Microchip Technology 24VL014H/SN

Overview

24VL014H from Microchip Technology Inc. is a 1 Kbit (128 × 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 up to 400 kHz clock (100 kHz below 1.8V), and features hardware write-protection for the upper half-array (40h–7Fh). It is used in battery-powered sensor nodes and portable medical devices requiring nonvolatile memory with minimal power overhead.

For engineers reviewing the 24VL014H datasheet, 24VL014H pinout, 24VL014H application, or 24VL014H equivalent, this page delivers verified electrical specs, validated I²C timing constraints, confirmed package mappings across PDIP/SOIC/TSSOP/MSOP/TDFN, real-world endurance (1M cycles), and precise hardware write-protect behavior - all directly extracted from Microchip DS22116A.

Technical Context

The 24VL014H implements a true two-wire I²C slave interface with Schmitt-trigger inputs on SDA/SCL and internal noise filtering (50 ns spike suppression), 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 chip select bits forming the MSBs of the control byte (1010 A2 A1 A0 R/W).

Internally, it integrates a self-timed write cycle (5 ms max), a 16-byte page buffer, and a VCC threshold detector that disables erase/write logic below 1.0 V. Write protection is implemented via the WP pin: tied to VCC, it locks addresses 40h–7Fh; tied to VSS, full array access is enabled.

Key Specifications

Pinout & Package

Available in 8-pin PDIP, SOIC (SN), TSSOP, MSOP, and 2×3 mm TDFN packages. All variants share identical pin mapping and function assignment.

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-3GE2, the 24VL014H uniquely delivers 1.5 V operation, hardware-enforced half-array write protection, and sub-1 μA standby current - making it the only choice for space-constrained, battery-critical designs requiring deterministic, pin-level security for configuration data.

Availability

24VL014H is available at Aetrix Electronics and suitable for smart sensor calibration storage, portable medical device settings, industrial PLC configuration backup, and automotive body control module NVM requiring stable component supply across long-lifecycle programs.

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 where extended battery life, wide temperature operation (−20°C to +85°C), and hardware-level data integrity are mandatory.

FAQ

What is the minimum VCC required for reliable operation of the 24VL014H?

The 24VL014H is fully specified to operate down to 1.5 V, with guaranteed functionality across the entire −20°C to +85°C temperature range. Below 1.8 V, the maximum I²C clock frequency reduces to 100 kHz to maintain timing margins. The internal VCC detector disables write operations if supply drops below 1.0 V, preventing corrupted data writes - a key reliability feature absent in many competing EEPROMs. This makes the 24VL014H uniquely suited for primary-cell and energy-harvesting systems.

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

The 24VL014H uses the WP pin to enable hardware write protection for memory addresses 40h–7Fh (the upper half of its 128-byte array). When WP is tied to VCC, writes to those addresses are blocked at the silicon level - no software command can override this. When WP is tied to VSS, full array access is permitted. Unlike software-lock mechanisms, this protection remains active even during power-up sequences or brownout conditions, ensuring critical calibration or security data cannot be accidentally overwritten. This behavior is explicitly confirmed in DS22116A Section 2.4 and Figure 6-2.

Can multiple 24VL014H devices share the same I²C bus, and how is addressing managed?

Yes, up to eight 24VL014H devices can be cascaded on a single I²C bus using the A0, A1, and A2 pins to set unique 3-bit chip addresses. These pins form the most significant bits of the 7-bit slave address (1010 A2 A1 A0), allowing contiguous 8 Kbit expansion. Each device must have a distinct A0–A2 combination (e.g., 000, 001…111), hardwired to VSS or VCC. No external address decoding logic is needed - the 24VL014H handles address matching internally, as detailed in DS22116A Section 5.0 and Figure 5-1.

What is the actual page write capacity of the 24VL014H, and are there boundary restrictions?

The 24VL014H has a 16-byte page write buffer, but page boundaries are physically aligned to 16-byte intervals (addresses 00h–0Fh, 10h–1Fh, etc.). A page write command crossing a 16-byte boundary wraps around within the current page instead of advancing to the next - meaning writing 16 bytes starting at address 0Fh stores bytes 0Fh–0Fh (1 byte) and 00h–0Eh (15 bytes). This behavior is documented in DS22116A Section 6.2 Note and requires firmware to validate start addresses before initiating multi-byte writes. The 24VL014H does not support cross-page writes.

Does the 24VL014H support standard I²C protocols like repeated START and ACK polling?

Yes, the 24VL014H fully complies with standard I²C protocol requirements, including repeated START conditions and ACK polling to detect write completion. During an internal write cycle, the device stops acknowledging I²C addresses - allowing the master to poll using a START + control byte (R/W=0) until an ACK is received. This eliminates fixed delay loops and maximizes bus utilization. DS22116A Section 7.0 provides the exact flow diagram and timing constraints (e.g., THD:STA, TSU:STA) required for reliable implementation.