MODEM MAGNETICS
PCMCIA V.34 Modem Transformers
TM00407
•
Designed to match a 600Ω line to a 301Ω load
while providing isolation and balance in PCMCIA
Type II V.34 modem applications
•
•
Each transformer, while being identical electrically, has a
distinctive terminal configuration to accommodate
different PWB offsets in the PC card
•
•
Qualified per Bellcore TR-TSY-000357-1
Approved by UL and CSA
Minimum interwinding breakdown voltage of 1000 Vrms
ELECTRICAL SPECIFICATIONS at 25° C
Insertion
Loss
dB
Frequency
Response
dB
DCR
Ω
max
Harmonic
Distortion
dB
Longitudinal
Balance
dB
Return Loss
dB
Part
Number
Turns Ratio
± 2%
-10 dBm,
600 Hz
@ 1 kHz
300 Hz - 3500 Hz
200 Hz - 5 kHz
Pri
Sec
300 Hz - 3500 Hz
2796A
2796A2
2796A3
2796A4
2796A5
1 : 1
< 2.7
> 30
< 0.1
165
165
> 80
> 60
SCHEMATIC
6
1
2796A
2796A2
2796A3
2796A4
2796A5
3
4
Primary
Secondary
TYPICAL SPICETRANSMISSION MODEL
0.5mH
19k
154
153
3.5H
20pF
20pF
©2000 Bel Fuse Inc. Specifications subject to change without notice. 05.00
Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
T4-15
