LAN91C111 datasheet(15/125 Pages) MICROCHIP

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DS00002276A-page 15

LAN91C111

6.0

SIGNAL DESCRIPTION PARAMETERS

This section provides a detailed description of each Microchip LAN91C111 signal. The signals are arranged in functional

groups according to their associated function.

The ‘n’ symbol at the beginning of a signal name indicates that it is an active low signal. When ‘n’ is not present before

the signal name, it indicates an active high signal.

The term “assert” or “assertion” indicates that a signal is active; independent of whether that level is represented by a

high or low voltage. The term negates or negation indicates that a signal is inactive.

The term High-Z means tri-stated.

The term Undefined means the signal could be high, low, tri-stated, or in some in-between level.

6.1

Buffer Types

DC levels and conditions defined in the DC Electrical Characteristics section.

Output buffer with 2mA source and 4mA sink

O12

Output buffer with 6mA source and 12mA sink

O16

Output buffer with 8mA source and 16mA sink

O24

Output buffer with 12mA source and 24mA sink

OD16

Open drain buffer with 16mA sink

OD24

Open drain buffer with 24mA sink

I/O4

Bidirectional buffer with 2mA source and 4mA sink

I/O24

Bidirectional buffer with 12mA source and 24mA sink

I/OD

Bidirectional Open drain buffer with 4mA sink

Input buffer

Input buffer with Schmitt Trigger Hysteresis

Iclk

Clock input buffer

I/O

Differential Input

O/I

Differential Output

5V tolerant. Input pins are able to accept 5V signals

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