
28.6
28T – TSOP
PIN 1
0o ~ 5o
c
Pin 1 Identifier Area
D1 D
L
e
b
L1
E
A2
A
SEATING PLANE
GAGE PLANE
COMMON DIMENSIONS
A1
(Unit of Measure = mm)
SYMBOL
A
A1
A2
MIN
–
0.05
0.90
NOM
–
–
1.00
MAX
1.20
0.15
1.05
NOTE
Notes:
1. This package conforms to JEDEC reference MO-183.
D
13.20
13.40
13.60
2. Dimensions D1 and E do not include mold protrusion. Allowable
protrusion on E is 0.15 mm per side and on D1 is 0.25 mm per side.
3. Lead coplanarity is 0.10 mm maximum.
D1
E
L
11.70
7.90
0.50
11.80
8.00
0.60
11.90
8.10
0.70
Note 2
Note 2
L1
0.25 BASIC
b
c
e
0.17
0.10
0.22
–
0.55 BASIC
0.27
0.21
12/06/02
R
2325 Orchard Parkway
San Jose, CA 95131
TITLE
28T , 28-lead (8 x 13.4 mm) Plastic Thin Small Outline
Package, Type I (TSOP)
DRAWING NO.
28T
REV.
C
22
AT28HC256
0007N–PEEPR–9/09