Datasheet

MAX3325
3V Dual RS-232 Transceiver with
LCD Supply and Contrast Controller
_______________________________________________________________________________________ 7
C4
0.22µF
C5
0.22µF
UP
C1
0.22µF
C1+
C1-
C2+
C2-
GND
C2
0.22µF
V
DD
V+
LCD
FB
DAC
REF+
REF-
TEMP
REG
V-
DOWN
MAX3325
0.22µF
0.47µF
R
FB
R
OUT
R
REF+8
*
R
REF-
*
R
TEMP
C3
0.22µF
4.7µF
0.22µF
10k
T1IN
T2IN
V
L
C
L
R
L
C
L
R
L
0.22µF
0.22µF
6-BIT
DAC
SDLCD
SD232
T1OUT
R1OUT
R2OUT
5k
5k
T2OUT
R1IN
R2IN
LCD
DISPLAY
*RESISTORS R
REF
+ AND R
REF
- ARE BOTH SHOWN, BUT ONLY ONE OR THE OTHER IS USED IN APPLICATION.
Figure 1. Application Circuit