Part Number: 24LC32AT-I/OT

Manufacturer: Microchip Technology

Description: IC EEPROM 32KBIT I2C SOT23-5

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Technical Specifications of 24LC32AT-I/OT

Datasheet  24LC32AT-I/OT datasheet
Category Integrated Circuits (ICs)
Family Memory
Manufacturer Microchip Technology
Packaging Tape & Reel (TR)
Part Status Active
Format – Memory EEPROMs – Serial
Memory Type EEPROM
Memory Size 32K (4K x 8)
Speed 400kHz
Interface I2C, 2-Wire Serial
Voltage – Supply 2.5 V ~ 5.5 V
Operating Temperature -40°C ~ 85°C (TA)
Package / Case SC-74A, SOT-753
Supplier Device Package SOT-23-5

24LC32AT-I/OT Introduction

A pioneer in the microcontroller and analog semiconductor industries, Microchip Technologies has released the 24LC32AT-I/OT, a serial I2C EEPROM (Electrically Erasable Programmable Read-Only Memory). The device has a maximum memory capacity of 4 kilobytes (KB), or 32Kbits. The 24LC32AT-I/OT will be discussed in detail, along with its capabilities, in this tutorial.

24LC32AT-I/OT Description

The 24XX32A(1) from Microchip Technologies is a 32-Kbit Electrically Erasable PROM. The memory chip uses a standard 2-wire serial interface and is laid out as a 4K x 8-bit block. Because of its low-voltage design can function at voltages as low as 1.7V and consumes only 1 A in sleep mode and 1 mA when active. The 24XX32A can also store up to 32 bytes per page in its memory. Address space of up to 256 Kb is possible with up to eight devices sharing a single bus with functional address lines.

24LC32AT-I/OT Features

The 24LC32AT-I/many OT’s useful characteristics make it a great option in various contexts. Among these characteristics are:

  • The device connects to the host microcontroller through an I2C interface for data exchange. This interface makes it possible to use a straightforward two-wire protocol for communication.
  • Battery-powered uses are possible due to the device’s minimal power consumption. It draws 1mA when in use and 1uA when idle.
  • The gadget can function from -40 degrees Celsius to +85 degrees Celsius, making it ideal for use in challenging industrial settings.
  • With a data retention time of over 200 years and a durability of over 1 million write cycles, this device has a high dependability grade.
  • The chip is offered in several packages, including SOIC, TSSOP, DFN, and SOT-23.

24LC32AT-I/OT Applications

Uses for the 24LC32AT-I/OT include, but are not limited to:

  • Engine control units, entertainment systems, and body control modules are all examples of automotive applications that could benefit from the device’s reliable and strong memory storage.
  • Data logging, process management, and equipment monitoring are just a few examples of industrial uses for this handy gadget.
  • Medical: The gadget can be used in medical monitors and diagnostic tools because of its ability to store sensitive patient information in memory safely.
  • Equipment for the Home and Office: The chip can be used in smart home gadgets, wearables, and remote controls because of its low power consumption and high reliability in memory storage.

Functional Description

The 24XX32A can send and receive data over a two-wire bus in both directions. Transmitters are devices that put data onto the bus while receivers take data off. The 24XX32A operates as a client on the bus, which requires a host device to provide the Serial Clock (SCL), manage access to the bus, and trigger Start and Stop conditions. The host device controls whether the mode is active; therefore, the host or the client might be the transmitter or the receiver.

● Data Valid (D)

For the state of the data line to represent legitimate data after a Start condition, it must remain steady for the duration of the clock signal’s high period. Information on the line must be updated during the clock’s low period. A single clock pulse represents one bit of information. The Start condition initiates a data transfer, and the Stop condition ends it. Between Start and Stop, the host device can send an endless (in theory) number of bytes of data (although only the last 32 will be stored when doing a write operation). When data is overwritten, it is done so according to the First-In-First-Out (FIFO) rule.

● Device Addressing

When a host device sends the Start condition, the first byte received is a control byte. A four-bit control code makes up the control byte. The 24XX32A has this set to the binary value of “1010” for reading and writing. The Chip Select bits are the following 3 bits of the control byte (A2, A1, A0). Up to eight 24XX32A devices can share a bus, and the Chip Choose bits are used to decide which one gets accessed when a command is issued. If you want a response from your device, you need to ensure the logic levels on the A2, A1, and A0 pins match the Chip Choose bits in the control byte. These three digits comprise the address’s LSB (Least Significant Bit).

The client address comprises the last three bits of the 4-bit control code. The address pins are unavailable in the SOT-23 package. The A1, A2, and A0 Chip Selects bits must all be zeroed out before the device may be addressed. The Read/Write (R/W) bit, located at the very end of the control byte, specifies which action will be taken. When the value is “1,” the user has chosen to do a read. When a value of 0 is entered, a write operation is chosen.


The 24LC32AT-I/OT is a powerful and versatile EEPROM that can supply dependable memory storage solutions for many uses. Industries as diverse as automotive, industrial, medical, and consumer electronics can all benefit from its low power consumption, high dependability, and broad temperature range.

Not only is it inexpensive and efficient, but its compact size, flexible packaging options, and straightforward communication protocol make it a desirable choice for designers and developers. To get your hands on this exceptional device, we recommend ordering from ICRFQ, a trusted supplier of high-quality electronic components known for their excellent products and outstanding customer service. Don’t wait any longer to enhance your project – order the 24LC32AT-I/OT today!

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