TDK Corporation announced what it asserts are the world’s smallest SMD pulse transformers for LAN applications. With dimensions of only 3.2 x 3.2 x 2.8 mm3, the new ALT3232M has 30 percent lower volume and footprint than previous products, according to the company. The inductance of the new transformer is 150 µH, its insertion loss is in the frequency range from 100 kHz to 100 MHz at 2.5 dB, and its parasitic winding capacitance is 25 pF at 100 kHz. By applying technology that has proved its worth in the production of SMD common mode filters, the company was able to devise an automated winding process suitable for mass production. This reduces characteristics variations that tend to occur with manual winding, and thereby offers enhanced reliability and quality.
TDK Corporation, www.global.tdk.com