Insertion Loss

(dB Max.)

Common Mode Rejection

(dB Min.)

Return Loss

(dB Min.)

1-16

MHz

1-30

MHz

-15

-15

30-100

MHz

-10

100

MHz

-70

Crosstalk

(dB Min.)

-35

1-30

MHz

200-300

MHz

32

MHz

36

MHz

1-6

MHz

6-17

MHz

17-25

MHz

Xmit

Rcv Xmit

Rcv Xmit

Rcv Xmit Rcv Xmit Rcv Xmit

Rcv

-35

-45

-.8

Xmit Rcv

-.8

-7

Xmit Rcv

-1

-20

-25

Xmit Rcv

-1

-20

-15

-70

-30

-45

Electrical Parameters @ 25

° C

Token Ring Transceiver Module

CST7045GMa

Rev. -

10/5/96

• Optimized for Texas Instrument’s TMS38054 •

• Supports both UTP and STP Transmission •

• Overvoltage Protection Circuit •

• Complies with or exceeds IEEE 802.5 Requirements •

Schematic

Dimensions

A

B

C

D

E

F

G

H

I

J

K

L

M

N

P

Q

Dim.

1.290

.575

.300

1.110

.003

.100

.780

.015

.008

.090

0

°

.025

Min.

1.310

.585

.320

Typ.

.020

Typ.

.800

.021

.012

Typ.

8

°

.045

Max.

.030

.100

.092

.800

Nom.

(Inches)

(Millimeters)

32.77

14.60

7.62

28.19

0.076

2.54

19.81

.381

.203

2.28

0

°

.635

Min.

33.27

14.86

8.13

Typ.

.508

Typ.

20.32

.533

.305

Typ.

8

°

1.14

Max.

.762

2.54

2.34

20.32

Nom.

Package

EPT7045GM

150/100

Cable Side

Xmit

Rcv

-20

-20

44

MHz

-35

Xmit Rcv

-1

E L E C T R O N I C S I N C .

Tx+ 12

Tx- 10

Gnd 2 9

Ph- 13

Ph+ 14

Vcc 2 11

17 Tu-

16 Ts-

18 Tu+

19 Ch Gnd

Xmit

Filter

15 Ts+

Gnd 1 3

Rx+ 2

Rx- 4

PhRet B 5

Vcc 1 1

21 Ru+

23 Rs-

22 Rs+

20 Ru-

PhRet A 6

CMF

600/150

Chip Side

Impedance

Matching

Network

CMF

Pin 1

I.D.

C

D

E

B

F

L

A

H

P

N

M

Q

G

PCA

EPT7045GM

Date Code

Pad

Layout

J

K

I

TEL: (818) 892-0761

FAX: (818) 894-5791

http://www.pca.com

PCA ELECTRONICS, INC.

16799 SCHOENBORN ST.

NORTH HILLS, CA 91343

Impedance

[Xmit/Rcv]

Product performance is limited to specified parameters. Data is subject to change without prior notice.