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Microchip Technology 24AA128T-I/MF
- Part No.:
- 24AA128T-I/MF
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
24AA128T-I/MF.pdf
- Description:
- IC EEPROM 128KBIT I2C 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,309
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Product details
Overview
24AA128T-I/MF from Microchip Technology Inc. is a 128 Kbit (16K × 8) I²C-compatible serial EEPROM with 1.7V–5.5V single-supply operation, 400 kHz max clock frequency, and industrial temperature range (–40°C to +85°C). It features 64-byte page write buffer, hardware write-protect (WP), Schmitt-trigger inputs, and >1 million erase/write cycles - deployed in embedded system configuration storage, sensor calibration data retention, and power-fail-safe parameter logging.
For engineers reviewing the 24AA128T-I/MF datasheet, 24AA128T-I/MF pinout, 24AA128T-I/MF application, or 24AA128T-I/MF equivalent, key selection criteria include VCC compatibility down to 1.7V, I²C bus timing compliance at 400 kHz, WP-controlled write protection, 8-lead SOIC (SN) package footprint, and cascading support for up to eight devices on one bus.
Technical Context
The 24AA128T-I/MF implements a two-wire I²C interface with slave address decoding via A0–A2 pins, supporting up to eight devices on a shared bus. Its internal architecture includes a 64-byte page latch, HV generator for EEPROM programming, and memory control logic enabling self-timed byte/page writes.
It uses Schmitt-trigger inputs on SDA/SCL for noise immunity and slope-controlled outputs to suppress ground bounce. Write-protect is implemented as a dedicated input (WP) sampled at the STOP bit, enabling hardware-level array lock without firmware intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 128 Kbit (16,384 × 8 bits); supports full random/sequential read across 0x0000–0x3FFF address space |
| VCC operating range | 1.7V to 5.5V; enables direct interfacing with 1.8V, 2.5V, 3.3V, and 5V microcontrollers without level shifters |
| Max I²C clock frequency | 400 kHz at VCC ≥ 2.5V; ensures compatibility with standard-mode I²C controllers in industrial MCU platforms |
| Page write buffer | 64 bytes; reduces write transaction overhead by up to 64× vs. byte-write mode for bulk configuration updates |
| Write endurance | 1,000,000 cycles per page; guarantees long-term reliability in firmware update or logging applications |
| Data retention | 200 years at +85°C; validated for mission-critical nonvolatile storage in unattended equipment |
| Standby current | 1 µA maximum (I-temp); minimizes quiescent power draw in battery-backed or energy-harvesting systems |
Pinout & Package
24AA128T-I/MF is packaged in an 8-lead SOIC (SN) - narrow body, 3.90 mm width, JEDEC MS-012AC compliant. Pin 1 is bottom-left corner when notch faces upward; leads are gull-wing, matte tin-plated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Chip address input | LSB of 3-bit slave address; hardwired to VSS/VCC to configure device address (0x50–0x57) |
| A1 | Chip address input | Middle bit of slave address; determines unique I²C address when multiple EEPROMs share bus |
| A2 | Chip address input | MSB of slave address; enables up to eight 24AA128T-I/MF devices on same I²C bus |
| VSS | Ground reference | Primary return path for all internal circuits; must be low-impedance connection to system GND plane |
| SDA | Serial data I/O | Open-drain bidirectional line; requires external pull-up resistor (2–10 kΩ depending on speed) |
| SCL | Serial clock input | Master-generated clock; rising edge samples data, falling edge allows data change |
| WP | Hardware write-protect | Active-high lock: tied to VCC disables all write operations while preserving read functionality |
| VCC | Power supply | Single 1.7–5.5V rail powers EEPROM core, interface, and HV generator; no separate VPP required |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | Functional down to 1.7V VCC - supports direct integration with 1.8V logic families and ultra-low-power MCUs |
| Noise-immune interface | Schmitt-trigger inputs + 50 ns spike suppression on SDA/SCL - eliminates false START/STOP detection in noisy industrial environments |
| Page write efficiency | 64-byte buffer enables single-command writes of configuration blocks (e.g., 64-byte MAC table or calibration matrix) |
| Hardware write security | WP pin provides physical, firmware-independent protection against accidental or malicious overwrites during field operation |
| Extended reliability | 200-year data retention at +85°C - validated for use in sealed enclosures without thermal derating |
Applications
| Industrial Sensor Node | Medical Device Calibration |
|---|---|
Use Scenario: Remote environmental sensor node with battery backup stores temperature/humidity calibration coefficients and last-known readings before power loss. IC Role / Device Role / Timing Role: Nonvolatile configuration and state storage; retains data across cold starts and brownouts. Use Value: Enables zero-latency resume after power recovery using factory-trimmed sensor offsets stored in 24AA128T-I/MF. | Use Scenario: Portable blood glucose meter stores user-specific calibration curves and usage history across thousands of test cycles. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter archive; WP pin prevents unauthorized recalibration. Use Value: Meets IEC 62304 Class B software safety requirements via hardware-enforced write protection in 24AA128T-I/MF. |
| Smart Energy Meter | Automotive Body Control Module |
Use Scenario: Utility-grade electricity meter logs tariff schedules, billing intervals, and firmware version metadata across 15+ year service life. IC Role / Device Role / Timing Role: Long-term event logging and secure firmware metadata storage. Use Value: 1M-cycle endurance and 200-year retention ensure compliance with ANSI C12.22 and DLMS/COSEM standards. | Use Scenario: BCM stores seat/mirror position presets, door lock configurations, and adaptive lighting profiles for end-user personalization. IC Role / Device Role / Timing Role: User preference storage with guaranteed integrity across vehicle battery disconnects. Use Value: 1.7V operation allows reliable write during cranking (battery dip to 1.8V), preventing profile loss in 24AA128T-I/MF. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC128-I/SN | Requires minimum 2.5V VCC; identical 400 kHz I²C timing and 64-byte page buffer | Not suitable for 1.8V systems; otherwise pin- and function-compatible with 24AA128T-I/MF | Select only if system VCC never drops below 2.5V and legacy 24LC128 qualification is required |
| AT24C128-10PU-2.7 | 100 kHz max clock at 2.7V; lacks Schmitt-trigger inputs and slope control; 400 kHz only at ≥4.5V | Lower noise immunity and reduced speed flexibility; not recommended for mixed-voltage or noisy industrial buses | Choose only for cost-sensitive, low-speed, fixed 5V designs where Microchip qualification is not mandated |
Compared with 24LC128-I/SN and AT24C128-10PU-2.7, the 24AA128T-I/MF uniquely supports 1.7V operation with full 400 kHz performance and integrated noise suppression - making it the only option qualified for robust, low-voltage, high-reliability embedded storage.
Availability
24AA128T-I/MF is available at Aetrix Electronics and suitable for industrial sensor nodes, medical device calibration storage, and smart energy metering requiring stable component supply across extended product lifecycles.
Supply support for 24AA128T-I/MF 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 24AA128T-I/MF belongs to Microchip's 24XX128 family of I²C EEPROMs, engineered specifically for low-power, wide-voltage-range nonvolatile storage in industrial, automotive, and medical applications demanding long-term data integrity.
FAQ
What is the minimum VCC voltage supported by the 24AA128T-I/MF?
The 24AA128T-I/MF operates down to 1.7V VCC across its full industrial temperature range (–40°C to +85°C). This enables direct interfacing with 1.8V microcontrollers and battery-powered systems experiencing brownout conditions. The device maintains full 400 kHz I²C functionality at 1.7V, unlike competing EEPROMs that throttle speed or disable operation below 2.5V.
Does the 24AA128T-I/MF support cascading with other I²C EEPROMs on the same bus?
Yes, the 24AA128T-I/MF supports cascading up to eight devices on a single I²C bus using its A0, A1, and A2 address inputs. Each device is assigned a unique 7-bit slave address (0x50–0x57) by hardwiring these pins to VSS or VCC. This allows expansion to 1 Mbit total addressable memory without additional address lines or bus arbitration logic.
How does the WP pin function on the 24AA128T-I/MF?
The WP (Write-Protect) pin on the 24AA128T-I/MF is a hardware-level enable/disable control for all write operations. When tied to VCC, writes to the entire memory array (0x0000–0x3FFF) are inhibited while reads remain fully functional. The pin is sampled at the STOP bit of each write command, providing deterministic, firmware-independent protection against accidental or malicious overwrites.
What is the page write capability of the 24AA128T-I/MF?
The 24AA128T-I/MF features a 64-byte page write buffer, allowing up to 64 bytes of data to be written in a single I²C transaction. This reduces bus overhead by up to 64× compared to byte-write mode and accelerates bulk configuration updates - for example, writing a complete 64-byte calibration table in one command instead of 64 separate writes.
Is the 24AA128T-I/MF RoHS compliant and qualified for automotive use?
The 24AA128T-I/MF is RoHS compliant and rated for industrial temperature (–40°C to +85°C), but it is not AEC-Q100 qualified. While the broader 24XX128 family includes AEC-Q100 variants (e.g., 24AA128T-E/MF), the "I" suffix in 24AA128T-I/MF explicitly denotes industrial grade. For automotive applications, designers must select the E-temp or automotive-qualified variant instead of the 24AA128T-I/MF.
24AA128T-I/MF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 128Kbit
- Memory Organization:
- 16K x 8
- 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-DFN-S (6x5)
24AA128T-I/MF FAQ
1.How can I place an order for 24AA128T-I/MF through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA128T-I/MF 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 24AA128T-I/MF reliable?
The price and inventory of 24AA128T-I/MF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24AA128T-I/MF is usually 5 days.
3.What payment methods are accepted for 24AA128T-I/MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA128T-I/MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA128T-I/MF?
24AA128T-I/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA128T-I/MF 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 24AA128T-I/MF?
For technical support, including 24AA128T-I/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA128T-I/MF requirements.
6.How does Aetrix verify that 24AA128T-I/MF is sourced from the original manufacturer or authorized distributors?
All 24AA128T-I/MF 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 24AA128T-I/MF meets industry standards.
7.What is the process for return or replacement of 24AA128T-I/MF?
All 24AA128T-I/MF units undergo pre-shipment inspection (PSI). If there is an issue with 24AA128T-I/MF, 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 24AA128T-I/MF part is unused and in its original packaging.
Return procedure for 24AA128T-I/MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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