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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Microchip Technology AT24C08C-SSPD-T

Name: AT24C08C-SSPD-T
Brand: Microchip Technology
SKU: AT24C08C-SSPD-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AT24C08C-SSPD-T

Manufacturer:: Microchip Technology

Category:: Memory

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: AT24C08C-SSPD-T.pdf

Description:: IC EEPROM 8KBIT I2C 1MHZ 8SOIC

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Product details

Overview

AT24C08C-SSPD-T from Microchip Technology (formerly Atmel) is an automotive-grade 8K-bit I²C serial EEPROM organized as 1,024 words × 8 bits, housed in an 8-lead JEDEC SOIC package. It operates from 2.5V to 5.5V over –40°C to +125°C (Grade 1), supports 400kHz I²C communication, features hardware write protection via the WP pin, and delivers 1,000,000 write cycles with 100-year data retention - deployed in engine control units, ADAS sensor calibration storage, and infotainment configuration memory.

For engineers reviewing the AT24C08C-SSPD-T datasheet, AT24C08C-SSPD-T pinout, AT24C08C-SSPD-T application, or AT24C08C-SSPD-T equivalent, key selection criteria include Grade 1 automotive qualification, 16-byte page write capability, Schmitt-triggered noise-immune inputs, self-timed 5ms max write cycle, and compatibility with standard 2-wire I²C host controllers in safety-critical embedded systems.

Technical Context

The AT24C08C-SSPD-T implements a true 2-wire I²C interface with bidirectional open-drain SDA and edge-triggered SCL, supporting standard-mode (100kHz) and fast-mode (400kHz) operation. Its internal architecture includes a 64-page × 16-byte memory array, 10-bit word addressing, and hardware-based write protection that disables all writes when WP = VCC.

It integrates Schmitt-trigger inputs for robust noise immunity, supports partial and full-page writes, and uses an internal high-voltage pump for EEPROM programming. The device enters low-power standby mode after Stop conditions and supports software reset via 9-clock dummy cycles - critical for deterministic recovery in automotive power-loss scenarios.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	8,192 bits (1,024 × 8-bit words) - sufficient for storing ECU calibration maps, VIN, and firmware version metadata.
Interface	I²C-compatible 2-wire serial bus - interoperable with ARM Cortex-M, Renesas RH850, and Infineon AURIX microcontrollers without protocol translation.
Operating Voltage	2.5V to 5.5V (Grade 1) - matches automotive battery rail fluctuations and eliminates need for external voltage regulation in 12V systems.
Temperature Range	–40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood and transmission control module deployment.
Write Cycle Time	≤5 ms (self-timed) - enables deterministic firmware update sequencing without polling overhead in real-time OS environments.
Endurance & Retention	1,000,000 write cycles / 100-year data retention - meets ASAM MCD-2 MC requirements for long-life vehicle service intervals.
Page Write Size	16 bytes per page - optimizes write efficiency for CAN message log buffers and sensor offset tables.

Pinout & Package

AT24C08C-SSPD-T uses an 8-lead JEDEC SOIC (8S1) package: 0.150" wide body, 1.27 mm pitch, gull-wing leads, RoHS-compliant NiPdAu finish.

Pin/Terminal	Circuit Role	Design Meaning
A0	Device Address Input	No-connect for AT24C08C; unused in hardware addressing - must be tied to GND or VCC per board layout, not left floating.
A1	Device Address Input	No-connect for AT24C08C; unused in hardware addressing - must be tied to GND or VCC per board layout, not left floating.
A2	Device Address Input	Hardwired address bit enabling up to two AT24C08C devices on one I²C bus (A2 = 0 or 1).
GND	Ground Reference	System ground return path for all internal logic and EEPROM charge pump operations.
VCC	Power Supply	Primary supply input (2.5–5.5V); powers internal logic, I/O buffers, and high-voltage programming circuitry.
WP	Write Protect Control	Active-high hardware lock: WP = VCC disables all write/erase operations, preventing accidental corruption during power transients.
SCL	Serial Clock Input	Positive-edge clock for data-in; negative-edge clock for data-out - synchronizes all I²C transactions with host controller timing.
SDA	Serial Data I/O	Open-drain bidirectional line shared across multiple I²C devices; requires external pull-up resistor (typically 2.2kΩ to VCC).

Key Features

Feature	Design Value
Automotive Grade 1 Qualification	Validated per AEC-Q100 Rev G for operation from –40°C to +125°C - suitable for powertrain and chassis control modules without derating.
16-byte Page Write Capability	Reduces I²C transaction count by 16× vs. byte-write for bulk configuration updates - lowers bus arbitration latency in multi-master systems.
Schmitt Trigger Inputs	Suppresses noise-induced glitches on SCL/SDA lines in electrically noisy engine compartments - eliminates spurious Start/Stop detection.
Hardware Write Protection (WP)	Prevents firmware corruption during brown-out or reset events without requiring software intervention - enhances functional safety compliance (ISO 26262 ASIL-B).
Self-timed Write Cycle	Internal timing eliminates need for host-controller wait states or status polling - simplifies RTOS task scheduling and reduces CPU utilization.

Applications

Engine Control Unit (ECU) Calibration Storage	Advanced Driver Assistance Systems (ADAS) Sensor Offset Memory
Use Scenario: Storing fuel injection timing maps, spark advance curves, and OBD-II diagnostic fault codes that persist across ignition cycles and battery disconnects. IC Role / Device Role / Timing Role: Nonvolatile configuration register bank accessed via I²C during boot and runtime reconfiguration - retains values during 12V rail collapse. Use Value: Enables zero-latency recall of calibrated parameters after cold start, meeting ISO 15765-2 boot-time requirements (<500ms).	Use Scenario: Holding camera/lidar sensor alignment offsets and thermal drift compensation coefficients updated during factory calibration and periodic field recalibration. IC Role / Device Role / Timing Role: Dedicated parameter store isolated from main MCU flash - prevents corruption during OTA firmware updates or sensor firmware reloads. Use Value: Ensures ADAS feature availability immediately post-boot without waiting for sensor warm-up or recalibration handshake.
Infotainment System Configuration Memory	Transmission Control Module (TCM) Gear Strategy Tables
Use Scenario: Saving user preferences (volume, display brightness, Bluetooth pairing), regional settings, and audio equalizer profiles across power cycles. IC Role / Device Role / Timing Role: Low-power serial EEPROM interfaced directly to application processor's I²C controller - accessible during suspend/resume transitions. Use Value: Maintains personalized UX state without consuming DRAM retention power or relying on volatile backup capacitors.	Use Scenario: Storing adaptive shift-point tables, torque converter lock-up schedules, and clutch wear compensation values learned over vehicle lifetime. IC Role / Device Role / Timing Role: Mission-critical nonvolatile storage co-located with TCM MCU - written only during safe coasting conditions to avoid interrupting gear shifts. Use Value: Enables progressive transmission adaptation while guaranteeing integrity of learned behavior across 15+ year vehicle lifespan.

Engine Control Unit (ECU) Calibration Storage

Advanced Driver Assistance Systems (ADAS) Sensor Offset Memory

Use Scenario: Storing fuel injection timing maps, spark advance curves, and OBD-II diagnostic fault codes that persist across ignition cycles and battery disconnects.

IC Role / Device Role / Timing Role: Nonvolatile configuration register bank accessed via I²C during boot and runtime reconfiguration - retains values during 12V rail collapse.

Use Value: Enables zero-latency recall of calibrated parameters after cold start, meeting ISO 15765-2 boot-time requirements (<500ms).

Use Scenario: Holding camera/lidar sensor alignment offsets and thermal drift compensation coefficients updated during factory calibration and periodic field recalibration.

IC Role / Device Role / Timing Role: Dedicated parameter store isolated from main MCU flash - prevents corruption during OTA firmware updates or sensor firmware reloads.

Use Value: Ensures ADAS feature availability immediately post-boot without waiting for sensor warm-up or recalibration handshake.

Infotainment System Configuration Memory

Transmission Control Module (TCM) Gear Strategy Tables

Use Scenario: Saving user preferences (volume, display brightness, Bluetooth pairing), regional settings, and audio equalizer profiles across power cycles.

IC Role / Device Role / Timing Role: Low-power serial EEPROM interfaced directly to application processor's I²C controller - accessible during suspend/resume transitions.

Use Value: Maintains personalized UX state without consuming DRAM retention power or relying on volatile backup capacitors.

Use Scenario: Storing adaptive shift-point tables, torque converter lock-up schedules, and clutch wear compensation values learned over vehicle lifetime.

IC Role / Device Role / Timing Role: Mission-critical nonvolatile storage co-located with TCM MCU - written only during safe coasting conditions to avoid interrupting gear shifts.

Use Value: Enables progressive transmission adaptation while guaranteeing integrity of learned behavior across 15+ year vehicle lifespan.

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, 2.5–5.5V, –40°C to +125°C, but uses different device addressing scheme (A0/A1 required) and lacks dedicated WP pin - requires software-controlled write lock.	Not AEC-Q100 qualified; rated for industrial temperature only - unsuitable for under-hood deployment.	Select when cost sensitivity outweighs automotive qualification and hardware write protection is not required.
Rohm BR24G08FJ-3GE2	8K-bit, 1.7–5.5V, –40°C to +105°C (Grade 2), integrated write protect, but slower 100kHz max I²C speed and no Schmitt-trigger inputs.	Grade 2 qualification limits use to cabin-mounted modules (e.g., HVAC controls), not powertrain or ADAS.	Select for cost-sensitive cabin electronics where extended temperature range and noise immunity are secondary.

Compared with M24C08-RMN6TP and BR24G08FJ-3GE2, AT24C08C-SSPD-T uniquely combines AEC-Q100 Grade 1 qualification, hardware WP, Schmitt-trigger noise immunity, and 400kHz I²C speed - making it the only choice for safety-critical, high-noise, high-temperature automotive subsystems.

Availability

AT24C08C-SSPD-T is available at Aetrix Electronics and suitable for engine control units, ADAS sensor calibration systems, and infotainment configuration storage requiring stable component supply across extended automotive production lifecycles.

Supply support for AT24C08C-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 is a global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with deep expertise in automotive and industrial embedded systems.

The AT24C08C-SSPD-T belongs to Microchip's automotive-qualified serial EEPROM product line, designed specifically for reliable nonvolatile data storage in harsh-temperature, high-reliability vehicle subsystems including powertrain, chassis, and driver assistance applications.

FAQ

What is the maximum I²C clock frequency supported by the AT24C08C-SSPD-T?

The AT24C08C-SSPD-T supports up to 400 kHz I²C clock frequency at VCC ≥ 2.5 V, compliant with I²C fast-mode specification. This enables faster configuration loading than standard-mode (100 kHz) devices, reducing boot time in automotive ECUs. The device maintains timing margins across its full –40°C to +125°C operating range, with tLOW ≥ 1200 ns and tHIGH ≥ 600 ns verified per datasheet Table 5-3.

Does the AT24C08C-SSPD-T require external pull-up resistors on SDA and SCL lines?

Yes, the AT24C08C-SSPD-T requires external pull-up resistors on both SDA and SCL lines because its I/O pins are open-drain. Typical values are 2.2 kΩ to VCC for 400 kHz operation with ≤100 pF bus capacitance. The device's internal Schmitt triggers ensure clean signal transitions even with slow-rising edges caused by higher-value resistors or longer traces - critical for noise resilience in automotive harness environments.

How many AT24C08C-SSPD-T devices can share the same I²C bus?

Up to two AT24C08C-SSPD-T devices can share a single I²C bus, enabled by the A2 address pin. With A2 hardwired to GND on one device and VCC on the other, their 7-bit device addresses become 0x50 and 0x51 respectively. A0 and A1 are no-connect for AT24C08C per datasheet Section 4, so only A2 provides address differentiation - unlike smaller-density variants (e.g., AT24C02C) which use A2/A1/A0 for up to eight devices.

What happens to the AT24C08C-SSPD-T during a power brown-out event?

During a power brown-out, the AT24C08C-SSPD-T's internal power-on reset (POR) circuit holds the device in reset until VCC rises above ~2.3 V and stabilizes for ≥100 μs. This prevents partial writes and invalid command execution. If WP is tied to VCC, write protection remains active throughout the brown-out, safeguarding stored data. The device resumes normal I²C operation only after valid VCC and a Start condition - ensuring deterministic recovery in automotive stop-start systems.

Is the AT24C08C-SSPD-T pin-compatible with other members of the AT24CxxC family?

Yes, the AT24C08C-SSPD-T shares identical pinout, package (8S1 SOIC), and I²C interface with AT24C01C-SSPD-T, AT24C02C-SSPD-T, and AT24C04C-SSPD-T. However, address pin usage differs: AT24C08C uses only A2 (A0/A1 NC), while AT24C04C uses A2/A1 (A0 NC) and AT24C02C uses A2/A1/A0. Software must account for differing memory depth (1K–8K) and page size (8–16 bytes) - but PCB layout and schematic symbols remain reusable across the family.

AT24C08C-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:: 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:: 8-SOIC

AT24C08C-SSPD-T FAQ

1.How can I place an order for AT24C08C-SSPD-T through Aetrix?

Please submit a Request for Quotation (RFQ) for AT24C08C-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 AT24C08C-SSPD-T reliable?

The price and inventory of AT24C08C-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 AT24C08C-SSPD-T is usually 5 days.

3.What payment methods are accepted for AT24C08C-SSPD-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C08C-SSPD-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AT24C08C-SSPD-T?

AT24C08C-SSPD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AT24C08C-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 AT24C08C-SSPD-T?

For technical support, including AT24C08C-SSPD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C08C-SSPD-T requirements.

6.How does Aetrix verify that AT24C08C-SSPD-T is sourced from the original manufacturer or authorized distributors?

All AT24C08C-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 AT24C08C-SSPD-T meets industry standards.

7.What is the process for return or replacement of AT24C08C-SSPD-T?

All AT24C08C-SSPD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C08C-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 AT24C08C-SSPD-T part is unused and in its original packaging.

Return procedure for AT24C08C-SSPD-T:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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