Microchip Technology 24VL024H/SN

Overview

24VL024H from Microchip Technology Inc. is a 2 Kbit (256 × 8) I²C-compatible serial EEPROM designed for ultra-low-voltage embedded systems. It operates from 1.5V to 3.6V, draws ≤400 μA active current and ≤1 μA standby current, supports 100 kHz/400 kHz I²C bus speeds, and features hardware write-protection for the upper half-array (80h–FFh). It is used in battery-powered sensors, portable medical devices, and industrial control modules requiring nonvolatile memory with robust noise immunity.

For engineers reviewing the 24VL024H datasheet, 24VL024H pinout, 24VL024H application, or 24VL024H equivalent, this page delivers verified electrical specs, validated I²C timing constraints across voltage ranges, confirmed package mappings (SOIC/SN), exact pin functions including A0–A2 address selection and WP logic behavior, and real-world use cases in low-power firmware storage and calibration data retention.

Technical Context

The 24VL024H implements a true I²C slave interface with Schmitt-triggered SDA/SCL inputs and internal spike filtering (≤50 ns), enabling reliable operation on noisy PCBs. Its address decoding uses three user-configurable pins (A0–A2) to support up to eight devices on one bus, with contiguous 16 Kbit expansion via software-managed address bit mapping (A9–A11).

Write operations include byte and page modes (up to 16 bytes per page), both featuring self-timed erase/write cycles (≤5 ms), automatic acknowledge polling support, and hardware-enforced protection when WP = VCC. The device includes a VCC threshold detector that disables write logic below 1.2 V, preventing corruption during brown-out conditions.

Key Specifications

Pinout & Package

24VL024H is available in multiple 8-pin packages including SOIC (SN), PDIP, TSSOP, MSOP, and 2×3 mm TDFN. All variants share identical pin numbering and function mapping per Microchip DS22109A.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA024H and AT24C02D, the 24VL024H uniquely delivers guaranteed 1.5 V operation, sub-1 μA standby current, and dedicated hardware write-protection for the upper memory block-making it the only choice for battery-critical, safety-sensitive, or ultra-low-voltage designs where those attributes are non-negotiable.

Availability

24VL024H is available at Aetrix Electronics and suitable for industrial automation, portable medical electronics, and smart metering applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for 24VL024H 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 microcontroller, mixed-signal, analog, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with vertically integrated silicon and development tools.

The 24VL024H belongs to Microchip's low-voltage serial EEPROM product line, engineered specifically for energy-constrained applications where operation below 1.8 V, minimal quiescent current, and robust I²C interoperability are essential design requirements.

FAQ

What is the minimum operating voltage for the 24VL024H?

The 24VL024H guarantees full functionality down to 1.5 V, with I²C clock speeds of 100 kHz at VCC < 1.8 V and 400 kHz at VCC ≥ 1.8 V. Below 1.2 V, internal write logic is disabled by a built-in threshold detector to prevent data corruption during brown-out events. This makes the 24VL024H uniquely suited for coin-cell and energy-harvesting systems where other 2 Kbit EEPROMs fail to operate.

How does hardware write-protection work on the 24VL024H?

When the WP pin is tied to VCC, the 24VL024H hardware write-protection activates and blocks all write operations to memory addresses 80h through FFh (128 bytes), while allowing unrestricted access to 00h–7Fh. If WP is tied to VSS, write protection is fully disabled. Unlike software locks, this protection persists even during power loss and requires no firmware intervention-ensuring critical calibration or security data remains immutable.

Can multiple 24VL024H devices share the same I²C bus?

Yes-the 24VL024H supports up to eight devices on a single I²C bus using its three chip-select pins (A0, A1, A2), each configurable as logic high or low. Each device responds only to its unique 7-bit slave address (1010xxxA, where xxx is the A2–A0 combination). This enables scalable memory expansion up to 16 Kbits without additional GPIO or address decoders, and the 24VL024H maintains full timing compliance across all configurations.

What is the maximum write cycle time for the 24VL024H?

The 24VL024H specifies a maximum write cycle time of 5 ms for both byte and page writes, regardless of VCC level or temperature. During this period, the device does not acknowledge I²C commands-a behavior leveraged by acknowledge polling to detect completion. This fixed timing simplifies firmware design versus variable-latency EEPROMs and ensures predictable system response during configuration updates.

Which package types are available for the 24VL024H?

The 24VL024H is offered in five industry-standard 8-pin packages: PDIP (P), SOIC (SN), TSSOP (ST), MSOP (MS), and 2×3 mm TDFN (MNY). All share identical pinout and electrical characteristics; the SN variant (plastic SOIC, 3.90 mm body) is the most widely used for automated assembly. Package markings include temperature grade (I = –20°C to +85°C), year/week code, and traceability data per Microchip DS22109A.