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Microchip Technology AT24C08D-XHM-B
- Part No.:
- AT24C08D-XHM-B
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT24C08D-XHM-B.pdf
- Description:
- IC EEPROM 8KBIT I2C 1MHZ 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:955
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Product details
Overview
AT24C08D-XHM-B from Microchip Technology is an I²C-compatible 8-Kbit serial EEPROM organized as 1,024 × 8 bits, operating from 1.7V to 3.6V with industrial temperature range (−40°C to +85°C), supporting Standard (100 kHz), Fast (400 kHz), and Fast Mode Plus (1 MHz) I²C speeds, and featuring hardware write protection via WP pin - used in embedded system configuration storage, sensor calibration data retention, and power-fail-safe parameter backup.
For engineers reviewing the AT24C08D-XHM-B datasheet, AT24C08D-XHM-B pinout, AT24C08D-XHM-B application, or AT24C08D-XHM-B equivalent, this page delivers verified electrical specs, package-confirmed pin functions, noise-immune I²C timing compliance, endurance (1M cycles), and data retention (100 years) - critical for low-voltage industrial and portable electronics design validation.
Technical Context
The AT24C08D-XHM-B operates as a slave device on a two-wire I²C bus, using Schmitt-triggered SCL/SDA inputs with integrated spike filtering for robust noise immunity in electrically noisy environments. Its internal architecture includes a hardware address comparator (A2 input), high-voltage generation circuit for EEPROM programming, and POR logic ensuring reliable power-up behavior.
It supports byte and 16-byte page writes with self-timed write cycles ≤5 ms, random/sequential read modes, and bidirectional data transfer synchronized to SCL rising/falling edges. The WP pin enables full-array hardware write protection when tied to VCC, while A2 allows dual-device addressing on shared buses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1,024 × 8 bits), enabling compact nonvolatile storage for firmware flags, calibration coefficients, or device IDs. |
| Supply Voltage | 1.7V–3.6V - compatible with modern ultra-low-power microcontrollers and battery-powered systems. |
| I²C Speed Modes | 100 kHz (Std), 400 kHz (Fast), 1 MHz (FM+) - selectable per system clock budget and noise environment. |
| Active Current | ≤1.0 mA max at 3.6V/1 MHz write - minimizes dynamic power draw during configuration updates. |
| Standby Current | ≤0.8 μA max at 3.6V - essential for multi-year battery operation in IoT edge nodes. |
| Endurance & Retention | 1,000,000 write cycles / 100 years data retention at 55°C - validated for long-life industrial deployments. |
| ESD Protection | >4,000 V HBM - ensures reliability during handling and board-level integration. |
Pinout & Package
AT24C08D-XHM-B is supplied in an 8-pad UDFN package (2.0 mm × 1.6 mm, 0.5 mm pitch) with exposed pad (optional GND connection). Pin functions are confirmed per Microchip DS20006022A-page 4–5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Unbonded die pad; must be left floating or grounded per layout guidelines - no electrical function. |
| 2 (NC) | No Connect | Unbonded die pad; no routing or termination required - avoids unintended coupling. |
| 3 (A2) | Device Address Input | Hardwired to GND/VCC to select one of two possible I²C addresses (10100xx); internally pulled down if floating. |
| 4 (GND) | Ground Reference | Primary return path for VCC and I/O; requires low-impedance connection to system ground plane. |
| 5 (SDA) | Serial Data I/O | Open-drain bidirectional line; requires external pull-up (≤10 kΩ) and wire-OR capability with other I²C slaves. |
| 6 (SCL) | Serial Clock Input | Master-generated clock; latches input data on rising edge, outputs data on falling edge - defines bus timing. |
| 7 (WP) | Write-Protect Control | Hardware lock: tied to VCC disables all writes; tied to GND enables full memory access - prevents accidental corruption. |
| 8 (VCC) | Power Supply | 1.7–3.6V core supply; slew rate ≤0.1 V/µs required for valid POR - decoupling capacitor mandatory. |
Key Features
| Feature | Design Value |
|---|---|
| 16-byte page write mode | Enables efficient burst writes without inter-byte delays - reduces total update time by up to 94% vs. byte-by-byte writes. |
| Schmitt-triggered inputs | Rejects sub-100 ns noise spikes on SCL/SDA - eliminates false start/stop detection in motor-driven or RF-rich PCBs. |
| Internal pull-down on A2/WP | Ensures deterministic default state when pins float - removes need for external biasing in space-constrained layouts. |
| Fast Mode Plus support | 1 MHz operation at ≥2.5V - doubles throughput over standard Fast Mode while maintaining compatibility with legacy I²C masters. |
| Green packaging | RoHS-compliant, halide-free, lead-free UDFN - meets IPC/JEDEC J-STD-020 moisture sensitivity level 1 (MSL1). |
Applications
| Industrial Sensor Node | Medical Wearable |
|---|---|
|
Use Scenario: Storing calibrated offset/gain values and firmware revision metadata across power cycles in a battery-powered temperature/humidity sensor node. IC Role / Device Role / Timing Role: Nonvolatile configuration register - retains user-defined thresholds and calibration coefficients between wake/sleep cycles. Use Value: Eliminates recalibration after each power loss; leverages 0.8 μA standby current to extend coin-cell life beyond 5 years. |
Use Scenario: Securing patient-specific therapy parameters and usage logs in a Class II wearable insulin pump controller. IC Role / Device Role / Timing Role: Tamper-resistant data vault - WP pin hardwired to VCC prevents runtime overwrite of safety-critical settings. Use Value: Meets IEC 62304 SW safety requirements via hardware-enforced write protection and 1M-cycle endurance. |
| Smart Energy Meter | Automotive Body Control Module |
|
Use Scenario: Recording cumulative kWh consumption, tariff schedules, and tamper-event timestamps in a DIN-rail mounted meter. IC Role / Device Role / Timing Role: Power-fail-safe logging buffer - uses self-timed ≤5 ms writes to capture data before brownout. Use Value: Guarantees atomic write completion under voltage sag (1.7V min), preventing partial-record corruption. |
Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in a 12V automotive BCM with stop/start capability. IC Role / Device Role / Timing Role: Low-voltage configuration store - operates reliably at 1.7V during cold-crank transients. Use Value: Maintains user preferences through repeated engine restarts without requiring backup capacitors or supercaps. |
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 density and I²C interface, but in 8-lead SOIC package; lacks Fast Mode Plus (1 MHz) support - max 400 kHz only. | Preferred where board space permits larger SOIC and 1 MHz speed is unnecessary; identical endurance/retention specs. | Select when legacy SOIC footprint compatibility is required and FM+ bandwidth is not needed. |
| M95M01-RDW6TP | 8-Mbit SPI EEPROM (not I²C); 2.5–5.5V supply; 10 MHz SPI clock; no WP pin - uses software write enable (WREN). | Suitable for systems with SPI master availability and higher throughput needs; incompatible with I²C-only controllers. | Choose only if migrating from I²C to SPI architecture and requiring >10× faster write throughput. |
Compared with AT24C08D-XHM-B, the AT24C08C-SSHM-T offers identical functionality in a larger SOIC package without FM+, while the M95M01-RDW6TP trades I²C simplicity for SPI speed and wider voltage range - neither is pin-compatible, and both require interface and layout changes.
Availability
AT24C08D-XHM-B is available at Aetrix Electronics and suitable for industrial sensor nodes, medical wearables, smart energy meters, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT24C08D-XHM-B 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 ISO 9001-certified manufacturing and design centers worldwide.
The AT24C08D-XHM-B belongs to Microchip's AT24C family of I²C serial EEPROMs, engineered for ultra-low-power, high-reliability nonvolatile storage in space-constrained, battery-operated, and industrial-grade applications.
FAQ
What is the maximum I²C clock frequency supported by AT24C08D-XHM-B?
The AT24C08D-XHM-B supports three I²C speed modes: Standard mode up to 100 kHz (1.7–3.6V), Fast mode up to 400 kHz (1.7–3.6V), and Fast Mode Plus up to 1 MHz (2.5–3.6V). Operation above 400 kHz requires VCC ≥2.5V and adherence to Fast Mode Plus AC timing specifications including tLOW/tHIGH ≤500 ns.
Does AT24C08D-XHM-B include hardware write protection?
Yes, AT24C08D-XHM-B features a dedicated Write-Protect (WP) pin. When WP is tied to VCC, all write operations to the entire memory array are inhibited; when tied to GND, normal write access is enabled. This hardware lock prevents accidental or malicious overwrites independent of firmware control.
What is the memory organization of AT24C08D-XHM-B?
AT24C08D-XHM-B is organized as 1,024 words × 8 bits (8,192 total bits), internally structured into 64 pages of 16 bytes each. This enables efficient 16-byte page writes and supports both random and sequential read modes - optimizing data logging and configuration storage efficiency.
How does the A2 pin function in AT24C08D-XHM-B?
The A2 pin on AT24C08D-XHM-B serves as a hardware device address bit, allowing up to two AT24C08D-XHM-B devices on the same I²C bus. It is internally pulled down to GND if left unconnected, but Microchip recommends hardwiring it to GND or VCC for deterministic addressing and noise immunity.
What package type is used for AT24C08D-XHM-B?
AT24C08D-XHM-B is packaged in an 8-pad UDFN (2.0 mm × 1.6 mm, 0.5 mm pitch) with an exposed thermal pad. This compact, lead-free, RoHS-compliant package supports automated assembly and provides superior thermal performance compared to SOIC or TSSOP alternatives.
AT24C08D-XHM-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- 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-TSSOP
AT24C08D-XHM-B FAQ
1.How can I place an order for AT24C08D-XHM-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C08D-XHM-B 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-XHM-B reliable?
The price and inventory of AT24C08D-XHM-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C08D-XHM-B is usually 5 days.
3.What payment methods are accepted for AT24C08D-XHM-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C08D-XHM-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C08D-XHM-B?
AT24C08D-XHM-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C08D-XHM-B 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-XHM-B?
For technical support, including AT24C08D-XHM-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C08D-XHM-B requirements.
6.How does Aetrix verify that AT24C08D-XHM-B is sourced from the original manufacturer or authorized distributors?
All AT24C08D-XHM-B 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-XHM-B meets industry standards.
7.What is the process for return or replacement of AT24C08D-XHM-B?
All AT24C08D-XHM-B units undergo pre-shipment inspection (PSI). If there is an issue with AT24C08D-XHM-B, 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-XHM-B part is unused and in its original packaging.
Return procedure for AT24C08D-XHM-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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