I've been shopping around for Ethernet jacks for use in a personal project. The part specifically states that it's internal PHYs are 100BASE-TX/10BASE-T/Te IEEE 802.3
I understand the basic difference between 100Base-T and 100Base-TX, but I guess I don't understand why an Ethernet jack and/or the magnetics need to be spec'd for this. It's all getting clocked through the wire at ~125MHz, right?
Digikey seems to differentiate between -TX and -T. Mouser's parametric search doesn't mention anything like the connection speed and is very unhelpful, showing me stuff with and without magnetics.
The 100Base-TX jacks with mags seem to be more expensive than -T (on Digikey) so that leads me to believe some timing requirement of 100Base-TX require entirely different magnetics specs or something. But if it doesn't matter, I certainly don't want to spend $4 on a jack when I could spend only $1.60.
Any advice? I'd appreciate it!
Best Answer
Are you sure? Maybe between 10BASE-T (original Ethernet) and 100BASE-TX (Fast Ethernet)? Or between 1000BASE-T (Gigabit Ethernet) and 100BASE-TX?
Both 10BASE-T and 100BASE-TX work over two twisted pairs at once. While 1000BASE-T works over four pairs at once.
Making it shorter, people often write simply but mistakenly 10/100BASE-TX or 10/100BASE-T instead of proper 10BASE-T/100BASE-TX or 10BASE-Te/100BASE-TX to indicate that a MagJack support both (original and Fast) protocols.
Therefore: