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ISU - U Interface Transformer

Features

compatibility with common transceiver IC´s ensures maximum loop length
complies with ANSI standard T1.601 when used with recommended chip
2,000 Vrms minimum isolation
industry standard footprints are available in four DIL and SMD package options
excellent quality at competitive price due to high volume production
manufactured in ISO-9001 approved facility
operating temperature: -40° to +85°C

ISU - U Interface Transformer

ISU Series - U Interface Transformers
Packaging Style

ISDN IC - U Interface Transformer Cross Reference Guide

IC Manufacturer	IC Part Number	Turns Ratio (Line:Chip)	Coding	Talema Part Number
IC Manufacturer	IC Part Number	Turns Ratio (Line:Chip)	Coding	RM6 - TH	RM6 - SMD	RM8 - TH	PT23/11
Legerity (AMD)	AM20902 AM2091	1.32:1 1.60:1	4B3T 2B1Q	ISU-100A ISU-110A	ISU-100B & ISU-100G ISU-110B & ISU-110G	ISU-100C ISU-110C	- -
Lucent	T7262	2.50:1	2B1Q	-	-	ISU-120C	-
Alcatel	MCT2071 MCT20276	1.32:1 2.00:1	4B3T 2B1Q	ISU-100A ISU-170A	ISU-100B & ISU-100G ISU-170B & ISU-170G	ISU-100C ISU-170C	- -
Motorola	MC145472 MC145572	2.00:1 1.25:1	2B1Q 2B1Q	- -	- -	ISU-130C ISU-140C	ISU-130D ISU-140E
National	TP3410	1.50:1	2B1Q	-	-	ISU-150C	ISU-150D
Infineon	PEB2091 PEB8090 PEB8091/8191 PEB80912 PEB24902/24911 PEB21910/21911 PEB2090/20901	1.60:1 1.32:1 1.60:1 2.00:1 1.60:1 1.60:1 1.32:1	2B1Q 4B3T 2B1Q 2B1Q 2B1Q 2B1Q 4B3T	ISU-110A ISU-100H ISU-110A ISU-170X ISU-110A ISU-110A ISU-100A	ISU-110B & ISU-110G - ISU-110B & ISU-110G - ISU-110B & ISU-110G ISU-110B & ISU-110G ISU-100B & ISU-100G	ISU-110C - ISU-110C - ISU-110C ISU-110C ISU-100C	- - - - - - -
Thomson	ST5411	1.50:1	2B1Q	-	-	ISU-160C	U-160D

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Electrical Specifications @ 25°C

Turns Ratio: Bold = IC side windings

ISU Series - U Interface Transformers

Part Number	Turns Ratio	L_P (mH)	I_DC (mA)	R_CUP (Ohms)	R_CUS (Ohms)	V_P (Vrms)	Package	Schematic
ISU-100A ISU-100B ISU-100C ISU-100G	1.32:1 1.32:1 1.32:1 1.32:1	7.1 - 8.7 7.1 - 8.7 7.1 - 8.7 7.1 - 8.7	60 60 60 60	5.4 5.4 2.3 5.4	4.1 4.1 1.8 4.1	2,000 2,000 2,000 2,000	RM6 - THT RM6-SMD-"B" RM8 - THT RM6-SMD-"G"	1 1 2 2
ISU-110A ISU-110B ISU-110C ISU-110G	1.65:1 1.65:1 1.65:1 1.65:1	13.0 -16.0 13.0 -16.0 13.0 -16.0 13.0 -16.0	60 60 60 60	5.8 5.8 3.8 5.8	5.9 5.9 2.5 5.9	2,000 2,000 2,000 2,000	RM6 - THT RM6-SMD-"B" RM8 - THT RM6-SMD-"G"	1 1 2 1
ISU-120C	2.50:1	14.5 - 18.0	60	5.0	2.2	2,000	RM8 - THT	2
ISU-130D ISU-130C	2.00:1 2.00:1	25.5 - 28.5 25.5 - 28.5	60 60	11.6 7.9	6.4 3.3	2,000 2,000	PT23 - THT RM8 - THT	4 3
ISU-140E ISU-140C ISU-140G	1.25:1 1.25:1 1.25:1	26.5 - 29.7 26.5 - 29.7 26.5 - 29.7	80 80 60	12.0 7.0 11.2	7.0 5.5 9.1	2,000 2,000 2,000	PT23 - THT RM8 - THT RM6-SMD-"G"	4 3 1
ISU-150D ISU-150C ISU-150G	1.50:1 1.50:1 1.50:1	25.5 - 28.5 25.5 - 28.5 25.5 - 28.5	60 60 60	20.0 10.5 11.5	3.0 7.0 7.6	2,000 2,000 2,000	PT23 - THT RM8 - THT RM6-SMD-"G"	5 3 1
ISU-160D ISU-160C	1.50:1 1.50:1	14.2 - 16.0 14.2 - 16.0	60 60	16.0 5.0	2.5 3.4	2,000 2,000	PT23 - THT RM8 - THT	5 2
ISU-170A ISU-170C ISU-170G	2.00:1 2.00:1 2.00:1	13.0 -16.0 13.0 -16.0 13.0 -16.0	60 60 60	5.8 3.8 5.8	5.9 2.5 5.9	2,000 2,000 2,000	RM6 - THT RM8 - THT RM6-SMD-"G"	3 2 3
ISU-180G	1.6:1	5.5 - 6.5	60	4.0	2.5	2,000	RM6-SMD-"G"	1

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Dimensions & Schematic - Pins

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