MCIMX35_101 Datasheet, PDF (19/148 Pages) Freescale Semiconductor, Inc – i.MX35 Applications Processors for Industrial and Consumer Products

Table 11. Thermal Resistance Data
Rating
Condition
Symbol Value Unit
Junction to ambient¹ natural convection
Single layer board (1s)
R_eJA
53
ºC/W
Junction to ambient¹ natural convection
Four layer board (2s2p)
R_eJA
30
ºC/W
Junction to ambient¹ (at 200 ft/min)
Single layer board (1s)
R_eJMA
44
ºC/W
Junction to ambient¹ (at 200 ft/min)
Four layer board (2s2p)
R_eJMA
27
ºC/W
Junction to boards²
—
R_eJB
19
ºC/W
Junction to case (top)³
—
R_eJCtop
10
ºC/W
Junction to package top⁴
Natural convection
Ψ_JT
2
ºC/W
1 _{Junction-to-ambient thermal resistance determined per JEDC JESD51-3 and JESD51-6. Thermal test board meets JEDEC}
specification for this package.
2 _{Junction-to-board thermal resistance determined per JEDC JESD51-8. Thermal test board meets JEDEC specification for this}
package.
3 _{Junction-to-case at the top of the package determined using MIL-STD 883 Method 1012.1. The cold plate temperature is used}
for the case temperature. Reported value includes the thermal resistance of the interface layer.
4 _{Thermal characterization parameter indicating the temperature difference between the package top and the junction}
temperature per JEDEC JESD51-2. When Greek letters are not available, this thermal characterization parameter is written
as Psi-JT.
4.7 I/O Pin DC Electrical Characteristics
I/O pins are of two types: GPIO and DDR. DDR pins can be configured in three different drive strength
modes: mobile DDR, SDRAM, and DDR2. The SDRAM and mobile DDR modes can be further
customized at three drive strength levels: normal, high, and max.
Table 12 shows currents for the different DDR pin drive strength modes.
Table 12. DDR Pin Drive Strength Mode Current Levels
Drive Mode
Normal
High
Max.
Mobile DDR (1.8 V)
SDRAM (1.8 V)
SDRAM (3.3 V)
DDR2 (1.8 V)
3.6 mA
—
4 mA
—
7.2 mA
—
8 mA
—
10.8 mA
6.5 mA
12 mA
13.4 mA
i.MX35 Applications Processors for Industrial and Consumer Products, Rev. 8
Freescale Semiconductor
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