w78c31b Winbond Electronics Corp America, w78c31b Datasheet - Page 12

• Manufacturer Part Number: w78c31b
• Description: 8-bit Microcontroller
• Manufacturer: Winbond Electronics Corp America

Expanded External Data Memory and Oscillator
PACKAGE DIMENSIONS
40-pin DIP
8.2 K
E
1
L
A
A
V
2
CC
40
1
S
10 u
OSCILLATOR
B
B
1
D
19
18
13
31
12
14
15
9
1
2
3
4
8
5
6
7
e
1
W78C31B
EA
XTAL1
XTAL2
RST
INT0
INT1
T0
T1
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
PSEN 29
P0.0 39
P0.1 38
P0.2 37
P0.3 36
P0.4 35
P0.5 34
P0.6 33
P0.7 32
P2.0 21
P2.1 22
P2.2 23
P2.3 24
P2.4 25
P2.5 26
P2.6
P2.7 28
RXD
TXD
21
ALE
20
WR
RD
A
1
Base Plane
Seating Plane
27
17
16
30
11
10
Figure B
AD0
- 12 -
AD1
AD2
AD3
AD4
AD5
AD6
AD7
A8
A9
A13
A10
A11
A12
A14
a
AD1
AD7
AD0
AD2
AD3
AD4
AD5
AD6
GND
13
14
17
18
11
3
4
7
8
1
e
E
A
OC
G
D0
D1
D2
D3
D4
D5
D6
D7
74LS373
Q0 2
Q1 5
Q2 6
Q3 9
Q4 12
Q5 15
Q6 16
Q7 19
c
A0
A1
A2
A3
A4
A5
A6
A7
Notes:
Symbol
1. Dimension D Max. & S include mold flash or
2. Dimension E1 does not include interlead flash.
3. Dimension D & E1 include mold mismatch and
4. Dimension B1 does not include dambar
5. Controlling dimension: Inches.
6. General appearance spec. should be based on
A
A
A
B
B
c
D
E
E
e
L
e
S
a
are determined at the mold parting line.
tie bar burrs.
protrusion/intrusion.
final visual inspection spec.
1
2
1
1
1
A
GND
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
0.048
Dimension in inch
0.010
0.150
0.016
0.008
0.540
0.090
0.120
0.590
0.630
Min. Nom.
0
25
24
21
23
26
10
20
22
27
9
8
7
6
5
4
3
2
1
0.050
0.010
2.055
0.600
0.155
0.018
0.545
0.100
0.130
0.650
20256
CE
OE
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
WR
0.160
0.022
0.054
0.014
2.070
0.610
0.550
0.110
0.140
0.670
.
0.210
0.090
Max.
15
W78C31B
D0
D1
D2
D3
D4
D5
D6
D7
14.986
Dimension in mm
13.72
2.286
3.048
16.00
0.254
3.81
0.406
1.219
0.203
Min.
0
11
12
13
15
16
17
18
19
Nom.
15.24
52.20
13.84
3.302
16.51
3.937
0.457
1.27
0.254
2.54
15.494
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
4.064
0.559
1.372
0.356
52.58
2.794
17.01
5.334
13.97
3.556
Max.
2.286
15