TYPE 28Z - SMD TRANSFORMERS
T1/CEPT/ISDN-Pri Interface
FEATURES
SMD package for pick and place assemply.
Designed for vapor phase and IR reflow soldering.
Designed to meet FCC and CCITT G.703.
Meets UL1459 and UL1950.
Available for both standard temperature and
extended temperature applications.
PACKAGE
0.01-0.02
0.25-0.51
SCHEMATICS
1
2
12
1
2
10
9
8
6
7
6
7
3
4
10
9
12
1
2
3
4
5
6
12
11
10
9
8
7
6
7
1
2
3
4
12
11
10
9
VITEC
28ZXXX
0.600 MAX
15.24 MAX
0.400 MAX
10.16 MAX
3
4
0.650 MAX
16.51 MAX
Coplanarity is +/- 0.004/0.10
0.340
8.64
A
1
2
3
4
10
9
12
1
2
3
4
12
11
10
9
8
7
6
7
B
1
2
3
4
5
6
10
9
8
7
12
C
1
12
11
3
4
10
9
8
6
7
D
0.100
2.54
0.030
0.76
Dimensions Inches/mm +/- 0.01" Unless noted
5
6
E
F
G
H
ELECTRICAL CHARACTERISTICS @ 25
o
C
Part
Number
Turns Ratio
Ratio
+/- 5%
OCL
mH
MIN
1.20
1.20
1.20
1.20
1.50 & 1.20
1.50 & 1.20
1.50
1.20
1.20
1.20
1.60
1.60
1.20
1.60
1.20
1.20
1.20
1.60
1.20
1.20
1.20
LL
uH
MAX
0.50
0.50 & 0.80
0.55 & 0.80
0.80
0.60 & 0.50
0.50 & 0.40
0.40
0.60
1.00
0.80
1.00 & 0.80
0.80
0.80
1.30
0.80
0.80
0.80
0.80
0.80
0.80
0.80
CC
pF
MAX
30
35
40 & 35
30
35 & 40
35 & 40
45
40 & 30
30
50
66 & 55
60 & 50
50 & 60
55 & 40
50
50
50
60
50
50
60 & 50
Pri DCR
Ohms
MAX
0.70
0.80
0.70
0.70 & 1.00
0.70
0.70
0.80
0.70
0.70
1.00
1.70
1.00
1.00
1.10
1.00
1.20
1.00
1.20
1.20
0.90
1.20
Sec DCR
Ohms
MAX
1.00
1.80
1.20 & 0.90
1.10 & 0.70
1.10
0.90 & 1.10
1.00
1.10 & 0.90
0.45
1.70
2.00 & 1.70
1.00 & 2.00
1.10 & 1.70
1.10 & 0.70
1.00
1.40
1.00 & 1.80
1.40 & 1.20
1.40
1.20
2.10
Schematic
Primary
Pins
12-10, 4-6
12-10, 4-6
12-10, 4-6
1-3, 9-7
12-10, 4-6
12-10, 4-6
12-10, 9-7
12-10, 4-6
1-3, 4-6
12-10,4-6
12-10,4-6
12-10,4-6
12-10,4-6
1-3,4-6
1-3,4-6
1-3,4-6
1-3,4-6
12-10,4-6
1-3,4-6
12-10,9-7
10-12,4-6
Standard Temperature
28Z651
1:2CT&1:2CT
28Z652
1:2CT&1:1.36
28Z653
1:2CT&1:1.14CT
28Z654
1CT:2CT&1:1
28Z665
1:1.15CT&1:2CT
28Z666
1:1:1.266&1:2CT
28Z668
1:1/1.26&1:1/1.26
28Z669
1CT:2CT&1:1.08CT
28Z674
2CT:1CT & 1:1
Extend Temperature Range
28Z626
1CT:2CT&1CT:2CT
28Z627
1CT:2CT&1:1.36CT
28Z628
1:1.15CT&1CT:2CT
28Z629
1:1/1.26&1:2CT
28Z630
1:2CT&2:1
28Z631
1CT:1CT&1CT:1CT
28Z632
1CT:1.15CT&1CT:1.15CT
28Z633
1CT:1CT&1CT:2CT
28Z634
1CT:1.15CT&1CT:1CT
28Z635
1CT:1.36CT&1CT:1.36CT
28Z636
1CT:1.41CT&1CT:1.41CT
28Z637
1CT:2.3CT&1CT:2CT
A
B
A
D
A
A
E
F
D
C
F
G
A
H
C
C
C
C
C
C
C
T-602.2
05/01
17
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www.VitecCorp.com
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