Microchip Technology 24LC04T-I/SL100

Overview

24LC04T-I/SL100 from Microchip Technology is a 4 Kb I²C-compatible serial EEPROM organized as 512 × 8 bits, operating from 2.5 V to 5.5 V with 1 MHz max clock frequency and write cycle time of 5 ms (max). It features hardware write-protection via WP pin, supports byte/page write modes, and is rated for 1 million erase/write cycles with 200-year data retention.

For engineers reviewing the 24LC04T-I/SL100 datasheet, 24LC04T-I/SL100 pinout, 24LC04T-I/SL100 application, or 24LC04T-I/SL100 equivalent, key selection criteria include I²C address configuration (A0/A1 pins), endurance rating, voltage range compatibility with microcontroller I/O, and SOIC-8 package footprint constraints in space-constrained embedded designs.

Technical Context

This EEPROM implements a standard two-wire I²C interface with open-drain SDA/SCL pins, supports standard (100 kHz) and fast-mode (400 kHz) signaling, and includes an internal address counter for sequential read operations. The device uses CMOS technology and incorporates a write-protect feature that disables writes when the WP pin is driven high.

It operates across industrial temperature range (–40°C to +85°C), requires no external components for basic operation, and integrates an internal charge pump for reliable write operations across its full supply voltage range.

Key Specifications

Pinout & Package

24LC04T-I/SL100 is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package with 150 mil body width and standard gull-wing lead form. Pin spacing is 1.27 mm, and the package is RoHS-compliant and halogen-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Compared with AT24C04D-SSHM-T and BR24G04FJ-WE2, the 24LC04T-I/SL100 offers superior data retention (200 years), higher guaranteed endurance (1M cycles), and broader voltage tolerance - making it optimal for mission-critical, long-lifecycle embedded systems where data integrity is non-negotiable.

Availability

24LC04T-I/SL100 is available at Aetrix Electronics and suitable for smart metering, industrial automation, and automotive body electronics requiring stable component supply, long-term data integrity, and industrial-grade temperature performance.

Supply support for 24LC04T-I/SL100 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 is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory products for embedded control applications.

The 24LC04T-I/SL100 belongs to Microchip's legacy 24LCxx serial EEPROM family, designed specifically for reliable, low-power, I²C-based nonvolatile storage in cost-sensitive and space-constrained industrial and consumer systems.

FAQ

What is the I²C address range supported by the 24LC04T-I/SL100?

The 24LC04T-I/SL100 uses a 7-bit I²C slave address with base value 0x50. Pins A0 and A1 determine the two least-significant address bits, enabling up to four devices (0x50–0x53) on the same bus. No software address configuration is required - addressing is purely hardware-defined by these pins' logic states.

Does the 24LC04T-I/SL100 require an external crystal or clock source?

No, the 24LC04T-I/SL100 does not require any external timing components. It derives all timing from the I²C bus clock (SCL) provided by the master controller. Internal circuitry synchronizes read/write operations to incoming SCL edges, eliminating need for crystals, oscillators, or RC networks.

Can the 24LC04T-I/SL100 be used in a 3.3 V-only system without level shifting?

Yes, the 24LC04T-I/SL100 operates natively from 2.5 V to 5.5 V, so it functions correctly with 3.3 V V_CC and 3.3 V I²C bus levels. Its input thresholds are compatible with standard 3.3 V logic, and SDA/SCL pins tolerate 3.3 V signals directly - no level shifter is needed between it and a 3.3 V microcontroller.

How many bytes can be written in a single page write operation for the 24LC04T-I/SL100?

The 24LC04T-I/SL100 supports page write mode with a page size of 16 bytes. A single I²C write transaction can load up to 16 consecutive bytes into internal latches before initiating the internal write cycle. Exceeding this limit wraps to the start of the current page, risking unintended overwrites.

Is the 24LC04T-I/SL100 pin-compatible with other devices in the 24LCxx family?

Yes, the 24LC04T-I/SL100 shares identical SOIC-8 pinout and I²C interface behavior with other 24LCxx devices like 24LC02, 24LC08, and 24LC16, provided they use the same package variant. However, memory size, page size, and address bits differ - firmware must account for these variations even when swapping physically compatible parts.