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EPT7076_99 [PCA]

Token Ring Transceiver Module; 令牌环收发模块
EPT7076_99
型号： EPT7076_99
厂家： PCA ELECTRONICS INC.    PCA ELECTRONICS INC.
描述：

Token Ring Transceiver Module
令牌环收发模块
文件： 总2页 (文件大小：88K)
中文：  中文翻译
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Token Ring Transceiver Module  
EPT7076  
E L E C T R O N I C S I N C .  
• Optimized for voltage source driving into 150 ohms •  
• 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)  
Insertion Loss  
Return Loss  
Common Mode Rejection  
Crosstalk  
(dB)  
(dB Min.)  
(dB Min.)  
(dB Min.)  
[Xmit/Rcv]  
1-30  
MHz  
Chip Side  
150  
1-16  
MHz  
32  
36  
1-6  
6-17  
MHz  
17-25  
MHz  
1-30  
MHz  
30-100  
MHz  
100-200  
MHz  
200-300  
MHz  
44  
MHz  
MHz  
MHz  
MHz  
Max.  
Min. Max. Min. Max. Min. Max.  
Cable Side Xmit Rcv Xmit Rcv Xmit Rcv  
Xmit Rcv Xmit Rcv Xmit Rcv Xmit Rcv Xmit Rcv Xmit Rcv  
Xmit Rcv  
Xmit Rcv  
-30 -3  
100  
-.8 -.6  
-7  
-1 -25 -3  
-18 -23 -12 -20  
-8 -10 -50 -40 -35 -35 -30 -30 -20 -20  
12 TPHB  
-38  
Schematic  
20 TXOUT  
TX1+ 9  
100 Ω  
150Ω  
TXCT 11  
TX1- 10  
FIN 1  
4 FOUT  
19 TXOUTL  
13 TPHA  
15 RPHB  
18 RXIN  
LPF  
150Ω  
150Ω  
FINL 2  
5 FOUT  
RX0+ 6  
RXCT 8  
FGND 3  
100 Ω  
150Ω  
17 RXINL  
14 RPHA  
RX0- 7  
Package  
A
Dimensions  
(Inches)  
Dim. Min. Max. Nom.  
(Millimeters)  
Min. Max. Nom.  
B
A
B
C
D
E
F
G
H
I
1.090 1.110 1.100 27.69 28.19 27.94  
.260  
.380  
---  
.280  
.400  
---  
.270  
.390  
.950  
.020  
.050  
.135  
.020  
.010  
.075  
.140  
.100  
6.60  
9.65  
---  
7.11  
6.85  
Pin 1 I.D.  
10.16 9.91  
---  
.762  
---  
24.13  
.508  
1.27  
3.43  
.508  
.254  
1.91  
3.56  
2.54  
PCA  
.010  
---  
.030  
---  
.254  
---  
EPT7076  
Date Code  
E
C
J
---  
---  
---  
---  
.016  
.008  
---  
.022  
.012  
---  
.406  
.203  
---  
.559  
.305  
---  
J
L
I
K
K
L
.130  
---  
.150  
---  
3.30  
---  
3.81  
---  
F
G
H
D
CST7076a Rev. B1 1/19/99  
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.  
Token Ring Transceiver Module  
EPT7076  
E L E C T R O N I C S I N C .  
The circuit below is a guideline for interconnecting PCA’s EPT7076 with a typical Token Ring PHY chip for 4 Mb/16Mb  
applications over 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.  
Note that there is no need for the receiver side filtering. So consider this a cost effective solution for almost all Token Ring  
applications using this or similar chips.  
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 of EPT7076. There need not be any ground plane beyond this  
point.  
For best results, PCB designer should design the outgoing traces preferably to be 50 ohms, balanced and well coupled to  
achieve minimum radiation from these traces.  
Typical Application Circuit Connection to TI380C60 (or Equivalent) For NIC.  
Rcv+  
18  
17  
6
7
4
5
3
6
Rcv  
RJ4  
5
PH-B  
PH-A  
Rcv-  
15  
14  
20  
19  
Xmit  
1
+5V  
+5V  
2
7
8
50Ω/2W  
PHOUTA  
PHOUTB  
13  
50Ω/2W  
8
12  
10µF  
10µF  
4
9
5
3
TI380C60  
EPT7076  
10  
1
Xmit+  
Xmit-  
100Ω  
100Ω  
11  
2
Notes : 1. Pins 15 & 14 are left unconnected. Applications vary. Your system may have a phantom drive return  
detection circuit needing pins 15 & 14 to be connected separately or together, can be taken to ground  
via an inductor.  
CST7076b Rev. B1 1/19/99  
PCA ELECTRONICS, INC.  
TEL: (818) 892-0761  
FAX: (818) 894-5791  
http://www.pca.com  
16799 SCHOENBORN ST.  
NORTH HILLS, CA 91343  

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