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Microchip Technology AT24C08C-STPD-TVAO
- Part No.:
- AT24C08C-STPD-TVAO
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
AT24C08C-STPD-TVAO.pdf
- Description:
- IC EEPROM 8KBIT I2C TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,205
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Product details
Overview
AT24C08C-STPD-TVAO from Microchip Technology (formerly Atmel) is an automotive-grade 8K-bit (1,024 × 8) serial EEPROM with I²C-compatible 2-wire interface, 1.7V–5.5V operation, -40°C to +125°C Grade 1 temperature range, and 16-byte page write capability. It serves as nonvolatile configuration storage in engine control units, ADAS sensor modules, and body electronics where data integrity and AEC-Q100 compliance are critical.
For engineers reviewing the AT24C08C-STPD-TVAO datasheet, AT24C08C-STPD-TVAO pinout, AT24C08C-STPD-TVAO application, or AT24C08C-STPD-TVAO equivalent, key selection criteria include Grade 1 automotive qualification, hardware write protection via WP pin, 400kHz I²C timing at 2.5V, self-timed 5ms max write cycle, and JEDEC SOIC-8 packaging with NiPdAu lead finish.
Technical Context
The AT24C08C-STPD-TVAO implements a dedicated I²C slave interface with Schmitt-triggered SCL/SDA inputs for noise immunity, supports bidirectional data transfer with ACK/NACK protocol, and uses internal address counter rollover for sequential reads across memory boundaries. Its architecture includes a high-voltage pump for EEPROM cell programming and integrated timing logic for autonomous write-cycle completion.
Device addressing uses fixed '1010' prefix plus hardwired A2 pin (A0/A1 are no-connect), enabling up to two AT24C08C devices on one bus. Write protection is controlled solely by the WP pin: tied to VCC for full-array lockout, GND for normal read/write access - no software lock required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8,192 bits (1,024 words × 8 bits), organized in 64 pages of 16 bytes each - enables efficient firmware parameter storage with minimal page-boundary management overhead. |
| Supply Voltage Range | 1.7V to 5.5V (Grade 3) or 2.5V to 5.5V (Grade 1); AT24C08C-STPD-TVAO is Grade 1 - supports direct connection to 3.3V or 5V automotive power rails without level shifting. |
| Interface Speed | 400 kHz maximum clock frequency at 2.5V - compatible with standard I²C fast-mode controllers in microcontrollers like PIC18F, S32K, or RH850 without timing margin concerns. |
| Write Cycle Time | 5 ms maximum self-timed write - eliminates need for polling delay in host firmware; ACK polling can be used to detect completion asynchronously. |
| Data Retention | 100 years at +25°C - ensures long-term calibration data persistence over vehicle lifetime without refresh cycles. |
| Endurance | 1,000,000 write cycles per memory location - sufficient for frequent logging or adaptive learning applications such as battery SOC tracking or seat position memory. |
| Operating Temperature | -40°C to +125°C (AEC-Q100 Grade 1) - qualified for under-hood and transmission-control module environments with thermal cycling stress. |
Pinout & Package
AT24C08C-STPD-TVAO is supplied in an 8-lead JEDEC SOIC package (package code "SS", drawing 8S1), 0.150" wide body, NiPdAu lead finish, tape-and-reel delivery (T). Dimensions comply with MS-012AA; footprint matches industry-standard SOIC-8 footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Address Input | No-connect for AT24C08C - must be left floating or tied to GND/VCC; not used in device addressing. |
| A1 | Address Input | No-connect for AT24C08C - unused; does not affect I²C address decoding. |
| A2 | Device Address Bit | Hardwired input determining LSB of 3-bit device address ('1010 A2 P1 P0 R/W'); selects one of two possible AT24C08C addresses on shared bus. |
| GND | Ground Reference | Primary return path for VCC and all I/O; requires low-impedance PCB connection to minimize noise coupling into SDA/SCL. |
| VCC | Power Supply | Single supply input (1.7–5.5V); internal POR circuit ensures reliable initialization during cold-cranking or battery dip events. |
| WP | Write Protect Control | Active-high hardware lock: tied to VCC disables all writes to entire array; tied to GND enables full read/write access - no firmware dependency. |
| SCL | Serial Clock Input | Open-drain input with Schmitt trigger; requires external pull-up; defines timing for data sampling on SDA edge transitions. |
| SDA | Serial Data I/O | Open-drain bidirectional line; shares bus with other I²C devices; ACK/NACK signaling occurs on 9th clock cycle after byte transmission. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive Grade 1 Qualification | AEC-Q100 Rev G compliant for -40°C to +125°C operation - validated for engine bay, transmission, and safety-critical ECUs without derating. |
| Hardware Write Protection | WP pin directly gates write enable logic - prevents accidental overwrites during power transients or firmware faults without software intervention. |
| 16-byte Page Write Mode | Allows burst programming of up to 16 bytes per transaction - reduces I²C bus occupancy vs. byte-write, improving system responsiveness in real-time applications. |
| Noise-Suppressed Inputs | Schmitt-triggered SCL/SDA with 50 ns noise filter - rejects EMI spikes common in 12V automotive harnesses without external RC filtering. |
| Low Standby Current | Max 6.0 µA at 5.0V - minimizes quiescent drain on always-on vehicle batteries in sleep modes (e.g., key-off monitoring). |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Storing adaptive fuel trim values, misfire counters, and OBD-II diagnostic trouble codes (DTCs) that persist across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration and event-log storage with guaranteed retention over 15+ years and 1M+ write cycles. Use Value: Enables regulatory-compliant emissions diagnostics and long-term engine health monitoring without external backup power or FRAM cost premium. | Use Scenario: Saving camera calibration offsets, radar fusion parameters, and lane-departure warning thresholds in forward-facing sensor modules. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter storage accessible via I²C during boot and runtime - WP pin prevents corruption during CAN/LIN bus fault conditions. Use Value: Maintains sensor accuracy across vehicle lifetime and thermal cycles, meeting ISO 26262 ASIL-B functional safety requirements for data integrity. |
| Body Control Module (BCM) | Electric Power Steering (EPS) |
Use Scenario: Retaining user preferences (mirror position, seat memory, lighting profiles) and door/window auto-reverse settings after battery disconnect. IC Role / Device Role / Timing Role: Low-voltage (1.7V) operation ensures reliable write capability during cranking when battery dips below 6V. Use Value: Delivers seamless personalization experience without requiring supercapacitor hold-up or complex power-fail detection circuitry. | Use Scenario: Logging motor phase current history, torque sensor zero-point drift compensation, and steering angle offset corrections for closed-loop control tuning. IC Role / Device Role / Timing Role: High-endurance storage for time-series data sampled at 1kHz+ - leverages 1M write cycles to support daily recalibration over 10+ year service life. Use Value: Extends EPS system reliability and reduces warranty claims related to steering feel degradation or unintended assist behavior. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics M24C08-RMN6TP | Same 8K-bit density, I²C interface, SOIC-8 package; AEC-Q100 Grade 2 (-40°C to +105°C); 1.7–5.5V; no WP pin - write protection only via software lock bits. | Limited to cabin modules (infotainment, HVAC) due to lower max temperature; unsuitable for under-hood use. | Select if Grade 2 suffices and WP pin is not required; verify software-based protection meets system security requirements. |
| Rohm BR24G08FJ-WE2 | 8K-bit, I²C, TSSOP-8; AEC-Q100 Grade 1; 1.7–5.5V; built-in WP pin; supports 1 MHz Fast-mode Plus at 2.5V - higher speed than AT24C08C-STPD-TVAO. | Requires PCB layout change (TSSOP vs SOIC); faster timing may demand stricter signal integrity controls on long traces. | Choose for higher throughput needs (e.g., OTA update parameter staging); confirm TSSOP footprint compatibility and thermal pad grounding. |
Compared with M24C08-RMN6TP and BR24G08FJ-WE2, AT24C08C-STPD-TVAO provides the strictest automotive qualification (Grade 1 at 125°C), proven SOIC-8 mechanical reliability in vibration-prone environments, and hardware-level WP pin assurance - making it optimal for mission-critical powertrain and chassis systems where failure modes must be minimized.
Availability
AT24C08C-STPD-TVAO is available at Aetrix Electronics and suitable for engine control units, ADAS sensor modules, and body control modules requiring stable component supply across extended automotive product lifecycles.
Supply support for AT24C08C-STPD-TVAO 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 global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with deep expertise in automotive and industrial embedded systems.
The AT24CxxC family was designed specifically for automotive applications demanding AEC-Q100 qualification, extended temperature operation, and robust I²C communication - targeting ECU, telematics, and safety-critical subsystems where data persistence and reliability are non-negotiable.
FAQ
What is the operating voltage range for AT24C08C-STPD-TVAO?
The AT24C08C-STPD-TVAO operates from 2.5V to 5.5V (Grade 1 specification), supporting direct integration with common automotive 3.3V and 5V domains. It is not rated for 1.7V operation - that range applies only to Grade 3 variants (e.g., AT24C08C-SS9M-T). Always verify voltage grade from the suffix: 'D' = 2.5V min, 'M' = 1.7V min.
Does AT24C08C-STPD-TVAO support I²C fast-mode (400 kHz) at all supply voltages?
AT24C08C-STPD-TVAO guarantees 400 kHz operation at VCC = 2.5V, as specified in the AC characteristics table. At 5.5V, timing margins improve but the maximum rated frequency remains 400 kHz. It does not support Fast-mode Plus (1 MHz); for higher speeds, consider alternatives like Rohm BR24G08FJ-WE2.
How many AT24C08C-STPD-TVAO devices can share the same I²C bus?
Up to two AT24C08C-STPD-TVAO devices can coexist on one I²C bus. The device address uses fixed '1010' prefix plus the A2 pin state (0 or 1) as the LSB, yielding addresses 0xA0 and 0xA2. A0 and A1 pins are no-connect and must not be used for addressing - unlike smaller-density variants in the same family.
What is the function of the WP pin on AT24C08C-STPD-TVAO?
The WP (Write Protect) pin on AT24C08C-STPD-TVAO is a hardware-enforced lock: when pulled high to VCC, it disables all write operations to the entire memory array; when grounded, full read/write access is enabled. This provides fail-safe protection against corruption during power brownouts or firmware crashes - independent of software state.
Is AT24C08C-STPD-TVAO pin-compatible with other AT24CxxC variants in SOIC-8 package?
Yes, AT24C08C-STPD-TVAO shares identical SOIC-8 pinout and electrical interface with AT24C01C-STPD-T, AT24C02C-STPD-T, and AT24C04C-STPD-T. However, addressing differs: AT24C08C uses only A2 (A0/A1 NC), while AT24C04C uses A2/A1 (A0 NC), and AT24C02C uses A2/A1/A0 - so firmware must match the correct device address scheme.
AT24C08C-STPD-TVAO Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 8Kbit
- Memory Organization:
- 1K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
AT24C08C-STPD-TVAO FAQ
1.How can I place an order for AT24C08C-STPD-TVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C08C-STPD-TVAO 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 AT24C08C-STPD-TVAO reliable?
The price and inventory of AT24C08C-STPD-TVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C08C-STPD-TVAO is usually 5 days.
3.What payment methods are accepted for AT24C08C-STPD-TVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C08C-STPD-TVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C08C-STPD-TVAO?
AT24C08C-STPD-TVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C08C-STPD-TVAO 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 AT24C08C-STPD-TVAO?
For technical support, including AT24C08C-STPD-TVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C08C-STPD-TVAO requirements.
6.How does Aetrix verify that AT24C08C-STPD-TVAO is sourced from the original manufacturer or authorized distributors?
All AT24C08C-STPD-TVAO 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 AT24C08C-STPD-TVAO meets industry standards.
7.What is the process for return or replacement of AT24C08C-STPD-TVAO?
All AT24C08C-STPD-TVAO units undergo pre-shipment inspection (PSI). If there is an issue with AT24C08C-STPD-TVAO, 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 AT24C08C-STPD-TVAO part is unused and in its original packaging.
Return procedure for AT24C08C-STPD-TVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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