ISDN-S Interface Transformers
E L E C T R O N I C S I N C .
• Optimizied for Leading Transceiver I.C.’s •
• Meets CCITT 1.430 Four Wire “S” Interface •
• Meets or exceeds UL1459, UL1950 & EN60950 Standards •
• 2000 Vrms Isolation •
• See Selection Guide for I.C. Cross Reference •
Electrical Parameters @ 25° C
Turns
Ratio
OCL
Cw/w
LI
Pri. CD
Pri. DCR
Sec. DCR
Schematic
Part
(mH Min.)
(pF Max.)
(µH Max.)
(pf Max.)
(Ω Max.)
(Ω Max.)
Number
EPR1226
EPR1227
EPR1228
EPR1229
1:1 / 1:1
1:1 / 1:2
22
22
22
22
100
100
100
100
5
2.4
2.5
2.5
2.5
2.4
4.2
4.3
5.8
A
A
B
B
42
160
80
15
15
30
1:2 / 1:2
1:2.5 / 1:2.5
150
Schematic
A
B
Pri.
1
Sec.
16
Pri.
5
Sec.
12
2
3
4
15
14
13
6
7
8
11
10
9
Package
A
PCA
Pin 1
EPR12XX
Date Code
B
E
I.D.
Dimensions
(Inches)
Max. Nom. Min.
(millimeters)
Min.
Nom.
Max.
C
Dim.
A
B
C
D
E
F
.900 .920 .910 22.86 23.37
.540 .560 .550 13.72 14.22
23.11
13.97
9.91
.380 .400 .390
--- --- .700
.110 .150 .130
--- --- .100
.395 .405 .400 10.03 10.29
9.65 10.16
--- ---
2.79 3.81
--- ---
G
D
17.78
3.30
2.54
10.16
.635
G
H
.024 .027 .025
.610 .686
H
F
CSR1226 - CSR1229 Rev. - 3/12/99
PCA ELECTRONICS, INC.
16799 SCHOENBORN ST.
NORTH HILLS, CA 91343
TEL: (818) 892-0761
FAX: (818) 894-5791
http://www.pca.com
Product performance is limited to specified parameters. Data is subject to change without prior notice.