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