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docs: resolve FPGA grade to commercial (8BG381C), correct temp range data

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User confirmed LFE5U-45F-8BG381C (commercial) is the intended part,
matching every other reference in this project. Also corrects this
chapter's own earlier temperature figures: commercial grade is real
TJ 0 to +85C, industrial is TJ -40 to +100C (an earlier draft of this
section had the industrial range wrong at -40/+85C). Same "-8" speed
grade in both -- the letter suffix only changes the characterized
temperature range. KiCad library still needs the part number itself
corrected from ...381I to ...381C.

Compiled clean (47 pages, 0 errors).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013xXuuRUWZScuo1DeYJxs3v
This commit is contained in:
michele
2026-09-07 19:46:14 +02:00
co-authored by Claude Sonnet 5
parent a3ba8f93ac
commit 86581e1521
2 changed files with 10 additions and 7 deletions
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files/docs/datasheet/v2-en/FPGA-Neural-V2-Datasheet-EN.pdf
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files/docs/datasheet/v2-en/chapters/10-hardware.tex
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@@ -433,13 +433,16 @@ U9 & 1 & \code{W25Q128JVPIM} & WSON-8, 6$\times$5\,mm (real Winbond DTR datashee
\bottomrule
\end{tabularx}
\subsection{Discrepancy: FPGA grade}
\textbf{U2 is captured as \code{LFE5U-45F-8BG381I}} (industrial,
$-40$ to $+85^{\circ}$C) --- every other reference in this project
(LPF, this chapter, decisions.log) uses \textbf{\code{LFE5U-45F-8BG381C}}
(commercial). Could be a deliberate upgrade (consistent with the
SDRAM's own industrial rating), but needs an explicit confirmation ---
otherwise a real part-number error in the KiCad library.
\subsection{Discrepancy: FPGA grade --- resolved}
U2 was captured as \code{LFE5U-45F-8BG381I} (industrial grade, real
$T_J$ range $-40$ to $+100^{\circ}$C) --- every other reference in
this project (LPF, this chapter, decisions.log) uses
\textbf{\code{LFE5U-45F-8BG381C}} (commercial grade, real $T_J$ range
$0$ to $+85^{\circ}$C; same ``$-8$'' speed grade in both --- the
letter suffix changes only the characterized temperature range, not
logic speed). \textbf{User confirmed C (commercial)} is the intended
part, consistent with every other reference --- the KiCad library
entry needs correcting from \code{...381I} to \code{...381C}.
\subsection{Open items resolved by this BOM}
R3=499\,k$\Omega$ confirms TLV62568's EN is populated (matches TI's