T1218T PULSE ELECTRONICS CORPORATION, T1218T Datasheet - Page 2

• Manufacturer Part Number: T1218T
• Manufacturer: PULSE ELECTRONICS CORPORATION

Specifications of T1218T

• Operating Temp Range: -40C to 85C
• Mounting: Surface Mount
• Pin Count: 12
• Interwinding Capacitance Max: 35pF
• Isolation Voltage (max): 1500VrmsV
• Lead Style: Gull Wing
• Operating Temperature Max Deg. C: 85C
• Operating Temperature Min Deg. C: -40C
• Primary Leakage Inductance (max): 0.6uH
• Product Depth (mm): 15.24mm
• Product Height (mm): 8.64mm
• Product Length (mm): 17.15mm
• Return Loss (min): 9/12dB
• Turns Ratio: 1CT:1CT/1CT:1.36CT
• Lead Free Status / RoHS Status: Not Compliant

For More Information:
Pulse Worldwide
Headquarters
12220 World Trade Dr.
San Diego, CA 92128
U.S.A.
www.pulseeng.com
TEL: [phone]
FAX: [phone]
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.
© Copyright, 2006. Pulse Engineering, Inc. All rights reserved.
www.pulseeng.com
T1/E1/CEPT/ISDN-PRI
INTERFACE MODULES
Dual Surface Mount Transformer Modules,
1500Vrms, Extended Temperature Range
Notes From Tables
1. Extended Temperature Range Models — For extended
2. Turns ratio is specified primary: secondary (CT = Center Tap).
3. Standard packaging for the surface mount package is
Application Notes
1.
2.
3.
4.
5.
temperature range transformers (-40°C to +85°C operating
temperature range), OCL (Open Circuit Inductance) is specified
at both -40°C and +25°C. At -40°C, OCL is 600 µH minimum.
All other parameters are specified at +25°C only. Standard
temperature range is 0°C to +70°C.
anti-static tubes. Optional Tape & Reel packaging can be
ordered by adding a “T” suffix to the part number, (i.e. T1220T).
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 require-
ments 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 characteris-
tics 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.
Pulse
Europe
Einsteinstrasse 1
D-71083 Herrenberg
Germany
Tel: [phone]
Fax: [phone]
Pulse China
Headquarters
No. 1
Industrial District
Changan, Dongguan
China
Tel: [phone]
Fax: [phone]
6.
7.
8.
9.
10. Transformer Selection Guide — Please contact Pulse Application
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 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.
Engineering or see our website for the latest Pulse Transformer
Selection Guide.
Pulse North China
Room 1503
XinYin Building
No. 888 YiShan Rd.
Shanghai 200233
China
Tel: [phone]
Fax: [phone]
Metallic Voltage:
Longitudinal Voltage: 2,400V peak, 10/700µsec
XMIT
RCV
50-100kHz
12dB
9 dB
800V peak, 10/560µsec
Pulse South Asia
150 Kampong Ampat
#07-01/02
KA Centre
Singapore 368324
Tel: [phone]
Fax: [phone]
100kHz-2MHz
15dB
18dB
2-3MHz
Pulse North Asia
No. 26
Kao Ching Rd.
Yang Mei Chen
Taoyuan Hsien
Taiwan, R. O. C.
Tel: [phone]
Fax: [phone]
11dB
14dB
T660.B (6/06)