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Microchip Technology 24AA04T-I/SN
- Part No.:
- 24AA04T-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24AA04T-I/SN.pdf
- Description:
- IC EEPROM 4KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,436
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Product details
Overview
24AA04T-I/SN from Microchip Technology Inc. is a 4-Kbit I²C-compatible serial EEPROM organized as two 256 × 8-bit blocks, operating from 1.7V to 5.5V with 400 kHz max clock frequency, 1 µA standby current, and industrial temperature range (–40°C to +85°C). It supports page writes up to 16 bytes and hardware write-protection via the WP pin for embedded system configuration storage.
For engineers reviewing the 24AA04T-I/SN datasheet, 24AA04T-I/SN pinout, 24AA04T-I/SN application, or 24AA04T-I/SN equivalent, this device is selected for low-voltage, noise-immune nonvolatile memory in space-constrained industrial controllers, sensor nodes, and power management ICs where I²C bus compatibility, 1 million write cycles, and >200-year data retention are critical.
Technical Context
The 24AA04T-I/SN implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress ground bounce and bus noise. Its internal address pointer enables current-address, random, and sequential read modes, while ACK polling allows host synchronization during self-timed 5 ms write cycles.
Memory organization uses block-select bit B₀ in the control byte to access either of two 256-word blocks; A0–A2 pins are unconnected and may be left floating. Write protection is implemented via a dedicated WP input that disables all write operations when pulled high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Kbit (2 × 256 × 8-bit blocks), enabling compact firmware parameter storage without external address latches |
| VCC Range | 1.7V–5.5V - supports direct connection to Li-ion battery rails, 3.3V logic, and legacy 5V systems |
| Max Clock Frequency | 400 kHz at VCC ≥ 2.5V - compatible with standard-mode I²C peripherals and microcontrollers |
| Page Write Buffer | 16-byte buffer - reduces I²C transaction count by up to 16× versus byte-write for contiguous data updates |
| Write Cycle Time | 5 ms maximum - defines minimum inter-write interval; ACK polling enables precise host timing control |
| Data Retention | >200 years at +85°C - ensures long-term reliability in unattended industrial deployments |
| Endurance | 1,000,000 erase/write cycles - supports frequent calibration or logging in field-upgradable devices |
Pinout & Package
24AA04T-I/SN is packaged in an 8-lead narrow SOIC (SN) with 3.90 mm body width and 1.27 mm pitch. Pin 1 is bottom-left corner (marking dot adjacent), with standard SOIC orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Not connected | No internal bond; may be left floating, tied to VSS, or tied to VCC without functional impact |
| A1 | Not connected | No internal bond; no effect on addressing or operation |
| A2 | Not connected | No internal bond; eliminates need for external pull-up/down resistors |
| VSS | Ground reference | Primary return path for I²C bus and internal circuitry; must be low-impedance |
| SDA | Serial data I/O | Open-drain bidirectional line requiring external pull-up (2–10 kΩ); carries addresses, commands, and data |
| SCL | Serial clock input | Input-only synchronous clock; host-generated; determines data transfer rate and timing margins |
| WP | Write-protect control | Active-high enable: tied to VCC locks entire 000–1FF address space against writes; tied to VSS enables full read/write |
| VCC | Power supply | Single 1.7–5.5V rail powers EEPROM core and I/O; no separate VIO required |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation down to 1.7V | Enables direct integration into battery-powered IoT sensors and energy-harvesting systems without level-shifting |
| Schmitt-trigger inputs on SDA/SCL | Rejects bus noise up to 5% VCC hysteresis, improving robustness in electrically noisy industrial environments |
| Output slope control | Prevents ground bounce-induced glitches during fast I²C transitions, eliminating need for external series resistors |
| Hardware write-protection via WP pin | Provides tamper-resistant configuration lock without software intervention or firmware overhead |
| 16-byte page write buffer | Reduces I²C bus occupancy by minimizing START/STOP sequences during multi-byte updates |
Applications
| Industrial PLC Configuration Storage | Smart Sensor Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping, scaling factors, and alarm thresholds in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during boot and runtime via I²C; retains values across power cycles. Use Value: Eliminates manual DIP-switch setup and enables remote firmware-based calibration updates without hardware changes. | Use Scenario: Holding factory-trimmed offset/gain coefficients and temperature compensation tables in MEMS pressure sensors. IC Role / Device Role / Timing Role: Read-once-at-boot data source; accessed only during sensor initialization sequence. Use Value: Achieves ±0.1% measurement accuracy without requiring precision external references or recalibration in field. |
| Power Supply Sequencing Controller | Medical Device Usage Log |
Use Scenario: Managing startup/shutdown timing sequences and voltage-rail enable states in multi-rail DC/DC converter modules. IC Role / Device Role / Timing Role: Persistent state machine memory storing last-known power state and fault history. Use Value: Ensures safe, repeatable power sequencing after brownouts or unexpected shutdowns without external supervision. | Use Scenario: Recording cumulative operational hours, sterilization cycles, and error events in portable diagnostic equipment. IC Role / Device Role / Timing Role: Incremental log storage updated after each clinical session; accessed only by service tools. Use Value: Supports regulatory compliance (IEC 62304) with auditable, tamper-evident usage history independent of main MCU flash. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC04B-I/SN | Requires minimum 2.5V VCC; same 400 kHz speed and 16-byte page buffer; identical SOIC-8 package and pinout | Limited to 2.5–5.5V systems; not suitable for sub-2.5V battery operation | Select when operating exclusively above 2.5V and cost sensitivity outweighs low-voltage flexibility |
| AT24C04-PU | Same 4-Kbit size and I²C interface; requires 1.8V min VCC; lacks WP pin - write protection implemented via software address locking | No hardware write-protect; relies on firmware integrity for configuration security | Choose when board-level WP signal routing is unavailable and software-managed protection suffices |
Compared with 24LC04B-I/SN, the 24AA04T-I/SN enables true single-cell Li-ion (2.7–4.2V) and coin-cell (1.7–3.0V) operation; compared with AT24C04-PU, its dedicated WP pin provides deterministic, hardware-enforced write lockdown independent of MCU firmware state.
Availability
24AA04T-I/SN is available at Aetrix Electronics and suitable for industrial PLCs, smart sensors, and medical diagnostics equipment requiring stable component supply, long-term obsolescence planning, and RoHS-compliant sourcing.
Supply support for 24AA04T-I/SN 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 Inc. is a leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 24AA04T-I/SN belongs to Microchip's 24XX04 family of serial EEPROMs, designed specifically for reliable, low-power nonvolatile data storage in resource-constrained embedded systems where I²C bus simplicity and extended data retention are essential.
FAQ
What is the minimum operating voltage for the 24AA04T-I/SN?
The 24AA04T-I/SN operates down to 1.7V, making it suitable for single-cell lithium batteries and ultra-low-power applications. This is confirmed in the Electrical Characteristics table (DS20001708P, page 3), where VCC min = 1.7V for Industrial temperature range. Operation below 1.7V is not guaranteed and may result in data corruption or communication failure.
Does the 24AA04T-I/SN require external pull-up resistors on SDA and SCL lines?
Yes, the 24AA04T-I/SN requires external pull-up resistors on both SDA and SCL because these pins are open-drain. Typical values are 10 kΩ for 100 kHz operation and 2 kΩ for 400 kHz, as specified in Section 2.2 of the datasheet. Failure to install pull-ups will prevent I²C communication.
How does the WP pin function on the 24AA04T-I/SN?
When the WP pin on the 24AA04T-I/SN is tied to VCC, all write operations to the entire memory array (addresses 000–1FF) are inhibited; reads remain fully functional. When tied to VSS, normal read/write operation is enabled. This hardware-level protection is active regardless of I²C command state.
What is the maximum number of write cycles supported by the 24AA04T-I/SN?
The 24AA04T-I/SN guarantees 1,000,000 erase/write cycles per memory location under typical conditions (+25°C, 5.5V), as stated in Table 1-2 (Parameter 18, Endurance) of DS20001708P. This endurance rating applies to both byte and page write modes.
Can the 24AA04T-I/SN be used in automotive applications?
No - the 24AA04T-I/SN is rated for Industrial temperature range (–40°C to +85°C) and is not AEC-Q100 qualified. While the broader 24XX04 family includes AEC-Q100 qualified variants (e.g., 24AA04T-E/SN), the "I" suffix in 24AA04T-I/SN explicitly denotes Industrial grade, not Automotive.
24AA04T-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 4Kbit
- Memory Organization:
- 256 x 8 x 2
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
24AA04T-I/SN FAQ
1.How can I place an order for 24AA04T-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA04T-I/SN 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 24AA04T-I/SN reliable?
The price and inventory of 24AA04T-I/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24AA04T-I/SN is usually 5 days.
3.What payment methods are accepted for 24AA04T-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA04T-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA04T-I/SN?
24AA04T-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA04T-I/SN 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 24AA04T-I/SN?
For technical support, including 24AA04T-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA04T-I/SN requirements.
6.How does Aetrix verify that 24AA04T-I/SN is sourced from the original manufacturer or authorized distributors?
All 24AA04T-I/SN 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 24AA04T-I/SN meets industry standards.
7.What is the process for return or replacement of 24AA04T-I/SN?
All 24AA04T-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24AA04T-I/SN, 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 24AA04T-I/SN part is unused and in its original packaging.
Return procedure for 24AA04T-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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