Token Ring Isolation Transformers ELECTRONICS INC. EPA1550-X & EPA1550-X-LF • Designed for IBM and Token Ring for 16 MHz Applications • Hipot : 500 Vrms (in compliance with LAN’s Safety Requirements) • Available in Single and Dual Low Profile Thru-Hole Packages • Add “-LF” after part number for Lead Free • Storage Temperature : -40°C to +125°C • Operating Temperature : 0°C to +70°C • IEEE 802.5 Compatible Electrical Parameters @ 25° C PCA Part Number OCL (µH Ref.) @ 100 KHz, 100 mV Interwinding Capacitance (pF Max.) Leakage Inductance (µH Max.) Insertion Loss (dB Max.) @ 10 MHz Return Loss (dB Min.) @ 5 MHz CMR (dB Min.) @ 1.0 MHz EPA1550-1(-LF) [Single] 750 25 0.20 0.5 20 -60 1.0 1.0 EPA1550-2(-LF) [Dual] EPA1550-3(-LF) [Single] 750 250 25 15 0.20 0.15 0.5 0.5 20 20 -60 -60 1.0 0.55 1.0 0.85 EPA1550-4(-LF) [Dual] 250 15 0.15 0.5 20 -60 0.55 0.85 EPA1550-5(-LF) [Dual] 400 Min. 30 0.03 0.5 20 -60 0.4 0.8 DCR (Ω Max.) Pri. Sec. • Hipot : 500 Vrms Between Pri. and Sec. Windings & also from Coil to Coil in Dual Package [EPA1550-5 is Wdg to Wdg] • • Turns Ratio for EPA1550-1 & 2 : 1:1:1:1 ± 5% •• Turns Ratio for EPA1550-3 & 4 : 1:1:2:2 ± 5% • Turns Ratio for EPA1550-5 : 2:9:22 ± 5% • .500 1.00 Max. Max. (25.40) (12.70) 16 9 .385 PCA .500 Max. EPA1550-2(-LF) Dual 16 Pin Package Marking : Max. D.C. Single 8 Pin Package 1 8 (9.78) PCA (12.70) EPA1550-1(LF) .015 D.C. .120 ± .020 .250 Max. (.381) (.305 ± .508) .015 (6.35) .120 ± .020 .250 Max. (.381) (.305 ± .508) (6.35) .300 .100 #24 TC (7.62) (2.54) .300 .100 #24 TC (7.62) (2.54) 1.00 Max. (25.40) Dual 20 Pin Schematic Dual 16 Pin Schematic 20 19 1 Single 8 Pin Schematic 20 1 16 1 5 2 15 2 6 11 .400 PCA Max. EPA1550-5(-LF) 1 D.C. 10 (10.16) Pin 1 I.D. .018 .250 Max. (.457) (6.35) 2 18 3 14 3 7 3 17 4 13 4 8 4 5 6 7 16 15 5 12 6 11 Notes : 7 10 1. Lead Finish 8 9 14 13 8 9 10 12 11 Dual 20 Pin Package .100 (2.54) .300 (7.62) #24 TC EPA1550-X EPA1550-X-LF SnPb Hot Tin Dip (Sn) 2. Peak Temperature Rating 260°C 3. Moisture Sensitive Levels MSL = 1 260°C MSL = 1 (Unlimited, ≤30°C/60%RH) (Unlimited, ≤30°C/60%RH) 1.318 grams (-1) 1.318 grams (-1) (Tubes for -1 & -3) 46 pieces/tube 46 pieces/tube (Tubes for -2, -4 & -5) 24 pieces/tube 24 pieces/tube 4. Weight 5. Packaging Information .120 ± .020 (.305 ± .508) Unless Otherwise Specified Dimensions are in Inches /mm ± .010 /.25 PCA ELECTRONICS, INC. 16799 SCHOENBORN ST. NORTH HILLS, CA 91343 Product performance is limited to specified parameters. Data is subject to change without prior notice. CSA1550-X & -LF Rev. 1 8/20/07 RR TEL: (818) 892-0761 FAX: (818) 894-5791 http://www.pca.com