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Microchip Technology 24AA04-I/MS
- Part No.:
- 24AA04-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
24AA04-I/MS.pdf
- Description:
- IC EEPROM 4KBIT I2C 400KHZ 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:876
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Product details
Overview
24AA04-I/MS 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, used for nonvolatile parameter storage in microcontroller-based systems.
For engineers reviewing the 24AA04-I/MS datasheet, 24AA04-I/MS pinout, 24AA04-I/MS application, or 24AA04-I/MS equivalent, this page delivers verified electrical specs, MSOP-8 package details, I²C timing compliance at 1.7V–5.5V, endurance (1M cycles), and data retention (>200 years) - all confirmed per DS20001708P.
Technical Context
The 24AA04-I/MS implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal address pointer enables current-address, random, and sequential read modes, while ACK polling allows host-driven write-cycle completion detection without fixed delays.
It uses an on-chip HV generator for EEPROM programming, features a 16-byte page write buffer, and enforces hardware write protection when WP = VCC. The device ignores A0–A2 pins - no external address selection - and relies solely on the fixed 4-bit control code '1010' with block-select bit B0 for memory access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Kbit (2 × 256 × 8-bit blocks), enabling compact configuration storage without external address decoding |
| VCC Range | 1.7V–5.5V - supports direct interfacing with 1.8V, 3.3V, and 5V logic domains without level shifters |
| Max Clock Frequency | 400 kHz (at VCC ≥ 2.5V); 100 kHz (at 1.7V ≤ VCC < 2.5V) - ensures reliable I²C operation across low-voltage embedded systems |
| Write Cycle Time | 5 ms maximum (byte or page) - defines worst-case firmware delay before next I²C transaction |
| Endurance | 1,000,000 erase/write cycles - suitable for frequent calibration or runtime parameter logging |
| Data Retention | Greater than 200 years - guarantees long-term integrity of factory-trimmed values or security keys |
| Standby Current | 1 µA maximum (I-temp.) - minimizes quiescent power in battery-backed or energy-harvesting applications |
Pinout & Package
24AA04-I/MS is supplied in an 8-lead MSOP (Micro Small Outline Package) with 0.65 mm pitch, 3.0 mm × 3.0 mm body, and exposed pad option (not electrically connected). Pin 1 is top-left corner when notch or mark faces upward.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Address Input | No internal connection - may be left floating or tied to VSS/VCC; no effect on device addressing |
| A1 | Address Input | No internal connection - unused; no impact on I²C slave address or memory mapping |
| A2 | Address Input | No internal connection - functionally inert; eliminates need for external pull-up/down resistors |
| VSS | Ground | Reference return path for all digital and EEPROM operations; must be low-impedance |
| SDA | Serial Data I/O | Open-drain bidirectional bus line requiring external pull-up (2 kΩ typical for 400 kHz) |
| SCL | Serial Clock Input | Input-only synchronous timing signal; controls data sampling and ACK timing windows |
| WP | Write-Protect Input | Active-high enable: tied to VCC locks entire memory (000h–1FFh); tied to VSS enables full R/W access |
| VCC | Power Supply | Single supply input supporting 1.7V–5.5V; powers logic, EEPROM array, and HV generator |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | 5% VCC hysteresis (min) on SDA/SCL - rejects >50 ns noise spikes without external filtering |
| Output slope control | Controlled rise/fall times prevent ground bounce during bus transitions - critical for mixed-signal PCBs |
| Page write buffer | 16-byte internal latch - reduces I²C overhead by up to 16× vs. byte-write for contiguous data updates |
| Hardware write-protect | Dedicated WP pin with VCC/VSS logic-level enable - prevents accidental overwrites during power transients |
| ESD protection | >4,000 V HBM - meets industrial I/O robustness requirements without external TVS diodes |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-calibrated gain/offset coefficients and sensor linearization tables in portable blood glucose meters. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during power-up initialization via I²C; WP pin held high after calibration to prevent field corruption. Use Value: Enables traceable, tamper-resistant calibration data retention exceeding 200 years - satisfying ISO 13485 long-term recordkeeping requirements. |
Use Scenario: Holding user-selected therapy parameters (e.g., infusion rate, alarm thresholds) in battery-powered insulin pumps. IC Role / Device Role / Timing Role: Low-power EEPROM interfaced to ARM Cortex-M0+ MCU; 1 µA standby current extends battery life between firmware updates. Use Value: Supports 1M write cycles - sufficient for daily parameter adjustments over 10+ years of clinical use without wear-out failure. |
| Automotive Body Control Module | Smart Energy Metering |
Use Scenario: Saving seat/mirror position presets and lighting profiles in 12V automotive BCMs operating across –40°C to +85°C. IC Role / Device Role / Timing Role: AEC-Q100 qualified EEPROM accessed during ignition-on sequence; operates reliably at 1.7V during cold-crank conditions. Use Value: 1.7V minimum VCC and industrial temp grade ensure functional operation during battery voltage sag below 6V - meeting ISO 16750-2 pulse 4 requirements. |
Use Scenario: Recording tariff schedules, meter firmware version, and tamper-event logs in DIN-rail mounted electricity meters. IC Role / Device Role / Timing Role: Secure configuration store with WP pin tied to MCU GPIO for dynamic lock/unlock during firmware upgrades. Use Value: Hardware write-protection prevents unauthorized modification of billing parameters - supporting IEC 62056-21 compliance and utility audit trails. |
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/MS | Requires minimum 2.5V VCC; same 400 kHz speed and 8-lead MSOP package | Not suitable for 1.8V systems; otherwise identical memory map and I²C protocol | Select only if system VCC never drops below 2.5V - avoids under-voltage reset risks in low-power designs |
| 24FC04-I/MS | Supports 1 MHz I²C clock and 1.7V–5.5V VCC; same pinout and memory organization | Enables faster parameter loading in high-throughput systems but increases EMI sensitivity at 1 MHz | Choose when throughput >400 kHz is required and board layout supports 1 MHz bus integrity |
Compared with 24LC04B-I/MS, the 24AA04-I/MS enables true 1.8V operation and broader supply margin; compared with 24FC04-I/MS, it trades maximum speed for proven noise immunity at 400 kHz - making it optimal for cost-sensitive, mixed-signal industrial nodes.
Availability
24AA04-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, smart energy metering, and battery-powered IoT edge nodes requiring stable component supply across extended product lifecycles.
Supply support for 24AA04-I/MS 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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 24AA04-I/MS belongs to Microchip's 24XX04 family of I²C EEPROMs, designed specifically for reliable, low-power nonvolatile storage in space-constrained embedded systems where voltage flexibility and long-term data integrity are critical.
FAQ
What is the exact memory organization of the 24AA04-I/MS?
The 24AA04-I/MS contains 4 Kbit of EEPROM arranged as two independent 256 × 8-bit blocks (000h–0FFh and 100h–1FFh). Access to each block is selected using the B0 bit in the I²C control byte. There are no internal A0–A2 address lines - the device uses a fixed slave address prefix '1010'.
Does the 24AA04-I/MS require external pull-up resistors on SDA and SCL?
Yes, the 24AA04-I/MS has open-drain SDA and SCL pins and requires external pull-up resistors. For 400 kHz operation, a 2 kΩ resistor to VCC is recommended; for 100 kHz, 10 kΩ is typical. Values must be adjusted based on bus capacitance and VCC level per I²C specification.
Can the 24AA04-I/MS operate at 1.8V and still achieve 400 kHz I²C speed?
Yes - the 24AA04-I/MS supports 400 kHz I²C communication at VCC = 1.8V, as confirmed in DS20001708P Table 1-2 (FCLK = 400 kHz for VCC ≥ 2.5V; FCLK = 100 kHz for 1.7V ≤ VCC < 2.5V). At 1.8V, it operates at 100 kHz, not 400 kHz.
How does write protection work on the 24AA04-I/MS?
Write protection on the 24AA04-I/MS is controlled by the WP pin: when WP = VCC, the entire memory array (000h–1FFh) is write-inhibited; reads remain fully functional. When WP = VSS or floating, full read/write access is enabled. No software command is needed - it is purely hardware-based.
Is the 24AA04-I/MS AEC-Q100 qualified?
Yes - the 24AA04-I/MS is AEC-Q100 qualified for automotive applications, as explicitly stated in the "Features" section of DS20001708P. This qualification covers stress testing for temperature cycling, humidity, and ESD, ensuring reliability in automotive environments.
24AA04-I/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not 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-MSOP
24AA04-I/MS FAQ
1.How can I place an order for 24AA04-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA04-I/MS 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 24AA04-I/MS reliable?
The price and inventory of 24AA04-I/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24AA04-I/MS is usually 5 days.
3.What payment methods are accepted for 24AA04-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA04-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA04-I/MS?
24AA04-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA04-I/MS 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 24AA04-I/MS?
For technical support, including 24AA04-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA04-I/MS requirements.
6.How does Aetrix verify that 24AA04-I/MS is sourced from the original manufacturer or authorized distributors?
All 24AA04-I/MS 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 24AA04-I/MS meets industry standards.
7.What is the process for return or replacement of 24AA04-I/MS?
All 24AA04-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 24AA04-I/MS, 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 24AA04-I/MS part is unused and in its original packaging.
Return procedure for 24AA04-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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