T1/CEPT(E1)/ISDN-PRI TRANSFORMER
P/N: 4S1142M DATA SHEET
A. General Specifications
1. Eight transformers in a surface mount package supports four transmit and four receive channels .
2. Cross talk : -65dB or better
3. Models matched to leading quad and dual T1/E1/CEPTISDN-PRI transceivers .
4. IC grade transfer-molded package with stand 235℃IR reflow .
5. Operating temperature range: -40℃ to +85℃
B. Electrical Specifications @25℃:
1. Isolation HI-POT:1500 Vrms
2. Turns Ratio(± 2%) : TX=1:2.4, RX=1:1
3. TX/RX OCL. :1.5 mH Min /1.5 mH Min
4. TX/RX. Cw/w: 35 pF Max/35 pF Max
5. TX/RX L/L: 0.6 µH Max/0.6 µH Max
6. DCR : 0.8 Ω Max
7. Transmit : 1-2, 8-9, 11-12, 18-19, 40-39, 33-32, 30-29, 23-22
8. Receive : 3-4, 6-7, 13-14, 16-17, 38-37, 35-34, 28-27, 25-24
C. Schematic & Mechanical:
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Prepared :Qingli Wu
Approved: Xu Wenbing
REV.: A1
Date : 2001/01/28
Page : 1/1
Drawing no.: ISDN Transformer
