From 2d0a8662743dfdf7456de4c7be448703ce665c3e Mon Sep 17 00:00:00 2001 From: occheung Date: Fri, 17 Jun 2022 16:07:17 +0800 Subject: [PATCH] 2238: add spec on max voltage with term Updates #35. Same termination structure as bnc/sma-ttl card. Technically the max allowable voltage with termination is a bit higher than 5V. But it seems that it will still exceed the termination resistor rating limit at 5.5V. The only method of acquiring V_ds & other parameters is by eye-balling the I-V curve of the MOSFET, which is not precise. So the calculation assumes V_ds=0, just to be conservative. --- 2238.tex | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/2238.tex b/2238.tex index 1d5be37..7482d6b 100644 --- a/2238.tex +++ b/2238.tex @@ -488,7 +488,7 @@ Both recommended operating conditions and electrical characteristics are based o \textbf{Parameter} & \textbf{Symbol} & \textbf{Min.} & \textbf{Typ.} & \textbf{Max.} & \textbf{Unit} & \textbf{Conditions} \\ \hline - Input voltage & $V_{I}$ & 0 & & 5.5 & V \\ + Input voltage & $V_{I}$ & 0 & & 5.5* & V \\ \hline High-level output current & $I_{OH}$ & & & -24 & mA \\ \hline @@ -496,6 +496,7 @@ Both recommended operating conditions and electrical characteristics are based o \hline Input edge rate & $\frac{\Delta t}{\Delta V}$ & 0 & & 10 & ns/V & $0.8V \leq V_I \leq 2.0V$ \\ \thickhline + \multicolumn{7}{l}{*With the 50\textOmega~termination enabled, the input voltage should not exceed 5V.} \end{tabularx} \end{threeparttable} \end{table}