Cirrus Logic CS8900A - Manual (Page 122)

122 DS271F5
CS8900A
Crystal LAN™ Ethernet Controller
CIRRUS LOGIC PRODUCT DATASHEET
7.6 AUI WIRING
7.7 QUARTZ CRYSTAL REQUIREMENTS
(If a 20 MHz quartz crystal is used, it must meet the fol-
lowing specifications)
Parameter Min Typ Max Unit
Parallel Resonant Frequency - 20 - MHz
Resonant Frequency Error (C
L
= 18 pF) -50 - +50 ppm
Resonant Frequency Change Over Operating Temperature -40 - +40 ppm
Crystal Capacitance - - 18 pF
Motional Crystal Capacitance - 0.022 - pF
Series Resistance - - 50 Ohm
Shunt Capacitance - - 7 pF
CS8900A
DO +
DO -
1 : 1
DB15
3
10
Tx
4
1 : 1
5
12
13 6
+12 V
+
CI +
CI -
1 : 1
2
9
39.2 Ω
39.2
Ω
Col 0.01 uF
-
+
DI +
DI -
39.2
Ω
39.2
Ω
Rx 0.01 uF
-