My Inquiry
My Account
Microchip Technology AT24C04BU3-UU-T
- Part No.:
- AT24C04BU3-UU-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VFBGA
- Datasheet:
-
AT24C04BU3-UU-T.pdf
- Description:
- IC EEPROM 4KBIT I2C 1MHZ 8DBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,188
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT24C04BU3-UU-T from Microchip Technology is a 4K-bit (512 × 8) two-wire serial EEPROM with 1.8V to 5.5V operation, 16-byte page write capability, and hardware write protection via the WP pin. It delivers 1 million write cycles endurance and 100-year data retention, and is used in industrial sensor calibration storage, embedded system configuration memory, and power-meter firmware parameter backup.
For engineers reviewing the AT24C04BU3-UU-T datasheet, AT24C04BU3-UU-T pinout, AT24C04BU3-UU-T application, or AT24C04BU3-UU-T equivalent, key selection criteria include I²C bus compatibility at 400 kHz (1.8V), dBGA2 package footprint constraints, WP pin-based hardware lock for critical NV settings, and 5 ms max self-timed write cycle timing.
Technical Context
The AT24C04BU3-UU-T implements a standard two-wire (I²C-compatible) interface with Schmitt-triggered, noise-filtered SDA/SCL inputs. Its internal architecture includes a 9-bit word address counter, 32-page × 16-byte memory organization, and a serial control logic block that handles START/STOP detection, ACK generation, and address decoding using A2/A1 hardwired pins (A0 is NC).
Write operations support both byte and 16-byte page modes, with automatic address increment within pages and rollover at page boundaries. The device enters low-power standby mode after STOP condition receipt and supports software reset via 9-clock dummy sequence following protocol interruption.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4096 bits (512 words × 8 bits); sufficient for storing sensor coefficients, device IDs, or small boot configuration tables. |
| Supply Voltage Range | 1.8 V to 5.5 V; enables direct interfacing with 1.8V, 2.5V, 3.3V, and 5V microcontrollers without level shifting. |
| I²C Clock Frequency | Up to 400 kHz at 1.8V; ensures reliable communication on low-voltage embedded buses with typical RC time constants. |
| Page Write Size | 16 bytes per page; minimizes write latency versus byte writes and aligns with common MCU cache line sizes. |
| Write Cycle Time | Max 5 ms; defines minimum interval between successive write commands and impacts firmware timeout design. |
| Data Retention | 100 years at +25°C; guarantees long-term integrity of stored calibration or security keys without refresh. |
| Endurance | 1 million write cycles per memory location; supports frequent field updates in telemetry or logging applications. |
Pinout & Package
AT24C04BU3-UU-T is housed in an 8-ball die Ball Grid Array (dBGA2) package measuring 2.0 mm × 2.5 mm with 0.5 mm pitch. The package is lead-free/halogen-free and rated for industrial temperature range (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Accepts 1.8V–5.5V; decoupling capacitor placement near this pin is mandatory for noise immunity during write cycles. |
| GND | Ground reference | Common return path for all internal circuitry; must be connected to system ground plane with low-impedance trace. |
| SCL | Serial clock input | Positive-edge sampled clock; requires external pull-up; determines maximum I²C bus speed (400 kHz @ 1.8V). |
| SDA | Serial data bidirectional I/O | Open-drain output; requires external pull-up; supports multi-master bus sharing and wire-OR logic. |
| WP | Hardware write protect | Active-high signal; when tied to VCC, locks entire memory array against accidental writes during power-up or firmware faults. |
| A0, A1, A2 | Device address inputs | A2 and A1 are hardwired address bits; A0 is no-connect (NC) for AT24C04B; enables up to four devices on same I²C bus. |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage I²C interface | Operates down to 1.8V with guaranteed 400 kHz timing - eliminates need for voltage translators in battery-powered designs. |
| Hardware write protection | WP pin provides deterministic, power-on-safe lock of memory contents - prevents corruption during brown-out or reset sequences. |
| 16-byte page write mode | Reduces average write time by >75% vs. byte writes for sequential data - improves firmware update throughput in field-programmable systems. |
| Schmitt-trigger inputs | Suppresses bus noise up to 50 ns - increases robustness in electrically noisy industrial environments (e.g., motor drives, PLCs). |
| Self-timed internal write cycle | Removes need for external write-complete polling delay - simplifies driver code and avoids fixed-time busy-wait loops. |
Applications
| Industrial Sensor Calibration Storage | Embedded System Configuration Memory |
|---|---|
Use Scenario: Storing factory-calibrated temperature/pressure coefficients in HVAC sensors deployed across wide ambient ranges. IC Role / Device Role / Timing Role: Nonvolatile parameter repository accessed at power-up via I²C; retains values across 10+ year product lifetime. Use Value: Eliminates recalibration labor and enables plug-and-play replacement; 100-year retention ensures accuracy over full service life. | Use Scenario: Holding boot-time configuration flags (e.g., COM port baud rate, display brightness, network MAC override) in medical diagnostic handhelds. IC Role / Device Role / Timing Role: I²C-configurable NV memory mapped into MCU's startup initialization routine. Use Value: Enables field-upgradable settings without firmware reflash; WP pin prevents accidental overwrite during hot-plug USB debug sessions. |
| Smart Energy Meter Firmware Parameters | Automotive Body Control Module Settings |
Use Scenario: Saving tariff schedules, pulse constants, and tamper-event logs in DIN-rail mounted electricity meters operating at –25°C to +70°C. IC Role / Device Role / Timing Role: Low-power, high-endurance NV storage synchronized to meter's real-time clock interrupt. Use Value: Withstands 1M write cycles - supports daily log entries for >27 years; 1.8V operation extends battery backup runtime during mains failure. | Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in automotive BCMs subject to thermal cycling and ESD events. IC Role / Device Role / Timing Role: I²C-connected EEPROM interfaced to 3.3V CAN microcontroller; WP pin tied to ignition-sensed enable rail. Use Value: Schmitt-trigger inputs reject injection noise from adjacent 12V solenoid drivers; dBGA2 package fits tight PCB space behind dashboard bezel. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C04D-SSHM-T | Same 4K-bit capacity and 1.8V–5.5V range, but in 8-lead SOIC (8S1) package; lacks dBGA2 footprint compatibility. | Preferred for through-hole or legacy SOIC-based designs; not suitable for ultra-compact layouts requiring 2.0×2.5 mm area. | Select when board space allows SOIC and reworkability is prioritized over miniaturization. |
| M24C04-RMN6TP | 4K-bit EEPROM with identical I²C timing and WP functionality, but uses 8-lead TSSOP (8A2); higher max operating current (3 mA vs. 2 mA at 5V). | Better thermal dissipation in convection-cooled enclosures; slightly larger footprint (3.0×4.4 mm vs. 2.0×2.5 mm). | Choose for industrial environments where TSSOP handling and thermal margin outweigh size constraints. |
Compared with AT24C04BU3-UU-T, AT24C04D-SSHM-T offers easier hand-soldering but occupies ~5× more board area, while M24C04-RMN6TP trades minimal current increase for improved manufacturability in automated SMT lines - all three share identical functional behavior and register-level compatibility.
Availability
AT24C04BU3-UU-T is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded configuration storage, and smart meter firmware parameter retention requiring stable component supply across extended product lifecycles.
Supply support for AT24C04BU3-UU-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 nonvolatile memory solutions for industrial, automotive, and consumer markets.
The AT24C04B series is designed for low-power, space-constrained embedded systems requiring reliable, long-life serial EEPROM storage with robust I²C interoperability and hardware data protection.
FAQ
What is the package type and dimensions of the AT24C04BU3-UU-T?
The AT24C04BU3-UU-T uses an 8-ball dBGA2 package with 2.0 mm × 2.5 mm body size and 0.5 mm ball pitch. It is lead-free/halogen-free and conforms to JEDEC MO-229 standards. This compact footprint is optimized for high-density PCB layouts in portable and space-limited industrial modules where the AT24C04BU3-UU-T serves as primary configuration memory.
Does the AT24C04BU3-UU-T support 1 MHz I²C operation?
No, the AT24C04BU3-UU-T supports up to 400 kHz I²C clock frequency at 1.8V, 2.5V, and 2.7V supply levels, and up to 1 MHz only at 5.0V. Since AT24C04BU3-UU-T is specified for 1.8V–5.5V operation and commonly used in low-voltage systems, its practical maximum speed is 400 kHz - a constraint explicitly defined in the AC characteristics table of the AT24C04BU3-UU-T datasheet.
How does the WP pin function on the AT24C04BU3-UU-T?
The WP (Write Protect) pin on the AT24C04BU3-UU-T is an active-high hardware lock: when pulled to VCC, it disables all write operations to the entire memory array; when grounded, normal read/write access is enabled. This feature prevents unintended overwrites during power transitions or firmware errors, making the AT24C04BU3-UU-T suitable for safety-critical parameter storage where data integrity is non-negotiable.
Can the AT24C04BU3-UU-T be used in place of the AT24C04B-TH-T?
Yes, the AT24C04BU3-UU-T and AT24C04B-TH-T share identical electrical specifications, memory organization (4K-bit, 512 × 8), and I²C protocol behavior. Their difference lies solely in packaging: AT24C04BU3-UU-T uses dBGA2 (8U3-1), while AT24C04B-TH-T uses TSSOP (8A2). Therefore, the AT24C04BU3-UU-T is a functional alternative if the PCB layout accommodates the smaller dBGA2 footprint and reflow profile.
What is the maximum number of devices addressable on a single I²C bus using AT24C04BU3-UU-T?
The AT24C04BU3-UU-T uses A2 and A1 as hardware address bits (A0 is NC), allowing up to four devices (binary 00–11) on the same I²C bus. Each device responds to a unique 7-bit address prefix (1010xxX), where "xx" represents A2/A1 states. This addressing scheme enables scalable multi-sensor node configurations without bus contention - a core capability confirmed in the AT24C04BU3-UU-T device addressing section.
AT24C04BU3-UU-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 4Kbit
- Memory Organization:
- 512 x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 550 ns
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-dBGA (1.5x2)
AT24C04BU3-UU-T FAQ
1.How can I place an order for AT24C04BU3-UU-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C04BU3-UU-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 AT24C04BU3-UU-T reliable?
The price and inventory of AT24C04BU3-UU-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C04BU3-UU-T is usually 5 days.
3.What payment methods are accepted for AT24C04BU3-UU-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C04BU3-UU-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C04BU3-UU-T?
AT24C04BU3-UU-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C04BU3-UU-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 AT24C04BU3-UU-T?
For technical support, including AT24C04BU3-UU-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C04BU3-UU-T requirements.
6.How does Aetrix verify that AT24C04BU3-UU-T is sourced from the original manufacturer or authorized distributors?
All AT24C04BU3-UU-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 AT24C04BU3-UU-T meets industry standards.
7.What is the process for return or replacement of AT24C04BU3-UU-T?
All AT24C04BU3-UU-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C04BU3-UU-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 AT24C04BU3-UU-T part is unused and in its original packaging.
Return procedure for AT24C04BU3-UU-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24C04BU3-UU-T Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
