T1068 PULSE ELECTRONICS CORPORATION, T1068 Datasheet - Page 3

• Manufacturer Part Number: T1068
• Description: Audio & Signal Transformers T1/E1 XFMR; 4 PORT
• Manufacturer: PULSE ELECTRONICS CORPORATION

Specifications of T1068

• Frequency Range: 100 MHz
• Operating Temperature Range: 0 C to + 70 C
• Dimensions: 28.58 mm L x 16.26 mm W x 12.19 mm H
• Shielding: Unshielded
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

T1/E1/CEPT/ISDN-PRI TRANSFORMERS
Quad Port T1/E1 with 8 Transformers, 1500 Vrms
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www.pulseeng.com
USA 858 674 8100 • Germany 49 7032 7806 0 • Singapore 65 6287 8998 • Shanghai 86 21 62787060 • China 86 755 33966678 • Taiwan 886 3 4643715
P1 P2
HP-8751A
ET Product — All coils have an ET product of 10 V-µsec minimum.
Flammability — Materials used in the products are recognized as UL94-VO
approved. Products meet the IEC 695-2-2 requirements (Needle Flame Test).
Balance Characteristics — The transformers meet the requirements for
longitudinal balance of FCC part 68.
Common Mode Rejection Ratio — the CMRR for all transformers is better
than 50dB at 1MHz. A typical test circuit is shown below.
Crosstalk Attenuation — In the 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 attenuation is typically 65 dB or better. This result
was established with the test circuit shown below.
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
Surge Voltage Capability – All transformers and chokes meet surge voltage
tests according to the most stringent regulatory documents, when used with
the proper voltage and current suppression devices:
Isolation Voltage — 100% of transformers are tested during production to
Longitudinal Voltage:
Metallic Voltage:
P1 P2
HP-8751A
Transmit
Receive
50-100 kHz
BALUN
50:100
12 dB
9 dB
800 V peak, 10/560µsec
2,400 V peak, 10/700µsec
BALUN
50:100
100
100 kHz-2 MHz
15 dB
18 dB
XFMR
XFMR
BALUN
BALUN
100:50
100:50
2-3 MHz
100
11 dB
14 dB
Application Notes
3
9.
10. Common Mode Chokes — Additional high-frequency 4-line common mode
the specified isolation voltage level.
General Information — The transformers are specifically designed for use
in 1.544 Mbps (T1), 2.048 Mbps (CEPT) and ISDN Primary rate (PRI) interface
applications. They are matched to the majority of the line interface transceiver
ICs currently available. 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.
chokes may be used to provide an effective means of complying with national
and international regulations on EMI. The common mode chokes are designed
to be used in conjunction with Pulse’s T1/CEPT transformers as shown in the
typical application below. Crosstalk is typically -65 dB or better.
Typical Application
T622.J (11/09)