Memory IC Procurement: Flash, EEPROM, SRAM Guide

Memory ICs store code and data across every device. This guide covers procurement of Flash, EEPROM and SRAM.

By Vigny (深圳市华芯购电子有限公司) · Published 2026-09-27 · Data verified 2026-09-29 · Sources: manufacturer datasheets & HuaXinGou stock verification

Memory Types

NOR Flash (code execution, SPI/parallel), NAND Flash (bulk storage), EEPROM (small persistent data), and SRAM (fast volatile data). Each has distinct supply dynamics.

Key Parameters

Density, interface (SPI/QSPI, I2C, parallel), voltage, speed grade and endurance (write cycles). Match the part to the application's data and endurance needs.

Market Notes

NOR Flash is stable; NAND and DRAM fluctuate with server/AI demand; EEPROM is commodity. Verify density suffix carefully (e.g., W25Q64 = 64Mbit, AT24C02 = 2Kbit).

Sourcing

Winbond, GigaDevice, Macronix, Micron, Microchip/ADI supply memory. HuaXinGou quotes with full part number verification and batch traceability.

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Frequently Asked Questions

What is the difference between NOR and NAND?

NOR supports random access and code execution; NAND offers higher density for bulk storage at lower cost per bit.

What is write endurance?

The number of erase/write cycles — EEPROM ~1M, NOR ~100K, NAND ~10K-100K depending on grade.

How do I specify memory in a BOM?

Use exact full MPNs (density, speed, temperature, package suffix) to avoid mismatch.

W25Q64: 64Mbit SPI NOR Flash — Datasheet, Specs & Buying →　DDR5 RDIMM Procurement Guide 2026 →　STM32H743: High-Performance Cortex-M7 MCU — Specs & Buying Guide →　AT24C02: 2Kbit I2C EEPROM Datasheet & Buying Guide →

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