Microchip Technology 34LC02T-I/MNY

Overview

34LC02T-I/MNY from Microchip Technology is a 2 Kbit I²C-compatible serial EEPROM with hardware and dual software write-protection, 1 MHz clock support (V_CC ≥ 2.5 V), 16-byte page write buffer, and operation down to 1.7 V. It features Schmitt-trigger inputs, slope-controlled outputs, and >1 million erase/write cycles - deployed in industrial sensor calibration, embedded configuration storage, and power-management parameter retention.

For engineers reviewing the 34LC02T-I/MNY datasheet, 34LC02T-I/MNY pinout, 34LC02T-I/MNY application, or 34LC02T-I/MNY equivalent, key selection criteria include its 1 MHz I²C speed at 2.5–5.5 V, permanent/resetttable lower-half array protection (00h–7Fh), WP pin-based full-array hardware lock, TDFN-8 package footprint, and automotive-grade (-40°C to +125°C) temperature rating.

Technical Context

The 34LC02T-I/MNY implements a 2-wire I²C slave interface with bidirectional SDA and unidirectional SCL, supporting standard (100 kHz), fast (400 kHz), and fast-plus (1 MHz) modes depending on V_CC. Its internal address pointer enables current-address, random, and sequential reads across 256 × 8-bit memory organized as one block.

Write protection operates at three levels: hardware (WP pin tied to V_CC locks entire 00h–FFh array), resettable software (SWP/CSWP commands protect 00h–7Fh), and permanent software (PSWP command irreversibly locks 00h–7Fh). Acknowledge polling is used to detect write-cycle completion.

Key Specifications

Pinout & Package

34LC02T-I/MNY is housed in an 8-lead 2×3 mm TDFN (Thin Dual Flat No-lead) package with wettable flanks, RoHS-compliant matte tin finish, and thermal pad exposed on underside for enhanced PCB heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C02D-SSHM-T and BR24G02NUX-5TR, the 34LC02T-I/MNY uniquely combines permanent software write-protection (PSWP), TDFN-8 compactness, and automotive-grade temperature validation - making it optimal for safety-critical, space-constrained, and field-programmable embedded systems where data integrity is non-negotiable.

Availability

34LC02T-I/MNY is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded configuration storage, and automotive body control module designs requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-aligned reliability.

Supply support for 34LC02T-I/MNY 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 components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 34LC02 series targets cost-sensitive, low-power embedded systems needing robust, field-updatable nonvolatile storage - especially in automotive, industrial, and consumer applications where write-protection integrity and extended temperature operation are essential.

FAQ

What is the maximum I²C clock frequency supported by the 34LC02T-I/MNY?

The 34LC02T-I/MNY supports up to 1 MHz I²C clock frequency when V_CC is 2.5 V or higher. At 1.7–2.2 V, it defaults to 100 kHz mode. This dual-speed capability allows designers to optimize bus throughput in 3.3 V/5 V systems while maintaining compatibility with legacy 100 kHz controllers during brown-out conditions. The 34LC02T-I/MNY datasheet specifies timing parameters including THIGH, TLOW, and TAA explicitly for 1 MHz operation.

How does hardware write-protection work on the 34LC02T-I/MNY?

Hardware write-protection on the 34LC02T-I/MNY is controlled by the WP pin: when tied to V_CC, it disables all write operations to the full 256-byte memory array (00h–FFh), regardless of software write-protect status. When tied to V_SS, hardware protection is disabled and software-based protection (SWP/PSWP) governs access. This pin-level lock provides fail-safe, power-independent security - critical for protecting bootloader parameters or safety-critical configuration data in the 34LC02T-I/MNY.

Can the 34LC02T-I/MNY be used in automotive applications?

Yes, the 34LC02T-I/MNY is qualified for automotive applications with its -40°C to +125°C operating temperature range (E-temp grade) and design compliance with AEC-Q100 stress testing requirements. Its 1 MHz I²C interface, permanent software write-protection (PSWP), and >4 kV ESD rating make it suitable for body control modules, lighting systems, and powertrain auxiliary functions where data integrity and environmental resilience are mandatory - directly supporting automotive deployment of the 34LC02T-I/MNY.

What package type is used for the 34LC02T-I/MNY?

The 34LC02T-I/MNY uses an 8-lead 2×3 mm TDFN (Thin Dual Flat No-lead) package with exposed thermal pad, designated as "MNY" in Microchip's packaging code. This compact, surface-mount package offers superior thermal performance and board-space efficiency versus SOIC or PDIP alternatives, and is compatible with standard reflow soldering processes. Pinout matches standard 8-lead I²C EEPROM layouts, facilitating drop-in replacement in space-constrained designs using the 34LC02T-I/MNY.

Does the 34LC02T-I/MNY support page write operations?

Yes, the 34LC02T-I/MNY supports 16-byte page write operations, allowing up to 16 contiguous bytes to be written in a single I²C transaction. This reduces bus overhead and improves write efficiency compared to byte-wise writes. Page boundaries align to 16-byte intervals (00h–0Fh, 10h–1Fh, etc.), and crossing boundaries causes wraparound - so firmware must validate addresses before initiating page writes. The 34LC02T-I/MNY's page write time is 3 ms typical, with self-timed erase/write cycle management.