L9961 datasheet(57/63 Pages) STMICROELECTRONICS

57 / 63 page

Symbol

Tolerance of form and position

Notes

// // //

The tolerance that controls the position

of the exposed metal heat feature. The

center of the tolerance zone will be the

datum’s defined by the centerlines of the

package body.

Notes

Dimensioning and tolerancing schemes conform to ASME Y14.5M-1994

All Dimensions are in millimeters

Terminal A1 identifier and terminal numbering convention shall conform to JEP95 SPP-002. Terminal A1

identifier must be located within the zone indicated on the outline drawing. Topside terminal A1 indicator

may be a molded, or metalized feature. Optional indicator on bottom surface may be a molded, marked or

metallized feature

Outlines with “D” and “E” increments less than 0.5 mm should be registered as “stand alone” outlines. These

outlines should use as many of the algorithms and dimensions states in the design standard as possible to

insure predictability in manufacturing

Dimension ‘b’ / ‘b1’ / ‘b2’ applies to metallized terminal and is measured between 0.15 mm and 0.30 mm

from the terminal tip. If the terminal has the optional radius on the other end of the terminal, the dimension

‘b’ / ‘b1’ / ‘b2’ should not be measured in that radius area

Inner edge of corner terminals may be chamfered or rounded in order to achieve minimum gap “k”. This

feature should not affect the terminal width “b” / ‘b1’ / ‘b2’, which is measured L/2 from the edge of the

package body

Exact shape of the leads at the edge of the package is optional

“N” is the maximum number of terminal positions for the specified body size. Depopulation is allowed, but

only under the following conditions

–

Depopulation scheme must be consistent in each quadrant of the package.

–

Non-symmetric variations should be broken out as separate mechanical outline variations, including

depopulation graphics

A1 is defined as the distance from the seating plane to the lowest point on the package body (standoff)

10. Dimension D2 and E2 refer to exposed pad. For exposed pad dimensions see variations table Table 43

11. For tolerance of form and position see Table 44.

12. Critical dimensions:

–

12.1 A

–

12.2 A1

–

12.3 A3

–

12.4 D & E

–

12.5 B & L

–

12.6 e

–

12.7 D2 & E2

13. Dimensions “b” / ‘b1’ / ‘b2’ and “L” are measured at terminal plating surface.

14. For symbols, recommended values and tolerances see table Table 44: (according to package or JEDEC

SPEC if registred).

L9961

VFQFPN (5x5x1.00 mm) package information

DS14012 - Rev 1

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