Part Number: LP3964 I'm reading through the datasheet here and Section 8.2.2.1 describes the ESR requirements of the input and output capacitors. For example:
C IN ESR (m Ω ) / C IN (μF) ≤ 1.5
0.2 Ω ≤ C OUT ESR ≤ 5 Ω
However, what at what…
Hi Gareth,
Please attached note DS16EV5110 EVM user guide. This document has schematic of this board as well.
Regards, Nasser
4885.DS16EV51-AEVKC_UsrGuide10232008.pdf
Ross,
I only want to check the phy. Here is what I have done. I removed the 25mhz osc and put on the 50mhz. I removed the c3,c4 and y1 and installed and populated the jumper J6 to make it only RMII mode. I have the BERT running at 100M. I thought I…
Hi Jeff,
The PFB part of the circuit looks good, assuming C116, C117, C118 are 0.1uF. I am also attaching the schematics of DP83848I-POE-EK for reference.
What voltage are you measuring near those pins 18,37, 23?
Regards, Rahul 5751.DP83848 POE…
Mike,
We sometimes see better EMC performance on boards with common mode choke towards the PHY side.
Unfortunately we dont have a list of recommended or a "must-not" have list of RJ-45 connectors for PoE applications. While doing a research on recommendations…
Part Number: DP83848I-POE-EK Other Parts Discussed in Thread: DP83848I , Hi,
I am trying to use DP83848i in SNI mode to communicate with the processor MC68360.
I got the eval board DP83848I-POE-EK for this Ethernet chip (Schematic attached).
Jumper…
Hi, Rob!
The DP83849IF has a PECL driver on the receive and transmit lines. This is described in clauses 7.3.1, 7.3.2 of the technical specification for the DP83849IF chip. The analysis of the optical transceiver connection schemes in the documents…
