±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V,
Up to 1Mbps, True RS-232 Transceivers
Pin Description (continued)
PIN
MAX3222E
SO/DIP
16
17
18
—
TSSOP/
SSOP
18
19
20
11, 14
MAX3232E
SO/DIP
15
16
—
—
TSSOP/
SSOP
18
19
—
1, 10,
11, 20
MAX3237E
SSOP/SO
2
26
14*
—
25
26
22
—
QFN
24
26
21
9, 16,
25, 32
GND
V
CC
SHDN
N.C.
Ground
+3.0V to +5.5V Supply Voltage
Shutdown Control. Active low.
No Connection
MegaBaud Control Input.
Connect to GND for normal
operation; connect to VCC for
1Mbps transmission rates.
Noninverting Complementary
Receiver Outputs. Always active.
MAX3241E
NAME
FUNCTION
MAX3222E/MAX3232E/MAX3237E/MAX3241E
—
—
—
—
15*
—
—
MBAUD
—
—
—
—
16
20, 21
19, 20
R_OUTB
*These
pins have an active positive feedback resistor internal to the MAX3237E, allowing unused inputs to be left unconnected.
V
CC
0.1µF
V
CC
V
CC
0.1µF
V
CC
C1+
C1
C1-
C2+
C2
C2-
T_ IN
V+
C3
C1
C1+
C1-
V+
C3
MAX3222E
MAX3232E
MAX3237E
MAX3241E
V-
C4
T_ OUT
C2
C2+
C2-
T_ IN
MAX3222E
MAX3232E
MAX3237E
MAX3241E
V-
C4
T_ OUT
R_ OUT
R_ IN
R_ OUT
R_ IN
5kΩ
GND
3kΩ
2500pF
GND
5kΩ
7kΩ
150pF
MINIMUM SLEW-RATE TEST CIRCUIT
Figure 1. Slew-Rate Test Circuits
MAXIMUM SLEW-RATE TEST CIRCUIT
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7
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
