ISDN-S Interface Dual Transformers
E L E C T R O N I C S I N C .
EPR1251G-EPR1254G
• 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
Electrical Parameters @ 25°C
Turns
Ratio
OCL
Cw/w
LI
Pri. DCR
Sec. DCR
Part
Primary
Pins
(mH Min.)
(pF Max.)
(µH Max.)
(Ω Max.)
(Ω Max.)
Number
1,4 / 5,8
1,4 / 5,8
1,4 / 5,8
1,4 / 5,8
EPR1251G
EPR1252G
EPR1253G
EPR1254G
1:1 / 1:1
22 / 22
22 / 22
22 / 22
22 / 22
100 / 100
100 / 100
100 / 100
100 / 100
5 / 5
2.4 / 2.4
2.4 / 2.4
2.5 / 2.5
2.5 / 2.5
2.4 / 2.4
2.4 / 4.0
4.0 / 4.0
6.0 / 6.0
1:1 / 1:2
5 / 15
1:2 / 1:2
15 / 15
35 / 35
1:2.5 / 1:2.5
Schematics
16 15 14 13
12 11 10
9
8
Secondary
(Chip Side)
Primary
(Line Side)
3
4
7
1
2
5
6
Package
.940
(23.88)
.085
.120
.100
(2.16)
(3.05)
(2.54)
PCA
EPR125XG
D.C.
.580
.750
(19.05)
Solder Pad
Layout
(14.73)
Pin 1
I.D.
.700
.030
(.762)
(17.78)
.005/.015
.008/.012
.290
(.127/.381)
(.203/.305)
(7.37)
0°-8°
.035
(.889)
.690
(17.52)
.100
.018/.022
(2.54)
(.457/.559)
Unless Otherwise Specified Dimensions are in Inches /mm
.010 /.25
Product performance is limited to specified parameters. Data is subject to change without prior notice.
CSR1251G-R1254G Rev. 1 6/16/03 JDG
PCA ELECTRONICS, INC.
16799 SCHOENBORN ST.
NORTH HILLS, CA 91343
TEL: (818) 892-0761
FAX: (818) 894-5791
http://www.pca.com