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Microchip Technology AT24C04B-TSU-T
- Part No.:
- AT24C04B-TSU-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
AT24C04B-TSU-T.pdf
- Description:
- IC EEPROM 4KBIT I2C 1MHZ SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,101
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Product details
Overview
AT24C04B-TSU-T from Microchip Technology (formerly Atmel) is a 4-kbit two-wire serial EEPROM IC used for nonvolatile data storage in embedded control, sensor calibration, and configuration memory applications. It operates from 1.8 V to 5.5 V, supports up to 1 MHz I²C communication at 5 V, features hardware write protection via the WP pin, and delivers 1 million write cycles with 100-year data retention.
For engineers reviewing the AT24C04B-TSU-T datasheet, AT24C04B-TSU-T pinout, AT24C04B-TSU-T application, or AT24C04B-TSU-T equivalent, key selection considerations include its 5-lead SOT23 package, 16-byte page write capability, Schmitt-trigger inputs for noise immunity, and compatibility with standard and fast-mode I²C buses across industrial temperature range (–40°C to +85°C).
Technical Context
The AT24C04B-TSU-T implements a two-wire (I²C-compatible) serial interface with open-drain SDA/SCL lines, internal address counter for sequential reads, and hardware-based write protection via the WP pin. It uses a 9-bit internal word address for random access across its 512 × 8-bit memory array organized into 32 pages of 16 bytes each.
Its architecture includes a serial control logic block, high-voltage pump/timing circuitry for EEPROM programming, and a device address comparator that validates A2/A1 inputs (A0 is NC). The 5-lead SOT23 variant omits A0 and A1 pins, requiring software address bits A2 and A1 to be set to zero during communication.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4096 bits (512 × 8), organized as 32 pages × 16 bytes - enables efficient page-write optimization in firmware. |
| Supply Voltage Range | 1.8 V to 5.5 V - supports direct interfacing with 1.8 V, 2.5 V, 2.7 V, and 5 V microcontrollers without level shifting. |
| I²C Clock Frequency | Up to 1 MHz at 5 V; 400 kHz at 1.8/2.5/2.7 V - ensures timing compliance with standard and fast-mode I²C specifications. |
| Write Cycle Time | Max 5 ms - defines minimum interval between write commands; requires polling or timeout handling in host firmware. |
| Endurance & Retention | 1 million write cycles / 100 years data retention - qualifies for long-life industrial logging and calibration storage. |
| Operating Temperature | –40°C to +85°C - meets industrial-grade environmental requirements for automotive ECUs and factory automation. |
| Input Filtering | Schmitt-trigger inputs with 50 ns noise suppression - improves robustness against EMI in noisy PCB environments. |
Pinout & Package
AT24C04B-TSU-T is housed in a 5-lead SOT23 package (package code 5TS1), measuring 2.90 mm × 1.60 mm. Pin 1 is marked by a dot; leads are gull-wing shaped with 0.95 mm pitch. This compact footprint suits space-constrained designs such as wearables and IoT sensor nodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VCC) | Power supply input | Accepts 1.8–5.5 V; decoupling capacitor required within 10 mm for stable I²C operation. |
| 2 (WP) | Hardware write protect | Pulled high to lock full memory array; grounded for normal read/write - enables fail-safe configuration storage. |
| 3 (SCL) | Serial clock input | Positive-edge sampled; requires external pull-up; max frequency 1 MHz at 5 V. |
| 4 (SDA) | Serial data bidirectional I/O | Open-drain output; must be wire-ORed with other I²C devices; requires external pull-up. |
| 5 (GND) | Ground reference | Return path for VCC and signal integrity; should connect to low-impedance system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | Functional down to 1.8 V - eliminates need for voltage translators when interfacing with ultra-low-power MCUs. |
| Page write capability | 16-byte burst writes - reduces I²C transaction count and host CPU overhead vs. byte-by-byte programming. |
| Hardware write protection | Dedicated WP pin tied to VCC - prevents accidental overwrites during power transients or firmware faults. |
| Noise-immune inputs | Schmitt-trigger + 50 ns filtering on SCL/SDA - suppresses glitches from motor drivers or RF circuits sharing same PCB. |
| Industrial temperature grade | –40°C to +85°C operation - validated for deployment in engine control modules and outdoor metering equipment. |
Applications
| Smart Meter Calibration Storage | Industrial PLC Configuration Memory |
|---|---|
Use Scenario: Storing meter-specific calibration coefficients, tariff tables, and firmware version stamps in electricity/water/gas meters exposed to wide ambient temperatures. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed infrequently during commissioning or firmware updates via I²C bus. Use Value: 100-year data retention ensures calibration integrity over product lifetime without battery backup. | Use Scenario: Holding user-defined I/O mapping, alarm thresholds, and recipe parameters in programmable logic controllers operating in factory-floor environments. IC Role / Device Role / Timing Role: Persistent parameter store updated only during setup or maintenance; accessed via microcontroller's I²C peripheral. Use Value: Hardware WP pin prevents runtime corruption during electrical noise events common in industrial EMI-heavy settings. |
| Automotive Body Control Module | IoT Sensor Node Identity Storage |
Use Scenario: Saving seat position presets, mirror angles, and lighting profiles in automotive BCMs where space and power are constrained. IC Role / Device Role / Timing Role: Low-power EEPROM interfaced directly to 1.8 V or 3.3 V MCU; accessed during ignition-on initialization. Use Value: 5-lead SOT23 footprint minimizes PCB area; 1.8 V operation aligns with modern automotive MCU core voltages. | Use Scenario: Storing unique MAC addresses, cryptographic keys, and sensor calibration offsets in battery-powered wireless sensor nodes. IC Role / Device Role / Timing Role: Secure identity and calibration repository accessed once per boot via I²C before entering sleep mode. Use Value: 1 million write cycles support field firmware updates and recalibration over multi-year deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M24C04-RMN6TP | 4-kbit I²C EEPROM in 8-lead SOIC (8S1); supports 1 MHz @ 5 V but lacks 1.8 V min spec - rated down to 2.5 V only. | Requires level-shifting for 1.8 V systems; larger footprint limits use in ultra-compact designs. | Select if board already uses SOIC layout and operates ≥2.5 V; avoid for true 1.8 V designs. |
| BR24G04FJ-3GE2 | 4-kbit I²C EEPROM in 8-lead TSSOP (8A2); supports 1.7 V min, 1 MHz @ 5 V, and built-in write protection register (no WP pin). | Software-controlled protection replaces hardware WP; TSSOP footprint incompatible with SOT23 land pattern. | Choose when flexible protection policy is needed and PCB layout allows TSSOP; not drop-in for AT24C04B-TSU-T. |
Compared with M24C04-RMN6TP and BR24G04FJ-3GE2, AT24C04B-TSU-T uniquely combines guaranteed 1.8 V operation, hardware WP pin, and ultra-small 5-lead SOT23 packaging - making it optimal for space- and voltage-constrained industrial and automotive edge nodes.
Availability
AT24C04B-TSU-T is available at Aetrix Electronics and suitable for smart meter calibration storage, industrial PLC configuration memory, automotive body control modules, and IoT sensor node identity storage requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT24C04B-TSU-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 provider of microcontrollers, analog components, and memory solutions, with deep expertise in embedded control and nonvolatile storage technologies.
The AT24C04B series belongs to Microchip's legacy serial EEPROM product line, designed specifically for reliable, low-power, I²C-based configuration and calibration data storage in industrial, automotive, and consumer applications.
FAQ
What is the memory organization of the AT24C04B-TSU-T?
The AT24C04B-TSU-T contains 4096 bits of EEPROM memory organized as 512 words × 8 bits (512 × 8). Internally, it is structured into 32 pages of 16 bytes each, supporting both byte-write and 16-byte page-write operations. This layout enables efficient firmware-level buffering and reduces I²C bus transactions during bulk data updates. The device uses a 9-bit internal address counter for random access.
Does the AT24C04B-TSU-T support 1.8 V operation?
Yes, the AT24C04B-TSU-T is fully specified for operation from 1.8 V to 5.5 V. It supports I²C communication at 400 kHz across the entire 1.8–2.7 V range and up to 1 MHz at 5 V. Its Schmitt-trigger inputs and low ICC/ISB currents ensure reliable functionality in ultra-low-voltage systems such as energy-harvesting sensors and battery-powered IoT nodes.
What package type is used for the AT24C04B-TSU-T?
The AT24C04B-TSU-T uses a 5-lead SOT23 package (JEDEC MO-193, variant AB), designated as package code 5TS1. It measures 2.90 mm × 1.60 mm with 0.95 mm lead pitch and a maximum height of 1.10 mm. Pin 1 is marked by a dot; the package is lead-free/halogen-free and rated for industrial temperature (–40°C to +85°C).
How does the Write Protect (WP) pin function on the AT24C04B-TSU-T?
On the AT24C04B-TSU-T, the WP pin provides hardware-level write protection: when pulled high to VCC, the entire memory array is locked against write or erase operations; when grounded, full read/write access is enabled. This feature prevents accidental overwrites during power-up, brown-out, or firmware exceptions - critical for preserving calibration data and configuration parameters in mission-critical systems.
Can the AT24C04B-TSU-T be used in place of the AT24C04B-TH-T?
No - the AT24C04B-TSU-T and AT24C04B-TH-T are not interchangeable without PCB redesign. AT24C04B-TSU-T uses a 5-lead SOT23 package with pins VCC, WP, SCL, SDA, GND, while AT24C04B-TH-T uses an 8-lead TSSOP (8A2) with additional A0, A1, A2 address pins. Their footprints, pin counts, and device addressing schemes differ fundamentally; substitution requires layout and firmware changes.
AT24C04B-TSU-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- 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:
- SOT-23-5
AT24C04B-TSU-T FAQ
1.How can I place an order for AT24C04B-TSU-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C04B-TSU-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 AT24C04B-TSU-T reliable?
The price and inventory of AT24C04B-TSU-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C04B-TSU-T is usually 5 days.
3.What payment methods are accepted for AT24C04B-TSU-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C04B-TSU-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C04B-TSU-T?
AT24C04B-TSU-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C04B-TSU-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 AT24C04B-TSU-T?
For technical support, including AT24C04B-TSU-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C04B-TSU-T requirements.
6.How does Aetrix verify that AT24C04B-TSU-T is sourced from the original manufacturer or authorized distributors?
All AT24C04B-TSU-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 AT24C04B-TSU-T meets industry standards.
7.What is the process for return or replacement of AT24C04B-TSU-T?
All AT24C04B-TSU-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C04B-TSU-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 AT24C04B-TSU-T part is unused and in its original packaging.
Return procedure for AT24C04B-TSU-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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