
M
±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V,
Up to 1Mbps, True RS-232 Transceivers
______________________________________________________________________________________
13
MAX3222E
MAX3232E
MAX3237E
MAX3241E
5k
R_ IN
R_ OUT
C2-
C2+
C1-
C1+
V-
V+
V
CC
C4
C3
C1
C2
0.1
μ
F
V
CC
T_ OUT
T_ IN
GND
1000pF
Figure 7. Loopback Test Circuit
2
μ
s/div
T1IN
T1OUT
R1OUT
5V/div
5V/div
5V/div
V
CC
= 3.3V
C1
–
C4 = 0.1
μ
F
Figure 8. MAX3241E Loopback Test Result at 120kbps
2
μ
s/div
T1IN
T1OUT
R1OUT
5V/div
5V/div
5V/div
V
CC
= 3.3V, C1
–
C4 = 0.1
μ
F
Figure 9. MAX3241E Loopback Test Result at 250kbps
+5V
0
+5V
0
-5V
+5V
0
T_IN
T_OUT
5k
+ 250pF
R_OUT
400ns/div
V
CC
= 3.3V
C1
–
C4 = 0.1
μ
F
Figure 10. MAX3237E Loopback Test Result at 1000kbps
(MBAUD = V
CC
)
5
SYSTEM
POWER-SUPPLY
VOLTAGE
(V)
5
3.3
Compatible with ACT
and HCT CMOS, and
with AC, HC, or
CD4000 CMOS
COMPATIBILITY
Compatible with all
TTL and CMOS fami-
lies
Compatible with all
CMOS families
3.3
V
CC
SUPPLY
VOLTAGE
(V)
5
3.3
Table 3. Logic-Family Compatibility with
Various Supply Voltages