SPC58EG80C3 datasheet(117/139 Pages) STMICROELECTRONICS

117 / 139 page

DS11758 Rev 6

117/139

SPC584Gx, SPC58EGx, SPC58NGx

Package information

120

Figure 52. eTQFP144 leadframe pad design

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

Table 68. eTQFP144 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”.

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