DS33R11 Ethernet Mapper with Integrated T1/E1/J1 Transceiver

13.1Thermal Characteristics Table 13-3. Thermal Characteristics

PARAMETER

MIN

TYP

MAX

 

 

 

 

Ambient Temperature (Note 1)

-40°C

 

+85°C

 

 

 

 

Junction Temperature (Note 2)

 

 

+125°C

 

 

 

 

Theta-JA (θJA) in Still Air for 256-Pin

 

+20.3°C/W

 

27mm BGA (Notes 2, 3)

 

 

 

 

 

 

 

 

 

Note 1: The package is mounted on a four-layer JEDEC standard test board.

Note 2: Value guaranteed by design (GBD).

Note 3: Theta-JA (θJA) is the junction to ambient thermal resistance, when the package is mounted on a four-layer JEDEC standard test board.

Table 13-4. Theta-JA vs. Airflow

AIR FLOW

THETA-JA

256-PIN (27mm) BGA

 

0m/s (Note 1)

20.3°C/W

1m/s (Note 1)

17.9°C/W

2.5m/s (Note 1)

16.9°C/W

Note 1: Value guaranteed by design (GBD).

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Maxim DS33R11 Thermal Characteristics -3. Thermal Characteristics, Theta-JA vs. Airflow, Parameter MIN TYP MAX