B981.A (02/12)1
pulseelectronics.com
VDSL Transformers
For use with Broadcom’s BCM6315 transceiver chip
B4020, B4021 and BX4055: for use with Texas
Instrument’s TNET800 chipset
Excellent return loss and balance
Surface mount or through hole package
B4020
Mechanical
Schematic
Weight ......................1.2grams
Tube ............................60/tube
Dimensions:
Unless otherwise specified,
all tolerances are ±
Inches
mm
.010
0,25
USA 858 674 8100 Germany 49 7032 7806 0 Singapore 65 6287 8998 Shanghai 86 21 62787060 China 86 755 33966678 Taiwan 886 3 4356768
For Use with Broadcom© and Texas
Instruments Chipset
Electrical Specifications @ 25°C - Operating Temperature -40°C to +85°C
Part
Number
Turns
Ratio
Inductance
(μH MIN)
Return Loss
( dBMIN)
Insertion Loss*
( dBMAX)
Line Impedance
( Ω)
Longitudinal
Balance
( dB TYP)
CM Rejection
( dB TYP)
Isolation
Voltage
(Vrms)
300 kHz to 1 MHz: 18 200 kHz: 60 10 MHz: 35
B4020 (THT) 1CT:1CT 190 1 kHz to 11 MHz: 20 100 11 MHz: 42 30 MHz: 33 3000
11 kHz to 30 MHz: 16 100 MHz: 30 100 MHz: 25
200 kHz: 60 10 MHz: 35
100 11 MHz: 50 30 MHz: 33 1500
100 MHz: 40 100 MHz: 30
300 kHz to 1 MHz: 15 200 kHz: 60 10 MHz: 35
BX4056 (SMT) 1:1.16 190 1 kHz to 20 MHz: 20 100 11 MHz: 50 30 MHz: 33 1500
20 kHz to 30 MHz: 17 100MHz: 40 100 MHz: 30
Notes: Surge Voltage Capability: Metallic: 800 Vpeak 10/560 sec. Long: 2400 Vpeak 10/700 sec. B4020 is designed to meet the requirements for supplementary isolation according
to IEC950. 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.
1:1
1CT:1CT
190
200 kHz to 1 kHz: 0.8
200 kHz to 400 kHz: 0.75
200 kHz to 400 kHz: 0.75
1 kHz to 30 kHz: 0.7
400 kHz to 30 MHz: 0.60
400 kHz to 30 MHz: 0.50
300 kHz to 20 MHz: 20
20 kHz to 30 MHz: 18
BX4055 (SMT)
B4021 (SMT)
Notes: Leads are 24 AWG solderable.
Unused pins not provided.
.250
MAX
6,35
.130
3,30
.200
5,08
.100
2,54
5
3
1
6
4
2
B4020
Date Code
.350
MAX
8,89
.500
MAX
12,70
.400
10,16
