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FT232R Datasheet(PDF) 15 Page - Future Technology Devices International Ltd. |
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FT232R Datasheet(HTML) 15 Page - Future Technology Devices International Ltd. |
15 / 29 page FT232R USB UART I.C. Datasheet Version 1.04 © Future Technology Devices International Ltd. 2005 Page 15 5.5 Solder Reflow Profile Critical Zone: when T is in the range T to T Time, t (seconds) 25 P T = 25º C to T tp Tp TL t Preheat S tL Ramp Up L p Ramp Down T Max S T Min S Figure 10 - FT232R Solder Reflow Profile The recommended values for the solder reflow profile are detailed in Table 4. Values are shown for both a completely Pb free solder process (i.e. the FT232R is used with Pb free solder), and for a non-Pb free solder process (i.e. the FT232R is used with non-Pb free solder). Table 4 - Reflow Profile Parameter Values Profile Feature Pb Free Solder Process Non-Pb Free Solder Process Average Ramp Up Rate (T s to Tp) 3°C / second Max. 3°C / Second Max. Preheat - Temperature Min (T S Min.) - Temperature Max (T S Max.) - Time (t S Min to tS Max) 150°C 200°C 60 to 120 seconds 100°C 150°C 60 to 120 seconds Time Maintained Above Critical Temperature T L: - Temperature (T L) - Time (t L) 217°C 60 to 150 seconds 183°C 60 to 150 seconds Peak Temperature (T P) 260°C 240°C Time within 5°C of actual Peak Temperature (t P) 20 to 40 seconds 20 to 40 seconds Ramp Down Rate 6°C / second Max. 6°C / second Max. Time for T= 25°C to Peak Temperature, T p 8 minutes Max. 6 minutes Max. The FT232R is supplied in Pb free 28 LD SSOP and QFN-32 packages. The recommended solder reflow profile for both package options is shown in Figure 10. |
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