24LC32AF-I/P Microchip Integrated Circuit (Dual-In-Line Packages) In Stock
The 24LC32AF-I/P is a 32 Kbit I2C serial EEPROM from Microchip with quarter-array write-protect, 400 kHz fast-mode operation, 1,000,000 write/erase cycle endurance, and 200-year data retention, packaged in an 8-pin DIP for breadboard and through-hole PCB designs. It suits embedded systems requiring non-volatile configuration or calibration storage with hardware write protection.
- Manufacturer
- Microchip
- Package
- Dual-In-Line Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- 24LC32AF-I/P Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.4311(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 32 Kbit (4 KB) storage capacity with quarter-array write-protect hardware pin for flexible memory region protection
- 400 kHz I2C fast-mode interface supports rapid data transfers in microcontroller-based embedded systems
- 1,000,000 write/erase cycle endurance and 200-year data retention ensure long-term reliability in configuration storage applications
- 8-pin DIP package enables direct breadboard prototyping and through-hole PCB assembly without soldering adapters
Applications
The 24LC32AF-I/P is widely used in embedded systems for storing non-volatile configuration parameters, calibration coefficients, and firmware settings accessed via an I2C bus at up to 400 kHz from a microcontroller or SoC. Its quarter-array write-protect feature and 1,000,000-cycle endurance make it particularly suitable for industrial sensors, consumer appliances, and IoT edge devices that require infrequent but reliable writes to a protected region of EEPROM memory.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | PDIP-8 |
| Factory Lead Time | 8Weeks |
| YTEOL | 8 |
| Clock Frequency-Max (fCLK) | 0.4MHz |
| Data Retention Time-Min | 200 |
| Endurance | 1000000 Write/Erase Cycles |
| I2C Control Byte | 1010DDDR |
| JESD-30 Code | R-PDIP-T8 |
| JESD-609 Code | e3 |
| Memory Density | 32768bit |
| Memory IC Type | EEPROM |
| Memory Width | 8 |
| Number of Functions | 1 |
| Number of Ports | 1 |
| Number of Words | 4096words |
| Number of Words Code | 4000 |
| Operating Mode | SYNCHRONOUS |
| Organization | 4KX8 |
| Output Characteristics | OPEN-DRAIN |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP8,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Parallel/Serial | SERIAL |
| Programming Voltage | 5V |
| Qualification Status | Not Qualified |
| Screening Level | TS 16949 |
| Serial Bus Type | I2C |
| Standby Current-Max | 0.000001A |
| Supply Current-Max | 0.003mA |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Write Cycle Time-Max (tWC) | 5ms |
| Write Protection | HARDWARE |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.32.00.51 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for 24LC32AF-I/P:
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Frequently Asked Questions
How does the 24LC32AF-I/P's quarter-array write-protect feature help protect firmware calibration data in an embedded sensor design?
The quarter-array write-protect of the 24LC32AF-I/P allows a hardware WP pin to protect a selectable quarter of the 32 Kbit (4 KB) array, which can hold factory calibration coefficients or critical firmware parameters that must survive accidental write commands from the host microcontroller. This hardware protection is independent of software, so even a firmware bug or reset condition that issues a rogue I2C write cycle cannot corrupt the protected 8 Kbit memory region, making the part well suited for safety-relevant industrial sensors and calibrated measurement instruments.
What I2C clock frequency does the 24LC32AF-I/P support, and how does that affect data throughput when writing configuration blocks?
The 24LC32AF-I/P supports an I2C clock frequency up to 400 kHz (fast mode), which allows transferring a full 32-byte page write in under 1 ms, enabling rapid sequential page writes during system initialization or firmware update sequences. At 400 kHz, the effective throughput for sequential byte writes is approximately 40 kbps after accounting for I2C address and acknowledge overhead, which is sufficient for writing kilobytes of configuration data in tens of milliseconds from a 3.3 V or 5 V microcontroller system.
How many write cycles can the 24LC32AF-I/P endure, and what logging or wear-leveling strategy is recommended for high-frequency writes?
The 24LC32AF-I/P is rated for a minimum of 1,000,000 write/erase cycles per byte location, which is adequate for infrequent configuration updates but may be exhausted in fewer than 3 years if a single byte is written once per minute. For applications that log sensor data or event counters at high frequency, a simple wear-leveling strategy such as cycling writes across multiple 32-byte pages within the 4 KB array can distribute erase wear and extend the effective EEPROM lifetime well beyond 1,000,000 total cycles on any single address.
When is the 8-pin DIP package of the 24LC32AF-I/P more practical than an SOIC-8 variant for prototyping and small-run production?
The 8-pin DIP package of the 24LC32AF-I/P fits directly into a standard 0.300 inch (7.62 mm) row-spacing breadboard or DIP socket, eliminating the need for an SMT-to-DIP adapter during prototyping and firmware development. For small production runs of fewer than a few hundred units, through-hole soldering of the DIP-8 is often faster and less prone to tombstoning or solder-bridging defects compared to hand-soldering the SOIC-8 variant with 1.27 mm pitch pads, reducing assembly cost and rework time in low-volume manufacturing.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.6000 | $0.60 |
| 10+ | $0.5960 | $5.96 |
| 25+ | $0.5070 | $12.68 |
| 60+ | $0.4900 | $29.40 |
| 120+ | $0.4800 | $57.60 |
| 2880+ | $0.4311 | $1241.48 |
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