Datasheet

Analog Integrated Circuit Device Data

Freescale Semiconductor 16

MC34708

General Product Characteristics

θJMA

Junction to Ambient (@200 ft/min.)

• Single layer board (1s)

48 °C/W

(8),

(10)

θJMA

Junction to Ambient (@200 ft/min.)

• Four layer board (2s2p)

32 °C/W

(8),

(10)

θJB

Junction to Board

22 °C/W

(11)

θJC

Junction to Case

15 °C/W

(12)

θJT

Junction to Package Top

• Natural Convection

3.0 °C/W

(13)

Notes

5. Do not operate above 125 °C for extended periods of time. Operation above 150 °C may cause permanent damage to the IC.

6. Pin soldering temperature limit is for 10 seconds maximum duration. Not designed for immersion soldering. Exceeding these limits may

cause a malfunction or permanent damage to the device.

7. Freescale’s Package Reflow capability meets Pb-free requirements for JEDEC standard J-STD-020C. For Peak Package Reflow

Temperature and Moisture Sensitivity Levels (MSL), Go to www.freescale.com, search by part number [e.g. remove prefixes/suffixes

and enter the core ID to view all orderable parts (i.e. MC33xxxD enter 33xxx), and review parametrics.

8. Junction temperature is a function of on-chip power dissipation, package thermal resistance, mounting site (board) temperature, ambient

temperature, air flow, power dissipation of other components on the board, and board thermal resistance.

9. Per JEDEC JESD51-2 with the single layer board horizontal. Board meets JESD51-9 specification.

10. Per JEDEC JESD51-6 with the board horizontal.

11. Thermal resistance between the die and the printed circuit board per JEDEC JESD51-8. Board temperature is measured on the top

surface of the board near the package.

12. Thermal resistance between the die and the case top surface as measured by the cold plate method (MIL SPEC-883 Method 1012.1).

13. Thermal characterization parameter indicating the temperature difference between package top and the junction temperature per

JEDEC JESD51-2. When Greek letters are not available, the thermal characterization parameter is written as Psi-JT.

Table 5. Thermal Ratings (continued)

Symbol Description (Rating) Min. Max. Unit Notes