LAN
10/100 BASE-T
Single Port Transformer Modules
8240-8247
• Meets all IEEE 802.3 and ANSI X3.263 standards including
350µH OCL with 8mA bias
• IC grade transfer-molded package suitable for reflow soldering
temperatures up to 235°C
• Applicable with AMD, Kendin Semiconductor and Quality
Semiconductor transceivers
MECHANICAL AND SCHEMATIC
(All dimensions in inches)
SUGGESTED PAD LAYOUT
SCHEMATIC 1
TRANSMIT
1
2
3
RECEIVE
6
7
8
10
9
11
1
3
2
15
14
16
16
14
15
SCHEMATIC 2
TRANSMIT
10
12
11
RECEIVE
7
5
6
TRANSMIT
16
14
15
RECEIVE
1
3
2
7
5
6
12
10
12
11
NOTE: 8245 incorporates an autotransformer, so there is
no connection to the TX transformer center tap.
SCHEMATIC 3
ELECTRICAL SPECIFICATIONS @ 25˚C
Turns Ratio
(±5%)
Receive
Transmit
Insertion Loss
100 kHz - 100 MHz
(dB MAX)
Return Loss
(dB MIN)
30 MHz
60 MHz
80 MHz
30 MHz
Crosstalk
(dB MIN)
60 MHz
100 MHz
Part
Number
Schematic
Hipot
(Vrms MIN)
8240 - 8247
8240
8241
8242
8243
8244
8245
8246
8247
1:1
1:1
1:1
1:1
1:1
1:1
1:1
1:1
√2:1
√2:1
√2:1
√2:1
1.25:1
1: √2
√2:1
1:√2
-1.0
-1.0
-1.0
-1.0
-1.0
-2.0
-1.0
-2.0
-16
-16
-16
-16
-16
-18
-16
-16
-12
-12
-12
-12
-12
-12
-12
-11
-10
-10
-10
-10
-10
-11
-10
-10
-45
-45
-45
-45
-45
-45
-45
-45
-38
-38
-38
-38
-38
-38
-38
-38
-34
-34
-34
-34
-34
-34
-34
-34
ISSUE: A 16/11/01
1
2
1
3
1
3
1
3
1500
1500
1500
1500
1500
1500
1500
1500
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