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RE: Clause 45: MDIO Electrical Specifications

Title: Clause 45: MDIO Electrical Specifications
Why not raising the max to 1.8V?
 
Farzin Firoozmand
-----Original Message-----
From: Rabinovich, Rick [mailto:rick.rabinovich@xxxxxxxxxxxxxx]
Sent: Tuesday, February 27, 2001 10:21 AM
To: stds-802-3-hssg@xxxxxxxx
Subject: Clause 45: MDIO Electrical Specifications

To All,

Table 45-41 indicates a maximum VIH = 1.5V. Why is it so restrictive?

I suggest that the inputs should be resilient to LVTTL levels (3.3V Nominal), otherwise system manufacturers will be forced to provide additional voltages and logic to support a 2-wire management bus.

Cordially,

Rick Rabinovich
Hardware Group Lead Engineer
System Architect
Spirent Communications
26750 Agoura Road
Calabasas, CA 91302
Phone: 818-676-2476
Fax    : 818-880-9293
Email: rick.rabinovich@xxxxxxxxxxxxxx