EPT7061GM [PCA]
Miniature Token Ring Transceiver Module; 微型令牌环收发模块
| 型号： | EPT7061GM |
| 厂家： | 
PCA ELECTRONICS INC. |
| 描述： | Miniature Token Ring Transceiver Module |
| 文件： | 总2页 (文件大小：81K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Miniature Token Ring Transceiver Module
EPT7061GM
E L E C T R O N I C S I N C .
• Ideal for DTR Application with PHY Chip E.G. TI380C60 •
• Optimized for 120Ω •
• Recommended for UTP or STP Transmission •
• Complies with or exceeds IEEE 802.5 Requirements •
Electrical Parameters @ 25° C
Impedance
[Xmit/Rcv]
Insertion Loss
Return Loss
(dB Min.)
Common Mode Rejection
Crosstalk
(dB Min.)
(dB)
(dB Min.)
1-16
MHz
Chip Side 1-16 MHz 32 MHz
Max. Min.
36 MHz
Min.
1-6
MHz
6-17
MHz
17-25
MHz
1-30
MHz
30-100
MHz
100-200
MHz
200-300
MHz
44 MHz
Min.
150
Cable Side Xmit Rcv Xmit Rcv Xmit Rcv
Xmit Rcv Xmit Rcv Xmit Rcv Xmit Rcv Xmit Rcv Xmit Rcv
Xmit Rcv
Xmit Rcv
-.8
-7
-25
-16
-16
-9
-55
-.8
-7
-25 -25 -25
-16
-16
-9
-55 -50 -50 -40 -40 -30
120
-30
-45
Schematic
5
1
7
3
4
Xmit
Filter
120 Ω
150 Ω
8
2
Chip Side
15
Cable Side
9
13
14
Rcv
Filter
120 Ω
10
150 Ω
16
12
Package
Dimensions
(Inches)
Min. Max. Nom. Min. Max. Nom.
(Millimeters)
A
Dim.
J
N
A
B
C
D
E
F
G
H
I
J
K
L
M
N
P
Q
.980
.365
.340
.700
.010
.100
.500
.018
.008
.145
0°
24.89 25.40
1.00
.385
.360
Typ.
.030
Typ.
.520
.022
.012
Typ.
8°
9.27
8.64
9.78
9.14
Pin 1
I.D.
PCA
EPT7061GM
Date Code
17.78 Typ.
Pad
Q
P
B
.254
2.54
.762
Typ.
Layout
12.70 13.21
.457
.203
3.68
0°
.559
.305
Typ.
8°
D
M
.025
.635
1.14
.045
.040
.100
.055
.540
1.02
2.54
E
C
K
1.40
13.72
L
I
G
H
F
CST7061GMa Rev. 2 2/27/98
PCA ELECTRONICS, INC.
16799 SCHOENBORN ST.
NORTH HILLS, CA 91343
TEL: (818) 892-0761
FAX: (818) 894-5791
http://www.pca.com
Product performance is limited to specified parameters. Data is subject to change without prior notice.
Miniature Token Ring Transceiver Module
EPT7061GM
E L E C T R O N I C S I N C .
The circuit below is a guideline for interconnecting PCA’s EPT7061GM with a typical Token Ring PHY chip for 4 Mb/16Mb
applications over STP or UTP cable. Further details of system design should be obtained from the specific chip
manufacturer. Note that this module is optimized for a “voltage source” driver such as TI380C60. Only one type of cable
should be driven by the module: either UTP or STP.
Note that the two channels have identical filtering and other magnetics . This option is seen to be widely used by system
designers when designing dedicated Token Ring systems.
The pull down resistors to chassis via a cap shown around the RJ45 connector have been known to suppress unwanted
radiation that unused wires pick up from the immediate environment. This is specially true if driving UTP cable. Their
placement and use are to be considered carefully before a design is finalized.
No specific recommendation is made here for phantom return circuitry: implementation varies. Please note that additional
emission control has been observed if both nodes of the phantom bypass capacitor on the transmit channel are pulled to
the chassis ground via suitable capacitors.
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 EPT7061GM. There need not be any ground plane beyond
this point.
For best results, PCB designer should design the outgoing traces preferably to be 50Ω (UTP), balanced and well coupled to
achieve minimum radiation from these traces.
Typical Application Circuit Connection to TI380C60 (or Equivalent). Only NIC side shown.
Rcv-
4
2
1
3
4
7
8
9
Rcv±
5
3
6
RJ45
Rcv+
PH-B
PH-A
Xmit±
+5V
10
+5V
1
2
7
8
50Ω/2W
PHOUTA
PHOUTB
14
50Ω/2W
10µF
13
10µF
DTR PHY
Xmit+
Xmit-
15
16
100Ω
100Ω
EPT7061GM
Notes : 1. Pins 3 & 4 are left unconnected. Applications vary. Your system may have a phantom drive return
detection circuit needing pins 3 & 4 to be connected separately.
CST7061GMb Rev. 2 2/27/98
PCA ELECTRONICS, INC.
16799 SCHOENBORN ST.
NORTH HILLS, CA 91343
TEL: (818) 892-0761
FAX: (818) 894-5791
http://www.pca.com
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