Microchip Technology 24VL014HT/ST

Overview

24VL014HT/ST 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 the 40h–7Fh memory block. It supports cascading up to eight devices on one bus and delivers >1 million erase/write cycles with >200 years data retention - deployed in low-power industrial sensor nodes and battery-backed configuration storage.

For engineers reviewing the 24VL014HT/ST datasheet, 24VL014HT/ST pinout, 24VL014HT/ST application, or 24VL014HT/ST equivalent, key selection considerations include its 1.5–3.6V VCC range, half-array hardware write-protect via WP pin, Schmitt-triggered SDA/SCL inputs for noise immunity, page-write buffer (up to 16 bytes), and compatibility with both 100 kHz (VCC < 1.8V) and 400 kHz (VCC ≥ 1.8V) I²C clock rates.

Technical Context

The 24VL014HT/ST implements a true I²C slave interface with bidirectional open-drain SDA and input-only SCL, requiring external pull-up resistors. Its internal address counter enables current-address, random, and sequential read modes, while the 16-byte page buffer optimizes burst writes without host-side timing overhead.

Hardware write protection is implemented via the WP pin: tied to VCC, it locks addresses 40h–7Fh (half the array); tied to VSS, full-array writes are permitted. A VCC threshold detector disables erase/write logic below 1.0V, and Schmitt-trigger + digital filtering on SDA/SCL suppresses noise spikes up to 50 ns.

Key Specifications

Pinout & Package

24VL014HT/ST is supplied in an 8-pin TSSOP package (4.4 mm body width), RoHS-compliant and Pb-free per JEDEC J-STD-020. Pin functions are identical across all 8-pin variants (PDIP, SOIC, TSSOP, MSOP, TDFN).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C01C-SSHM-T and M95010-WMN6TP, the 24VL014HT/ST uniquely combines ultra-low-voltage operation (1.5V), hardware half-array write protection, and I²C compatibility - making it optimal for battery-constrained, safety-critical, or multi-device I²C systems where deterministic memory locking is required without software intervention.

Availability

24VL014HT/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, smart meter firmware flag storage, and automotive body control module applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 24VL014HT/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 microcontroller, mixed-signal, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design, manufacturing, and sales operations.

The 24VL014HT/ST belongs to Microchip's low-voltage serial EEPROM product line, engineered specifically for energy-efficient, noise-resilient, and space-constrained embedded systems operating from single-cell batteries or wide-input power rails.

FAQ

What is the minimum VCC voltage required for reliable operation of the 24VL014HT/ST?

The 24VL014HT/ST operates reliably down to 1.5V VCC across the full -20°C to +85°C temperature range. Below 1.8V, the maximum I²C clock frequency is limited to 100 kHz; above 1.8V, it supports up to 400 kHz. Internal circuitry disables write operations if VCC falls below 1.0V, preventing corruption during brownout conditions.

How does the hardware write-protection feature work on the 24VL014HT/ST?

The 24VL014HT/ST uses the WP pin for hardware write protection: when tied to VCC, addresses 40h–7Fh (64 bytes, half the array) are locked against write or erase commands; when tied to VSS, full-array writes are enabled. This protection is physical and independent of I²C commands - no software overhead or register writes are required.

Can multiple 24VL014HT/ST devices share the same I²C bus, and how is addressing managed?

Yes, up to eight 24VL014HT/ST devices can be cascaded on a single I²C bus using the A0, A1, and A2 pins to configure unique 3-bit chip select bits. The base slave address is 1010xxx (binary), where xxx corresponds to the logic levels on A2–A0. Each device responds only to its assigned address, enabling contiguous 8 Kbit expansion without additional address decoding logic.

What is the purpose of the Schmitt trigger and input filtering on SDA and SCL pins of the 24VL014HT/ST?

The Schmitt trigger inputs on SDA and SCL provide hysteresis (≥0.05×VCC) to reject slow-rising/falling noise edges, while the integrated 50 ns digital filter suppresses short-duration spikes. Together, they prevent false Start/Stop condition detection on electrically noisy buses - critical in industrial motor drives or automotive environments where EMI is prevalent.

Does the 24VL014HT/ST support page writes, and what is the maximum buffer size?

Yes, the 24VL014HT/ST supports page writes with a 16-byte internal buffer. After transmitting the control byte and word address, the master may send up to 16 bytes before issuing a Stop condition; the device automatically increments the lower 4 bits of the address pointer. Page boundaries align to 16-byte intervals (e.g., 00h–0Fh, 10h–1Fh), and crossing boundaries causes wraparound within the same page.