Microchip Technology 24VL014H/ST

Overview

24VL014H from Microchip Technology Inc. is a 1 Kbit (128 × 8) I²C-compatible serial EEPROM with single-supply operation down to 1.5V, 400 μA max active current, 1 μA max standby current, and hardware write protection for half-array (40h–7Fh). It supports cascading up to eight devices on one bus and targets low-power embedded systems requiring nonvolatile storage in space-constrained designs.

For engineers reviewing the 24VL014H datasheet, 24VL014H pinout, 24VL014H application, or 24VL014H equivalent, key selection considerations include its 1.5–3.6V VCC range, 100/400 kHz I²C clock compatibility (voltage-dependent), Schmitt-trigger noise immunity on SDA/SCL, page-write buffer (up to 16 bytes), and verified 1 million erase/write cycles with >200-year data retention.

Technical Context

The 24VL014H implements a standard I²C slave interface with fixed 4-bit control code (1010b), three user-configurable chip-select inputs (A0–A2), and hardware write-protect logic tied to the WP pin. Its internal address counter enables current-address, random, and sequential read modes, while the page buffer supports burst writes within a 16-byte physical page boundary.

It features a VCC threshold detector disabling write operations below 1.0V, Schmitt-trigger inputs with ≥0.05×VCC hysteresis, and input/output filtering suppressing >50 ns noise spikes. The device uses self-timed internal erase/write cycles (max 5 ms) and requires no external timing components.

Key Specifications

Pinout & Package

24VL014H is available in 8-pin PDIP, SOIC (150 mil), TSSOP, MSOP, and 2×3 mm TDFN packages. All variants share identical pin mapping and electrical behavior.

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 24VL014H uniquely delivers guaranteed 1.5V operation, deterministic half-array hardware write protection, and Schmitt-trigger noise immunity-making it optimal for ultra-low-voltage, safety-critical, or electrically harsh environments where deterministic protection and robustness outweigh software flexibility.

Availability

24VL014H is available at Aetrix Electronics and suitable for smart metering, industrial sensors, medical wearables, and IoT edge nodes requiring stable component supply across extended product lifecycles.

Supply support for 24VL014H 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, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24VL014H belongs to Microchip's low-voltage serial EEPROM product line, designed specifically for energy-constrained applications where reliable nonvolatile storage must operate directly from emerging 1.8V and sub-2V power rails.

FAQ

What is the minimum operating voltage for the 24VL014H?

The 24VL014H operates down to 1.5V, making it compatible with modern ultra-low-power microcontrollers and battery-powered systems. Below 1.8V, the maximum I²C clock frequency is limited to 100 kHz. The internal voltage detector disables write operations if VCC drops below 1.0V, preventing corrupted data writes during brown-out conditions. This 1.5V minimum ensures the 24VL014H can function directly from single-cell lithium or coin-cell sources without regulation.

How does hardware write protection work on the 24VL014H?

The 24VL014H implements hardware write protection via the WP pin: when tied to VCC, addresses 40h–7Fh (half the 128-byte array) are permanently protected from write or erase operations. When WP is tied to VSS, full-array access is enabled. Unlike software-based protection, this scheme is immune to firmware errors or bus glitches. The 24VL014H still acknowledges write attempts to protected addresses but ignores the data-ensuring system-level predictability without requiring protocol changes.

Can multiple 24VL014H devices share the same I²C bus?

Yes, up to eight 24VL014H devices can be cascaded on a single I²C bus using the A0, A1, and A2 pins to configure unique 3-bit slave addresses. Each device responds only when its A0–A2 combination matches the corresponding bits in the master's control byte (1010b + A2A1A0 + R/W). This enables contiguous 8 Kbit expansion without additional GPIOs or address decoding logic, and the 24VL014H's 1 μA standby current ensures minimal bus loading in multi-device configurations.

What is the purpose of the Schmitt trigger inputs on the 24VL014H?

The 24VL014H integrates Schmitt trigger inputs on SDA and SCL pins with ≥0.05×VCC hysteresis and 50 ns spike suppression filtering. This design eliminates false start/stop detection caused by noise on shared PCB traces or in electrically noisy environments like motor drives or industrial controls. By rejecting transients that would otherwise corrupt I²C communication, the Schmitt triggers allow reliable operation without external RC filters-reducing BOM cost and board area while maintaining signal integrity.

What is the maximum write cycle time for the 24VL014H?

The 24VL014H specifies a maximum write cycle time of 5 ms for both byte and page writes. This self-timed internal cycle includes auto-erase and programming, requiring no external timing control. During this period, the device does not acknowledge I²C commands (ACK polling is used to detect completion). The 5 ms value is guaranteed across the full -20°C to +85°C temperature range and 1.5–3.6V VCC, ensuring predictable firmware timing margins regardless of operating conditions.