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Microchip Technology AT24C08D-SSHM-T
- Part No.:
- AT24C08D-SSHM-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C08D-SSHM-T.pdf
- Description:
- IC EEPROM 8KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:10,680
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Product details
Overview
AT24C08D-SSHM-T from Microchip Technology is an I²C-compatible 8-Kbit serial EEPROM organized as 1,024 × 8 bits, operating from 1.7V to 3.6V across -40°C to +85°C industrial temperature range. It supports Standard (100 kHz), Fast (400 kHz), and Fast Mode Plus (1 MHz) I²C speeds, features hardware write protection via WP pin, and delivers ultra-low standby current (0.8 μA max) for battery-backed memory retention in embedded control systems.
For engineers reviewing the AT24C08D-SSHM-T datasheet, AT24C08D-SSHM-T pinout, AT24C08D-SSHM-T application, or AT24C08D-SSHM-T equivalent, key selection criteria include I²C bus voltage compatibility (1.7–3.6 V), page-write capability (16-byte pages), write endurance (1M cycles), data retention (100 years), and SOIC-8 package mechanical fit with exposed pad grounding option.
Technical Context
The AT24C08D-SSHM-T operates as a slave device on a two-wire I²C bus, using SCL for clock synchronization and open-drain SDA for bidirectional data transfer with Schmitt-triggered, noise-filtered inputs. Its internal address comparator validates 7-bit device addresses (1010xxx) with A2 pin enabling dual-device addressing on one bus.
Memory is organized into 64 pages of 16 bytes each, supporting byte-write, page-write (with partial-page capability), random read, and sequential read modes. Write operations are self-timed with ≤5 ms maximum cycle time and protected by hardware WP pin logic that disables all writes when pulled high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1,024 × 8 bits) - sufficient for firmware configuration storage, calibration data, or device identity parameters in compact embedded nodes. |
| Supply Voltage | 1.7 V to 3.6 V - enables direct interface with 1.8 V and 3.3 V microcontrollers without level-shifting. |
| I²C Speed Modes | 100 kHz / 400 kHz / 1 MHz - supports legacy, standard, and high-speed I²C masters; FM+ mode requires ≥2.5 V supply. |
| Write Endurance | 1,000,000 cycles - ensures reliable logging or parameter update in field-deployed industrial sensors or metering devices. |
| Data Retention | 100 years at 55°C - guarantees long-term nonvolatile storage integrity without refresh in sealed or inaccessible installations. |
| Standby Current | 0.8 μA max at 3.6 V - minimizes battery drain in always-on IoT edge nodes powered by coin cells or energy harvesters. |
| Operating Temp | -40°C to +85°C - qualified for use in automotive cabin modules, industrial PLC I/O cards, and outdoor telemetry units. |
Pinout & Package
AT24C08D-SSHM-T is supplied in an 8-lead SOIC package (SOIC-8, 150 mil width) with exposed thermal pad. The pad may be connected to GND for improved thermal performance or left floating per design requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A2 | Device Address Input | Hardwired to GND or VCC to select one of two possible I²C addresses (10100xx or 10101xx); internally pulled down if floating. |
| GND | Ground Reference | System ground connection; required for stable operation and noise immunity; connects to exposed pad in SOIC-8 variant. |
| SDA | Serial Data I/O | Open-drain bidirectional line; requires external pull-up resistor (≤10 kΩ); shared across multiple I²C slaves on same bus. |
| SCL | Serial Clock Input | Master-generated clock input; rising edge latches input data, falling edge outputs data; must be pulled high when idle. |
| WP | Write-Protect Control | Active-high hardware lock: tied to VCC disables all write operations; tied to GND enables full array writes. |
| VCC | Power Supply | 1.7–3.6 V core supply; must ramp monotonically at ≤0.1 V/µs during power-up to ensure proper POR behavior. |
Key Features
| Feature | Design Value |
|---|---|
| Fast Mode Plus Support | 1 MHz I²C operation at 2.5–3.6 V enables faster configuration loading in time-critical boot sequences. |
| 16-Byte Page Write | Allows burst programming of up to 16 bytes per write cycle, reducing total I²C transaction overhead by ~85% vs. byte-wise writes. |
| Schmitt Trigger Inputs | Filters noise on SCL/SDA lines, improving robustness in electrically noisy environments like motor drives or power supplies. |
| Hardware Write Protection | WP pin provides fail-safe, non-software-dependent memory locking-critical for preventing accidental firmware corruption during field updates. |
| Green Packaging | Lead-free, halide-free, RoHS-compliant SOIC-8 package meets global environmental compliance requirements for industrial and consumer products. |
Applications
| Industrial Sensor Calibration | Smart Meter Configuration Storage |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and temperature compensation tables in pressure or humidity transmitters. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed during power-on initialization and runtime correction routines via I²C. Use Value: Enables field-replaceable sensor modules with persistent calibration data independent of host MCU firmware version. | Use Scenario: Holding tariff schedules, billing registers, and communication protocol settings in electricity/water meters with 10+ year service life. IC Role / Device Role / Timing Role: Secure, low-power configuration memory updated infrequently but requiring guaranteed 100-year data retention. Use Value: Eliminates need for battery-backed SRAM while meeting ANSI C12.1 and IEC 62056 metering standards for data integrity. |
| Embedded System Bootloader Settings | IoT Edge Node Identity Storage |
Use Scenario: Saving bootloader jump vectors, secure boot keys, and recovery partition pointers in resource-constrained microcontroller-based gateways. IC Role / Device Role / Timing Role: Trusted configuration store accessed before main application execution; protected by WP pin during normal operation. Use Value: Prevents unauthorized modification of boot flow, supporting secure firmware update mechanisms without dedicated security ICs. | Use Scenario: Storing unique device identifiers (MAC, UUID), TLS certificate fingerprints, and network credentials in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Low-leakage persistent memory enabling multi-year operation on primary lithium batteries. Use Value: Achieves <1 μA average system standby current by leveraging 0.8 μA max ISB, extending battery life beyond 5 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C08C-SSHM-T | Same 8-Kbit capacity and SOIC-8 package, but rated only for Standard (100 kHz) and Fast (400 kHz) I²C modes-no Fast Mode Plus (1 MHz) support. | Limited to systems with legacy I²C masters or where 1 MHz timing margins are insufficient. | Select when cost sensitivity outweighs need for fastest I²C throughput and FM+ voltage range is not required. |
| M24C08-RMN6TP | 8-Kbit I²C EEPROM in 8-lead TSSOP; supports 1 MHz up to 5.5 V, but lacks WP pin and uses different device addressing scheme (no A2 pin). | Requires software-based write protection and cannot coexist with other AT24C-series devices on same bus due to fixed address. | Choose for higher-voltage (up to 5.5 V) systems where hardware WP is unnecessary and board layout allows TSSOP footprint. |
Compared with AT24C08C-SSHM-T, AT24C08D-SSHM-T adds 1 MHz I²C capability and tighter low-voltage AC timing; versus M24C08-RMN6TP, it retains hardware write protection and A2-address flexibility critical for multi-device I²C networks.
Availability
AT24C08D-SSHM-T is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter configuration storage, and embedded bootloader settings requiring stable component supply, long-term data retention, and I²C bus compatibility across 1.7–3.6 V systems.
Supply support for AT24C08D-SSHM-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 Inc. is a leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.
The AT24C08D belongs to Microchip's serial EEPROM product line, designed specifically for low-voltage, low-power, and high-reliability nonvolatile data storage in space-constrained industrial, automotive, and consumer applications.
FAQ
What is the maximum I²C clock frequency supported by AT24C08D-SSHM-T?
The AT24C08D-SSHM-T supports three I²C speed modes: Standard mode up to 100 kHz, Fast mode up to 400 kHz, and Fast Mode Plus up to 1 MHz. The 1 MHz operation requires VCC between 2.5 V and 3.6 V; below 2.5 V, only Standard and Fast modes are guaranteed per the datasheet DS20006022A.
Does AT24C08D-SSHM-T require external pull-up resistors on SDA and SCL lines?
Yes, AT24C08D-SSHM-T requires external pull-up resistors on both SDA and SCL lines because SDA is open-drain and SCL is an input-only pin. Recommended values are ≤10 kΩ for SDA; exact resistance depends on bus capacitance and target I²C speed-e.g., 4 kΩ for 400 kHz, 1.3 kΩ for 1 MHz per datasheet guidelines.
How does the WP pin function on AT24C08D-SSHM-T?
The WP (Write-Protect) pin on AT24C08D-SSHM-T is an active-high hardware lock: when tied to VCC, it inhibits all write operations to the entire memory array; when tied to GND, normal writes are enabled. If left floating, it defaults to GND via internal pull-down, but Microchip recommends hardwiring for deterministic behavior.
What is the memory organization of AT24C08D-SSHM-T?
The AT24C08D-SSHM-T organizes its 8,192 bits as 1,024 words of 8 bits each, grouped into 64 pages of 16 bytes. This structure enables efficient page-write operations (up to 16 bytes per write cycle) and supports both random and sequential read modes, with address bits A9–A0 mapped across device address and data bytes per I²C protocol.
Is AT24C08D-SSHM-T compatible with 1.8 V microcontrollers?
Yes, AT24C08D-SSHM-T is fully compatible with 1.8 V microcontrollers: it operates from 1.7 V to 3.6 V, supports I²C Standard and Fast modes at 1.7–3.6 V, and specifies DC/AC characteristics-including input thresholds (VIL ≤ 0.3×VCC, VIH ≥ 0.7×VCC) and VOL-valid down to 1.8 V, ensuring reliable signal interpretation.
AT24C08D-SSHM-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:
- 4.5 µs
- Voltage - Supply:
- 1.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C08D-SSHM-T FAQ
1.How can I place an order for AT24C08D-SSHM-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C08D-SSHM-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 AT24C08D-SSHM-T reliable?
The price and inventory of AT24C08D-SSHM-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C08D-SSHM-T is usually 5 days.
3.What payment methods are accepted for AT24C08D-SSHM-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C08D-SSHM-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C08D-SSHM-T?
AT24C08D-SSHM-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C08D-SSHM-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 AT24C08D-SSHM-T?
For technical support, including AT24C08D-SSHM-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C08D-SSHM-T requirements.
6.How does Aetrix verify that AT24C08D-SSHM-T is sourced from the original manufacturer or authorized distributors?
All AT24C08D-SSHM-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 AT24C08D-SSHM-T meets industry standards.
7.What is the process for return or replacement of AT24C08D-SSHM-T?
All AT24C08D-SSHM-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C08D-SSHM-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 AT24C08D-SSHM-T part is unused and in its original packaging.
Return procedure for AT24C08D-SSHM-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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