Eight transformers in a low profile surface mount package
Includes IC Side Protection Circuit on each channel to
suppress low voltage transients
Compatible with PMC-Sierra’s Comet chip (PM4354)
Extended temperature range
Minimum Isolation voltage: 1500 Vrms
UL recognized
Electrical Specifications @ 25°C — Operating Temperature -40°C to +85°C
Part
Number
TX
TX9020
TX1299
1:2.42
1:2.42
Turns Ratio
(Pri:Sec ±2%)
RX
1:2.42
1:2.42
1.2
1.2
30 & 30
25 & 25
.60 & .60
.50 & .50
.70 & .40
.70 & .50
OCL Lineside
(mH MIN)
C
W
/
W
(pF MAX)
L
L
(µH MAX)
DCR
(Ω MAX)
NOTE: TX
= Transmit channel.
RX
= Receive channel
Mechanical
QTERA
1.125
MAX
28,58
.285
7,24
MAX
.485
12,32
Schematics
TX9020
1
2
3
4
5
.045
40X 1,14
TX1299
40
39
38
37
36
1
2
3
4
5
6
7
8
CHIP SIDE
LINE SIDE
9
10
11
12
13
14
15
16
17
18
19
20
1:2.42
1:2.42
1:2.42
1:2.42
1:2.42
1:2.42
1:2.42
1:2.42
40
39
38
37
36
35
34
33
LINE SIDE
32
31
30
29
28
27
26
25
24
23
22
21
1:2.42
.640
16,26
MAX
TX9020/TX1299
DATE CODE
COUNTRY OF ORIGIN
V
G
1:2.42
40X .018
0,46
.050
19X 1,27
.950
24,13
6
7
8
9
CHIP SIDE
10
11
12
13
14
15
16
17
18
19
V
G
V
G
V
G
1:2.42
35
34
33
32
31
1:2.42
.004/0,10
40 Surfaces
.010
0,25
1:2.42
30
29
28
27
26
.090
40X 2,29
.050 40X .030
0,76
1,27
19X .050 = .950
1,27
24,13
SUGGESTED PAD LAYOUT
.480
12,19
1:2.42
1:2.42
25
24
23
22
21
1:2.42
Weight
...............5.0 grams
Tape & Reel..........250/reel
Tube
......................15/tube
20
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
T677.B (9/05)
T1/CEPT/ISDN-PRI TRANSFORMER
Quad Port SMT Transformer Module with
IC Side Protection
Application Notes
1. ET Product
— All coils have an ET product of 10 V-µsec minimum.
2. Flammability
— Materials used in the products are recognized
as UL94-VO approved. Products meet the requirements of
IEC 695-2-2 (Needle Flame Test).
3. Balance Characteristics
— The transformers meet the require-
ments for longitudinal balance of FCC part 68.
4. Common Mode Rejection Ratio
— the CMRR for all transformers
is better than 50 dB at 1 MHz. A typical test circuit is shown below.
6. Return Loss
— ITU-T G.703 and European national regulatory doc-
uments specify minimum return loss levels. The transformers will
allow these limits to be complied within the situations where they are
applicable.
Frequency
Return Loss
XMIT
REC
50-100 KHz
9 dB
12 dB
100 KHz-2 MHz
15 dB
18 dB
2-3 MHz
11 dB
14 dB
HP-8751A
P1 P2
7. Surge Voltage Capability
– All transformers and chokes
meet surge voltage tests according to the most stringent
regulatory documents when system designs include the proper volt-
age and current suppression devices:
Metallic Voltage:
800 V peak, 10/560 µsec
Longitudinal Voltage: 2,400 V peak, 10/700 µsec
8. Isolation Voltage
— 100% of transformers are tested during
production to the specified isolation voltage level.
50:100
BALUN
XFMR
100:50
BALUN
5. Crosstalk Attenuation
— In the dual packages, which contain
transmit and receive transformers side by side, sufficient crosstalk
attenuation is achieved by the inherent characteristics of the toroid
cores as well as by their proper positioning. The crosstalk attenua-
tion is typically 50 dB or better from 100 KHz to 10 MHz. This result
was established with the test circuit shown below.
HP-8751A
P1 P2
50:100
BALUN
100
9. General Information
— These transformers are specifically
designed for use in 1.544 Mbps (T1), 2.048 Mbps (CEPT) and ISDN
Primary rate (PRI) interface applications. Use of the proper trans-
former allows the interface circuit to comply with ITU-T G.703 and
other standards regarding pulse waveform, return loss, and balance.
100
XFMR
100:50
BALUN
For More Information:
Pulse Worldwide
Headquarters
12220 World Trade Drive
San Diego, CA 92128
U.S.A.
www.pulseeng.com
TEL: 858 674 8100
FAX: 858 674 8262
Pulse
Northern Europe
3 Huxley Road
Surrey Research Park
Guildford, Surrey GU2 5RE
United Kingdom
TEL: 44 1483 401700
FAX: 44 1483 401701
Pulse
Southern Europe
Zone Industrielle
F-39270
Orgelet
France
TEL: 33 3 84 35 04 04
FAX: 33 3 84 25 46 41
Pulse
Pulse North China
China Headquarters
Room 1002
No. 1
Industrial District
Changan, Dongguan
China
TEL: 86 769 5538070
FAX: 86 769 5538870
No. 819
Nanjing West Rd
Shanghai
China
TEL: 86 21 32181071
FAX: 86 21 32181396
Pulse South Asia
150 Kampong Ampat
#07-01/02
KA Centre
Singapore 368324
TEL: 65 6287 8998
FAX: 65 6280 0080
Pulse North Asia
3F-4, No. 81, Sec. 1
Hsin Tai Wu Road
Hsi-Chih
Taipei Hsien
Taiwan
TEL: 886 2 26980228
FAX: 886 2 26980948
Performance warranty of products offered on this data sheet is limited to the parameters specified. Data is subject to change without notice. Other brand and product
names mentioned herein may be trademarks or registered trademarks of their respective owners.
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