DC DC Converter Transformer (For Use with Maxim MAX253 & MAX845) Turns Ratio ( + 3% ) 1CT : 1CT PARAMETER MIN. MAX. UNITS Open Circuit Inductance 768 1152 mHy Leakage Inductance 0.7 µHy Rise Time 10 nSec DC Resistance 0.8 ohms Isolation (HI-POT) 2.0 KVRMS ET Product 11 VµS Interwinding Capacitance 35 Flammability: Materials used in the production of these units meet requirements of UL94-VO and IEC 695-2-2 needle flame test. Operating Temperature Range: -400C to +850C Parts shipped in anti-static tubes. 44 pieces per tube pF Tape & Reel Available TEST CONDITIONS: Oscillation Voltage = 100mV, Oscillation Frequency = 100.0 KHz Primary pins 1-4, short 2&3 SCHEMATIC DIAGRAM 1 8 2 7 PRI 8 7 6 5 .475 (12.07) SEC 3 6 4 5 MAX. 1 2 3 .430 (10.92) Dimensions in Inches (mm) 4 .410 (10.41) MAX. .260 (6.60) MAX. .300 (7.62) SUGGESTED PAD LAYOUT .640 (16.26) .010 (0.25) TYP. MAX. .100 (2.54) TYP. .050 (1.27) TYP. .100 (2.54) TYP. Rhombus Industries Inc. Transformers & Magnetic Products .030 (0.76) .025 (0.64) TYP. .100 (2.54) TYP. TYP. .600 (15.24) .580 (14.73) RHOMBUS INDUSTRIES INC. FSCM NO. 16714 RHOMBUS P/N: T-1484 CUST P/N: DATE: 02/28/02 NAME: SHEET: 1 OF 1 15801 Chemical Lane, Huntington Beach, CA 92649 Phone: (714) 898-0960 FAX: (714) 896-0971 www.rhombus-ind.com