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Microchip Technology AT24C16C-SSPD-T
- Part No.:
- AT24C16C-SSPD-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C16C-SSPD-T.pdf
- Description:
- IC EEPROM 16KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,984
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Product details
Overview
AT24C16C-SSPD-T from Microchip Technology (formerly Atmel) is an automotive-grade 16-Kbit I²C serial EEPROM organized as 2,048 × 8 bits, operating from 2.5V to 5.5V over –40°C to +125°C (Grade 1), featuring hardware write protection via WP pin, 400kHz interface speed, and 16-byte page write capability. It serves as nonvolatile parameter storage in engine control units, ADAS sensor modules, and infotainment system configuration memory.
For engineers reviewing the AT24C16C-SSPD-T datasheet, AT24C16C-SSPD-T pinout, AT24C16C-SSPD-T application, or AT24C16C-SSPD-T equivalent, key selection criteria include Grade 1 automotive qualification, JEDEC SOIC-8 package compatibility, I²C address flexibility (fixed 1010xxxR/W), and endurance-critical use in firmware update logging and calibration data retention.
Technical Context
The AT24C16C-SSPD-T implements a standard two-wire I²C interface with Schmitt-triggered, noise-filtered SDA and SCL inputs, supporting both byte and 16-byte page writes with self-timed internal write cycles (≤5ms). Its memory architecture uses 128 pages of 16 bytes each, with address auto-increment during sequential reads and wraparound at page boundaries.
Device addressing follows the I²C protocol with a fixed 4-bit prefix (1010), three programmable page bits (P2–P0), and R/W bit - though A0–A2 pins are NC on this variant, limiting bus topology to one device per I²C segment. Write protection is implemented via dedicated WP pin tied to VCC for full-array lock or GND for normal operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2,048 × 8 bits), enabling storage of up to 2 KB of persistent configuration or calibration data |
| Interface | I²C-compatible 2-wire serial bus, compatible with standard microcontroller I²C peripherals without protocol translation |
| Supply Voltage | 2.5V to 5.5V (Grade 1), supporting direct connection to 3.3V or 5V automotive power rails |
| Temperature Range | –40°C to +125°C, qualified per AEC-Q100 Grade 1 for under-hood and powertrain applications |
| Write Endurance | 1,000,000 cycles, sufficient for daily firmware log updates over 10+ years of vehicle service life |
| Data Retention | 100 years at +25°C, ensuring long-term integrity of safety-critical calibration parameters |
| Write Cycle Time | ≤5 ms max self-timed write, allowing deterministic timing budgeting in real-time control loops |
Pinout & Package
AT24C16C-SSPD-T is housed in an 8-lead JEDEC SOIC package (8S1), 0.150" wide, with gull-wing leads and NiPdAu lead finish. Pin 1 is marked by a notch or beveled corner; the package is RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | No Connect (NC) | Unused device address pins - not bonded internally; must be left unconnected or grounded per layout best practice |
| 4 | GND | Ground reference for all internal circuitry and I/O; requires low-impedance connection to system ground plane |
| 5 | VCC | Power supply input (2.5V–5.5V); decoupling capacitor (0.1 µF ceramic) required within 5 mm |
| 6 | WP | Hardware write protect input; logic high (VCC) locks entire 16K array against accidental writes |
| 7 | SCL | Serial clock input; open-drain compatible, requires external pull-up resistor (typically 2.2–10 kΩ) |
| 8 | SDA | Bi-directional serial data I/O; open-drain, shared across multiple I²C devices with single pull-up |
Key Features
| Feature | Design Value |
|---|---|
| Automotive Grade 1 Qualification | Validated per AEC-Q100 Rev G for operation from –40°C to +125°C, enabling use in ECU, transmission, and battery management systems |
| Hardware Write Protection | WP pin enables fail-safe locking of EEPROM contents during power-up or fault conditions, preventing corruption during brown-out events |
| 16-byte Page Write Mode | Reduces I²C transaction overhead by up to 15× versus byte writes, improving firmware update throughput in telematics modules |
| Schmitt Trigger Inputs | Suppresses noise-induced false clock/data transitions on SCL/SDA lines in electrically noisy automotive environments |
| Low Standby Current | ≤4.0 µA at 5.0V, minimizing quiescent power draw in always-on vehicle networks like LIN gateway nodes |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Storing adaptive fuel trim values, misfire counters, and diagnostic trouble code (DTC) history across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration register providing persistent memory between MCU resets and power loss. Use Value: Enables compliance with OBD-II emission standards by retaining calibrated parameters through 10+ years of thermal cycling and vibration. | Use Scenario: Saving camera calibration offsets, radar sensor alignment data, and lane-departure warning thresholds after factory setup or field recalibration. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for safety-critical sensor metadata used during boot-time initialization. Use Value: Guarantees functional safety (ISO 26262 ASIL-B support) via write-protection and 1M-cycle endurance for recalibration events. |
| Infotainment Head Unit | Electric Vehicle Battery Management System (BMS) |
Use Scenario: Retaining user preferences (volume, display brightness, Bluetooth pairing), firmware version stamps, and audio equalizer settings. IC Role / Device Role / Timing Role: Low-power serial memory interfacing directly with application processor's I²C controller. Use Value: Eliminates need for external backup capacitors or supercapacitors due to fast 5ms writes and <4µA standby current. | Use Scenario: Logging cell voltage imbalance history, thermal runaway event timestamps, and SOC/SOH calibration coefficients across charge/discharge cycles. IC Role / Device Role / Timing Role: High-reliability data logger synchronized to BMS microcontroller's periodic sampling routine. Use Value: Supports 100-year data retention at elevated temperatures, meeting OEM requirements for 15-year vehicle lifecycle traceability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95128-DFMN6TP | 128-Kbit SPI interface, 2.5–5.5V, same Grade 1 temp range but different protocol and pinout | Requires SPI-capable MCU; unsuitable for I²C-only designs; higher density but no WP pin | Select only if migrating from I²C to SPI architecture and board layout allows footprint change |
| BR24G16NUX-5TR | 16-Kbit I²C EEPROM, 1.7–5.5V, –40°C to +105°C (Grade 2), same SOIC-8 package and pinout | Limited to Grade 2 temperature range; lacks AEC-Q100 Grade 1 certification for powertrain use | Acceptable for cabin electronics or body control modules where 125°C operation is not required |
Compared with M95128-DFMN6TP and BR24G16NUX-5TR, AT24C16C-SSPD-T uniquely combines AEC-Q100 Grade 1 qualification, I²C compatibility, hardware write protection, and JEDEC SOIC-8 footprint - making it the only drop-in solution for safety-critical automotive applications requiring full temperature coverage and protocol consistency.
Availability
AT24C16C-SSPD-T is available at Aetrix Electronics and suitable for engine control units, ADAS sensor modules, and infotainment head units requiring stable component supply across extended vehicle production lifecycles.
Supply support for AT24C16C-SSPD-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 acquired Atmel in 2016 and maintains its automotive EEPROM portfolio with full backward compatibility, quality assurance, and long-term product support.
The AT24C16C series was designed specifically for automotive subsystems demanding high reliability, extended temperature operation, and robust noise immunity in harsh electrical environments.
FAQ
What is the operating voltage range for AT24C16C-SSPD-T?
AT24C16C-SSPD-T operates from 2.5V to 5.5V, compliant with Grade 1 automotive specifications. This range supports direct integration with common 3.3V and 5V microcontroller I/O domains without level-shifting circuitry. The device's internal regulation ensures stable EEPROM access across the full voltage window, including cold-cranking scenarios down to 2.5V.
Does AT24C16C-SSPD-T support I²C multi-master bus configurations?
Yes, AT24C16C-SSPD-T supports multi-master I²C buses via its open-drain SDA and SCL pins with built-in arbitration and clock synchronization. Its Schmitt-trigger inputs and noise filtering ensure reliable communication in electrically noisy automotive environments where multiple masters (e.g., MCU, PMIC, sensor hub) share the same bus.
How does the Write Protect (WP) pin function on AT24C16C-SSPD-T?
The WP pin on AT24C16C-SSPD-T provides hardware-level write protection: when pulled high to VCC, it locks the entire 16K array against write operations; when grounded, normal read/write access is enabled. If left floating, internal circuitry pulls it low (<3pF coupling), defaulting to unprotected mode - so intentional grounding is recommended for safety-critical designs.
What is the maximum I²C clock frequency supported by AT24C16C-SSPD-T?
AT24C16C-SSPD-T supports up to 400kHz I²C clock frequency (Fast Mode), validated across its full operating temperature and voltage range. This enables efficient data transfer rates of ~400 kbit/s, sufficient for rapid calibration updates or firmware patch loading in modern automotive ECUs without requiring high-speed I²C controllers.
Is AT24C16C-SSPD-T qualified to AEC-Q100 standards?
Yes, AT24C16C-SSPD-T is qualified to AEC-Q100 Grade 1 standards, with testing covering temperature cycling, humidity bias, ESD, and mechanical shock. Its qualification confirms suitability for powertrain, chassis, and safety-related automotive applications operating continuously from –40°C to +125°C.
AT24C16C-SSPD-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:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 16Kbit
- Memory Organization:
- 2K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 550 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:
- 8-SOIC
AT24C16C-SSPD-T FAQ
1.How can I place an order for AT24C16C-SSPD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C16C-SSPD-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 AT24C16C-SSPD-T reliable?
The price and inventory of AT24C16C-SSPD-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C16C-SSPD-T is usually 5 days.
3.What payment methods are accepted for AT24C16C-SSPD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C16C-SSPD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C16C-SSPD-T?
AT24C16C-SSPD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C16C-SSPD-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 AT24C16C-SSPD-T?
For technical support, including AT24C16C-SSPD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C16C-SSPD-T requirements.
6.How does Aetrix verify that AT24C16C-SSPD-T is sourced from the original manufacturer or authorized distributors?
All AT24C16C-SSPD-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 AT24C16C-SSPD-T meets industry standards.
7.What is the process for return or replacement of AT24C16C-SSPD-T?
All AT24C16C-SSPD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C16C-SSPD-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 AT24C16C-SSPD-T part is unused and in its original packaging.
Return procedure for AT24C16C-SSPD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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