Recent advance affordable modems increase data transmission speed up to 56K Bits/sec in ITC / CCITT protocol standard V.90 (X2 or K56flex) and V.92. Integrity Technology Corporation offers T14H low profile coupling transformers for 56Kbps modem applications at volume cost of 79¢. This top quality high performance transformer using EI 14mm Nickel Alloy core are very compact size at 0.49" in height, 0.57 Width and 0.52" in depth. Transformers are made with top quality thermal molded Phenolic bobbins with hard copper pins. These matching transformers are designed for direct connect to 600 Ohms telephone line with zero DC bias, in "Dry" modem circuits. Integrity Technology also offers T24Z full size 56K and 64Kbps and dual line 124Kbps modem coupling transformer, pin compatible to industry standard, such as Midcom 671-8079.

Integrity Technology Corporation also manufactures low cost Voice band Telephone Matching Transformers. Please call Integrity Technology toll free voice mail and FAX at 1-877-872-0718 or email: IntegrityTechnology@usa.net for additional information.

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ADDITIONAL PRESS RELEASE BACKGROUND INFORMATION

Telephone Coupling transformers, often called telephone line matching transformers or audio matching transformers, are key components to connect to network telephone lines. Typical applications are Modem, FAX/Modem, FAX Machines, Telephone, answering machines, silent alarms, credit card verification machines ... etc. The recent generation of advance but low cost telephone coupling transformers, usually PCB through hole mounted, offer several major key criteria for designers to select from:

• Low profile of about half an inch above printed circuit board, usually between 0.35" to 0.55" for different EE core and bobbin sizes,
• Low cost at less than a dollar each, at moderate volume 10K pieces, for high performance of 28.8, 33.6 and 56K bps modem/FAX data transmission rates.
• Top quality Phenolic bobbins with molded hard copper pins for best PCB assembly, compare with Glass filled Nylon bobbins with soft wire leads,
• Small and compact footprint of between 0.15 to 0.20 square inches, would help conserve printed circuit board real estates,
• Dry input circuit of 0mA DC bias current at primary winding for Direct telephone line data interface, and for Wet circuit of 50mA to 110mA DC bias loop current.
• High performance core material, Z11 Nickel Parmalloy, offer high to moderate permeability, High Q, and high flux density. Other Grain oriented or non-oriented Silicon Steel lamination cores, offer low output signal distortion, and wide frequency spectrum. Typical EE core sizes are of 12, 14, 16 & 24mm.
• Input primary winding current rating for EIA-470 Ringing duty cycle requirement of minimum 125mA and continuous UL rating of 80mA.

Integrity Technology Corporation of Santa Clara, CA. offers complete series of compact low profile, high performance telephone coupling transformers at most competitive cost. The T14H and T24Z modem transformers, designed for CCITT V.90 standard 56Kbps modem application, functionally compatible with Midcom 671-8039, has 1 : 1 turn ratio, height of 0.49" and current rating of 50mA. The 10K volume price of T14H transformers is 79¢ each and T24Z is $1.25¢. Their T16Z transformers have height of 0.58", primary bias DC loop current of 50mA to 90mA and current rating of 80mA, is popular voice band coupling transformer for low cost telephone applications compatible to Tamura TTC series, at 10K volume cost of 50¢ each.