Interface timing and write cycle
The 24LC1025T-E/SM: The 400 kHz I²C clock is the standard fast-mode rate — no need for a custom bit-bang routine. The 5 ms page write cycle is the time the part is busy after a write; the master must poll the acknowledge or wait this interval before sending the next command. At 128 Kbytes, a full-chip rewrite at one byte per write would take over 10 minutes — use the page-write mode (up to 64 bytes per cycle) to cut that to under 3 seconds.
Package and footprint — 8-SOIJ
The 8-SOIC (0.209", 5.30 mm width) package with the supplier device code 8-SOIJ is a standard narrow-body SOIC-8 footprint. The 'J' suffix indicates a JEDEC-standard SOIC with a 1.27 mm pitch — the same land pattern as the common SOIC-8. The 5.30 mm body width is the narrow version, so the pad spacing matches the standard 0.050-inch pitch. Tape & Reel packaging is the production-friendly format for pick-and-place; the Cut Tape option works for prototypes or low-volume builds.