Microchip Technology 34VL02T/MS

Overview

34VL02T/MS from Microchip Technology Inc. is a 2 Kbit I²C-compatible serial EEPROM with software and hardware write protection, operating from 1.5V to 3.6V. It features 16-byte page write buffer, 100 nA standby current, and Schmitt-trigger inputs for noise immunity. Used in embedded system configuration storage where low-voltage operation and data integrity are critical.

For engineers reviewing the 34VL02T/MS datasheet, 34VL02T/MS pinout, 34VL02T/MS application, or 34VL02T/MS equivalent, this page delivers verified electrical specs, package mapping to MSOP-8, I²C timing compliance (100/400 kHz), endurance (1M cycles), and real-world write-protection behavior - all confirmed against Microchip DS22079A.

Technical Context

The 34VL02T/MS implements a true 2-wire I²C slave interface with addressable 256 × 8-bit memory array, supporting cascaded configurations up to eight devices via A0–A2 chip-select pins. Its dual software write-protect mechanism (SWP and PSWP) operates exclusively on addresses 00h–7Fh, while the WP pin provides hardware-level full-array protection.

Internal high-voltage detection on A0 enables secure SWP/CSWP command execution; Schmitt-trigger inputs and output slope control suppress ground bounce and bus noise. The device uses self-timed erase/write cycles with no external timing components required.

Key Specifications

Pinout & Package

34VL02T/MS is packaged in an 8-lead MSOP (Mini Small Outline Package) with 0.65 mm pitch, footprint compatible with SOIC-8 but occupying ~50% less board area. Pin 1 is marked with a dot; pin numbering follows standard MSOP convention (counterclockwise from mark).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C02D-SSHM-T and BR24G02FJ-WE2, the 34VL02T/MS uniquely delivers irreversible lower-array protection (PSWP) alongside 1.5V operation - critical for safety-critical calibration storage where firmware cannot be trusted to prevent corruption.

Availability

34VL02T/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, consumer IoT firmware settings, and automotive body control module applications requiring stable component supply and long-term obsolescence management.

Supply support for 34VL02T/MS 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 34VL02T/MS belongs to Microchip's low-voltage serial EEPROM product line, designed specifically for energy-constrained and safety-critical embedded systems requiring robust, field-programmable nonvolatile storage.

FAQ

What is the minimum operating voltage for the 34VL02T/MS?

The 34VL02T/MS operates down to 1.5V across its full temperature range (–20°C to +85°C). At VCC < 1.8V, maximum I²C clock frequency is limited to 100 kHz; 400 kHz operation is supported when VCC ≥ 1.8V. This enables direct integration into 1.8V logic domains without level-shifting circuitry.

How does hardware write protection work on the 34VL02T/MS?

Hardware write protection on the 34VL02T/MS is controlled by the WP pin: when tied to VCC, the entire memory array (addresses 00h–FFh) becomes write-protected regardless of software write-protect status. When WP is tied to VSS, hardware protection is disabled and software-based protection (SWP/PSWP) governs access to the lower 128 bytes.

Can the 34VL02T/MS be used in cascaded I²C configurations?

Yes, the 34VL02T/MS supports cascading up to eight devices on a single I²C bus using the A0, A1, and A2 pins to configure unique 3-bit hardware addresses. Each device responds only when its A2–A0 combination matches the corresponding bits in the master's control byte, enabling scalable memory expansion without additional address decoding logic.

What is the purpose of the A0 pin beyond chip selection?

In addition to serving as the least-significant chip-select bit, the A0 pin on the 34VL02T/MS detects high-voltage (VHV) during SWP and CSWP command execution. Applying VHV (7–10V depending on VCC) to A0 validates these security-sensitive commands, preventing accidental activation under normal 1.5–3.6V operation.

Does the 34VL02T/MS support page write operations, and what is the buffer size?

Yes, the 34VL02T/MS supports page write operations with a 16-byte internal buffer. Writes must remain within a single physical page boundary (addresses aligned to 00h, 10h, 20h, etc.); crossing boundaries causes wraparound within the current page. This enables efficient multi-byte updates with one Stop condition and reduces I²C bus overhead.