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Microchip Technology 24LC32AFT-E/MNY
- Part No.:
- 24LC32AFT-E/MNY
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
24LC32AFT-E/MNY.pdf
- Description:
- IC EEPROM 32KBIT I2C 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,889
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Product details
Overview
24LC32AFT-E/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 (−40°C to +85°C) rating and hardware write-protect for upper quarter-array (C00h–FFFh). It features 32-byte page write buffer, 5 ms max page write time, and Schmitt-trigger inputs for noise immunity-used in embedded system configuration storage and sensor calibration data retention.
For engineers reviewing the 24LC32AFT-E/MNY datasheet, 24LC32AFT-E/MNY pinout, 24LC32AFT-E/MNY application, or 24LC32AFT-E/MNY equivalent, key selection criteria include VCC min (2.5V), I²C clock compatibility (100/400 kHz), WP-enabled quarter-array protection, endurance (>1M cycles), and TDFN-8 package footprint constraints.
Technical Context
The 24LC32AFT-E/MNY implements a two-wire I²C slave interface with fixed 7-bit address prefix '1010' and three programmable chip-select bits (A2–A0), enabling up to eight devices on one bus. Its internal address counter supports current-address, random, and sequential read modes, with automatic rollover at FFFh.
Write operations use self-timed erase/write cycles with ACK polling support; page writes are limited to 32-byte boundaries and wrap on overflow. The WP pin samples at Stop bit to enable/disable write access to addresses C00h–FFFh-no effect if toggled mid-cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 32 Kbit (4,096 × 8-bit), single-block organization |
| VCC range | 2.5V to 5.5V - compatible with 3.3V and 5V systems; no operation below 2.5V |
| I²C clock | 100 kHz (VCC < 2.5V) or 400 kHz (VCC ≥ 2.5V) - determines maximum bus throughput |
| Page write buffer | 32 bytes - enables burst writes within physical page boundaries; crossing boundary causes wrap |
| Write-protect scope | Upper 1/4 array (C00h–FFFh) only - leaves lower 3/4 (000h–BFFh) fully writable when WP = VCC |
| Endurance & retention | >1,000,000 erase/write cycles; >200 years data retention - validated at 25°C per characterization |
| Standby current | 1 μA max (I-temp) - enables ultra-low-power battery-backed applications |
Pinout & Package
24LC32AFT-E/MNY is packaged in an 8-lead TDFN (2 mm × 3 mm, 0.5 mm pitch) with wettable flanks, RoHS-compliant and Pb-free. Pin 1 is A0 (top-left corner marked by beveled edge).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Chip address input | LSB of 3-bit device address; hardwired to VSS or VCC to select one of eight possible I²C addresses |
| A1 | Chip address input | Middle bit of device address; required for multi-device bus configuration |
| A2 | Chip address input | MSB of device address; sets unique slave address with A1/A0 |
| VSS | Ground reference | Return path for all internal circuits; must be low-impedance connection |
| WP | Write-protect control | Active-high logic: VCC enables quarter-array protection (C00h–FFFh); VSS disables protection |
| SCL | I²C clock input | Open-drain compatible; requires external pull-up; synchronizes all data transfers |
| SDA | I²C bidirectional data | Open-drain I/O; requires external pull-up; changes only during SCL low except for Start/Stop |
| VCC | Power supply | 2.5V–5.5V input; powers EEPROM core, interface, and internal HV generator for write operations |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs (SCL/SDA) | 0.05×VCC hysteresis - rejects fast transients and improves noise margin in noisy environments |
| Output slope control | Controlled SDA fall time (≤250 ns @ CB ≤100 pF) - eliminates ground bounce and EMI during switching |
| Hardware write-protect | Dedicated WP pin with sampling at Stop bit - prevents accidental overwrites without software overhead |
| Page write capability | 32-byte buffer with auto-incrementing address pointer - reduces I²C transaction count vs. byte writes |
| ESD protection | >4 kV HBM - meets industrial-level robustness requirements for board-level handling and field operation |
Applications
| Industrial Sensor Node | Medical Device Calibration |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients and runtime correction tables in portable blood glucose meters. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with guaranteed 200-year data retention and >1M write cycles for recalibration events. Use Value: Eliminates need for external backup power or supercapacitors; WP pin secures critical calibration data against firmware corruption. |
Use Scenario: Retaining patient-specific therapy parameters and usage logs in wearable ECG monitors. IC Role / Device Role / Timing Role: Low-power I²C slave storing encrypted settings and timestamped event history between battery charges. Use Value: 1 μA standby current extends battery life; 2.5V minimum VCC ensures operation across full Li-ion discharge curve (3.0V–4.2V). |
| Automotive Body Control Module | Smart Home Gateway |
Use Scenario: Saving user preferences (mirror position, seat memory, lighting profiles) in vehicle door modules. IC Role / Device Role / Timing Role: Industrial-temp EEPROM interfacing with MCU via 400 kHz I²C bus under engine-bay thermal stress. Use Value: −40°C to +85°C rating ensures reliability; TDFN-8 package saves PCB area in space-constrained modules. |
Use Scenario: Holding Wi-Fi credentials, OTA update metadata, and Zigbee network keys in residential IoT hubs. IC Role / Device Role / Timing Role: Secure configuration store with hardware write-protection isolating sensitive keys from application firmware. Use Value: WP pin blocks overwrite of cryptographic keys during untrusted firmware updates; 32-byte page writes optimize credential storage efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA32AFT-E/MNY | Lower VCC min (1.7V); identical pinout, timing, and memory map - but not rated for automotive temp | Preferred for battery-powered 1.8V systems (e.g., coin-cell IoT sensors); unsuitable where ambient exceeds +85°C | Select when 1.7V operation is mandatory and temperature stays ≤+85°C |
| AT24C32D-MAHM-T | Same 32Kbit capacity, 2.5–5.5V, I²C-compatible; different pinout (SOIC-8), no WP pin, 1 MHz max clock | Lacks hardware write-protect; requires software-based lock mechanisms; larger SOIC footprint | Choose when WP functionality is unnecessary and SOIC packaging is preferred for legacy layout reuse |
Compared with 24LC32AFT-E/MNY, the 24AA32AFT-E/MNY offers wider voltage flexibility but sacrifices high-temp operation, while the AT24C32D-MAHM-T trades WP protection and compact TDFN for higher speed and SOIC compatibility-making each suitable only for specific voltage, security, or mechanical constraints.
Availability
24LC32AFT-E/MNY is available at Aetrix Electronics and suitable for industrial sensor nodes, medical device calibration, automotive body control modules, and smart home gateways requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 24LC32AFT-E/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-E/MNY belongs to Microchip's 24XX32AF family of I²C serial EEPROMs, designed specifically for reliable, low-power nonvolatile storage in space-constrained embedded systems where write endurance, data retention, and noise-immune communication are critical.
FAQ
What is the minimum supply voltage required for 24LC32AFT-E/MNY operation?
The 24LC32AFT-E/MNY requires a minimum VCC of 2.5V for guaranteed operation across its full industrial temperature range (−40°C to +85°C). Operation below 2.5V is not supported-unlike the 24AA32A variant, which operates down to 1.7V. This 2.5V threshold ensures proper internal charge pump function for write operations and stable I²C timing compliance at 400 kHz.
Does 24LC32AFT-E/MNY support multi-device I²C bus configurations?
Yes, the 24LC32AFT-E/MNY supports up to eight devices on a single I²C bus using its three hardware address pins (A0, A1, A2). Each device is assigned a unique 7-bit slave address based on the binary combination of these pins, allowing contiguous addressing up to 256 Kbits. The TDFN-8 package retains all three address pins, unlike the SOT-23 variant.
How does the Write-Protect (WP) pin function on 24LC32AFT-E/MNY?
The WP pin on 24LC32AFT-E/MNY is sampled at the Stop bit of each write command and enables hardware-level protection for the upper quarter of memory (addresses C00h–FFFh) when pulled high to VCC. Read operations remain fully functional regardless of WP state. Protection is enforced at the hardware level-no firmware intervention is needed-and is immune to software crashes or glitches.
What is the maximum page write size for 24LC32AFT-E/MNY?
The 24LC32AFT-E/MNY has a fixed 32-byte page write buffer. Page writes must remain within a single physical page boundary (i.e., addresses aligned to 0x00, 0x20, 0x40, etc.). Attempting to cross a boundary causes wraparound within the same page-not continuation into the next page-so application firmware must validate address alignment before initiating multi-byte writes.
Is 24LC32AFT-E/MNY compatible with standard I²C protocols and controllers?
Yes, the 24LC32AFT-E/MNY is fully compliant with standard I²C protocol specifications, including Start/Stop conditions, ACK/NACK signaling, and 7-bit addressing. It supports both 100 kHz and 400 kHz clock rates depending on VCC level and meets timing requirements for THD:STA, TSU:DAT, and TAA across its rated temperature and voltage ranges-ensuring interoperability with all standard I²C masters.
24LC32AFT-E/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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (2x3)
24LC32AFT-E/MNY FAQ
1.How can I place an order for 24LC32AFT-E/MNY through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC32AFT-E/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-E/MNY reliable?
The price and inventory of 24LC32AFT-E/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-E/MNY is usually 5 days.
3.What payment methods are accepted for 24LC32AFT-E/MNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC32AFT-E/MNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC32AFT-E/MNY?
24LC32AFT-E/MNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC32AFT-E/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-E/MNY?
For technical support, including 24LC32AFT-E/MNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC32AFT-E/MNY requirements.
6.How does Aetrix verify that 24LC32AFT-E/MNY is sourced from the original manufacturer or authorized distributors?
All 24LC32AFT-E/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-E/MNY meets industry standards.
7.What is the process for return or replacement of 24LC32AFT-E/MNY?
All 24LC32AFT-E/MNY units undergo pre-shipment inspection (PSI). If there is an issue with 24LC32AFT-E/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-E/MNY part is unused and in its original packaging.
Return procedure for 24LC32AFT-E/MNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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