Microchip Technology 24VL014H/MS

Overview

The 24VL014H from Microchip Technology Inc. is a 1 Kbit (128 × 8) I²C-compatible serial EEPROM operating from 1.5V to 3.6V, featuring hardware write-protection for the upper half-array (40h–7Fh), 16-byte page write buffer, and Schmitt-trigger inputs for noise immunity. It supports up to 400 kHz clock frequency (100 kHz below 1.8V), draws ≤400 μA active current and ≤1 μA standby current, and targets low-power embedded systems requiring nonvolatile storage with robust bus reliability.

For engineers reviewing the 24VL014H datasheet, 24VL014H pinout, 24VL014H application, or 24VL014H equivalent, this device is selected for battery-powered instrumentation, industrial sensor nodes, and portable medical devices where extended data retention (>200 years), high endurance (1 million cycles), and single-supply operation down to 1.5V are critical design requirements.

Technical Context

The 24VL014H implements a standard I²C slave interface with fixed 4-bit control code (1010b), three user-configurable chip-select bits (A0–A2), and R/W bit-driven read/write mode selection. Its internal address pointer auto-increments during sequential reads and wraps from 7Fh to 00h, enabling full memory traversal in one transaction.

Write protection is implemented via the WP pin: tied to VCC, it disables writes to addresses 40h–7Fh; tied to VSS, full array access is permitted. The device uses on-chip charge-pump circuitry for erase/write operations and includes a VCC threshold detector that disables programming below 1.0V to prevent corruption during brown-out conditions.

Key Specifications

Pinout & Package

Available in 8-pin MSOP (Micro Small Outline Package), with 3 mm × 3 mm body, 0.65 mm pitch, and exposed pad option per Microchip's packaging documentation. Pin mapping is identical across PDIP, SOIC, TSSOP, TDFN, and MSOP variants.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C01D-SSHM-T and BR24G01FJ-WE2, the 24VL014H uniquely provides half-array hardware write-protection (40h–7Fh), operates down to 1.5V, and maintains strict 1 μA standby current-making it optimal for ultra-low-power, safety-aware embedded systems where partial memory lockdown is mandatory.

Availability

The 24VL014H is available at Aetrix Electronics and suitable for smart sensor calibration, portable medical device settings, and industrial PLC configuration 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 microcontroller, 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, engineered specifically for energy-constrained applications demanding reliable nonvolatile storage at sub-1.8V supply levels and robust noise immunity in electrically harsh environments.

FAQ

What is the minimum operating voltage for the 24VL014H?

The 24VL014H operates down to 1.5V, enabling direct use with primary lithium or coin-cell batteries without voltage boosting. This specification is guaranteed across the full industrial temperature range (−20°C to +85°C) and supports both 100 kHz (at 1.5V–1.79V) and 400 kHz (at 1.8V–3.6V) I²C communication. Below 1.5V, the internal VCC threshold detector disables write operations to prevent data corruption.

How does the hardware write-protection feature work on the 24VL014H?

The 24VL014H uses the WP pin to enable hardware write-protection: when tied to VCC, writes to memory addresses 40h–7Fh (upper half-array) are blocked while lower addresses (00h–3Fh) remain writable; when tied to VSS, full array access is permitted. This protection is active during power-up and persists regardless of I²C command state, providing fail-safe safeguarding of critical configuration data.

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 chip-select bits match the corresponding bits in the master's control byte (1010b + A2A1A0 + R/W). This enables scalable memory expansion to 8 Kbits without additional address decoding logic.

What is the maximum page write size supported by the 24VL014H?

The 24VL014H supports a 16-byte page write buffer, allowing up to 16 consecutive bytes to be loaded into the buffer before initiating an internal write cycle. Page writes must remain within a single physical page boundary (aligned to 16-byte boundaries); crossing boundaries causes wraparound within the current page. The internal write cycle completes in ≤5 ms, after which the device resumes I²C responsiveness.

Does the 24VL014H require external pull-up resistors on the I²C bus lines?

Yes, the 24VL014H requires external pull-up resistors on both SDA and SCL lines because its SDA pin is open-drain and SCL is a CMOS input. Recommended values are 10 kΩ for 100 kHz operation and 2 kΩ for 400 kHz operation, referenced to VCC. These values ensure proper rise times (≤1000 ns at 1.5V, ≤300 ns at 3.6V) and meet I²C bus specification requirements for noise margin and signal integrity.