defining a degree of excellence T1/CEPT/ISDN-PRI TRANSFORMER S553-6500-26 TM0004 SCHEMATIC Bel offers a dual, T1, surface mount transformer packaged to provide both transmit and receive transformers. This design is easily customized for other leading transceiver chips by adjusting the turns ratio. 12 Secondary 11 10 9 3 4 Secondary 8 7 * Dielectric Strength 1500 VAC. 2 Primary 1 0.004 * Extended Temperature Range is -40oC to 85oC. MECHANICALS 0.675(17.15) Max 12 belDate 0.60 (15.24) Max 0.500 (12.7) 7 0.470 0.400 (10.16) (11.94) Max Max Code S553-6500-26 0.055 (1.40) 0.10(2.54) 0.340 (8.64) Max 0.03(0.76) Part Number S553-6500-26 Part Number S553-6500-26 0.400 (10.2) 6 ELECTRICALS SUGGESTED PAD LAYOUT 0o -5o 1 6 5 Primary 0.640 (16.3) 0.10(2.5) Typ 0.015(0.38)Min 0.02(0.51) Max 0.05(1.3) Typ @ 25o C Turns Ratio +/- 2% Pins (10-12):(1-3) All dimensions are in inches(mm). Dimension Tolerance is +/-0.01(0.25) unless otherwise specified. Pins (4-6):(7-9) 1CT:1.CT 1CT:2CT Primary Inductance OCL (mH) Min Leakage Inductance LL (µH) Max Pins (1-3) and Pins (4-6) Pins (1-2) and Pins (4-6) 1.2 0.8 Interwinding Capacitance (pF) Max Pins (1,2,3) to Pins (10,11,12) and Pins (4,5,6) to Pins (7,8,9) 50 DCR (ohms) Max Dielectric Strength (VAC) Pins Pins Pins Pins (1-3) (4-6) (7-9) (10-12) 1.0 1.0 1.8 1.0 1500 Dielectric Strength is measured Pins (1,2,3) to Pins (10,11,12) and Pins (4,5,6) to Pins (7,8,9). Primary Inductance, Leakage Inductance, and Interwinding Capacitance are measured at 100KHz, 0.02VAC. Corporate Office Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302-4496 Tel: 201-432-0463 Fax: 201-432-9542 E-Mail: [email protected] Internet: http://www.belfuse.com T103 Far East Office Bel Fuse Ltd. 8F/8 Luk Hop Street San Po Kong Kowloon, Hong Kong Tel: 852-2328-5515 Fax: 852-2352-3706 European Office Bel Fuse Europe Ltd. Preston Technology Management Centre Marsh Lane, Preston PR1 8UD Lancashire, U.K. Tel: 44-1772-556601 Fax: 44-1772-888366