Carrier 42HQG018 - Page 53

1PB RST
2TD
3TOL
4GND
8 Vcc
7ST
6 RST
5 RST
MAX1232
Vcc
TOL
TD
PB RST
ST
RST
RST
DEBOUNCE
RESET
GENERATOR
5%/10%
TOLERANCE
SELECT
WATCHDOG
TIMEBASE
SELECT
WATCHDOG
TIMER
GND
REF
+
-
+
MAXIM
MAX1232
MAXIM
6) U7 (7812ACT)/U8 (7805CT): VOLTAGE REGULATOR
100K 500
100
100
0.3
10K
6K
500
1K
5K
28K
6K
30pF
2K
5K
200
240
1.4
K
2.7
K
3.3
K
0.19K
INPUT
OUTPUT
GND
SCHEMATIC DIAGRAM
TSUFFIX
PLASTIC PACKAGE
CASE 221A
TO-220TYPE
PIN 1. INPUT
2. GND
3. OUTPUT
1
2
3
5) U6 (MAX 1232EPA): RESET I.C
52