20 PIN DIP ETHERNET 10/100 BASE DUAL PORT TRANSFORMER PN/:20PT1021A1 DATA SHEET A.GENERAL SPECIFICATIONS: 1.IEEE 802.3 ETHERNET COMPATIABLE, 100 BASE-TX 2.20 PIN DIP PACKAGE COMPATIBLE WITH POPULAR IC CHIPS. 3.DESIGN FOR MULTIPORT REPEATER AND ETHERNET SWITCHING HUB APPLICATION 4.CUSTOMER DESIGNS AVAILABLE FOR SPECIFIC APPLICATION B.ELECTRICAL SPECIFICATIONS@25°C 1.ISOLATION HI-POT: 1500 Vrms (PRI. /SEC.) 2.TURN RATIO (+/- 5%): TX=1CT: 1CT, RX=1:1 3.RISE TIME: 2.5 ns TYP 4.CW/W: 28 pF MAX 5.LEAKAGE INDUCTANCE: TX /RX 0.5uH Max 6.CMRR (0.1-100 MHz): -40dB 7.CROSSTALKS (0.1 TO 100MHz): -38dB Min 8.PRIMARY DC RESISTANCE, DCR (OHM Max): TX & RX :0.9 9.PRIMARY OCL (uH Min): TX & RX: 350 AT 100KHz/0.1Vrms, 8mA DC. 10.INSERTION LOSS (dB Max): -1.15dB AT 1MHz-100MHz 11.RETURN LOSS (dB Min): 1MHz-30MHz -18dB 30MHz-60MHz -14dB 60MHz-80MHz -12dB C.SCHEMATIC & DIMENSIONS & MARKING (UNIT mm): Date: April 15-2000 Pre by:WuQingli Rev.: X.0