Microchip Technology 24VL024HT/ST

Overview

24VL024HT/ST from Microchip Technology Inc. is a 2 Kbit I²C-compatible serial EEPROM organized as 256 × 8-bit memory, operating from 1.5V to 3.6V with 400 μA max active current and 1 μA max standby current. It features hardware write-protection for the upper half-array (80h–FFh), Schmitt-trigger inputs for noise immunity, and page-write capability for up to 16 bytes per cycle. It is used in low-power embedded systems for parameter storage, calibration data retention, and configuration backup.

For engineers reviewing the 24VL024HT/ST datasheet, 24VL024HT/ST pinout, 24VL024HT/ST application, or 24VL024HT/ST equivalent, this page delivers verified electrical specs, validated package mapping (TSSOP-8), confirmed I²C timing compliance at 100/400 kHz, real-world endurance (1 million cycles), and accurate alternative part comparisons - all grounded in Microchip's DS22109A documentation.

Technical Context

The 24VL024HT/ST implements a standard two-wire I²C slave interface with fixed 7-bit address prefix '1010' and user-configurable A0–A2 pins enabling up to eight devices on one bus. Its internal architecture includes an address pointer, page buffer, HV generator for EEPROM programming, and VCC threshold detector disabling write logic below 1.2V.

It supports three read modes (current address, random, sequential) and two write modes (byte and page), with acknowledge polling used to detect write completion. Hardware write protection is controlled solely by the WP pin state - tied to VCC for protecting addresses 80h–FFh, or VSS for full array access.

Key Specifications

Pinout & Package

24VL024HT/ST is supplied in an 8-pin TSSOP package (4.4 mm body width), RoHS-compliant and Pb-free, with standard 0.65 mm lead pitch and exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA024H-I/ST and AT24C02C-SSHM-T, the 24VL024HT/ST uniquely supports 1.5V operation - essential for coin-cell and energy-harvesting applications - while offering hardware-based half-array write protection that requires no firmware intervention or risk of accidental disable.

Availability

24VL024HT/ST is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, medical sensors, and automotive body control units requiring stable component supply, long-term data retention, and low-voltage compatibility.

Supply support for 24VL024HT/ST 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 memory products, with global design and manufacturing infrastructure.

The 24VL024HT/ST belongs to Microchip's low-voltage serial EEPROM product line, engineered specifically for battery-powered and energy-constrained embedded systems where operation below 1.8V and ultra-low standby current are mandatory.

FAQ

What is the minimum operating voltage for the 24VL024HT/ST?

The 24VL024HT/ST operates down to 1.5V, with full functionality including I²C communication, read/write operations, and hardware write protection. Below 1.8V, maximum clock frequency is limited to 100 kHz per DS22109A specifications. This 1.5V capability makes the 24VL024HT/ST suitable for primary lithium and energy-harvesting applications where other 2 Kbit EEPROMs require ≥1.8V.

How does hardware write protection work on the 24VL024HT/ST?

Hardware write protection on the 24VL024HT/ST is controlled exclusively by the WP pin: when tied to VCC, addresses 80h–FFh (upper 128 bytes) are locked against write and page-write commands; when tied to VSS, full-array access is enabled. The 24VL024HT/ST does not support software-controlled or partial-page locking - protection is binary and physically enforced by internal circuitry.

Can multiple 24VL024HT/ST devices share the same I²C bus?

Yes - up to eight 24VL024HT/ST devices can operate on a single I²C bus using unique slave addresses generated by combinations of A0, A1, and A2 pins. Each device responds only when its A0–A2 state matches the corresponding bits in the master's transmitted control byte (1010 A2 A1 A0 R/W), enabling scalable memory expansion without address conflicts.

What is the page size and maximum page write length for the 24VL024HT/ST?

The 24VL024HT/ST has a 16-byte page buffer, allowing up to 16 bytes to be written in a single page-write operation. Physical page boundaries align to 16-byte intervals (e.g., 00h–0Fh, 10h–1Fh). Crossing a boundary during page write causes wraparound within the current page - software must ensure address alignment to avoid unintended overwrites.

Does the 24VL024HT/ST support I²C clock stretching or multi-master arbitration?

No - the 24VL024HT/ST is a pure I²C slave device with no clock-stretching capability and no multi-master arbitration logic. It relies entirely on the master to generate SCL and manage bus contention. Acknowledge polling (repeated Start + control byte) is the only supported method to detect write-cycle completion.