ra6870

Document 1170 -1
Common Mode Choke RA6870
• Recommended for use in the RX and TX sections of the
Microchip MOST150 coaxial PHY application diagrams.
• Included in the OS82150, MOST150 Coaxial Transceiver, and
OS81118, MOST150 INIC evaluation boards
Core material Ferrite
Environmental RoHS compliant
Terminations Matte tin over nickel over silver-palladium-glass frit.
Ambient temperature –40°C to +125°C with Irms current
Storage temperature Component: –40°C to +125°C.
Tape and reel packaging: –40°C to +80°C
Resistance to soldering heat Max three 40 second reflows at
+260°C, parts cooled to room temperature between cycles
Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C /
85% relative humidity)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332
Packaging 2000/7″ reel; 7500/13″ reel; Plastic tape: 8 mm wide,
0.23 mm thick, 4 mm pocket spacing, 1.14 mm pocket depth
PCB washing Tested to MIL-STD-202 Method 215 plus an additional
aqueous wash. See Doc787_PCB_Washing.pdf.
Part
number1
RA6870-AL_
Inductance2 DCR
min (nH)
700
max3 Isolation Irms4
(Ohms)
(Vrms)
(mA)
0.69
250
0.080 ±0.004
2,03 ±0,10
300
2
4
3
0.065 max
1,65
1.When ordering, please specify packaging code:
RA6870-ALC
Packaging:C=7″ machine-ready reel. EIA-481 embossed plastic
tape (2000 parts per full reel).
B=Less than full reel. In tape, but not machine ready.
To have a leader and trailer added ($25 charge),
use code letter C instead.
D
=13″ machine-ready reel. EIA-481 embossed plastic
tape (7500 parts per full reel).
2. Inductance measured at 100 MHz using an Agilent/HP 4286A
impedance analyzer and a Coilcraft SMD-A fixture.
3.DCR is specified per winding.
4.Current per winding that causes a 20°C rise from 25°C ambient.
5.Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
1
0.020 0.040
0,51 1,02
1
0.004
0,10
0.030
0,76
0.018
0,46
0.036
0,91
2
1
3
4
0.014
0,36
2
0.050 ±0.004
1,27 ±0,10
4
3
Recommended
Land Pattern
Dimensions are in
0.020
0,51
inches
mm
Document 1170-1 Revised 09/08/15
Document 1170-2
Common Mode Filter — RA6870-AL
Typical Common Mode Attenuation (Ref: 50 Ohms)
0
Attenuation (dB)
5
10
15
20
25
30
0.1
1
10
100
1000
10,000
100
1000
10,000
Frequency (MHz)
Typical Impedance vs Frequency
Impedance (Ohms)
10000
1000
100
10
0.1
1
10
Frequency (MHz)
Document 1170-2 Revised 09/08/15