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 chan
g
e 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
43
14 1315
56
12
87
10 911
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
