Datasheet

MAX3325
3V Dual RS-232 Transceiver with
LCD Supply and Contrast Controller
_______________________________________________________________________________________ 5
40µs/div
SD232
T2OUT
T1OUT
5V/div
0
2V/div
0
V
CC
= 3.3V
C1–C4 = 0.1µF
TRANSMITTER OUTPUTS EXITING
SHUTDOWN OR POWERING UP
MAX3325toc04
C
L
= 2500pF
2
µs/div
LOOPBACK WAVEFORMS AT 120kbps
T1IN
5V/div
T1OUT/
R1IN
5V/div
R1OUT
5V/div
MAX3325toc05
C
L
= 1000pF
1µs/div
LOOPBACK WAVEFORMS AT 250kbps
T1IN
5V/div
T1OUT/
R1IN
5V/div
R1OUT
5V/div
MAX3325toc06
C
L
= 1000pF
0
2
1
4
3
5
6
02010 30 40
V
REG
vs. LOAD CURRENT
MAX3325toc07
LOAD CURRENT (mA)
V
REG
(V)
V
DD
= +3V
V
DD
= +3.3V
V
DD
= +3.6V
0
2
1
4
3
5
6
02010 30 40
V
REG
vs. LOAD CURRENT
AND TEMPERATURE
MAX3325toc08
LOAD CURRENT (mA)
V
REG
(V)
T
A
= +25°C
T
A
= +85°C
T
A
= -40°C
-4.5
-3.5
-4.0
-2.5
-3.0
-2.0
-1.5
-40 0 20-20 40 60 80 100
TEMP OUTPUT VOLTAGE
vs. TEMPERATURE
MAX3325toc09
TEMPERATURE (°C)
TEMP OUTPUT VOLTAGE (V)
Typical Operating Characteristics (continued)
(V
DD
= V
L
= +3.3V, circuit and components of Figure 1, all transmitters loaded with 3kΩ and C
L
, T
A
= +25°C, unless otherwise noted.)