AT91SAM7A1-AU Atmel, AT91SAM7A1-AU Datasheet - Page 380

• Manufacturer Part Number: AT91SAM7A1-AU
• Description: IC ARM7 MCU 32BIT ROMLESS144LQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM7A1-AU

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 40MHz
• Connectivity: CAN, EBI/EMI, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 49
• Program Memory Type: ROMless
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-LQFP
• For Use With: AT91SAM7A1-EK - BOARD EVAL FOR AT91SAM7A1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

29. Soldering Profile
380
AT91SAM7A1
Table 29-1
Table 29-1.
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 temperatures of up to
235 C, not 220 C (IR reflow).
Recommended package reflow conditions depend on package thickness and volume. See
Table 29-2
Table 29-2.
Notes:
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 VPR.
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 such as
4. A maximum of three reflow passes is allowed per component.
total exposure time to hot temperature or heating rate may also influence component
reliability.
below gives the recommended soldering profile from J-STD-20.
below.
Soldering Profile
Recommended Package Reflow Conditions
60 sec. to 150 sec.
10 sec. to 20 sec.
Convection or
IR/Convection
220 +5/-0 C or
3 C/sec. max
120 sec. max
235 +5/-0 C
6 min. max
6 C/sec.
(1)(2)(3)
215 to 219 C
220 + 5/-0 C
220 +5/-0 C
Measure
215 to 219 C or
6048B–ATARM–29-Jun-06
235 +5/-0 C
10 C/sec.
10 C/sec.
60 sec.
VPR