TFBS4650

Document Number 84672

Rev. 1.2, 28-May-08

Vishay Semiconductors

www.vishay.com

8

For technical questions within your region, please contact one of the following:

irdasupportAM@vishay.com, irdasupportAP@vishay.com, irdasupportEU@vishay.com

Recommended Solder Profiles

Solder Profile for Sn/Pb soldering

Lead (Pb)-Free, Recommended Solder Profile

The TFBS4650 is a lead (Pb)-free transceiver and

qualified for lead (Pb)-free processing. For lead

(Pb)-free solder paste like Sn(3.0-4.0)Ag(0.5-0.9)Cu,

there are two standard reflow profiles: Ramp-Soak-

Spike (RSS) and Ramp-To-Spike (RTS). The Ramp-

Soak-Spike profile was developed primarily for reflow

ovens heated by infrared radiation. With widespread

use of forced convection reflow ovens the Ramp-To-

Spike profile is used increasingly. Shown below in

figure 3 is VISHAY's recommended profiles for use

with the TFBS4650 transceivers. For more details

please refer to Application note: SMD Assembly

Instruction.

Wave Soldering

For TFDUxxxx and TFBSxxxx transceiver devices

wave soldering is not recommended.

Manual Soldering

Manual soldering is the standard method for lab use.

However, for a production process it cannot be

recommended because the risk of damage is highly

dependent on the experience of the operator.

Nevertheless, we added a chapter to the above

mentioned

application

note,

describing

manual

soldering and desoldering.

Storage

The storage and drying processes for all VISHAY

transceivers

(TFDUxxxx

and

TFBSxxx)

are

equivalent to MSL4.

The data for the drying procedure is given on labels

on the packing and also in the application note

"Taping, Labeling, Storage and Packing"

(http://www.vishay.com/docs/82601/82601.pdf).

Figure 2. Recommended Solder Profile for Sn/Pb Soldering

0

20

40

60

80

100

120

140

160

180

200

220

240

260

0

50

100

150

200

250

300

350

Time/s

2...4 °C/s

2...4 °C/s

10 s max. at 230 °C

120 s...180 s

160 °C max.

240 °C max.

90 s max.

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Figure 3. Solder Profile, RSS Recommendation

0

20

40

60

80

100

120

140

160

180

200

220

240

260

280

0

50

100

150

200

250

300

350

Time/s

20 s

2 °C...4 °C/s

2 °C...4 °C/s

90 s...120 s

T

≥ 217 °C for 50 s max

Tpeak = 260 °C max.

50 s max.

T

≥ 255 °C for 20 s max

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