AT91R40008 ATMEL Corporation, AT91R40008 Datasheet - Page 17

• Manufacturer Part Number: AT91R40008
• Description: AT91 ARM Thumb Microcontroller
• Manufacturer: ATMEL Corporation

Soldering Profile
1732DS–ATARM–03/04
Table 9 gives the recommended soldering profile from J-STD-20.
Table 9. Soldering Profile
Small packages may be subject to higher temperatures if they are reflowed in boards
with larger components. In this case, small packages may have to withstand tempera-
tures of up to 235 C, not 220 C (IR reflow).
Recommended package reflow conditions depend on package thickness and volume.
See Table 10.
Table 10. Recommended Package Reflow Conditions
When certain small thin packages are used on boards without larger packages, these
small packages may be classified at 220 C instead of 235 C.
Notes:
A maximum of three reflow passes is allowed per component.
Average Ramp-up Rate (183 C to Peak)
Preheat Temperature 125 C ±25 C
Temperature Maintained Above 183 C
Time within 5 C of Actual Peak Temperature
Peak Temperature Range
Ramp-down Rate
Time 25 C to Peak Temperature
Parameter
Convection
VPR
IR/Convection
1. The packages are qualified by Atmel by using IR reflow conditions, not convection or
2. By default, the package level 1 is qualified at 220 C (unless 235 C is stipulated).
3. The body temperature is the most important parameter but other profile parameters
VPR.
such as total exposure time to hot temperature or heating rate may also influence
component reliability.
AT91R40008 - Summary
Temperature
235 +5/-0 C
235 +5/-0 C
235 +5/-0 C
Convection or
IR/Convection
3 C/sec. max.
120 sec. max
60 sec. to 150 sec.
10 sec. to 20 sec.
220 +5/-0 C or
235 +5/-0 C
6 C/sec.
6 min. max
(1, 2, 3)
VPR
10 C/sec.
60 sec.
215 to 219 C or
235 +5/-0 C
10 C/sec.
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