SPC58EN80C3RMSBY datasheet(135/158 Pages) STMICROELECTRONICS

135 / 158 page

DS11734 Rev 6

135/158

SPC584Nx, SPC58ENx, SPC58NNx

Package information

138

Figure 51. eLQFP176 leadframe pad design

4.2

FPBGA292 package information

Refer to Section 4.2.1: Package mechanical drawings and data information for full

description of below figures and table notes.

Table 75. eLQFP176 symbol definitions

Symbol

Definition

Notes

aaa

The tolerance that controls the position of

the terminal pattern with respect to Datum A

and B. The center of the tolerance zone for

each terminal is defined by basic dimension

e as related to Datum A and B.

For flange-molded packages, this tolerance

also applies for basic dimensions D1 and

E1. For packages tooled with intentional

terminal tip protrusions, aaa does not apply

to those protrusions.

bbb

The bilateral profile tolerance that controls

the position of the plastic body sides. The

centers of the profile zones are defined by

the basic dimensions D and E.

—

ccc

The unilateral tolerance located above the

seating plane where in the bottom surface of

all terminals must be located.

This tolerance is commonly know as the

“coplanarity” of the package terminals.

ddd

The tolerance that controls the position of

the terminals to each other. The centers of

the profile zones are defined by basic

dimension e.

This tolerance is normally compounded with

tolerance zone defined by “b”.

Note: number, dimensions and positions of grooves are for reference only.

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