ISDN S-INTERFACE
TRANSFORMERS
Surface Mount, Dual, 2000Vrms
Meets pulse waveform template of CCITT I.430 when
recommended transformer and chip pair are used
Excellent longitudinal balance
2KVrms isolation voltage
Available in tape and reel, tray or tube packaging
Recognized by UL
Electrical Specifications @ 25°C — Operating Temperature 0°C to 70°C
Part
Number
PE-65792
PE-65793
PE-65795
PE-65798
PE-65799
Ratio
A
(±2%)
A
1:1
1:1
1:2
1:2.5
1:2
B
1:2
1:1
1:2
1:2.5
1:2
OCL Pri
B
(mH MIN)
A&B
22
22
22
22
22
L
L
Sec
(µH MAX)
A
B
5
15
5
15
8-40
11
5
15
8-40
11
C
W
/
W
(pF MAX)
A&B
100
100
100
100
100
CD Pri
(pF MAX)
A
B
42
80
42
80
110
180
42
80
110
180
DCR Pri
(Ω ±25%)
A
B
2.4
2.3
2.4
2.5
2.5
2.4
2.4
2.5
2.5
2.4
DCR Sec
(Ω ±25%)
A
B
2.4
4.0
2.4
4.3
5.8
4.4
2.4
4.3
5.8
4.4
Δ
I
DC
C
Package/
(mA MAX)
Schematic
1
1
1
1
1
SC-1
SC-1
SC-1
SC-1
SC-1
NOTE:
For low profile version of products listed above, refer to data sheet
T613.
(See Pages 4 and 5 for Table Notes)
Mechanical
SC-1
.120 TYP
3,05
16
9
.720 MAX
.530 MAX
18,29
13,46
.600
15,24
8
.760 .520
19,30 13,21
SEC
Schematic
.050 TYP
1,27
16 15 14 13
12 11 10
9
PE-6579X
Date Code
Country of Origin
16X .030
0,76
.950 MAX
24,13
.100 TYP
2,54
.700
17,78
PRI
1
2 3 4
COIL A
5
6 7 8
COIL B
SUGGESTED PAD LAYOUT
.390 MAX
9,91
.100
2,54 .010/.020
0,25/0,51
.004/0,10
16 SURFACES
.040/.050
1,02/1,27
.122
3,10
Dimensions:
Inches
mm
Unless otherwise specified all tolerances are ± .010
0,25
See page 4 for packaging information.
USA 858 674 8100
•
UK 44 1483 401 700
•
France 33 3 84 35 04 04
•
Singapore 65 6287 8998
•
Shanghai
86 21 32181071
•
China 86 769 5538070
•
Taiwan 886 2 26980228
www.pulseeng.com
1
T604.D (1/06)
ISDN S-INTERFACE
TRANSFORMERS
Through Hole, Single, 2000Vrms
Meets the pulse waveform template
of CCITT I.430 when recommended
transformer and chip pair are used
Excellent longitudinal balance
2KVrms or higher voltage isolation
Recognized by UL
Electrical Specifications @ 25°C — Operating Temperature 0°C to 70°C
2KV I
SOLATION
, T
HROUGH
H
OLE
, S
INGLE
T
RANSFORMERS
Part
Number
PE-64993
PE-64994
PE-64995
PE-64996
PE-64998
PE-64999
Ratio
A
(±2%)
1CT:1CT
1CT:1.8CS
1CT:2CT
1CT:2.5CS
1CS:2.5CS
1CT:2CT
OCL Pri
(mH MIN)
22
22
22
22
22
22
L
L
Sec
(µH MAX)
5
15
15
30
15-40
11
C
W
/
W
(pF MAX)
100
100
100
100
100
100
CD Pri
(pF MAX)
42
160
80
150
110
180
DCR Pri
(Ω ±25%)
2.4
2.5
2.5
2.5
2.5
2.4
DCR Sec
(Ω ±25%)
2.4
4.2
4.3
5.8
5.8
4.4
Isolation
(Vrms MIN)
2000
2000
2000
2000
2000
2000
Δ
I
DC
C
(mA MAX)
1
1
1
1
1
1
Package/
Schematic
IS-1
IS-2
IS-1
IS-2
IS-3
IS-1
(See Pages 4 and 5 for Table Notes)
Mechanicals
.558
MAX
14,20
1
6
PE-6499X
5
DATE CODE
Schematics
.400
10,20
.400
MAX
10,20
PRI : SEC
1
6
5
4
IS-1
2
3
.558
MAX
14,20
.400
10,20
2
C
L
3
C
L
4
.120 ± .020
3,10 0,30
.558
MAX
14,20
.400
MAX
10,20
7
6
DATE CODE
See page 4 for packaging information.
LEADS ARE 22 AWG SOLDERABLE
.400
10,20
PRI : SEC
1
2
7
6
5
4
1
IS-2
2
PE-6499X
3
5
4
.558
MAX
14,20
.400 .200
10,20 5,10
C
L
3
C
L
.120 ± .020
3,10 0,30
.558
MAX
14,20
1
2
3
4
8
7
6
5
.120 ± .020
3,10 0,30
Dimensions:
Inches
mm
Unless otherwise specified, all tolerances are ± .010
0,25
See page 4 for packaging information.
LEADS ARE 22 AWG SOLDERABLE
.400
MAX
10,20
.400
10,20
PRI : SEC
1
8
7
6
5
2
3
4
IS-3
PE-6499X
DATE CODE
.558
MAX
14,20
.400 .200
10,20 5,10
C
L
C
L
See page 4 for packaging information.
LEADS ARE 22 AWG SOLDERABLE
USA 858 674 8100
•
UK 44 1483 401 700
•
France 33 3 84 35 04 04
•
Singapore 65 6287 8998
•
Shanghai
86 21 32181071
•
China 86 769 5538070
•
Taiwan 886 2 26980228
www.pulseeng.com
2
T604.D (1/06)
ISDN S-INTERFACE
TRANSFORMERS
Dual and Single Through Hole
Electrical Specifications @ 25°C — Operating Temperature 0°C to 70°C
Part
Number
PE-65492
PE-65493
PE-65495
PE-65498
PE-65499
COIL A
Ratio
A
1:1
1:1
1:2
1:2.5
1:2
Equivalent
Single
PE-64993
PE-64993
PE-64995
PE-64998
PE-64999
Primary
Pins
1-4
1-4
1-4
1-4
1-4
Secondary
Pins
16-13
16-13
16-13
16-13
16-13
Ratio
A
1:2
1:1
1:2
1:2.5
1:2
COIL B
Equivalent
Single
PE-64995
PE-64993
PE-64995
PE-64998
PE-64999
Primary
Pins
5-8
5-8
5-8
5-8
5-8
Package/
Secondary
Schematic
Pins
12-9
12-9
12-9
12-9
12-9
ID-1
ID-1
ID-1
ID-1
ID-1
NOTE:
Refer to the equivalent single part number for electrical specifications.
(See Pages 4 and 5 for Table Notes)
Mechanical
ID-1
.920
MAX
23,37
16
9
.560
MAX
14,22
8
.130 ± .020
3,30 0,30
Dimensions:
Inches
mm
Unless otherwise specified all tolerances are ± .010
0,25
Schematic
COIL A
COIL B
.700
17,78
.400
MAX
10,20
16 15 14 13 12 1110 9
SEC
.400
10,20
PE-6549X
DATE CODE
C
L
1
PRI
.100
TYP
2,54
C
L
LEADS ARE 22 AWG SOLDERABLE
1
2 3
4
5
6 7
8
See page 4 for packaging information.
Electrical Specifications @ 25°C — Operating Temperature 0°C to 70°C
3
K
V R
EINFORCED
I
NSULATION
, T
HROUGH
H
OLE
, S
INGLE
T
RANSFORMERS
Pulse
Part Number
PE-68992
PE-68993
PE-68995
PE-68998
PE-68999
Ratio
A
± 2%
(Pri:Sec)
1CS:2CT
1CS:1
1CS:2
1CS:2.5
1CS:2
OCL Pri
(mH MIN)
22
22
22
22
22
L
L
Sec
(µH MAX)
15
5
15
8-40
11
C
W
/
W
(pF MAX)
60
40
60
60
50
C
D
(pF MAX)
80
40
80
110
110
REIN
INS FORC
ULA ED
TIO
N!
DCR
Unbalanced
Package/
(Ω ± 25%)
I
DC
C
Schematic
Primary
Secondary (mA MAX)
3.0
2.8
3.0
3.0
2.8
5.5
2.7
5.5
7.0
5.5
5
5
5
5
5
WD-1/B
WD-1/A
WD-1/A
WD-1/A
WD-1/A
(See Pages 4 and 5 for Table Notes)
Mechanical
WD-1
1
2
4
6
0.750 MAX
19,05
PE-6899X
DATE CODE
Schematic
.591
15,00
12
11
9
7
1
2
4
6
4
PRI : SEC
4
1
9
6
7
PRI : SEC
1
12
2
9
6
7
See page 4 for packaging information.
.130
3,30
12
11
9
7
.500
12,70
MAX
LEADS ARE 22 AWG SOLDERABLE
UNUSED PINS NOT PROVIDED
A
.098
2,50
0.750 MAX
19,05
.492
12,50
.197
5,00
12
B
Dimensions:
Inches
mm
Unless otherwise specified, all tolerances are ± .010
0,25
USA 858 674 8100
•
UK 44 1483 401 700
•
France 33 3 84 35 04 04
•
Singapore 65 6287 8998
•
Shanghai
86 21 32181071
•
China 86 769 5538070
•
Taiwan 886 2 26980228
www.pulseeng.com
3
T604.D (1/06)
ISDN S-INTERFACE
TRANSFORMERS
Transformer Selection and Packaging
IC
Manufacturer
IC
Part Number
Dual
Surface Mount
Trans & Rec
AMD
AT&T/Lucent
Mietec
Mitel
Motorola
National
D
SGS Thomson
Siemens
Yamaha
Am 79C30A/79C32A
T7250/7256/7259
T7903
MTC-2072
MT8930
MC145474/145475
MC145574
TP3420/3421
ST5420, ST5421
PEB 2080/2081/2085
PSB 2186
PEB 2084/2086
7405B
PE-65799
PE-65798
PE-65795
PE-65795
PE-65795
PE-65793
PE-65798
PE-65795
PE-65795
PE-65795
PE-65795
Single
Through Hole, 2 KVrms
Transmit
PE-64999
PE-64998
PE-64995
PE-64995
PE-64995
PE-64993
PE-64998
PE-64995
PE-64995
PE-64995
PE-64995
Receive
PE-64999
PE-64998
PE-64995
PE-64995
PE-64995
PE-64993
PE-64998
PE-64995
PE-64995
PE-64995
PE-64995
Dual
Through Hole
Trans & Rec
PE-65499
PE-65498
PE-65495
PE-65495
PE-65495
PE-65493
PE-65498
PE-65495
PE-65495
PE-65495
PE-65495
Single
Through Hole, 3 KVrms
Transmit
PE-68999
PE-68998
PE-68995
PE-68995
PE-68995
PE-68993
PE-68998
PE-68995
PE-68995
PE-68995
PE-68995
Receive
PE-68999
PE-68998
PE-68995
PE-68995
PE-68995
PE-68993
PE-68998
PE-68992
PE-68995
PE-68995
PE-68995
NOTES
A. In this catalog, turns ratio is expressed as
“primary:secondary”. The term “CT” designates a center
tapped winding. The term “CS” designates a split center tap
winding. A center tapped winding can be created by connect-
ing two ends of a split center winding together on the printed
circuit board. In ISDN-S applications, the primary winding is
the line side transformer winding.
B. The minimum primary inductance and the maximum
distributed capacitance satisfy the transmitter output and
receiver input impedance requirements of CCITT I.430 for
both the TE and the NT. The maximum distributed capaci-
tance allows sufficient margin for the capacitance of the IC
and a protection diode network. It is consistent with the
overall maximum value specified and the permitted length of
the basic access TE cord.
C. The maximum specified unbalanced DC current capability is
based on 20 mH minimum primary OCL.
D. National recommends a 1:2 receive transformer, but used as
a 1:1 ratio by connecting only half the secondary winding.
See National’s application note.
E. PE-65950, PE-68613 and PE-65853 are recommended for
use with Siemens PEB 2080/2085 and help in meeting the
required longitudinal balance.
F. Standard packaging for all chokes and transformers listed in
this catalog is anti-static tubes. Optional anti-static tray
packaging can be ordered for the surface mount SC-1 and
LA-1 packages by adding an “R” suffix to the part number,
(ie: PE-65795R). Optional tape and reel packaging can be
ordered for all surface mount packages by adding a “T” suffix
to the part number, (ie: PE-65795T).
G. For PE-65854, OCL at -40°C is 27 µH minimum. For maxi-
mum performance use windings (1-8) and (2-7) as a pair and
windings (3-6) and (4-5) as a pair.
H. For transformers and choke modules, refer to data sheet
T632.
Packaging Information
Package
F
LA-1
PA-2
SC-1
SH-4
ID-1
IN-1
IS
VC-1
WD-1
Type
SMT
SMT
SMT
SMT
THT
THT
THT
THT
THT
Part Weight
2.0 grams
4.0 grams
7.0 grams
0.3 grams
7.0 grams
2.5 grams
4.0 grams
3.5 grams
9.0 grams
Parts/Tube
30
35
20
25
20
35
35
40
25
Parts/Tray
60
–
50
–
–
–
–
–
–
Parts/Reel
250
150
150
1500
–
–
–
–
–
Reel Diameter
13 inches
13 inches
13 inches
13 inches
–
–
–
–
–
Tape Width
24 mm
32 mm
44 mm
24 mm
–
–
–
–
–
Pitch
24 mm
24 mm
24 mm
12 mm
–
–
–
–
–
(See Pages 4 and 5 for Table Notes)
USA 858 674 8100
•
UK 44 1483 401 700
•
France 33 3 84 35 04 04
•
Singapore 65 6287 8998
•
Shanghai
86 21 32181071
•
China 86 769 5538070
•
Taiwan 886 2 26980228
www.pulseeng.com
4
T604.D (1/06)
ISDN S-INTERFACE
TRANSFORMERS
Application Notes
TE
Sec : Pri
S-INTERFACE
IC
XMIT
IC
RCV
Pri : Sec
NT
Sec : Pri
Low
Freq
Choke
High
Freq
Choke
High
Freq
Choke
Low
Freq
Choke
Pri : Sec
RCV
XMIT
Local
Power
DC
Supply
Figure 1. Typical ISDN S-Interface Application Circuit
1. General Information
– The S-interface is the standard-
ized four-wire digital telephone access point defined by
the CCITT I-series recommendations for the Integrated
Services Digital Network. This “basic rate access” accom-
modates two 64Kbps “B-channels” for information, one
16Kbps “D-channel” intended for signaling and control,
and 48 Kbps for framing and other purposes, giving a total
rate of 192Kbps. The CCITT physical layer recommends
that the user network interface be transformer coupled.
A typical application circuit is presented in
Figure 1.
The transformer provides isolation for the line card or the
terminal from the line. It is also a way to provide phantom
power feeding to the terminal over the S-loop. Each end
requires a transmit and a receive transformer. Chokes are
used in some applications to reduce common mode noise
(see note 5).
The transformers described in this data sheet are
matched to the transceivers offered by the major IC manu-
facturers listed. The use of a transformer-chip pair
assures that all requirements of CCITT I.430 are met with
respect to pulse waveform templates, impedance and
longitudinal balance. In addition, the transformers provide
the isolation voltages required by the regulatory agencies
and are capable of passing surge voltage tests.
2. Longitudinal Balance for Transformers
– The longitudi-
nal conversion loss specification in I.430 includes a test
setup that is intended for system evaluation, whether TE
or NT. Such a test is performed with DC current present.
The transformer plays an essential role in achieving the
required balance. However, all other elements in the
circuit should be also designed to provide the highest
possible symmetry. These elements include the protection
circuitry, series resistors, chip transmitter output and
receiver input, as well as the cables used and the TE cord
where applicable. A high level of transformer balance
compensates for some circuit AC-unbalance, and assures
compliance of the system with I.430 on longitudinal
conversion loss (LCL) and signal balance. This is accom-
plished by a well AC-balanced winding configuration
whereby the capacitive coupling between primary and
secondary windings is evenly distributed. Also, both
halves of the lineside winding are well balanced. The
transformers meet the following LCL specifications:
• 10kHz to 300kHz: 60dB minimum
• 300kHz to 1MHz: Minimum value decreasing
20dB/decade.
(continued on next page)
USA 858 674 8100
•
UK 44 1483 401 700
•
France 33 3 84 35 04 04
•
Singapore 65 6287 8998
•
Shanghai
86 21 32181071
•
China 86 769 5538070
•
Taiwan 886 2 26980228
www.pulseeng.com
5
T604.D (1/06)
Electronics Design Contest
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