AM79C973KCW Advanced Micro Devices, AM79C973KCW Datasheet - Page 231

• Manufacturer Part Number: AM79C973KCW
• Description: PCnet-FAST III Single-Chip 10/100 Mbps PCI Ethernet Controller with Integrated PHY
• Manufacturer: Advanced Micro Devices

EXTERNAL CLOCK
F
t
t
t
t
t
Frequency
Drive Level
Load Capacitance
Frequency Stability
ESR
PER
PWH
PWL
RISE
FALL
XTAL1
Parameter
Symbol
Item
Component
Crystal
Crystal
Crystal
Table 64. Clock (XTAL1, XCLK = 1) Switching Characteristics
XTAL1 Frequency
XTAL1 Period
XTAL1 High Time
XTAL1 Low Time
XTAL1 Rise Time
XTAL1 Fall Time
Table 65. Crystal (XTAL1, XTAL2, XCLK = 0) Requirements
Table 66. Crystal (XTAL1, XTAL2, XCLK = 0) Requirements
Parameter Name
Figure 52 External Clock Timing
Test Condition
P R E L I M I N A R Y
Am79C973/Am79C975
@ 0.4 V
@ 0.4 V
@ 0.3 V
over 0.4 V
over 0.4 V
Epson America
Manufacturer
Ecliptek
Ecliptek
Test Condition
DD
DD
DD
DD
DD
(3.3V)
(3.3V)
(3.3V)
(3.3V)
(3.3V)
Min
Min
18
18
1
1
-
-
-
-
-
-
-
Nom
Nom
25
40
22
22
25
18
4
4
-
-
-
ECSM-AT-25.000M
MA-505-25.000M
EC-AT-25.000M
Part Number
50 to 100
Max
Max
50
-
-
-
-
-
-
-
ohms
MHz
MHz
Unit
V/ns
V/ns
Unit
ppm
mW
pF
ns
ns
ns
231