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LAN91C94 Datasheet(PDF) 13 Page - SMSC Corporation

Part # LAN91C94
Description  ISA/PCMCIA SINGLE CHIP ETHERNET CONTROLLER WITH RAM
PDF  120 Pages
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Manufacturer  SMSC [SMSC Corporation]
Direct Link  http://www.smsc.com
Logo SMSC - SMSC Corporation

LAN91C94 Datasheet(HTML) 13 Page - SMSC Corporation

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13
PIN NUMBER
QFP
VTQFP/
TQFP
NAME
SYMBOL
BUFFER
TYPE
DESCRIPTION
96
97
94
95
Crystal 1
Crystal 2
XTAL1
XTAL2
Iclk
An external parallel resonance 20MHz
crystal should be connected across
these pins. If an external clock source
is used, it should be connected to
XTAL1 and XTAL2 should be left open
85
84
83
82
AUI Receive
RECP
RECN
Diff. Input
AUI receive differential inputs
79
78
77
76
AUI
Transmit
TXP/
nCOLL
TXN/nCRS
Diff.
Output
I
INTERNAL ENDEC - (nXENDEC pin
open). In this mode, TXP and TXN are
the AUI transmit differential outputs.
They must be externally pulled up
using 150 ohm resistors
EXTERNAL ENDEC - (nXENDEC pin
tied low). In this mode the pins are
inputs used for collision and carrier
sense functions
83
82
81
80
AUI
Collision
COLP
COLN
Diff.
Input
AUI
collision
differential
inputs.
A
collision is indicated by a 10MHz signal
at this input pair
87
86
85
84
TPE
Receive
TPERXP
TPERXN
Diff.
Input
10BASE-T receive differential inputs
77
75
75
73
TPE
Transmit
TPETXP
TPETXN
Diff.
Output
INTERNAL
ENDEC
-
10BASE-T
transmit differential outputs
74
76
72
74
TPE
Transmit
Delayed
TPETXDP
TPETXDN
Diff.
Output
10BASE-T delayed transmit differential
outputs. Used in combination with
TPETXP and TPETXN to generate the
10BASE-T transmit pre-distortion
68
66
Transmit
Clock
PWRDWN/
TXCLK
I with
pullup
INTERNAL
ENDEC
-
Powerdown
input.
It
keeps
the
LAN91C94
in
powerdown mode when high (open).
Must be low for normal operation
EXTERNAL ENDEC - Transmit clock
input from external ENDEC.
90
88
Bias
Resistor
RBIAS
Analog
Input
A 22kohm 1% resistor should be
connected between this pin and analog
ground



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