2791C Datasheet, PDF (1/2 Pages) Bel Fuse Inc. – MODEM MAGNETICS V.90 Modem Transformer

MODEM MAGNETICS
V.90 Modem Transformer
TM00405
• Provides isolation and balance while minimizing
signal distortion and insertion loss in high-speed
modem applications
• Designed to match a 600Ω line to a 374Ω load
with no direct current in the windings
• Approved by UL and CSA
• Minimum interwinding breakdown voltage of 1000 Vrms
• Qualified per Bellcore TR-TSY-000357-1
ELECTRICAL SPECIFICATIONS at 25° C
Part
Number
Turns Ratio
± 2%
Insertion
Loss
dB
@ 1 kHz
Return Loss
dB
Frequency
Response
dB
300 Hz - 3500 Hz 200 Hz - 4 kHz
DCR
Ω
max
Pri
Sec
2791C
1:1
< 2.0
> 25
< 0.1
118
125
Harmonic
Distortion
dB
-10 dBm,
600 Hz
Longitudinal
Balance
dB
300 Hz - 3500 Hz
< -84
> 60
SCHEMATIC
2791C
1
6
3
Primary
4
Secondary
TYPICAL SPICE TRANMISSION MODEL
107
2.8 mH
1
20 pF
60 k
3
114
18 H
6
20 pF
4
©2000 Bel Fuse Inc. Specifications subject to change without notice. 05.00
Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] • www.belfuse.com
T4-11