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Microchip Technology 24LC32AFT-I/MNY
- Part No.:
- 24LC32AFT-I/MNY
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
24LC32AFT-I/MNY.pdf
- Description:
- IC EEPROM 32KBIT I2C 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,994
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Product details
Overview
24LC32AFT-I/MNY from Microchip Technology Inc. is a 32 Kbit I²C-compatible serial EEPROM organized as 4K × 8-bit memory, operating from 2.5V to 5.5V with industrial temperature range (–40°C to +85°C). It features hardware write-protect for the upper 1/4 array (C00h–FFFh), 32-byte page write buffer, and 400 kHz max clock frequency. Used in embedded systems for parameter storage, calibration data retention, and configuration backup.
For engineers reviewing the 24LC32AFT-I/MNY datasheet, 24LC32AFT-I/MNY pinout, 24LC32AFT-I/MNY application, or 24LC32AFT-I/MNY equivalent, key selection criteria include VCC min (2.5V), WP-enabled quarter-array protection, 5 ms max page write time, I²C bus timing compliance at 400 kHz, and TDFN-8 package footprint compatibility.
Technical Context
The 24LC32AFT-I/MNY implements a two-wire I²C interface with Schmitt-trigger inputs on SDA/SCL for noise immunity and slope-controlled outputs to suppress ground bounce. Its internal address counter supports current-address, random, and sequential read modes, while the 32-byte page buffer enables efficient burst writes without host-side buffering.
Write protection is implemented via the WP pin, which-when tied to VCC-disables writes only to addresses C00h–FFFh (16 Kbits), leaving lower 16 Kbits fully writable. The device uses an internal high-voltage generator for EEPROM programming and supports acknowledge polling to detect write cycle completion without fixed delays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 32 Kbit (4,096 × 8-bit) nonvolatile EEPROM array |
| VCC operating range | 2.5V to 5.5V - compatible with 3.3V and 5V logic domains |
| Max clock frequency | 400 kHz - supports high-speed I²C mode; 100 kHz below 2.5V (not applicable here) |
| Page write time | 5 ms max - determines minimum interval between page write commands |
| Write endurance | 1,000,000 erase/write cycles - ensures long-term reliability in frequent-update applications |
| Data retention | 200 years - guarantees data integrity over full product lifecycle without refresh |
| Standby current | 1 μA max (I-temp) - enables ultra-low-power operation in battery-backed systems |
Pinout & Package
24LC32AFT-I/MNY is housed in an 8-lead TDFN (Thin Dual Flat No-lead) package with wettable flanks, measuring 2 mm × 3 mm × 0.75 mm (max height), suitable for space-constrained PCB layouts and automated optical inspection (AOI).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Chip address input | LSB of 3-bit slave address; hardwired to VSS or VCC to configure I²C address (1010xxx) |
| A1 | Chip address input | Middle bit of slave address; enables up to eight devices on same I²C bus |
| A2 | Chip address input | MSB of slave address; required for multi-device addressing |
| VSS | Ground reference | Return path for all internal circuitry and I/O; must be low-impedance connection |
| SDA | Serial data I/O | Open-drain bidirectional bus line; requires external pull-up resistor (2 kΩ typical for 400 kHz) |
| SCL | Serial clock input | Master-generated clock synchronizing all data transfers; Schmitt-trigger input for noise rejection |
| WP | Hardware write-protect | Active-high control: VCC disables writes to upper 16 Kbits (C00h–FFFh); VSS enables full-array writes |
| VCC | Power supply | Primary supply rail (2.5–5.5V); powers EEPROM core, interface logic, and charge pump |
Key Features
| Feature | Design Value |
|---|---|
| Quarter-array hardware write-protect | WP pin disables writes only to addresses C00h–FFFh, preserving critical firmware or calibration data while allowing runtime updates to user-configurable regions |
| 32-byte page write buffer | Reduces I²C transaction overhead by enabling up to 32 bytes per Stop-condition-initiated write cycle, improving throughput vs. byte-write-only devices |
| Schmitt-trigger inputs & slope control | Eliminates false triggering from EMI or ringing on SDA/SCL lines and prevents ground bounce during output transitions, enhancing bus robustness in noisy environments |
| 1 μA max standby current (I-temp) | Enables integration into always-on, energy-harvesting, or battery-powered nodes where quiescent power directly impacts operational lifetime |
| 100% tested I²C timing compliance | Guarantees interoperability with standard I²C masters without custom timing adjustments or bus arbitration workarounds |
Applications
| Industrial Sensor Node | Medical Device Calibration |
|---|---|
Use Scenario: Remote environmental sensor collects temperature/humidity data hourly and stores local history for offline retrieval. IC Role / Device Role / Timing Role: Nonvolatile configuration and event-log storage; retains data across power loss without backup capacitor or supercapacitor. Use Value: 200-year data retention and 1M-cycle endurance ensure reliable logging over 10+ years of field deployment with daily writes. |
Use Scenario: Portable blood glucose meter stores factory calibration coefficients and user-specific offset values. IC Role / Device Role / Timing Role: Secure parameter storage with hardware write-protection preventing accidental overwrites of calibrated constants. Use Value: WP pin tied to VCC protects C00h–FFFh region containing calibration data, while lower 16 Kbits store user settings - eliminating need for software-based lock mechanisms. |
| Smart Energy Meter | Automotive Body Control Module |
Use Scenario: Electricity meter records tamper events, billing intervals, and firmware version history across mains power interruptions. IC Role / Device Role / Timing Role: High-reliability data logger interfacing directly to MCU via I²C; withstands wide temperature swings and conducted transients. Use Value: 4 kV ESD rating and –40°C to +85°C operation ensure stable performance in outdoor meter enclosures exposed to solar heating and lightning-induced surges. |
Use Scenario: BCM stores seat position presets, mirror angles, and lighting profiles for driver personalization. IC Role / Device Role / Timing Role: Parameter EEPROM accessed during vehicle power-up; must complete initialization before CAN bus activation. Use Value: 5 ms max page write time enables fast save of user preferences after adjustment, and 400 kHz I²C speed minimizes boot-time latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C32D-MAHM-T (Microchip) | Same 32 Kbit capacity, 2.5–5.5V VCC, but uses 1.8V-tolerant I²C interface and offers enhanced ESD (6 kV HBM); packaged in 8-lead SOIC. | SOIC-8 footprint requires PCB redesign vs. TDFN-8; higher ESD rating suits harsher industrial environments. | Select when board layout allows SOIC and higher ESD immunity is required; not drop-in due to package mismatch. |
| BR24G32FJ-WE2 (ROHM) | 32 Kbit I²C EEPROM with 1.7–5.5V operation, 1 MHz max clock, and built-in write-cycle endurance counter; offered in TSSOP-8. | TSSOP-8 has larger footprint and different thermal profile; 1 MHz speed enables faster bulk writes but demands stricter signal integrity. | Choose for higher-speed write throughput and integrated endurance monitoring; requires layout change and signal integrity validation. |
Compared with AT24C32D-MAHM-T and BR24G32FJ-WE2, the 24LC32AFT-I/MNY provides optimal balance of TDFN-8 space efficiency, proven 400 kHz timing margin, and quarter-array hardware write-protect - making it ideal for compact, cost-sensitive industrial and medical designs where pinout and protection granularity matter more than raw speed or extreme ESD rating.
Availability
24LC32AFT-I/MNY is available at Aetrix Electronics and suitable for industrial sensor nodes, medical calibration storage, smart energy meters, and automotive body control modules requiring stable component supply across extended production lifecycles.
Supply support for 24LC32AFT-I/MNY 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 24LC32AFT-I/MNY belongs to Microchip's legacy 24XX32AF serial EEPROM family, designed specifically for low-power, space-constrained embedded systems needing reliable, pin-efficient nonvolatile storage with hardware-level data protection.
FAQ
What is the minimum VCC voltage required for reliable operation of the 24LC32AFT-I/MNY?
The 24LC32AFT-I/MNY requires a minimum VCC of 2.5V for guaranteed operation across its full industrial temperature range (–40°C to +85°C). This distinguishes it from the 24AA32AF variant, which supports down to 1.7V. Operating below 2.5V may result in undefined behavior or failed write cycles.
How does the WP pin protect memory in the 24LC32AFT-I/MNY?
In the 24LC32AFT-I/MNY, tying the WP pin to VCC hardware-locks writes to the upper 1/4 of the memory array (addresses C00h–FFFh), while permitting full read access and unrestricted writes to the lower 3/4 (000h–BFFh). This enables secure storage of immutable calibration data alongside modifiable user settings.
Can the 24LC32AFT-I/MNY be used on the same I²C bus as other 24XX32AF-family devices?
Yes - the 24LC32AFT-I/MNY supports cascading up to eight devices on one I²C bus using its A0, A1, and A2 address pins. Each device must have a unique 3-bit chip address (1010xxx), allowing a total addressable space of 256 Kbits. The TDFN-8 package retains all three address pins.
What is the maximum write speed supported by the 24LC32AFT-I/MNY?
The 24LC32AFT-I/MNY supports I²C clock frequencies up to 400 kHz, enabling high-speed data transfer. Its 32-byte page write buffer allows up to 32 bytes to be written per self-timed cycle, with a maximum page write time of 5 ms - significantly faster than byte-by-byte writes.
Is the 24LC32AFT-I/MNY RoHS compliant and lead-free?
Yes, the 24LC32AFT-I/MNY is Pb-free and RoHS compliant, as confirmed in the official Microchip datasheet DS22184A. Its TDFN-8 package uses matte tin (Sn) plating per JEDEC standards, and marking includes the "3e" Pb-free designation per Microchip's packaging guidelines.
24LC32AFT-I/MNY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 32Kbit
- Memory Organization:
- 4K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (2x3)
24LC32AFT-I/MNY FAQ
1.How can I place an order for 24LC32AFT-I/MNY through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC32AFT-I/MNY 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 24LC32AFT-I/MNY reliable?
The price and inventory of 24LC32AFT-I/MNY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC32AFT-I/MNY is usually 5 days.
3.What payment methods are accepted for 24LC32AFT-I/MNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC32AFT-I/MNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC32AFT-I/MNY?
24LC32AFT-I/MNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC32AFT-I/MNY 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 24LC32AFT-I/MNY?
For technical support, including 24LC32AFT-I/MNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC32AFT-I/MNY requirements.
6.How does Aetrix verify that 24LC32AFT-I/MNY is sourced from the original manufacturer or authorized distributors?
All 24LC32AFT-I/MNY 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 24LC32AFT-I/MNY meets industry standards.
7.What is the process for return or replacement of 24LC32AFT-I/MNY?
All 24LC32AFT-I/MNY units undergo pre-shipment inspection (PSI). If there is an issue with 24LC32AFT-I/MNY, 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 24LC32AFT-I/MNY part is unused and in its original packaging.
Return procedure for 24LC32AFT-I/MNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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