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Microchip Technology AT24C08D-UUM1B-T
- Part No.:
- AT24C08D-UUM1B-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 4-XFBGA, WLCSP
- Datasheet:
-
AT24C08D-UUM1B-T.pdf
- Description:
- IC EEPROM 8KBIT I2C 1MHZ 4WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,786
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Product details
Overview
AT24C08D-UUM1B-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 with industrial temperature range (−40°C to +85°C), 1 MHz Fast Mode Plus support at 2.5–3.6V, and hardware write-protection via WP pin - used for nonvolatile parameter storage in embedded controllers, power management ICs, and sensor calibration modules.
For engineers reviewing the AT24C08D-UUM1B-T datasheet, AT24C08D-UUM1B-T pinout, AT24C08D-UUM1B-T application, or AT24C08D-UUM1B-T equivalent, key selection factors include VCC voltage range compatibility, I²C bus speed mode support (Standard/Fast/Fast Plus), page write capability (16-byte), endurance (1M cycles), and package-specific pin availability (e.g., WP and A2 presence in UDFN).
Technical Context
The AT24C08D-UUM1B-T implements a true I²C slave interface with Schmitt-triggered, filtered SDA/SCL inputs for noise immunity, supports bidirectional data transfer with ACK/NACK protocol, and uses internal high-voltage generation for EEPROM cell programming. Its memory is partitioned into 64 pages of 16 bytes each, enabling partial page writes without erasing adjacent bytes.
It features a Power-on Reset (POR) circuit with VPOR = 1.5V and tPUP = 100 µs minimum delay before command acceptance, and includes hardware write protection via dedicated WP pin - active when pulled to VCC - with internal pull-down on floating WP/A2 pins to ensure deterministic default behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1,024 × 8), enabling storage of firmware configuration, calibration coefficients, or device ID data in compact systems. |
| VCC Range | 1.7V to 3.6V - supports direct interfacing with 1.8V and 3.3V logic domains without level shifting. |
| I²C Speed Modes | 100 kHz (Std), 400 kHz (Fast), 1 MHz (Fast Mode Plus) - allows bandwidth scaling based on system noise and timing margin requirements. |
| Write Endurance | 1,000,000 cycles - ensures reliable field updates for logging, counter tracking, or dynamic parameter tuning over product lifetime. |
| Data Retention | 100 years at 55°C - guarantees long-term integrity of stored settings without refresh in industrial environments. |
| Active Current | ≤1.0 mA max at 3.6V/1 MHz write - minimizes power impact during configuration writes in battery-powered devices. |
| Standby Current | ≤0.8 µA max at 3.6V - enables ultra-low-power retention during system sleep modes. |
Pinout & Package
AT24C08D-UUM1B-T is packaged in an 8-pad UDFN (2.0 mm × 1.6 mm, 0.5 mm pitch) with exposed pad (GND or floating). Pin functions are validated per Microchip DS20006022A-page 4–5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| NC | No Connect | Unbonded terminal; must be left unconnected or tied to GND per layout guidelines. |
| A2 | Device Address Input | Hard-wired to GND/VCC to select one of two possible I²C addresses (10100xx); internally pulled down if floating. |
| GND | Ground Reference | Primary return path for VCC and signal currents; exposed pad may be connected here for thermal/electrical performance. |
| SDA | Serial Data I/O | Open-drain bidirectional line requiring external pull-up (≤10 kΩ); shares bus with other I²C slaves. |
| SCL | Serial Clock Input | Master-generated clock input; rising edge latches input data, falling edge outputs data; requires pull-up. |
| WP | Write-Protect Control | Hardware lock: driven to VCC disables all writes to full memory array; internally pulled down if floating. |
| VCC | Power Supply | 1.7–3.6V supply; must ramp monotonically at ≤0.1 V/µs; POR activates below 1.5V threshold. |
Key Features
| Feature | Design Value |
|---|---|
| 16-Byte Page Write | Enables efficient multi-byte updates without erasing full pages - reduces write time vs. byte-by-byte and avoids unnecessary wear on unrelated memory locations. |
| Schmitt Trigger Inputs | Improves noise immunity on SDA/SCL lines in electrically noisy industrial environments by rejecting sub-threshold glitches up to 100 ns. |
| Fast Mode Plus Support | Delivers 1 MHz I²C throughput at 2.5–3.6V - cuts configuration load time by 2.5× vs. Standard Mode, critical for high-volume manufacturing test. |
| Hardware Write Protection | Prevents accidental overwrites during power transients or firmware bugs by disabling writes when WP = VCC - no software dependency required. |
| Green Packaging | RoHS-compliant, halide-free, lead-free UDFN package - meets environmental compliance requirements for global industrial and consumer shipments. |
Applications
| Industrial Sensor Calibration | Smart Power Supply Configuration |
|---|---|
Use Scenario: Storing factory-trimmed gain/offset coefficients and temperature compensation tables in pressure, humidity, or current-sense sensors. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed at power-up or during field recalibration; I²C read initiated by MCU after POR stabilization. Use Value: Eliminates need for external trimming components and enables post-manufacturing calibration - reducing BOM cost and improving accuracy across temperature. | Use Scenario: Holding output voltage/current setpoints, protection thresholds, and fault log history in digitally controlled DC-DC modules. IC Role / Device Role / Timing Role: Persistent configuration store updated only during setup or maintenance; write-protected during normal operation via WP pin. Use Value: Ensures safe, repeatable power delivery across unit replacements and firmware upgrades - prevents misconfiguration-induced overvoltage events. |
| Embedded Controller Firmware Settings | IoT Edge Device Identity Storage |
Use Scenario: Saving user preferences, network credentials, and operational mode selections in HVAC controllers or PLC I/O modules. IC Role / Device Role / Timing Role: Low-power standby memory accessed infrequently; reads occur at boot, writes only during UI-initiated changes. Use Value: Maintains state across uncontrolled power cycles - improves user experience and simplifies field service without requiring backup capacitors. | Use Scenario: Securing unique device identifiers (e.g., MAC address, cryptographic keys) in battery-powered asset trackers or smart meters. IC Role / Device Role / Timing Role: Tamper-resistant identity vault; WP pin permanently tied to VCC after provisioning to prevent overwrite. Use Value: Provides immutable hardware identity for secure boot and cloud authentication - meets root-of-trust requirements without dedicated security IC. |
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 I²C interface, but in 8-lead SOIC package with identical pinout; lacks Fast Mode Plus (max 400 kHz). | Preferred where board space permits SOIC and 1 MHz speed is unnecessary; better hand-solderability and thermal mass. | Select when legacy footprint compatibility or higher thermal dissipation is prioritized over speed and miniaturization. |
| M95M01-RDW6TP | 8-Mbit SPI EEPROM (not I²C); operates at 1.8–5.5V; supports 10 MHz SPI clock; no WP pin - uses software write enable. | Suitable for systems already using SPI peripherals; incompatible with I²C-only buses; requires different driver stack and timing control. | Choose only if migrating from I²C to SPI architecture or adding high-bandwidth logging - not a drop-in replacement. |
Compared with AT24C08C-SSHM-T, AT24C08D-UUM1B-T delivers 2.5× faster configuration loading via 1 MHz Fast Mode Plus and fits space-constrained layouts with its 2.0 × 1.6 mm UDFN; versus M95M01-RDW6TP, it retains I²C compatibility and hardware write protection but trades off raw throughput for protocol simplicity and pin count reduction.
Availability
AT24C08D-UUM1B-T is available at Aetrix Electronics and suitable for industrial sensor calibration, smart power supply configuration, and embedded controller firmware settings requiring stable component supply, long-term data retention, and low-voltage I²C interoperability.
Supply support for AT24C08D-UUM1B-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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory products, with ISO 9001-certified quality systems and global distribution.
The AT24C08D belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-power nonvolatile storage in space- and voltage-constrained embedded systems across industrial, automotive, and consumer applications.
FAQ
What is the maximum I²C clock frequency supported by AT24C08D-UUM1B-T?
AT24C08D-UUM1B-T supports up to 1 MHz in Fast Mode Plus, but only when VCC is between 2.5V and 3.6V. At 1.7–3.6V, it operates at 400 kHz (Fast Mode) or 100 kHz (Standard Mode). The 1 MHz capability enables faster firmware updates and configuration loads compared to older EEPROM generations, directly reducing system initialization time.
Does AT24C08D-UUM1B-T require external pull-up resistors on SDA and SCL lines?
Yes, AT24C08D-UUM1B-T requires external pull-up resistors on both SDA and SCL lines because its SDA pin is open-drain and SCL is a CMOS input. Microchip specifies maximum values of 10 kΩ for SDA and recommends matching pull-up strength to bus capacitance and target I²C speed - e.g., 1.3 kΩ for 1 MHz operation per DS20006022A-page 11.
How does the WP pin function on AT24C08D-UUM1B-T?
On AT24C08D-UUM1B-T, the WP pin provides hardware-level write protection: when tied to VCC, it disables all write operations to the entire memory array; when grounded, normal writes are enabled. If left floating, the internal strong pull-down defaults it to GND - but Microchip recommends hard-wiring WP to avoid noise-induced glitches during system transients.
What is the memory organization of AT24C08D-UUM1B-T?
AT24C08D-UUM1B-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 16-byte page writes - allowing partial writes within a page without disturbing adjacent bytes - and supports both random and sequential read modes for flexible data access patterns in embedded applications.
Is AT24C08D-UUM1B-T compatible with standard I²C protocol specifications?
Yes, AT24C08D-UUM1B-T is fully compliant with standard I²C protocol specifications including Start/Stop conditions, ACK/NACK handshaking, 7-bit addressing with R/W bit, and clock stretching support. It implements Schmitt-triggered inputs and spike filtering to meet I²C noise immunity requirements, and its timing parameters (tLOW, tHIGH, tSU.STA, etc.) conform to I²C-bus specification UM10204 for all supported modes.
AT24C08D-UUM1B-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 4-XFBGA, WLCSP
- 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:
- 4-WLCSP
AT24C08D-UUM1B-T FAQ
1.How can I place an order for AT24C08D-UUM1B-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C08D-UUM1B-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-UUM1B-T reliable?
The price and inventory of AT24C08D-UUM1B-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-UUM1B-T is usually 5 days.
3.What payment methods are accepted for AT24C08D-UUM1B-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C08D-UUM1B-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C08D-UUM1B-T?
AT24C08D-UUM1B-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C08D-UUM1B-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-UUM1B-T?
For technical support, including AT24C08D-UUM1B-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C08D-UUM1B-T requirements.
6.How does Aetrix verify that AT24C08D-UUM1B-T is sourced from the original manufacturer or authorized distributors?
All AT24C08D-UUM1B-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-UUM1B-T meets industry standards.
7.What is the process for return or replacement of AT24C08D-UUM1B-T?
All AT24C08D-UUM1B-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C08D-UUM1B-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-UUM1B-T part is unused and in its original packaging.
Return procedure for AT24C08D-UUM1B-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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