24LC32AT-E/OT Microchip Integrated Circuit (SOT23 (5-Pin)) In Stock
Microchip 24LC32AT-E/OT is a 32Kbit (4KB) I2C serial EEPROM in a compact 5-pin SOT-23 package with up to 400kHz clock, 1,000,000 write/erase endurance cycles, and 200-year data retention. It offers reliable non-volatile storage for configuration and calibration data. Available worldwide with fast shipping.
- Manufacturer
- Microchip
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- 24LC32AT-E/OT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.4129(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 32Kbit (4KB) I2C EEPROM with 400kHz Fast-mode I2C interface enables simple 2-wire integration with microcontrollers at clock frequencies up to 0.4MHz
- 1,000,000 write/erase cycle endurance and 200-year data retention make it ideal for reliable long-term configuration and calibration data storage
- Ultra-compact 5-pin SOT-23 package minimizes PCB footprint for wearable, IoT sensor, and space-constrained embedded designs
- RoHS-compliant lead-free construction (JESD-609 e3) with I2C address byte 1010000R supports up to 8 devices on a shared 2-wire bus
Applications
The 24LC32AT-E/OT is commonly used in IoT sensor nodes, wearable devices, and embedded microcontroller systems requiring compact non-volatile storage for firmware configuration, factory calibration constants, and user preferences over an I2C bus. It is also deployed in industrial meter logging, medical device parameterization, and consumer electronics where the 5-pin SOT-23 package saves PCB space while delivering 32Kbits of reliable EEPROM at 400kHz communication speed.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-23-5 |
| Factory Lead Time | 12Weeks |
| YTEOL | 8 |
| Clock Frequency-Max (fCLK) | 0.4MHz |
| Data Retention Time-Min | 200 |
| Endurance | 1000000 Write/Erase Cycles |
| I2C Control Byte | 1010000R |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e3 |
| Memory Density | 32768bit |
| Memory IC Type | EEPROM |
| Memory Width | 8 |
| Number of Functions | 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 | TSOP5/6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Parallel/Serial | SERIAL |
| Peak Reflow Temperature (Cel) | 260 |
| Programming Voltage | 5V |
| Qualification Status | Not Qualified |
| Serial Bus Type | I2C |
| Standby Current-Max | 0.000005A |
| Supply Current-Max | 0.003mA |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Write Cycle Time-Max (tWC) | 5ms |
| Write Protection | HARDWARE |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.32.00.51 |
| Country of Origin | Malaysia, Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for 24LC32AT-E/OT:
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Frequently Asked Questions
What storage capacity and write endurance does the 24LC32AT-E/OT offer for embedded non-volatile storage?
The 24LC32AT-E/OT provides 32Kbits (4,096 bytes) of non-volatile EEPROM storage with 1,000,000 write/erase cycle endurance per byte location. This endurance level supports frequent data logging or parameter updates without wear-out concerns over typical product lifetimes. Combined with a 200-year data retention specification, it is suitable for factory calibration data, user preferences, and firmware configuration in embedded microcontroller applications.
How does the 24LC32AT-E/OT communicate with a host microcontroller and how many devices can share one bus?
The 24LC32AT-E/OT uses a 2-wire I2C interface with a maximum clock frequency of 400kHz (Fast-mode I2C), compatible with the I2C control byte address 1010000R. Up to 8 devices from the 24LC32A family can be connected on a single I2C bus by configuring the 3 hardware address pins, enabling up to 32KB total addressable EEPROM per I2C bus segment in multi-device embedded designs.
For a compact wearable design, why is the 5-pin SOT-23 package of the 24LC32AT-E/OT advantageous over SOIC-8?
The 24LC32AT-E/OT in SOT-23-5 package occupies approximately 5 mm² of PCB area versus the 20 mm² or more required by an SOIC-8 package. For wearable devices and miniaturized IoT sensors where board space is at a premium, this 4x footprint reduction is significant. The 5-pin SOT-23 provides all required I2C bus connections (SDA, SCL, address pins, power) in a surface mount package compatible with standard automated assembly processes.
How long can the 24LC32AT-E/OT retain stored data without power and what does this mean for system design?
The 24LC32AT-E/OT is specified for a minimum data retention time of 200 years at room temperature, meaning stored configuration and calibration data will remain valid throughout the product's entire service life without requiring battery backup or refresh cycles. This exceeds typical product lifetimes of 10 to 20 years and eliminates the need for periodic EEPROM scrubbing, simplifying firmware design for industrial meters, medical devices, and consumer electronics.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.4620 | $0.46 |
| 1000+ | $0.4500 | $450.00 |
| 5000+ | $0.4200 | $2100.00 |
| 48000+ | $0.4129 | $19818.72 |
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