From 3654502d1b7ddac9c30e93c568110e8e7656cd7d Mon Sep 17 00:00:00 2001 From: occheung Date: Fri, 14 Jan 2022 14:09:25 +0800 Subject: [PATCH] dio: add spec sources Also remove propagation delay specs from LVDS-TTL. PCB traces would make a significant impact. --- 2118-2128.tex | 1 + 2238.tex | 6 ++++-- 2245.tex | 16 +++++----------- 3 files changed, 10 insertions(+), 13 deletions(-) diff --git a/2118-2128.tex b/2118-2128.tex index dd97012..92f233e 100644 --- a/2118-2128.tex +++ b/2118-2128.tex @@ -341,6 +341,7 @@ The card support a minimum pulse width of 3ns. \section{Electrical Specifications} All specifications are in $0\degree C \leq T_A \leq 70\degree C$ unless otherwise noted. +Pulse width distortion \& peak jitters are based on the isolator IC (SI8651BB-B-IS1), other specifications are based on the bus transceivers IC (SN74BCT25245DW). \begin{table}[h] \begin{threeparttable} diff --git a/2238.tex b/2238.tex index 01646ff..81dae02 100644 --- a/2238.tex +++ b/2238.tex @@ -473,6 +473,9 @@ This card can achieve higher speed and lower jitter than the isolated 2118/2128 \onecolumn \section{Electrical Specifications} + +Both recommended operating conditions and electrical characteristics are based on the datasheet of the bus transceivers IC (74LVT162245MTD). + \begin{table}[h] \begin{threeparttable} \caption{Recommended Operating Conditions} @@ -493,7 +496,6 @@ This card can achieve higher speed and lower jitter than the isolated 2118/2128 \end{threeparttable} \end{table} The recommended operating temperature is $-40\degree C \leq T_A \leq 85\degree C$. - All specifications are in the recommended operating temperature range unless otherwise noted. \begin{table}[h] @@ -541,7 +543,7 @@ IO direction switches partly decides the IO direction of each bank. \columnbreak \begin{center} \centering - \includegraphics[height=1.8in]{mcx_ttl_switches.jpg} + \includegraphics[height=1.7in]{mcx_ttl_switches.jpg} \captionof{figure}{Position of switches} \end{center} \end{multicols} diff --git a/2245.tex b/2245.tex index f67de2b..7110d15 100644 --- a/2245.tex +++ b/2245.tex @@ -334,6 +334,9 @@ Only shielded Ethernet Cat-6 cables should be connected. \onecolumn \section{Electrical Specifications} + +Information in this section is based on the datasheet of the repeaters IC (FIN1101K8X). + The Absolute Maximum Ratings are thorse values beyond which damage to the device may occur Other specifications should be met without exception. @@ -398,10 +401,6 @@ All typical values of DC specifications are at $T_A = 25\degree C$. Short circuit output current & $I_{OS}$ & & $\pm3.4$ & $\pm6$ & mA & \\ \hline Input current & $I_{IN}$ & & & $\pm20$ & \textmu A & Recommended Input Voltage \\ - \hline - Input capacitance & $C_{IN}$ & & 2.0 & & pF & \\ - \hline - Output capacitance & $C_{OUT}$ & & 2.6 & & pF & \\ \thickhline \end{tabularx} \end{threeparttable} @@ -410,6 +409,7 @@ All typical values of DC specifications are at $T_A = 25\degree C$. \newpage All typical values of AC specifications are at $T_A = 25\degree C$, $V_{ID} = 300mV$, $V_{IC} = 1.3V$ unless otherwise specified. +Information regarding propagation is not applicable due to the lack of trace length matching. \begin{table}[h] \begin{threeparttable} @@ -419,19 +419,13 @@ All typical values of AC specifications are at $T_A = 25\degree C$, $V_{ID} = 30 \textbf{Parameter} & \textbf{Symbol} & \textbf{Min.} & \textbf{Typ.} & \textbf{Max.} & \textbf{Unit} & \textbf{Conditions} \\ \hline - Differential Propagation delay & \multirow{2}{*}{$t_{PLHD}$} & \multirow{2}{*}{0.75} & \multirow{2}{*}{1.1} & \multirow{2}{*}{1.75} & \multirow{2}{*}{ns} & 100\textOmega~ between +/- outputs,\\ - (LOW-to-HIGH) & & & & & & 5pF between each output and GND,\\ - \cline{0-5} - Differential Propagation delay & \multirow{2}{*}{$t_{PHLD}$} & \multirow{2}{*}{0.75} & \multirow{2}{*}{1.1} & \multirow{2}{*}{1.75} & \multirow{2}{*}{ns} & $200 mV \leq V_{ID} \leq 450 mV$,\\ - (HIGH-to-LOW) & & & & & & recommended $V_{IC}$,\\ - \cline{0-5} Differential Output Rise Time & \multirow{2}{*}{$t_{TLHD}$} & \multirow{2}{*}{0.29} & \multirow{2}{*}{0.40} & \multirow{2}{*}{0.58} & \multirow{2}{*}{ns} & duty Cycle = 50\%.\\ (20\% to 80\%) & & & & & & \\ \cline{0-5} Differential Output Fall Time & \multirow{2}{*}{$t_{THLD}$} & \multirow{2}{*}{0.29} & \multirow{2}{*}{0.40} & \multirow{2}{*}{0.58} & \multirow{2}{*}{ns} & \\ (80\% to 20\%) & & & & & & \\ \cline{0-5} - Pulse skew & $t_{SK(P)}$ & & 0.01 & 0.2 & ns & \\ + Pulse width distortion & $PWD$ & & 0.01 & 0.2 & ns & \\ \hline LVDS data jitter, & \multirow{2}{*}{$t_{DJ}$} & & \multirow{2}{*}{85} & \multirow{2}{*}{125} & \multirow{2}{*}{ps} & $PRBS=2^{23}-1$\\ deterministic & & & & & & 800 Mbps\\