What the NG82355 is and where it fits
The NG82355 is a MOS EISA bus controller from the 82355 series, designed to manage the EISA (Extended Industry Standard Architecture) bus in legacy PC/AT-class systems and industrial backplanes. It handles bus arbitration, timing, and protocol translation between the host CPU and EISA expansion slots. Housed in a 132-pin QFP (PQFP) package, it is a surface-mount part intended for dense multilayer boards where the EISA bus interface is required.
Lifecycle and compliance — what it means for your BOM
RoHS non-compliant. If your assembly requires RoHS exemption or a lead-free process, this part is not a direct fit. Verify your soldering profile and regulatory requirements before committing the BOM line.
Package and handling note
The 132-QFP (PQFP) package has a fine pitch — typical for this era of bus controller. Board layout must account for the pin density; rework requires a hot-air station or dedicated QFP soldering tool. Not a hand-solder part.