ISDN MAGNETICS Single S Interface Transformer • Approved for use with Lucent Technologies chip sets for • S/T interface European ISDN applications • UL, TUV and VDE approved • TM99AA Meets requirements for pulse template and impedance template according to ITU-T (CCITT I.430) Minimum interwinding breakdown voltage of 3000 Vrms ELECTRICALS at 25° C Part Number 2776A Turns Ratio ± 3& 1 : 2.5 Primary Inductance* mH min 22.0 DCR Ω max Leakage Inductance µH max 5.0 Pri Sec 1.55 8.75 Interwinding Capacitance pF max Distributed Capacitance pF max 100 100 * Measured at 1 kHz, 0.1 Vac SCHEMATIC Compatible Transceiver ICs Part Number 2776A IC Mfr IC Part Number Lucent T7250C T7256 T7234 1 8 3 CT 2 6 4 Primary Secondary ©1999 Bel Fuse Inc. Specifications subject to change without notice. Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com ISDN MAGNETICS Single S Interface Transformer TM99AA MECHANICAL 1.150 [29.21] max 2776A 0.680 [17.27] max 5 4 6 3 7 2 8 1 Terminal 1 ID 0.540 [13.72] max 0.110± 0.010 [2.79± 0.25] 0.800 [20.32] 8 Terminals 0.023 [0.58] Square 0.150 [3.81] Note: Unless otherwise specified, dimensions are nominal and in inches [millimeters]. ©1999 Bel Fuse Inc. Specifications subject to change without notice. CORPORATE FAR EAST EUROPE Bel Fuse Inc. 198 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com Bel Fuse Ltd. 8F / 8 Luk Hop Street San Po Kong Kowloon, Hong Kong Tel 852-2328-5515 Fax 852-2352-3706 www.belfuse.com Bel Fuse Europe Ltd. Preston Technology Management Centre Marsh Lane, Suite F23, Preston Lancashire, PR1 8UD, U.K. Tel 44-1772-556601 Fax 44-1772-888366 www.belfuse.com