T1142 PULSE ELECTRONICS CORPORATION, T1142 Datasheet - Page 3

• Manufacturer Part Number: T1142
• Manufacturer: PULSE ELECTRONICS CORPORATION

Specifications of T1142

• Operating Temp Range: 0C to 70C
• Mounting: Surface Mount
• Pin Count: 40
• Interwinding Capacitance Max: 35pF
• Isolation Voltage (max): 1500VrmsV
• Lead Style: Gull Wing
• Ocl Inductance (max): 1(Min)mH
• Operating Temperature Max Deg. C: 70C
• Operating Temperature Min Deg. C: 0C
• Primary Leakage Inductance (max): 0.5uH
• Product Depth (mm): 16.26mm
• Product Height (mm): 5.84mm
• Product Length (mm): 28.58mm
• Return Loss (min): 9/12dB
• Turns Ratio: 1:2.4/1:1
• Lead Free Status / RoHS Status: Not Compliant

T1/E1/CEPT/ISDN-PRI TRANSFORMERS
Quad Port T1/E1 with 8 Transformers, 1500Vrms
1.
2.
3.
4.
5.
6.
7.
www.pulseeng.com
USA 858 674 8100
P1 P2
HP-8751A
ET Product — All coils have an ET product of 10V-µsec minimum.
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
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 65dB 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 cur-
rent suppression devices:
P1 P2
Metallic Voltage:
Longitudinal Voltage: 2,400V peak, 10/700µsec
HP-8751A
XMIT
RCV
• •
Germany 49 7032 7806
50-100kHz
BALUN
50:100
12dB
9dB
800V peak, 10/560µsec
BALUN
50:100
100
100kHz-2MHz
15dB
18dB
XFMR
XFMR
• •
Singapore 65 6287 8998
BALUN
BALUN
100:50
100:50
2-3MHz
100
11dB
14dB
• •
Shanghai
3
8.
9.
10. Common Mode Chokes — Additional high-frequency 4-line
XMIT 1
XMIT 2
XMIT 3
XMIT 4
RCV 1
RCV 2
RCV 3
RCV 4
IC
Isolation Voltage — 100% of transformers are tested during
production to the specified isolation voltage level.
General Information — The transformers are specifically
designed for use in 1.544Mbps (T1), 2.048Mbps (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.
common mode 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 -65dB or better.
86 21 54643211 / 2
8-Transformer
Package
Typical Application
• •
T8008
China 86 769 85538070
T8008
• •
Taiwan 886 3 4641811
8-Transformer
Package
T622.H (6/06)
XMIT 1
XMIT 2
XMIT 3
XMIT 4
RCV 1
RCV 2
RCV 3
RCV 4
IC