Thermal characteristics, Hermal, Haracteristics – Maxim Integrated DS33Z41 User Manual

Page 143: Table 11-4. theta-ja vs. airflow

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DS33Z41 Quad IMUX Ethernet Mapper

143 of 167

Note 1:

Typical power is 145mW.

Note 2:

All outputs loaded with rated capacitance; all inputs between VDD and VSS; inputs with pullups connected to V

Note 3:

RST pin held low, or RST bit set.

Note 4:

RST pin held low, or RST bit set. All clocks stopped.

11.1 Thermal Characteristics

Table 11-3. Thermal Characteristics

PARAMETER MIN

TYP

MAX

NOTES

Ambient Temperature

-40

°C

+85

°C

Junction Temperature

+125

°C

Theta-JA (

) in Still Air for 169-Pin

14mm CSBGA

+52.7

°C/W

Note 1:

The package is mounted on a four-layer JEDEC standard test board.

Note 2:

Theta-JA (

) is the junction to ambient thermal resistance, when the package is mounted on a four-layer JEDEC standard

test board.

Table 11-4. Theta-JA vs. Airflow

AIR FLOW

THETA-JA

0m/s

52.7

°C/W

1m/s

45.8

°C/W

2.5m/s

43.8

°C/W