FN7288 Rev 4.00

Page 10 of 12

January 26, 2012

EL7457

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Quarter Size Outline Plastic Packages Family (QSOP)

0.010

C A B

SEATING

PLANE

DETAIL X

E

E1

1

(N/2)

(N/2)+1

N

PIN #1

I.D. MARK

b

0.004 C

c

A

SEE DETAIL "X"

A2

4°±4°

GAUGE

PLANE

0.010

L

A1

D

B

H

C

e

A

0.007

C A B

L1

MDP0040

QUARTER SIZE OUTLINE PLASTIC PACKAGES FAMILY

SYMBOL

INCHES

TOLERANCE NOTES

QSOP16 QSOP24 QSOP28

A

0.068

0.068

0.068

Max.

-

A1

0.006

0.006

0.006

±0.002

-

A2

0.056

0.056

0.056

±0.004

-

b

0.010

0.010

0.010

±0.002

-

c

0.008

0.008

0.008

±0.001

-

D

0.193

0.341

0.390

±0.004

1, 3

E

0.236

0.236

0.236

±0.008

-

E1

0.154

0.154

0.154

±0.004

2, 3

e

0.025

0.025

0.025

Basic

-

L

0.025

0.025

0.025

±0.009

-

L1

0.041

0.041

0.041

Basic

-

N

16

24

28

Reference

-

Rev. F 2/07

NOTES:

1. Plastic or metal protrusions of 0.006” maximum per side are not

included.

2. Plastic interlead protrusions of 0.010” maximum per side are not

included.

3. Dimensions “D” and “E1” are measured at Datum Plane “H”.

4. Dimensioning and tolerancing per ASME Y14.5M-1994.