Part Turns Ratio DCR Return Loss Insertion Loss* Transhybrid Longitudinal Isolation
Number Trans. Rec. (MAX) (dB MIN) (dB MAX) Loss (dB MIN) Balance Voltage
(dB MIN) (Vrms)
B4008 (THT) 2:1 1:1 0.5 Ω
138 kHz to 1 MHz: 13.5 138 kHz to 20 MHz: 0.5 138 kHz to 1 MHz: 30 138 kHz to 300 kHz: 60 2000
B4025 (SMT) 1 MHz to 20 MHz: 20 1 MHz to 20 MHz: 25 300 kHz to 1 MHz: 50
1 MHz to 20 MHz: 30
NOTE: Common Mode Chokes to reduce common mode ingress from AM Broadcast or HAM Radios are available. See data sheet B912 for parts B4001 and B4003.
Surge Voltage Capability: Metallic: 800 Vpeak 10/560 µsec. Long.: 2400 Vpeak 10/700 µsec.
Surge over the Extended Temperature Range: Insertion Loss can increase to 1 dB. Return Loss can drop to 7 dB from 138 kHz to 300 kHz, and 12 dB from 300 kHz to 1 MHz.
VDSL TRANSFORMERS
For Use with Broadcom® BCM 6010/6020
Electrical Specifications @ 25°C — Operating Temperature 0°C to 70°C
Supports speeds up to 25.92 Mbps
Provides two-wire to four-wire conversion
Surface mount or through hole package
Schematics
Weight...............2.8 grams
Tube......................20/tube
1.000 MAX
25,40
.405 MAX
10,29
.100
2,54
.200
5,08
.300
7,62
.300 MAX
7,62
.120
3,05
B4008
Date Code
Country of Origin
DIA 13X .020
0,51
0° – 8°
16 x .040
1,02
.395
10,03
SUGGESTED PAD LAYOUT
.700
17,78
.100
2,54
.040
1,02
.540
13,72
.100
2,54
.235 MAX
5,97
.004/0,10
16 SURFACES .012
0,30
1.005 MAX
25,53
.100
2,54
.700
17,78
.505 MAX
12,83
Date Code Country of Origin
B4025
B4008 B4025
Mechanicals
B925.A (11/03)
For More Information :
Printed on recycled paper. ©2003, Pulse Engineering, Inc.
Dimensions: Inches
mm
Unless otherwise specified, all tolerances are ± .010
0,25
119
5
2
417
614
10 12
7
913
1:1
2:1
Pin 13: Internal connection only
116
5
2
4
15
12 11
89
13
710
1:1
2:1
Pin 10: Internal connection only
B4008 B4025
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DISTRIBUTOR
Performance warranty of products offered on this data sheet is limited to the parameters specified. Data is subject to change without notice. Other brand and product
names mentioned herein may be products and/or registered trademarks of their respective owners.
