Microchip Technology AT24C02D-STUM-T

Overview

AT24C02D-STUM-T from Microchip Technology is a 2-Kbit I²C-compatible serial EEPROM organized as 256 × 8 bits, operating from 1.7V to 3.6V with industrial temperature range (−40°C to +85°C), 1 MHz Fast Mode Plus support, and hardware write-protection via WP pin - used for nonvolatile configuration storage in embedded microcontroller systems.

For engineers reviewing the AT24C02D-STUM-T datasheet, AT24C02D-STUM-T pinout, AT24C02D-STUM-T application, or AT24C02D-STUM-T equivalent, key selection criteria include voltage compatibility (1.7–3.6 V), I²C bus speed mode support (Standard/Fast/Fast Mode Plus), page-write capability (8-byte pages), endurance (1M cycles), and package-specific pin mapping (UDFN-8).

Technical Context

The AT24C02D-STUM-T functions as an I²C slave device with fixed 7-bit address prefix 1010b and three programmable address bits (A2–A0), enabling up to eight devices on one bus. It implements Schmitt-triggered, noise-filtered SDA/SCL inputs and supports bidirectional data transfer with ACK/NACK handshaking.

Its memory is partitioned into 32 pages of 8 bytes each, supporting byte-write, page-write (with partial-page capability), random read, and sequential read. Internal high-voltage generation enables self-timed write cycles completing within 5 ms maximum, independent of host timing.

Key Specifications

Pinout & Package

AT24C02D-STUM-T is supplied in an 8-pad UDFN (Ultra Thin Dual Flat No-lead) package, 2.0 mm × 1.6 mm × 0.55 mm body, wettable flank capable, RoHS-compliant and halide-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M24C02-RMN6TP, AT24C02D-STUM-T delivers 2.5× faster I²C throughput via 1 MHz Fast Mode Plus, while BR24G02NUX-10 offers extended voltage headroom (1.6–5.5 V) but shares identical UDFN-8 footprint and functional behavior - making it a true form-fit-function alternative where supply flexibility is critical.

Availability

AT24C02D-STUM-T is available at Aetrix Electronics and suitable for smart sensor nodes, industrial PLC modules, medical diagnostic handsets, and automotive body control modules requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for AT24C02D-STUM-T 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 is a leading provider of microcontrollers, analog components, and memory solutions, with a focus on embedded control and connectivity.

The AT24C02D belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-voltage, I²C-based nonvolatile data storage in space-constrained and power-sensitive applications.

FAQ

What is the memory organization of the AT24C02D-STUM-T?

The AT24C02D-STUM-T contains 2,048 bits of EEPROM memory organized as 256 words × 8 bits (256 × 8). It is internally structured into 32 pages of 8 bytes each, supporting both byte-write and 8-byte page-write operations. This layout enables efficient partial-page updates and aligns with standard I²C EEPROM addressing conventions used across Microchip's AT24Cxx family. The AT24C02D-STUM-T uses the same memory map as documented in DS20006100A.

Does the AT24C02D-STUM-T support 1 MHz I²C communication?

Yes, the AT24C02D-STUM-T supports 1 MHz Fast Mode Plus (FM+) I²C operation, but only when VCC is between 2.5 V and 3.6 V. At lower voltages (1.7–2.49 V), it operates in Standard Mode (100 kHz) or Fast Mode (400 kHz). This voltage-dependent speed scaling ensures timing compliance across its full operating range. The AT24C02D-STUM-T meets all AC timing specifications in Table 4-3 of DS20006100A for FM+ mode.

How does the Write-Protect (WP) pin function on the AT24C02D-STUM-T?

The WP pin on the AT24C02D-STUM-T is an active-high hardware lock: when pulled to VCC, it inhibits all write operations to the entire memory array; when tied to GND, normal read/write functionality is enabled. If left floating, the internal strong pull-down defaults WP to GND, enabling writes - though Microchip recommends explicit biasing to avoid noise-induced misbehavior. This feature is implemented directly in silicon and requires no firmware intervention. The AT24C02D-STUM-T behavior matches Table 2-2 in DS20006100A.

What package type is used for the AT24C02D-STUM-T?

The AT24C02D-STUM-T is packaged in an 8-pad UDFN (Ultra Thin Dual Flat No-lead) with dimensions 2.0 mm × 1.6 mm × 0.55 mm, featuring wettable flanks for automated optical inspection. Pin 1 is marked by a dot, and the exposed pad may be connected to GND or left floating. This package is distinct from SOIC, TSSOP, or VFBGA variants of the AT24C02D family and is confirmed by Microchip's ordering information and package drawings in DS20006100A.

What is the endurance and data retention specification for the AT24C02D-STUM-T?

The AT24C02D-STUM-T guarantees 1,000,000 write cycles per memory location and 100 years of data retention at 55°C, as validated per Microchip's qualification process and specified in Table 4-6 of DS20006100A. These figures apply across the full industrial temperature range (−40°C to +85°C) and supply voltage range (1.7–3.6 V). Endurance testing follows JEDEC standards, and retention is extrapolated from accelerated high-temperature testing with statistical confidence.