Datasheet

MAX3325
3V Dual RS-232 Transceiver with
LCD Supply and Contrast Controller
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0.22µF
0.22µF
3V INPUT
UP
V+
V
DD
V
CC
LCD DISPLAY
MODULE
V
EE
V
SS
C1-
C1+
C2-
REG
LCD
GND
FB
DAC
REF+
REF-
TEMP
T
C2+
V-
DOWN
0.22µF
MAX3325
0.22µF
0.22µF
0.33µF
0.33µF
4.7µF
0.47µF
10k
T1IN
T2IN
V
L
6-BIT
DAC
SDLCD
SD232
POS
REG
NEG
REG
-1
T1OUT
RS-232
OUTPUTS
RS-232
INPUTS
TTL/CMOS
OUTPUTS
TTL/CMOS
INPUTS
R1OUT
R2OUT
T2OUT
R1IN
R2IN
5V AT 15mA
OUTPUT
LCD BIAS
(0 TO -5V)
Typical Operating Circuit