LAN9118MT Standard Microsystems (SMSC), LAN9118MT Datasheet - Page 169

• Manufacturer Part Number: LAN9118MT
• Manufacturer: Standard Microsystems (SMSC)

High-Performance Single-Chip 10/100 Non-PCI Ethernet Controller
Datasheet
SMSC LAN9118
8.5
The LAN9118 can accept either a 25MHz crystal (preferred) or a 25 MHz clock oscillator (±50 PPM)
input. The LAN9118 shares the 25MHz clock oscillator input (CLKIN) with the crystal input
XTAL1/CLKIN (pin 6).
The Input Clock Duty Cycle is 40% minimum, 50% typical and 60% maximum.
It is recommended that a crystal utilizing matching parallel load capacitors be used for the LAN9118
crystal input/output signals (XTAL1, XTAL2). See table below for crystal specifications.
Additionally, SMSC recommends a series resistor for the crystal circuit. Further details are provided in
SMSC Application Note AN10.7 - “Parallel Crystal Circuit Input Voltage Control” and in the LAN9118
Reference Schematic.
Clock Circuit
Frequency Stability Over Temp
Frequency Tolerance @ 25° C
Operating Temp Range
Shunt Capacitance
Load Capacitance
Fox Electronics
Drive Level
LAN9118 RECOMMENDED CRYSTALS
LAN9118 CRYSTAL SPECIFICATIONS
LAN9118 RECOMMENDED CRYSTALS
LAN9118 CRYSTAL SPECIFICATIONS
DATASHEET
169
20 pF ~ Parallel
0° C to 70° C
FOXS/250F-20
±50 PPM
±50 PPM
0.5 mW
7.0 pF
Revision 1.0 (03-17-05)