ISDN U Interface Transformers
E L E C T R O N I C S I N C .
• Optimized for Leading Transceiver I.C.’s •
• Meets or exceeds UL1459 & IEC950 Standards •
• 2000 Vrms Isolation •
• See Selection Guide for I.C. Cross Reference •
Electrical Parameters @ 25° C
Part
Number
Turns
Ratio
OCL
(mH)
IDC
(mA Max.)
DCR (Line Side)
DCR (Chip Side)
Line Side
Pins
Schematic
P.C.
Patern
(Ω Max.)
(Ω Max.)
EPR1136
EPR1137
EPR1138
EPR1139
EPR1147
1:.75:.75
1:1:1.25
77
30
60
80
80
80
17
2.2
7
13.5
2
3, 5
3, 5
1, 7
1, 7
1,11
A
A
B
B
C
1
1
1
1
2
13.05-15.95
25.65-28.35
25.65-28.35
26.60-29.40
1:1.6CT:1
1:1.33CT:1
1.25:1
5.5
1.5
7.5
14
10
Schematic
A
B
C
6
3
5
4
5
4
3
7
5
2
7
2
7
1
12
2
11
1
8
Package
P.C PATTERN
COMPONENT SIDE
(1)
White Dot
Pin 1 I.D
G
I
F
K
7
8
Dimensions
1
2
PCA
EPR11XX
D.C.
(Inches)
(millimeters)
Nom.
F
Min.
Dim.
Max. Nom. Min.
Max.
6
5
A
B
C
E
F
G
H
I
---
---
1.020 .985
---
---
25.91 25.02
20.32 19.81
17.15 16.51
.800
.675
---
.780
.650
.130
.100
.100
.024
.039
.048
3
4
---
---
A
.100
---
2.54
---
---
---
3.30
2.54
2.54
.610
.991
1.22
G
---
(2)
---
---
---
---
.022
---
.028
---
.559
---
.711
---
G
I
F
K
K
---
---
---
---
11
3
12
10
1
2
C
E
F
8
7
9
4
H
5
6
CSR1136 - CSR1147 Rev. 2 10/26/99
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.