AT91R40807-33AU Atmel, AT91R40807-33AU Datasheet - Page 5

• Manufacturer Part Number: AT91R40807-33AU
• Description: IC ARM7 MCU 100TQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91R40807-33AU

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 33MHz
• Connectivity: EBI/EMI, UART/USART
• Peripherals: WDT
• Number Of I /o: 32
• Program Memory Type: ROMless
• Ram Size: 136K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

Junction
Temperature
1367C–01/02
The average chip-junction temperature T
1.
2.
Where:
•
•
•
•
•
From the first equation, the user can derive the estimated lifetime of the chip and thereby
decide if a cooling device is necessary or not. If a cooling device is to be fitted on the chip, the
second equation should be used to compute the resulting average chip-junction temperature
T
J
in °C.
θ
page 4.
θ
Table 5 on page 4.
θ
P
Consumption” on page 3.
T
T
T
JA
JC
HEAT SINK
A
J
J
D
= ambient temperature (°C).
= device power consumption (W) estimated from data provided in the section “Power
=
= package thermal resistance, Junction-to-ambient (°C/W), provided in Table 5 on
= package thermal resistance, Junction-to-case thermal resistance (°C/W), provided in
=
T
T
A
A
+
+
P (
= cooling device thermal resistance (°C/W), provided in the device datasheet.
(
P
D
D
×
×
θ (
θ
HEATSINK
JA
)
+
θ
JC
) )
J
in °C can be obtained from the following:
AT91R40807
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