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Microchip Technology AT24C04D-STUM-T
- Part No.:
- AT24C04D-STUM-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
AT24C04D-STUM-T.pdf
- Description:
- IC EEPROM 4KBIT I2C 1MHZ SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:15,707
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Product details
Overview
AT24C04D-STUM-T from Microchip Technology (formerly Atmel) is a 4-Kbit I²C-compatible serial EEPROM organized as 512 × 8 bits, operating from 1.7V to 3.6V, supporting 1 MHz Fast Mode Plus (2.5–3.6V), and featuring hardware write protection via the WP pin for nonvolatile data retention in embedded control and sensor calibration applications.
For engineers reviewing the AT24C04D-STUM-T datasheet, AT24C04D-STUM-T pinout, AT24C04D-STUM-T application, or AT24C04D-STUM-T equivalent, this page delivers verified electrical specs, SOIC-8 package mapping, I²C timing behavior, endurance (1M cycles), and real-world use cases including firmware parameter storage and device configuration backup.
Technical Context
The AT24C04D-STUM-T implements a true I²C slave interface with bidirectional open-drain SDA and input-only SCL, incorporating Schmitt-trigger inputs and noise-filtered logic for robust bus operation in electrically noisy environments. It uses an internal 9-bit address counter and supports cascading up to four devices on one bus via A1/A2 hardware address pins.
Its memory is partitioned into 32 pages of 16 bytes each, enabling partial or full page writes with automatic address rollover within page boundaries. Write protection is strictly hardware-gated by the WP pin state sampled at Stop condition, and all write cycles are self-timed with ≤5 ms maximum duration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Kbit (512 × 8 bits), sufficient for storing calibration coefficients, device IDs, or small firmware patches in space-constrained designs. |
| Supply Voltage Range | 1.7 V to 3.6 V - enables direct interfacing with 1.8 V and 3.3 V microcontrollers without level-shifting. |
| I²C Speed Modes | 100 kHz (Std), 400 kHz (Fast), 1 MHz (Fast Mode Plus @ 2.5–3.6 V) - supports high-throughput configuration updates in time-critical systems. |
| Write Endurance | 1,000,000 cycles - ensures reliable field reprogramming over product lifetime in industrial logging or adaptive control loops. |
| Data Retention | 100 years at +25°C - guarantees long-term integrity of stored settings without battery backup. |
| Active/Standby Current | ≤1 mA active (max), ≤0.8 μA standby (max) - minimizes power budget impact in always-on IoT edge nodes. |
| Page Write Capacity | 16-byte page buffer with partial write support - reduces I²C transaction count when updating multi-byte records like timestamps or sensor offsets. |
Pinout & Package
AT24C04D-STUM-T is supplied in an 8-lead SOIC package (STUM = SOIC-8, tape-and-reel). Pin functions are validated per Atmel-8896E datasheet Rev. 012017.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: NC | No Connect | Unbonded die pad; may be tied to GND or left floating with no functional impact. |
| 2: A1 | Hardware Address Input | Defines bit 5 of 7-bit I²C slave address; pulled down internally if unconnected - enables up to four devices on same bus. |
| 3: A2 | Hardware Address Input | Defines bit 6 of 7-bit I²C slave address; same internal pull-down behavior as A1. |
| 4: GND | Ground Reference | System ground connection required for stable biasing and noise immunity. |
| 5: SDA | Serial Data Line | Open-drain bidirectional I²C data line requiring external pull-up resistor ≤10 kΩ; supports wire-OR with other slaves. |
| 6: SCL | Serial Clock Line | Input-only clock line; must be pulled high externally; rising edge latches input, falling edge clocks out data. |
| 7: WP | Write Protect Input | High = full-array write inhibit; sampled at Stop condition - provides tamper-resistant configuration locking. |
| 8: VCC | Power Supply | 1.7–3.6 V supply input; invalid voltage causes undefined behavior and must be stabilized before communication. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger & filtered inputs | Enables reliable I²C operation in noisy industrial environments (e.g., motor drives, PLCs) without external RC filtering. |
| Hardware write protection (WP pin) | Prevents accidental overwrites during firmware updates or brown-out conditions - critical for safety-critical configuration storage. |
| 16-byte page write mode | Reduces I²C bus occupancy by up to 87% vs. byte-write for 16-byte records (e.g., 4× 32-bit sensor calibration sets). |
| Ultra-low standby current (0.8 μA max) | Extends battery life in portable medical monitors or wireless sensors where EEPROM remains powered between wake cycles. |
| 100-year data retention | Eliminates need for periodic refresh or backup power in infrastructure equipment deployed for decades. |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
|
Use Scenario: Storing factory-calibrated gain/offset values for analog front-end circuits in pressure or temperature transmitters. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed at power-up via I²C; retains values across cold starts and firmware updates. Use Value: Eliminates recalibration labor and ensures traceable accuracy compliance (e.g., ISO 13485) without external battery or supercapacitor. |
Use Scenario: Holding user-selectable therapy parameters (e.g., infusion rate limits, alarm thresholds) in portable insulin pumps. IC Role / Device Role / Timing Role: Secure, low-power configuration memory with hardware write lock to prevent runtime corruption during ESD events. Use Value: Meets IEC 62304 safety requirements for persistent data integrity and enables audit-ready parameter history logs. |
| Smart Meter Firmware Patch Storage | Automotive Body Control Module (BCM) Settings |
|
Use Scenario: Caching minor firmware patches or regional tariff tables in AMI smart meters deployed in remote utility grids. IC Role / Device Role / Timing Role: I²C-accessible update staging area; written once per OTA cycle, read at boot before main MCU firmware loads. Use Value: Enables field-upgradable functionality without NAND flash wear leveling complexity or high-voltage programming circuitry. |
Use Scenario: Saving seat/mirror position presets, lighting profiles, and door lock preferences in automotive BCMs. IC Role / Device Role / Timing Role: Low-voltage (1.7–3.6 V) EEPROM interfaced directly to 3.3 V CAN/LIN microcontroller; survives stop-start battery cycling. Use Value: Guarantees user personalization persistence across 15+ year vehicle lifetimes with zero maintenance or backup power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Microchip AT24C04C-SSHM-T | Same 4-Kbit capacity and SOIC-8 package, but rated only for 100 kHz / 400 kHz I²C (no FM+ support); max VCC = 5.5 V. | Limited to legacy 3.3 V or 5 V systems without 1 MHz timing demands; lacks Fast Mode Plus compatibility. | Select when FM+ is unnecessary and broader voltage range (2.5–5.5 V) is preferred over high-speed write throughput. |
| ON Semiconductor CAT24C04HU4IGT3 | Pin-compatible SOIC-8, identical 4-Kbit organization, but specifies 1 MHz operation only at VCC ≥ 2.7 V (vs. AT24C04D-STUM-T's 2.5 V minimum). | Marginally less flexible in ultra-low-voltage 2.5 V systems; otherwise matches endurance (1M cycles) and retention (100 yr). | Choose for cost-sensitive volume production where 2.5–2.7 V operation is not required and second-source assurance is prioritized. |
Compared with AT24C04D-STUM-T, the AT24C04C-SSHM-T trades FM+ speed for wider voltage tolerance, while the CAT24C04HU4IGT3 offers equivalent performance above 2.7 V but narrows the usable low-voltage window - making AT24C04D-STUM-T optimal for 2.5 V–3.6 V battery-powered or energy-harvesting designs demanding fastest I²C throughput.
Availability
AT24C04D-STUM-T is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and smart meter firmware patch storage requiring stable component supply and long-term lifecycle continuity.
Supply support for AT24C04D-STUM-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 acquired Atmel in 2016 and maintains full technical and manufacturing continuity for the AT24Cxx EEPROM family, delivering high-reliability nonvolatile memory solutions since 1980.
The AT24C04D belongs to Microchip's serial EEPROM product line, engineered for low-power, low-voltage embedded systems where data integrity, write endurance, and I²C interoperability are mission-critical.
FAQ
What is the maximum I²C clock frequency supported by AT24C04D-STUM-T?
The AT24C04D-STUM-T supports 1 MHz Fast Mode Plus operation, but only when VCC is between 2.5 V and 3.6 V. At 1.7–2.4 V, it operates up to 400 kHz (Fast Mode). This voltage-dependent speed grading ensures timing margin compliance across its full supply range - a key differentiator from fixed-speed EEPROMs.
Does AT24C04D-STUM-T require external pull-up resistors on SDA and SCL lines?
Yes, AT24C04D-STUM-T requires external pull-up resistors on both SDA and SCL. The datasheet specifies SDA pull-up ≤10 kΩ; SCL pull-up value depends on bus capacitance and target speed. For 1 MHz operation, typical values range from 2.2 kΩ to 4.7 kΩ to meet rise-time requirements (tr ≤ 120 ns).
How does the WP pin function on AT24C04D-STUM-T, and what happens if left unconnected?
When WP is tied to VCC, AT24C04D-STUM-T inhibits all write operations; when grounded, writes are enabled. If left unconnected, the internal strong pull-down biases WP to GND, enabling writes by default. However, Microchip recommends hard-wiring WP to a known state (VCC or GND) to prevent noise-induced glitches during system startup or ESD events.
Can AT24C04D-STUM-T be used in a 5 V system?
No, AT24C04D-STUM-T is rated for 1.7–3.6 V only. Applying 5 V to VCC exceeds its absolute maximum rating (4.1 V) and risks permanent damage. For 5 V systems, use Microchip's AT24C04C-SSHM-T (2.5–5.5 V) or implement level-shifting circuitry - never direct connection.
What is the memory page structure of AT24C04D-STUM-T, and why does it matter for write efficiency?
AT24C04D-STUM-T organizes its 512 bytes into 32 pages of 16 bytes each. Page writes allow up to 16 bytes to be programmed in a single self-timed cycle (≤5 ms), reducing I²C overhead versus 16 separate byte writes. Crossing page boundaries forces premature write completion - so proper address alignment is essential for optimal throughput in firmware update routines.
AT24C04D-STUM-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:
- Active
- 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:
- 450 ns
- Voltage - Supply:
- 1.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
AT24C04D-STUM-T FAQ
1.How can I place an order for AT24C04D-STUM-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C04D-STUM-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 AT24C04D-STUM-T reliable?
The price and inventory of AT24C04D-STUM-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C04D-STUM-T is usually 5 days.
3.What payment methods are accepted for AT24C04D-STUM-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C04D-STUM-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C04D-STUM-T?
AT24C04D-STUM-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C04D-STUM-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 AT24C04D-STUM-T?
For technical support, including AT24C04D-STUM-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C04D-STUM-T requirements.
6.How does Aetrix verify that AT24C04D-STUM-T is sourced from the original manufacturer or authorized distributors?
All AT24C04D-STUM-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 AT24C04D-STUM-T meets industry standards.
7.What is the process for return or replacement of AT24C04D-STUM-T?
All AT24C04D-STUM-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C04D-STUM-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 AT24C04D-STUM-T part is unused and in its original packaging.
Return procedure for AT24C04D-STUM-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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