | Configures MSB of device address (1010A2A1R/W); enables up to four devices on same I²C bus |
| 4 (GND) | Ground Reference | System return path for VCC and I/O; requires low-impedance connection to PCB ground plane |
| 5 (SDA) | Serial Data I/O | Open-drain bidirectional line - requires external 1.3 kΩ pull-up for 400 kHz operation |
| 6 (SCL) | Serial Clock Input | Master-generated clock; rising edge latches input, falling edge outputs data - filtered for EMI immunity |
| 7 (WP) | Write-Protect Control | High = lock upper half (1K) of memory; low = full write access; internal pull-down if floating |
| 8 (VCC) | Power Supply | 2.5V–5.5V input; must ramp monotonically at ≤0.1 V/µs with ≥100 µs stabilization before first command |
Key Features
| Feature | Design Value |
|---|---|
| Automotive Qualification | AEC-Q100 Grade 1 certified - eliminates need for additional reliability validation in Tier 1 ECU designs |
| Hardware Write Protection | WP pin disables writes to upper 1K-bit memory segment - prevents accidental corruption of critical calibration data |
| Noise-Resilient Interface | Schmitt-trigger inputs + spike suppression filters - maintains I²C communication integrity in high-EMI engine bay environments |
| Low-Power Operation | 3 mA max active current and 18 μA max standby current - extends battery runtime in always-on telematics modules |
| Page Write Efficiency | 16-byte burst writes reduce I²C overhead by 87% vs. byte-by-byte writes for 16-byte parameter sets |
| Green Packaging | Lead-free, halide-free SOIC - satisfies automotive OEM substance restrictions (e.g., ELV, IMDS) |
Applications
| Infotainment System Settings Storage | Body Control Module (BCM) Configuration |
|---|---|
Use Scenario: Storing user preferences (volume, EQ, display brightness) and radio station presets across power cycles in automotive head units. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed via I²C during boot and runtime by MCU firmware. Use Value: Guarantees settings persistence for 100 years at 55°C, eliminating reconfiguration after battery disconnect or long-term storage. | Use Scenario: Holding door lock logic states, window auto-up/down thresholds, and mirror position offsets in BCM firmware. IC Role / Device Role / Timing Role: I²C slave EEPROM providing persistent parameter storage with hardware write protection against firmware update errors. Use Value: WP pin isolates critical safety-related parameters (e.g., anti-pinch limits) from accidental overwrite during OTA updates. |
| Engine Control Unit (ECU) Calibration Data | Advanced Driver Assistance Systems (ADAS) Sensor Trim |
Use Scenario: Retaining fuel injection timing maps, idle air control values, and OBD-II trouble code history in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Automotive-grade serial EEPROM interfaced to ECU's main MCU for field-updatable calibration tables. Use Value: 1,000,000 write cycles support daily recalibration during vehicle testing and dealer service without wear-out risk. | Use Scenario: Storing camera lens distortion coefficients and radar antenna phase trim values in ADAS domain controllers. IC Role / Device Role / Timing Role: Temperature-stable nonvolatile memory accessed during sensor initialization to apply factory-trimmed compensation data. Use Value: −40°C to +125°C operation ensures reliable trim data retrieval during cold-start and high-load thermal conditions. |
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, I²C interface, and SOIC-8 package; rated for industrial temp (−40°C to +85°C), not AEC-Q100 qualified | Lacks automotive qualification - unsuitable for under-hood or safety-critical modules requiring Grade 1 validation | Select only for cost-sensitive non-automotive applications where extended temperature range is unnecessary |
| M95256-DFMN6TP | 256-Kbit SPI EEPROM in SOIC-8; higher density but different interface (SPI vs. I²C), no WP pin, 5.5V max VCC | Requires MCU SPI peripheral and custom driver; no hardware write protection; incompatible with existing I²C firmware stack | Choose only when migrating to SPI architecture and needing >2-Kbit capacity; not drop-in compatible |
Compared with AT24C02D-SSHM-T, the AT24HC02BN-SH-T delivers verified automotive qualification and extended temperature margin; versus M95256-DFMN6TP, it preserves I²C compatibility and hardware write protection at lower density-critical for legacy automotive firmware reuse and functional safety partitioning.
Availability
AT24HC02BN-SH-T is available at Aetrix Electronics and suitable for automotive infotainment systems, body control modules, and engine management units requiring stable component supply with guaranteed AEC-Q100 compliance and long-term production continuity.
Supply support for AT24HC02BN-SH-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/TS 16949-certified automotive manufacturing processes.
The AT24HC02BN-SH-T belongs to Microchip's automotive-qualified serial EEPROM product line, designed specifically for robust, low-power nonvolatile data storage in harsh-temperature automotive subsystems.
FAQ
What is the maximum I²C clock frequency supported by the AT24HC02BN-SH-T?
The AT24HC02BN-SH-T supports I²C Fast mode up to 400 kHz, with AC timing parameters including tLOW ≥ 1200 ns and tHIGH ≥ 600 ns. This allows high-speed configuration reads during system boot while maintaining noise immunity via integrated Schmitt triggers and input filtering-critical for reliable operation in electrically noisy automotive environments. The AT24HC02BN-SH-T does not support High-Speed mode (3.4 MHz).
How does the write-protect (WP) pin function on the AT24HC02BN-SH-T?
When the WP pin of the AT24HC02BN-SH-T is driven high (VCC), writes to the upper half (1K-bit) of memory are inhibited, protecting critical calibration or safety parameters. When WP is low (GND), full memory access is enabled. If left floating, the pin is internally pulled down to GND-however, Microchip recommends hard-wiring WP to a defined state to prevent capacitive coupling-induced glitches in automotive applications.
Is the AT24HC02BN-SH-T pin-compatible with other Microchip 2-Kbit I²C EEPROMs like the AT24C02?
Yes, the AT24HC02BN-SH-T shares identical 8-lead SOIC pinout, device addressing (1010A2A1R/W), and I²C protocol with AT24C02 variants. However, the AT24HC02BN-SH-T adds AEC-Q100 Grade 1 qualification, extended temperature range (−40°C to +125°C), and tighter DC/AC specs-making it a direct replacement where automotive reliability is required, without PCB layout changes.
What is the typical write cycle time for the AT24HC02BN-SH-T during page write operations?
The AT24HC02BN-SH-T completes internal write cycles in ≤5 ms, regardless of byte or page write mode. During this time, the device does not acknowledge I²C commands and SDA remains high. Host firmware must implement acknowledge polling or fixed-delay waits before initiating subsequent operations-ensuring data integrity in safety-critical automotive logging applications where the AT24HC02BN-SH-T is deployed.
Does the AT24HC02BN-SH-T require external pull-up resistors on SDA and SCL lines?
Yes, the AT24HC02BN-SH-T requires external pull-up resistors on both SDA and SCL lines due to its open-drain I/O architecture. For 400 kHz Fast mode operation, Microchip specifies a 1.3 kΩ pull-up to VCC on SDA; SCL may be driven actively or pulled up similarly. These resistors ensure proper signal rise times (tR ≤ 300 ns) and bus arbitration-essential for deterministic timing in real-time automotive networks using the AT24HC02BN-SH-T.
AT24HC02BN-SH-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:
- 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-T FAQ
1.How can I place an order for AT24HC02BN-SH-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24HC02BN-SH-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 AT24HC02BN-SH-T reliable?
The price and inventory of AT24HC02BN-SH-T 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-T is usually 5 days.
3.What payment methods are accepted for AT24HC02BN-SH-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24HC02BN-SH-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24HC02BN-SH-T?
AT24HC02BN-SH-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24HC02BN-SH-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 AT24HC02BN-SH-T?
For technical support, including AT24HC02BN-SH-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24HC02BN-SH-T requirements.
6.How does Aetrix verify that AT24HC02BN-SH-T is sourced from the original manufacturer or authorized distributors?
All AT24HC02BN-SH-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 AT24HC02BN-SH-T meets industry standards.
7.What is the process for return or replacement of AT24HC02BN-SH-T?
All AT24HC02BN-SH-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24HC02BN-SH-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 AT24HC02BN-SH-T part is unused and in its original packaging.
Return procedure for AT24HC02BN-SH-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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