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
MODEM MAGNETICS
TM99AH
Audio/Voice Frequency Transformer
MECHANICAL
2746B
0.730 [18.54] max
0.570 [14.48] max
0.110 [2.79] 0.230 [0.58] Sq typ (Phosphor bronze, solder-coated)
0.630 [16.00] max
1 0.400 [10.16] 8 0.113 [2.87]
2
3
4
6
5
0.133 [3.38]
0.150 [3.81] Centers
Note: Unless otherwise specified, dimensions are nominal and in inches [millimeters].
©1999 Bel Fuse Inc. Specifications subject to change without notice.
CORPORATE
Bel Fuse Inc. 198 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
FAR EAST
Bel Fuse Ltd. 8F / 8 Luk Hop Street San Po Kong Kowloon, Hong Kong Tel 852-2328-5515 Fax 852-2352-3706 www.belfuse.com
EUROPE
Bel Fuse Europe Ltd. Preston Technology Management Centre Marsh Lane, Suite F23, Preston Lancashire, PR1 8UD, U.K. Tel 44-1772-556601 Fax 44-1772-888366 www.belfuse.com
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