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HIGH FREQUENCY MAGNETICS
T1/E1 Dual Hybrid Transformer Module
* Optimized for T1/E1 signal splitting with either balanced pair 100 or 120 lines, or unbalanced 75 cable Two balanced, equal-ratio 3dB hybrid transformers in one surface mount package Excellent signal isolation at split ports B and C * * * Meets ITU-T G.703 return loss from -40 to +85 C UL 1950 approved: file number E150991 * Reliability testing: Shock, vibration, temperature cycling, temperature - humidity - bias Interwinding breakdown voltage: 1500 Vrms min * * * * Operating temperature range -40 to +85C Meets IEC 695, 2-2 flammability requirements PWB Process Capability: standard printed wiring board assembly techniques, total-immersion cleaning
TM01125
*
ELECTRICAL SPECIFICATIONS at 25 C
Impedance Ratio Part Number Port A : Port B + Port C ASIG : BSIG + CSIG 100 : 100 + 100 or 120 : 120 + 120 or 75 : 75 + 75 Insertion Loss dB typ 500 kHz to 5 MHz ASIG to BSIG ASIG to CSIG Transhybrid Loss dB typ 500 kHz to 5 MHz BSIG to CSIG Return Loss dB typ 100 kHz to 5 MHz ASIG
S553-6500-F4
3.2
55
30
PIN DIAGRAM AND EXTERNAL CONNECTIONS
1 1 ASIG+ ASIG1 2 3
S553-6500-F4
ASIG+ ASIGBSIG+ 32 BSIG- 31 COM 1 30 COM 2 29 DSIG+ DSIGCSIG+ 28 CSIG- 27 COM 3 26 COM 4 25 ASIG+ BSIG+ 24 BSIG- 23 COM 5 22 COM 6 21 CSIG+ 20 CSIG- 19 COM 7 18 COM 8 17 2 2 CSIG+ CSIG2 2 BSIG+ BSIG1 1 CSIG+ CSIG1 1 BSIG+ BSIG-
Notes 1) External resistors R1 and R2 terminate the unused fourth port (DSIG) for each hybrid. External connections at COM 1 through COM 8 terminals complete required internal interconnections. Resistors R1 and R2 should be set equal to the line impedance.
2 2 R1 6 7 8 4 5
2)
3)
ASIG+ ASIG-
9
10 ASIG11 12 13 DSIG+
R2 14 DSIG15 16
(c)2001 Bel Fuse Inc. Specifications subject to change without notice. 12.01
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com page 1
HIGH FREQUENCY MAGNETICS
TM01125
T1/E1 Dual Hybrid Transformer Module
MECHANICAL
S553-6500-F4
1.050 [26.67] max
0.050 [1.27]
0.425 0.300 [10.80] [7.62] max 0.050 [1.27] pitch
0.465 [11.81]
0.070 [1.78]
0.020 0.002 [0.51 0.05]
0.025 [0.64] R0.005 [R0.13] typ R0.005 [R0.13] typ
0.290 [7.37] max
0.004
0-5
0.750 [19.05]
0.010 [0.25] min
2X 0.035 [0.89] 2X 0.060 [1.52]
Dimensions are in inches [millimeters]. Standard dimension tolerance is 0.005 [0.13] unless otherwise noted.
Tape and Reel Packaging 44 mm wide by 16 mm pitch; 13 inch OD, 4 inch ID 400 modules per reel, maximum Meets ANSI/EIA 481-2 Carrier Tape Standards - JEDEC SO Package
(c)2001 Bel Fuse Inc. Specifications subject to change without notice. 12.01
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com page 2
HIGH FREQUENCY MAGNETICS
T1/E1 Dual Hybrid Transformer Module
APPLICATION NOTES The S553-6500-F4 hybrid transformer module contains two identical balanced hybrid transformers. Each balanced hybrid is arranged in a symmetrical 4-port configuration, which provides low loss for preferred paths and high loss in non-preferred (transhybrid) paths: Bi-directional Preferred Paths Port A to Port B Port A to Port C Port D to Port B Port D to Port C Normally, each hybrid is used as a 3-port device and the fourth port is terminated in a resistor whose value is equal to the line impedance (100 for T1, 75 or 120 for E1). While each hybrid is designed to handle balanced lines, it will also handle a 75 unbalanced line as well. In this case, R1 should be set to 75 and should be left floating as it is for the balanced lines also. In operation, a signal at Port A is divided equally at Ports B and C with half of its original power appearing at Port B and half at Port C. Signal isolation between splitting Ports B and C is very high at the fundamental T1 and E1 pulse repetition frequencies. In fact, the signal isolation is typically greater than 55 dB from 500 kHz to 5 MHz. This allows equipment connected at one of the splitting ports to be shorted or opened with virtually no effect on the signal at the other port. In the preferred paths, the insertion loss is very low - typically less than 0.2 dB. This value is added to the theoretical half-power or 3 dB value that results from the equal signal split to obtain a total insertion loss of 3.2 dB from input to either output. A typical signal-splitting application is shown below. A single input signal is applied at the ASIG inputs of Port A and is split equally at the BSIG and CSIG outputs of Ports B and C. TYPICAL APPLICATION
Half of S553-6500-F4
TM01125
Bi-directional Non-preferred Paths Port A to Port D Port B to Port C
100 Line Input
1 Port A 2 3 4 5
ASIG+ ASIG-
BSIG+ 32 Port B BSIG- 31 COM 1 30 COM 2 29 LIU 1
DSIG+ DSIG-
CSIG+ 28 Port C LIU 2 CSIG- 27 COM 3 26 COM 4 25
R1 100
Port D 6 7 8
(c)2001 Bel Fuse Inc. Specifications subject to change without notice. 12.01
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com page 3
HIGH FREQUENCY MAGNETICS
TM01125
T1/E1 Dual Hybrid Transformer Module
THIS PAGE INTENTIONALLY LEFT BLANK
(c)2001 Bel Fuse Inc. Specifications subject to change without notice. 12.01
CORPORATE
Bel Fuse Inc. 206 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 G7, Preston Lancashire, PR1 8UD, U.K. Tel 44-1772-556601 Fax 44-1772-888366 www.belfuse.com
page 4

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