APS6404L-3SQR-SN
Overview
The APS6404L-3SQR-SN is a 64Mbit Pseudo-SRAM (PSRAM) that combines the high density of DRAM with the simple interface of SRAM through an internal self-refresh mechanism. It supports High-Speed Quad Serial Interface (QSPI) and Serial Peripheral Interface (SPI) modes at speeds up to 133MHz, operating on a 2.7V to 3.6V supply. This component is designed for applications requiring more memory than typical MCU-integrated RAM without the routing complexity of traditional DDR memory.
Why Choose This Part
It offers 8MB of additional RAM using only 6 signal pins in a compact SOP-8 package, significantly reducing PCB footprint compared to parallel memory. The self-managed refresh feature eliminates the need for a dedicated DRAM controller, allowing it to interface directly with standard QSPI peripherals found on modern microcontrollers.
Applications
Getting Started
To use this part, configure your microcontroller's SPI or QSPI peripheral for Mode 0 or Mode 3 operation. Ensure the VDD is within the 2.7V to 3.6V range and implement the software reset sequence after power-up as specified in the datasheet. Drivers are often available in frameworks like ESP-IDF or through generic QSPI memory libraries for ARM Cortex-M microcontrollers.
Also Consider
Espressif Systems
- An integrated module that already includes 8MB of Octal PSRAM for high-performance memory needs.
