TABLE 1: ELECTRICAL SPECIFICATIONS AT 25 ISDN U SMD ISOLATION TRANSFORMER. PARAMETER -------- PRIMARY INDUCTANCE (6-1): VOLTAGE = 0.250Vrms FREQUENCY = 10 KHZ 26.0 PRIMARY DC BIAS CURRENT THD < 70dB 0.0 C SPEC LIMITS TYP. MAX. MIN. TURNS RATIO: 7-12 : 6-1 (SEC :PRI) FIGURE 1: SCHEMATIC DIAGRAM O 1 : 1.25 29.0 UNITS -------- + 3% 33.0 mHy 1 12 PRI #1B PRIMARY LEAKAGE INDUCTANCE: VOLTAGE = 0.250Vrms FREQUENCY = 10 KHZ -------- -------- 65.0 70 mA PRIMARY (LINE SIDE) µHy 120 --------------- 6.51 6.77 7.50 7.50 Ohms Ohms LONGITUDINAL BALANCE OF PRI. 1KHz TO 4 KHz 4KHz TO 160 KHz -60 -58 -80 -70 --------------- dB dB Cw/w @ 10KHz (FULL PRI TO SEC) -------- 90.0 120.0 pF -------- -------- Vac HI-POT: 50/60Hz PRIMARY TO SECONDARY 1500 2 9 5 SEC #1A 7 6 FIGURE 2: RECOMENNDED PCB LAYOUT DIMENSIONS IN INCHES (mm) 7 24.8 (.976) 12x1.5 (.060) 1 12 6 7 12x0.8 (.031) PIN#1 I.D. ON BOBBIN 1 2 3 4 5 19.81 (.780) MAX 6 0.7 (.028) 5x2.5 (.100) CORE TAPE P PM-IU25 M YYWW 1 SECONDARY (CHIP SIDE) NOTE: 1) PRIMARY CENTER TAP IS FORMED BY CONNECTING PIN#2 TO PIN#5 FIGURE 2: PHYSICAL DIMENSIONS IN mm, (INCH) 8 SEC #1B PRI #1A DCR: EACH HALF OF PRIMARY (2-1 & 6-5) SECONDARY (7-12) 12 11 10 9 WHITE DOT DENOTES PIN #1 10.16 (.400) MAX 6 0.13 (.005) 2.5 (.098) 6 21.7 (.854) 7 0.4 (.016) 24.7 (.972) MAX REV. 04/08/96 05/20/96 06/03/02 P Premier M Magnetics Inc. UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN INCHES DIMENSIONAL TOLERANCES ARE: DECIMALS ANGLES .XX + .05 + 0 O 30' .XXX + .010 DO NOT SCALE DRAWING DESCRIPTION OF CHANGES ORIGINAL RELEASE CORRECTED INDUCTANCE RANGE. UPDATED DIMENSION AND 3 LAYER TAPE ISDN U TRANSFOMER CONTROL DRAWING PREMIER P/N: PM-IU25 REVISION: 06/03/02 DRAWN BY: TOM O'NEIL REF: PEB2091 SCALE: NONE SHEET: 1 OF 3 BY TO TO LL