Token Ring Transceiver Module
ELECTRONICS INC.
EPT7055AM
• Optimized for voltage source driving into 150Ω •
• Enhanced Common Mode performance over UTP •
• Robust construction allows for solder reflow processes •
• Complies with or exceeds IEEE 802.5 Requirements •
Electrical Parameters @ 25° C
Impedance
(Ω)
[Xmit/Rcv]
Chip Side
150
100
1-16
MHz
Insertion Loss
(dB Max.)
32
MHz
36
MHz
44
MHz
1-8
MHz
Return Loss
(dB Min.)
8-17
MHz
17-24
MHz
1-30
MHz
Common Mode Rejection
(dB Min.)
30-100
MHz
100-200
MHz
200-300
MHz
Rcv
-17
-50
Crosstalk
(dB Min.)
10
MHz
Cable Side
Xmit Rcv Xmit Rcv Xmit Rcv Xmit Rcv Xmit Rcv Xmit
-.6
-.5
-7
-1
-25
-3
-3.5
-3
-18
-23
-12
Rcv Xmit
-20
-8
Rcv Xmit Rcv Xmit Rcv Xmit Rcv Xmit
-10
-57
-40
-35
-35
-30
-29
-20
Schematic
TX1+ 2
150Ω
TX1- 4
CT- 5
RX0+ 6
150Ω
RX0- 8
RXCT 7
1 : .817
LPF
1 : .817
14 TXO+
3.01KΩ
.1
µF
R1
4.75KΩ
13 TXO-
9 PHA
12 RX1+
UTP
.1
µF
R2
11 RX1-
10 PHB
Package
A
B
Pin 1 I.D.
PCA
EPT7055AM
Date Code
Dim.
A
B
C
D
E
F
G
H
I
J
Dimensions
(Inches)
Min. Max. Nom.
1.480
.265
.450
1.300
.010
.100
.100
.020
.010°
.135
1.500
.275
.460
Typ.
.015
.140
.120
.024
Typ.
.140
(Millimeters)
Min.
Max. Nom.
37.85
6.73
11.43
33.02
.254
3.18
2.54
.508
.254
3.43
38.10
6.99
11.68
Typ.
.381
3.56
Typ.
.610
Typ.
.356
C
E
H
D
F
G
I
J
PCA ELECTRONICS, INC.
16799 SCHOENBORN ST.
NORTH HILLS, CA 91343
CST7055AMa
Rev. A 6/11/97
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
PCA [ PCA ELECTRONICS INC. ]
