Intel 8253 - Page 707

Philips Semiconductors Linear Products Product specification
ADC0803/4-1CMOS 8-bit A/D converters
August 31, 1994
567
SCC80C51
A/D
CS
18
17
16
15
14
13
12
11
8 RD
INT
WR
D0
D1
D2
D3
D4
D5
D6
D7
10
6
27
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
P10
18
17
16
15
14
13
12
11
2
3
5
1
RD
INTR
WR
LOWER
P15
RAISE
P16
13 14
1/4
HEF4071
20 GND29 P12
+V
2N3906
1N4148
TO HEATER
1/4
HEF4071
6
2
1
7
3
6
2
1
7
3
RBI
5
NE587
NE587
RBO 4
RBI 5
7
8
10K
7
8
10K
20
19
+5V
V
CC
CLK R
10K
CLK IN
56pF
4
+
10µF
V
IN
(–)
V
IN
(+)
7
D GND 10 8 AGND
LM35
6
Figure 11. Digital Thermostat