2746B Datasheet, PDF (1/2 Pages) Bel Fuse Inc. – MODEM MAGNETICS Audio/Voice Frequency Transformer

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
• UL approved, file number E105648
• Operates over the audio/voice frequency range
• Minimum interwinding breakdown voltage of 1500 Vrms
• Meets IEC 695, 2-2 flammability requirements
ELECTRICAL SPECIFICATIONS at 25° C
Part Number
Turns Ratio
± 2%
Pri : Sec
Primary
Inductance*
H min
Insertion
Loss
dB max
@ 1 kHz
Return
Loss
dB typ
@ 300 Hz
DCR
Ω
max
Frequency Shaping
Relative to 1 kHz
dB
Harmonic
Distortion
%
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 [phone] • Fax [phone] • www.belfuse.com