Microchip Technology 24LC024H-E/SN

Overview

24LC024H-E/SN from Microchip Technology Inc. is a 2 Kbit I²C-compatible serial EEPROM organized as 256 × 8-bit memory, operating from 2.5V to 5.5V with 1 MHz clock support in industrial and automotive temperature ranges (–40°C to +125°C). It features hardware write protection for the upper half-array (80h–FFh), 16-byte page write buffer, and Schmitt-trigger inputs for noise immunity. It is used in embedded systems for storing calibration data, configuration parameters, and device identity in automotive control modules.

For engineers reviewing the 24LC024H-E/SN datasheet, 24LC024H-E/SN pinout, 24LC024H-E/SN application, or 24LC024H-E/SN equivalent, key selection criteria include VCC range compatibility (2.5V–5.5V), 1 MHz I²C timing compliance, WP-enabled half-array protection, endurance (1 million cycles), and TSSOP-8 package footprint suitability for space-constrained automotive PCBs.

Technical Context

The 24LC024H-E/SN implements a two-wire I²C slave interface with fixed 7-bit address prefix '1010' and three programmable chip-select bits (A0–A2), enabling up to eight devices on one bus. Its internal address pointer auto-increments during sequential reads and wraps from FFh to 00h.

Write operations are self-timed with a maximum 5 ms cycle time; byte and page writes both trigger internal erase-before-write sequences. Hardware write protection is activated only when WP = VCC, locking addresses 80h–FFh - no software lock or status register is involved.

Key Specifications

Pinout & Package

24LC024H-E/SN is supplied in an 8-pin TSSOP package (3.0 mm × 4.4 mm, 0.65 mm pitch), RoHS-compliant and Pb-free. Pin 1 is A0; pin 4 is VSS; pin 5 is SDA; pin 6 is SCL; pin 7 is WP; pin 8 is VCC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C02D-SSHM-T and BR24G02FJ-3GE2, the 24LC024H-E/SN provides deterministic, pin-controlled hardware write protection ideal for safety-critical automotive use - eliminating firmware dependencies and reducing certification effort for locked memory regions.

Availability

24LC024H-E/SN is available at Aetrix Electronics and suitable for automotive control units, industrial programmable logic controllers, and medical infusion pumps requiring stable component supply across extended temperature and long product lifecycles.

Supply support for 24LC024H-E/SN 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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and nonvolatile memory solutions for embedded control applications.

The 24LC024H-E/SN belongs to Microchip's automotive-qualified serial EEPROM product line, designed specifically for robust, low-power, I²C-based configuration storage in harsh environments where data integrity and long-term reliability are mandatory.

FAQ

What is the minimum VCC required for reliable operation of the 24LC024H-E/SN?

The 24LC024H-E/SN requires a minimum VCC of 2.5V for full specification compliance, including 1 MHz I²C operation and guaranteed write functionality. Operation below 2.5V is not characterized - unlike the 24AA024H variant, the 24LC024H-E/SN does not support 1.7V operation. The internal voltage detector disables write cycles if VCC drops below ~1.5V to prevent data corruption.

How does the WP pin function on the 24LC024H-E/SN, and what memory region does it protect?

On the 24LC024H-E/SN, the WP pin is a hardware write-protect enable: when tied to VCC, it permanently locks write access to memory addresses 80h through FFh (the upper 128 bytes); when tied to VSS, full array write capability is restored. This protection is independent of I²C commands and remains active even during power transitions - a key feature for safeguarding bootloader configuration data.

Can the 24LC024H-E/SN be used interchangeably with the 24AA024H in a design?

No - the 24LC024H-E/SN and 24AA024H are not interchangeable due to differing VCC ranges (2.5V–5.5V vs. 1.7V–5.5V) and maximum clock frequencies (1 MHz vs. 400 kHz). Using the 24LC024H-E/SN in a 1.8V system will cause functional failure, and substituting the 24AA024H in a 1 MHz design violates AC timing specifications. Both share identical pinout and basic I²C protocol but differ in electrical ratings.

What is the page size and maximum page write length supported by the 24LC024H-E/SN?

The 24LC024H-E/SN supports a 16-byte page write buffer. A single page write operation can transfer up to 16 bytes starting from any address aligned to a 16-byte boundary (e.g., 00h, 10h, 20h…). Attempting to cross a page boundary causes wraparound within the same physical page - software must ensure write addresses and byte counts stay within the current 16-byte boundary to avoid unintended overwrites.

Does the 24LC024H-E/SN support I²C clock stretching or multi-master arbitration?

No - the 24LC024H-E/SN is a pure I²C slave with no clock stretching capability. It relies entirely on the master to control SCL timing and manage bus arbitration. During internal write cycles, the device stops acknowledging I²C addresses until the 5 ms self-timed operation completes - this is detected via acknowledge polling, not clock stretching. Multi-master systems must implement external arbitration logic.