PCA EPF8061SM

10/100 Base-X Module for
Multi-Port Applications
ELECTRONICS INC.
EPF8061SM
• Recommended for DP83840A/DP83223(A), ICS1890 & TSC78Q2120 •
• Significantly improved common mode attenuation •
• Transfer molded part with improved lead integrity for SMD processing •
• Guaranteed to operate with 8 mA DC bias at 70°C •
• Complies with or exceeds IEEE 802.3, 10 BT/100 BX Standards •
Electrical Parameters @ 25° C
Insertion Loss
(dB Max.)
OCL
@ 70°C
100 KHz, 0.1 Vrms
8 mA DC Bias
Media Side
0.1-80
MHz
80-100
MHz
Return Loss
(dB Min.)
150
MHz
1-30
MHz
Common Mode Rejection
(dB Min.)
30-60
MHz
100
MHz
30-100
MHz
200-300
MHz
Crosstalk (dB Min.)
[Between Channels]
400-500
MHz
0.1-60
MHz
100
MHz
-35
-30
Xmit Rcv Xmit Rcv Xmit Rcv Xmit Rcv Xmit Rcv Xmit Rcv Xmit Rcv Xmit Rcv Xmit Rcv
350µH
-1
-1
-1
•
-1
-2
-2
-18
Isolation : 1500 Vrms •
-18
-18
-18
-10
-10
-40
-40
-30
-20
Impedance : 100 Ω • Rise Time : 3.0 nS Max.
-20
-15
•
Schematic
Receive Channel
Transmit Channel
6, 16
35, 25
2, 12
39, 29
7, 17
34, 24
3, 13
38, 28
33, 23
4, 14
Media
Side
Chip
Side
8, 18
Chip
Side
37, 27
1 CT:1CT
1 CT:1CT
Media
Side
Dimensions
Package
A
N
J
Pin 1
I.D.
PCA
EPF8061SM
Date Code
B
Q
40
21
P
Solder Pad Layout
1
20
D
M
Dim.
Min.
A
B
C
D
E
F
G
H
I
J
K
L
M
N
P
Q
1.110
.470
.235
.950
.010
.050
.590
.016
.008
.085
0°
.025
(Inches)
Max. Nom.
(Millimeters)
Min.
Max. Nom.
28.19
11.94
5.97
24.13
.254
1.27
14.97
.203
2.16
0°
.635
1.130
.490
.255
Typ.
.015
Typ.
.610
.022
.012
Typ.
8°
.045
.030
.050
.090
.670
28.70
12.45
6.48
Typ.
.381
Typ.
15.49
.559
.305
Typ.
8°
1.14
.762
1.27
2.29
17.02
K
C
F
H
E
L
I
G
PCA ELECTRONICS, INC.
16799 SCHOENBORN ST.
NORTH HILLS, CA 91343
CSF8061SMa Rev. 3 11/10/97
Product performance is limited to specified parameters. Data is subject to change without prior notice.
TEL: (818) 892-0761
FAX: (818) 894-5791
http://www.pca.com
10/100 Base-X Module for
Multi-Port Applications
ELECTRONICS INC.
EPF8061SM
The circuit below is a guideline for interconnecting PCA’s EPF8061SM with ICS 1890 chip for 10/100 Mb/s applications.
Further details can be obtained from the chip manufacturer application notes. Connection to the alternative chips such as
TSC 78Q2120 or DP83840A/DP83223(A) is straight forward; please consult appropriate data sheet recommendations for
completing this project.
Typical insertion loss of the isolation transformer is 0.5dB. This parameter covers the entire spectrum of the encoded
signals in 10/100 protocols. Under terminated conditions, to transmit a 2V pk-pk signal across the cable, you must adjust
the chips supporting resistor to get at least 2.12V pk-pk across the transmit pins.
Primary side center taps can be returned to the chip side ground plane; but more often than not, if the ground plane is itself
noisy, field experience has shown that it may worsen EMI situation. It is perhaps wiser to carefully lay the system borad
so that substantial gain in EMI suppression is obtained from the so called “common mode termination” on the cable side as
shown below. In any event, this configuration has been known to be quite successful in the field in EMI containment for
similar applications.
The phantom resistors shown around the connector have been known to suppress unwanted radiation that unused wires
pick up from the immediate environment. Their placement and use are to be considered carefully before a design is
finalized.
It is recommended that there be a neat separation of ground planes in the layout. It is generally accepted practice to limit
the plane off at least 0.05 inches away from the chip side pins of EPF8061SM. There need not be any ground plane beyond
this plane.
For best results, PCB designer should design the outgoing traces preferably to be 50 Ω, balanced and well coupled to
achieve minimum radiation from these traces.
Typical Application Circuit for UTP (only one port shown)
5Vcc
35
1
33
2
3
2
37
6
TX-
4
34
RX+
6
38
RX-
8
49.9Ω
39
TX+
49.9Ω
ICS
1890
49.9Ω
49.9Ω
3
Rcv
Xmit
RJ45*
75Ω
75Ω
4
5
75Ω
7
7
8
EPF8061SM
High Voltage
Capacitor
CM Capacitor
Chassis
Ground
Notes : Only one port shown for Hub side connection.
PCA ELECTRONICS, INC.
16799 SCHOENBORN ST.
NORTH HILLS, CA 91343
CSF8061SMb Rev. 3
11/10/97
TEL: (818) 892-0761
FAX: (818) 894-5791
http://www.pca.com