Microchip Technology 24VL014T/ST

Overview

24VL014T/ST from Microchip Technology Inc. is a 1 Kbit (128 × 8) I²C-compatible serial EEPROM optimized for ultra-low-voltage operation down to 1.5 V, featuring 400 μA max active current, 1 μA max standby current, and hardware write protection via the WP pin. It supports 100 kHz (V_CC < 1.8 V) or 400 kHz (V_CC ≥ 1.8 V) bus speeds and integrates Schmitt-trigger inputs and output slope control for noise immunity in space-constrained industrial sensor nodes and battery-powered IoT endpoints.

For engineers reviewing the 24VL014T/ST datasheet, 24VL014T/ST pinout, 24VL014T/ST application, or 24VL014T/ST equivalent, key selection criteria include its 1.5–3.6 V supply range, 6-lead SOT-23 package footprint, page-write buffer (up to 16 bytes), >1 million endurance cycles, and 200-year data retention-critical for firmware parameter storage in medical wearables and automotive body-control modules.

Technical Context

The 24VL014T/ST implements a true I²C slave interface with bidirectional SDA and unidirectional SCL, supporting standard-mode (100 kHz) and fast-mode (400 kHz) timing per JEDEC JESD84-A41. Its internal address counter enables sequential reads across the full 128-byte memory space, while the 3-bit chip-select logic (A0, A1, A2) allows up to four devices on one bus in SOT-23 configuration.

Write operations use an on-chip page buffer and self-timed erase/write cycle (max 5 ms), with acknowledge polling supported to avoid fixed delays. Hardware write protection is disabled in the SOT-23 variant (no WP pin), unlike 8-pin packages where tying WP to V_CC locks the entire 00h–7Fh array.

Key Specifications

Pinout & Package

24VL014T/ST is supplied in a Pb-free, RoHS-compliant 6-lead SOT-23 package (1.6 mm × 2.8 mm × 1.1 mm). Unlike 8-pin variants, this package omits A2 and WP pins, limiting cascading to four devices and disabling hardware write protection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C01D-SSHM-T and BR24G01NUX-5TR, the 24VL014T/ST uniquely delivers verified 1.5 V operation with integrated noise suppression, making it the only choice for energy-harvesting nodes and ultra-low-power medical sensors where supply headroom is constrained.

Availability

24VL014T/ST is available at Aetrix Electronics and suitable for medical wearables, automotive body control units, industrial sensor nodes, and smart energy meters requiring stable component supply across extended product lifecycles.

Supply support for 24VL014T/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 leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24VL014T/ST belongs to Microchip's low-voltage serial EEPROM product line, engineered specifically for battery-powered and energy-constrained applications demanding robust I²C communication and long-term data integrity.

FAQ

What is the minimum operating voltage for the 24VL014T/ST?

The 24VL014T/ST operates down to 1.5 V, enabling direct integration with single-cell lithium or alkaline batteries without voltage regulation. This specification is validated across the full industrial temperature range (–20°C to +85°C) and is critical for maintaining I²C communication integrity during battery discharge. The internal voltage detector disables write operations below ~1.0 V to prevent data corruption, ensuring reliability even under brownout conditions.

Does the 24VL014T/ST support hardware write protection?

No, the 24VL014T/ST does not support hardware write protection because the SOT-23 package omits the WP pin. Unlike 8-pin variants (PDIP, SOIC, TSSOP), this 6-lead version relies entirely on software-controlled write enable/disable sequences. All 128 bytes remain writable at all times, requiring firmware-level access control for secure configuration storage in applications like smart meters or medical devices.

How many 24VL014T/ST devices can be connected on a single I²C bus?

Up to four 24VL014T/ST devices can share one I²C bus, as the SOT-23 package provides only A0 and A1 address pins (A2 is unconnected). This yields four unique 7-bit slave addresses (1010000, 1010001, 1010010, 1010011) per bus segment. For larger memory expansion, multiple buses or alternative packaging (e.g., 8-pin SOIC with A2) must be used to achieve eight-device cascading.

What is the maximum I²C clock frequency supported by the 24VL014T/ST?

The 24VL014T/ST supports up to 400 kHz I²C clock frequency when V_CC is 1.8 V or higher; at V_CC below 1.8 V, the maximum clock rate drops to 100 kHz to ensure timing margin compliance. These limits are defined by AC characteristics including THIGH, TLOW, and rise/fall time specifications, and must be observed in both master controller firmware and PCB layout (e.g., trace length, pull-up resistor value).

What packaging and marking details apply to the 24VL014T/ST?

The 24VL014T/ST uses a Pb-free, RoHS-compliant 6-lead SOT-23 package (JEDEC MO-178AA) with body dimensions 1.6 mm × 2.8 mm × 1.1 mm. Marking consists of "HENN" (where NN = traceability code) on the top surface, followed by year-week date code (e.g., "2112" for week 12 of 2021). No temperature grade suffix appears, confirming its industrial –20°C to +85°C rating.