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

ISDN-S Interface Dual Transformers

TEL: (818) 892-0761

FAX: (818) 894-5791

http://www.pca.com

PCA ELECTRONICS, INC.

16799 SCHOENBORN ST.

NORTH HILLS, CA 91343

• Opitmized for Leading Transceiver I.C.’s

• Meets or exceeds UL1459, UL1950 & EN60950 Standards

• Meets CCITT 1.430 Four Wire “S” Interface

• 2000 Vrms Isolation

EPR1251G-EPR1254G

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

Electrical Parameters @ 25°C

Unless Otherwise Specified Dimensions are in Inches /mm ± .010 /.25

CSR1251G-R1254G Rev. 1

6/16/03 JDG

Schematics

Package

.690

(17.52)

0°-8°

.035

(.889)

.008/.012

(.203/.305)

Solder Pad

Layout

.750

(19.05)

.100

(2.54)

.030

(.762)

.085

(2.16)

.290

(7.37)

.100

(2.54)

.018/.022

(.457/.559)

.005/.015

(.127/.381)

PCA

EPR125XG

D.C.

.940

(23.88)

.580

(14.73)

.120

(3.05)

.700

(17.78)

Pin 1

I.D.

12

16

4

3

14

13

15

56

12

8

7

10

9

11

Secondary

(Chip Side)

Primary

(Line Side)

LI

(µH Max.)

5 / 5

5 / 15

15 / 15

35 / 35

Pri. DCR

(

Ω Max.)

2.4 / 2.4

2.4 / 2.4

2.5 / 2.5

2.5 / 2.5

OCL

(mH Min.)

22 / 22

22 / 22

22 / 22

22 / 22

Part

Number

EPR1251G

EPR1252G

EPR1253G

EPR1254G

2.4 / 2.4

2.4 / 4.0

4.0 / 4.0

6.0 / 6.0

Sec. DCR

(

Ω Max.)

Primary

Pins

1,4 / 5,8

1,4 / 5,8

1,4 / 5,8

1,4 / 5,8

100 / 100

100 / 100

100 / 100

100 / 100

Cw/w

(pF Max.)

Turns

Ratio

1:1 / 1:1

1:1 / 1:2

1:2 / 1:2

1:2.5 / 1:2.5