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EPU - U Interface Transformer

We offer a cost effective range of U Interface transformers for 2B1Q and 4B3T applications for equipment transmission between customer premises and exchanges. The transformers meet all requirements of recognized U Interface IC´s and ANSI standard T1.601 with a highly reliable pulse shape and return loss performance.

Features

compatibility with common transceiver lC´s ensures maximum loop length
complies with ANSI standard T1.601 when used with recommended chip
1,500V minimum isolation
all materials approved to UL94V-0
excellent quality at competitive price due to high volume production
manufactured in ISO-9001 approved facility
operating temperature: -40°C to +85°C

Electrical Specifications @ 25°C

Turns Ratio: Bold = IC Side Windings

EPU Series - U Interface Transformers

Part Number	L_O ±8% mH	Turns Ratio ±2% Line : IC	I_DC mA	DCR Line Ohms Nom.	DCR IC Ohms Nom.	L_L Line Side µH Max.	C_C pF Nom.	V_P (Vrms)	Schematic
EPU-100A EPU-100B	16.0 16.0	1.65:1 1.65:1	60 60	8.4 8.4	5.2 5.2	80 80	45 45	1,500 1,500	A B
EPU-110B	14.5	1.25:1	60	8.2	6.7	70	50	1,500	B
EPU-120A EPU-120B	7.9 7.9	1.32:1 1.32:1	60 60	5.3 5.3	4.1 4.1	60 60	45 45	1,500 1,500	A B
EPU-200A	6.15	1.6:1	60	3.6	2.3	40	40	1,500	A
EPU-300B EPU-300D	28.0 28.0	1.25:1 1.25:1	60 60	19.5 19.5	16.0 16.0	150 150	60 60	1,500 1,500	B D
EPU-400B EPU-400C	16.0 16.0	2:1 2:1	60 60	8.4 8.4	4.3 4.3	80 80	50 50	1,500 1,500	B C

IC - U Interface Cross Reference

Dimensions & Schematic
Dimensions & Schematic - Pins

IC Manufacturer	IC Part Nubmer	Talema Part Number
Infineon	PEB 8091 / 8191	EPU-100B
	PEB 24902 / 24911	EPU-100B
	PSB 21910 / 21911	EPU-100B
	PEB 2491 (2B1Q)	EPU-110B
	PEB 20901	EPU-120A
	PEB 2090 (4B3T)	EPU-120B
	PEB 2091 (2B1Q)	EPU-100A
Motorola	MC145572 (2B1Q)	EPU-300B
Motorola	MC145572 (2B1Q)	EPU-300D
Mietec	MTC20278 IL TQ (2B1Q)	EPU-400B
	MTC20279 IL TQ (4B3T)	EPU-200A
	MTC20276	EPU-400C

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EPU - U Interface Transformer

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EPU Series - U Interface Transformers