MODEM MAGNETICS
Audio/Voice Frequency Transformer
TM99AH
•
Used for intercircuit signal transfer, impedance
matching and V.32 modem applications
Qualified per Bellcore TR-TSY-000357-1
•
•
Operates over the audio/voice frequency range
Minimum interwinding breakdown voltage of 1500 Vrms
Meets IEC 695, 2-2 flammability requirements
•
•
•
UL approved, file number E105648
ELECTRICAL SPECIFICATIONS at 25° C
Insertion
Loss
dB max
Return
Loss
dB typ
DCR
Ω
max
Frequency Shaping
Relative to 1 kHz
dB
Harmonic
Distortion
%
Turns Ratio
± 2%
Part Number
Pri : Sec
Primary
Inductance*
H min
@ 1 kHz
@ 300 Hz
Pri
Sec
200 Hz
50 kHz
@ 300 Hz
2746B
1:1
1.5
1.0
> 20
68
68
0.5
0.5
< 0.5
* Measured at 200 Hz, 1 Vac
Longitudinal balance meets FCC 68.310(a) standards
Power level -47 dBm to +7 dBm
SCHEMATIC
2746B
1
8
4
Primary
5
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
BEL [ BEL FUSE INC. ]
