What this 1Kbit SPI EEPROM brings to the board
The Microchip AT25010B-SSHL-B is a 1Kbit serial EEPROM with an SPI interface, clocked at 20 MHz, organized as 128 x 8 bits. The non-volatile memory retains data without power, and the 5ms write cycle time per word or page means you can update a configuration byte or a full page in one operation.
Supply voltage and system compatibility
At 3.3V it's a direct match for most ARM MCUs and FPGAs; at 5V it talks to legacy CPLDs and 8051-style controllers without level shifters. The SPI interface is standard mode 0/3, so it pairs with any SPI master that supports up to 20 MHz. If your design runs at 1.8V core logic, this part still works — no separate I/O rail needed.
This variant ships in a Tube, not Tape & Reel. That's the one to order if you're hand-assembling prototypes, doing rework, or running a low-volume production line where a pick-and-place feeder isn't justified. The 8-SOIC footprint is industry-standard — same land pattern as the AT25010B-SSHL-T (Tape & Reel) and AT25010B-XHL-T (TSSOP), so a layout change isn't needed if you switch between the Tube and reeled versions.