Integrity Technology Corporation

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Telephone Modem Coupling Transformers:

Low Cost Top Quality Designed to meet FCC Part 68.31(a) standards for data & voice access Public Switched Telephone Networks.
Lead-Free soldering Process. RoHS compliant products.
Designed for ITU / CCITT V.90, 56Kbps, V.34 33.6Kbps & 28.8Kbps, V.32terbo, 19.2Kbps, V.32 14.4Kbps industry standards modems.
Telephone line isolation, impedance matching & line balance for voice band telephones; and DC bias current up to 90mA.
Top Quality Highly Permeable Super thin Nickel Alloy Cores, Thermal Molded Phenolic UL 94V.0 Bobbins. Hard Copper Molded pins. Top Quality UEW2 Magnet Copper Wires.
Impregnated with Varnished. Insulation with 631S Polyester tapes.
UL Dielectric Strength of 1500 VAC min. between windings and core. T19Z is tested to 3750 Vrms for International requirements.
UL Insulation Resistance of 2 Mega Ohms at 500VDC between windings and core.

Analog Telephone Modem Coupling Transformer Selection Guide: (in Part Number Listings)

Part Number	Modem Applications	Special Features
T14H	V.92 56Kbps, Data/FAX/Voice	Small circuit board footprint, compact, full function
T14N	14400bps, DTMF, FAX/Voice	Low cost dry circuit telephone coupling line matching
T16N	28800bps, Data/FAX/Voice	Economical for Data, FAX, and voice modem
T24Z	V.92, above 56Kbps, Data	High current, high performance, full industry size
T16Z	14400bps, Voice, DTMF, FAX	Wet circuit, 55mA current for phone line coupling
T19Z	14400bps, Voice/FAX/Data	Wet circuit, 90mA bias current, 3750Vrms International

Modem Transformer Application Notes:
* Compact V.92 T14H High Performance Modem Transformer
* Telephone Line Impedance Matching Transformers for Modems

Modem Transformers Electrical Characteristic Specifications:

Part Number	Turn Ratio	Impedance Ohms	Inductance Primary	Resistance Ohms, DC	Insertion Loss @ 1KHz	Return Loss at 300 & 1KHz	Primary DC Bias current
T14H	1 : 1	600 : 390	4 H	95 : 120	2.5 dB	20 & 25 dB	0 mA, Dry
T14N	1 : 1	600 : 600	350 mH	80 : 75	1.6 dB	21 & 35 dB	0 mA, Dry
T16N	1 : 1	600 : 600	360 mH	60 : 60	1.3 dB	28 & 38 dB	0 mA, Dry
T24Z	1 : 1	600 : 374	12 H	140 : 150	2.0 dB	20 & 25 dB	0 mA, Dry
T16Z	1 : 1	600 : 600	420 mH	82 : 82	2.2 dB	21 & 32 dB	55mA, Wet
T19Z	1 : 1	600 : 600	400 mH	75 : 105	1.8 dB	15 & 35 dB	90 mA, Wet

Transformer Dimension in inches

Part Number	W" x L" x H" in inches
T14H	0.44 x 0.57 x 0.50
T14N	0.57 x 0.55 x 0.49
T16N	0.63 x 0.55 x 0.59
T24Z	0.89 x 0.49 x 0.97
T16Z	0.63 x 0.55 x 0.59
T19Z	0.75 x 1.18 x 0.51

Modem Transformer Photos are: T14H and T14N, T16N and T16Z, T19Z, T24Z and modem transformers group.