T1/CEPT/ISDN-PRI TRANSFORMERS
Quad Port SMT Transformer Modules with
IC Side Protection
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 PM 4329 HDLIU
Low DCR
Patented “Interlock Base” construction for high reliability
Minimum Isolation voltage: 1500 Vrms
Electrical Specifications @ 25°C
Part
Number
Turns Ratio
(Pri:Sec ±2%)
OCL Line Side
(mH MIN)
C
W
/
W
(pF MAX)
30
L
L
(µH MAX)
.5
Package/
Schematic
QTERA
TX
RX
E
XTENDED
T
EMPERATURE
R
ANGE
M
ODEL
– O
PERATING
T
EMPERATURE
-40°C
TO
+85°C
TX9027
1:2
1:2
1.2
NOTE:
The crosstalk attenuation is typically 50 dB or better.
Mechanical
QTERA
1.125 MAX
28,58
.090
40X 2,29
.050 40X .030
0,76
1,27
19X .050 = .950
1,27
24,13
SUGGESTED PAD LAYOUT
Schematic
1
1:2
40
39
V
G
1:2
38
37
36
1:2
35
34
33
31
1:2
30
29
28
27
26
1:2
25
24
V
G
1:2
23
22
21
LINE SIDE
32
.640 MAX
16,26
40X .018
0,46
.480
12,19
2
3
4
5
6
7
8
CHIP SIDE
9
10
11
12
13
14
15
16
V
G
V
G
DATE CODE
COUNTRY OF ORIGIN
TX9027
.050
19X 1,27
.950
24,13
1:2
.485
12,32
0° 8°
.285 MAX
7,24
.045
40X 1,14
.004/0,10
40 Surfaces
.010
0,25
1:2
Weight
...............5.0 grams
Tape & Reel..........250/reel
Tube
......................15/tube
Dimensions:
Inches
mm
Unless otherwise specified, all tolerances are ± .010
0,25
17
18
19
20
US 858 674 8100
•
UK 44 1483 401 700
•
France 33 3 84 35 04 04
•
Singapore 65 6287 8998
•
Taiwan 886 2 2698 0228
•
Hong Kong 852 2788 6588
•
http://www.pulseeng.com
T691.A (8/04)
T1/CEPT/ISDN-PRI TRANSFORMER
Quad Port SMT Transformer Module with
IC Side Protection
Application Notes
1.
Flammability
— Materials used in the products are recognized
as UL94-VO approved. Products meet the requirements of
IEC 695-2-2 (Needle Flame Test).
Balance Characteristics
— The transformers meet the require-
ments for longitudinal balance of FCC part 68.
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.
HP-8751A
P1 P2
5.
2.
3.
Return Loss
— ITU-T G.703 and European national regulatory
documents 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
Surge Voltage Capability
– All transformers and chokes
meet surge voltage tests according to the most stringent
regulatory documents when system designs include the proper
voltage and current suppression devices.
Isolation Voltage
— 100% of transformers are tested during
production to the specified isolation voltage level.
General Information
— The
TX9027
is specifically designed for
use in 1.544 Mbps (T1), 2.048 Mbps (CEPT) and ISDN Primary
rate (PRI) interface applications. Use of the proper transformer
allows the interface circuit to comply with ITU-T G.703 and other
standards regarding pulse waveform, return loss, and balance.
7.
8.
50:100
BALUN
XFMR
100:50
BALUN
4.
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
100
XFMR
100:50
BALUN
For More Information :
UNITED STATES
(Worldwide)
12220 World Trade Drive
San Diego, CA 92128
U.S.A.
http://www.pulseeng.com
TEL: 858 674 8100
FAX: 858 674 8262
UNITED KINGDOM
(Northern Europe)
5 Huxley Road
Surrey Research Park
Guildford, Surrey GU2 5RE
United Kingdom
TEL: 44 1483 401700
FAX: 44 1483 401701
FRANCE
(Southern Europe)
Zone Industrielle
F-39270
Orgelet
France
TEL: 33 3 84 35 04 04
FAX: 33 3 84 25 46 41
SINGAPORE
(Southern Asia)
150 Kampong Ampat
#07-01/02
KA Centre
Singapore 368324
TEL: 65 6287 8998
FAX: 65 6280 0080
TAIWAN, R.O.C.
(Northern Asia)
3F-4, No. 81, Sec. 1
HsinTai Wu Road
Hsi-Chih, Taipei Hsien
Taiwan, R.O.C.
Tel: 886 2 2698 0228
FAX: 886 2 2698 0948
HONG KONG
(China/Hong Kong)
9/F, Phase 2, Tai Sang
Shatin Warehouse Centre
6 Wong Chuk Yeung Street
Fotan, Shatin, Hong Kong
TEL: 852 2788 6588
FAX: 852 2776 1055
DISTRIBUTOR
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 products and/or registered trademarks of their respective owners.
©2004, Pulse Engineering, Inc. All Rights Reserved.
T691.A (8/04)
嵌入式系统
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