MAX3224E/MAX3225E/
MAX3226E/MAX3227E/MAX3244E/MAX3245E
±±15kV ESD-Potected,V±µA,V±Mbps,V3.0kVtoV1.1k,
RED232VTPansceivePsVwithVAutoEhutdownV-lus
______________________________________________________________ -inVSescPiption
PIN
MAX3224E
MAX3225E
MAX3226E
MAX3227E
MAX3244E
MAX3245E
SO/ SSOP/ TSSOP
NAME
FUNCTION
MAX3245E
TQFN
DIP/
SSOP/
TQFN
SSOP/
TSSOP
TQFN
TSSOP
Ready to Transmit Output,
active-high. READY is
enabled high when V- goes
below -4V and the device is
ready to transmit.
19
1
14
1
—
—
READY
Positive Terminal of Voltage-
Doubler Charge-Pump
Capacitor
1
20
2
2
3
4
5
6
7
16
15
1
2
3
4
5
6
7
28
27
24
1
31
30
26
33
34
35
C1+
V+
+5.5V generated by the
charge pump
Negative Terminal of Voltage-
Doubler Charge-Pump
Capacitor
C1-
C2+
C2-
V-
Positive Terminal of Inverting
Charge-Pump Capacitor
3
2
Negative Terminal of
Inverting Charge-Pump
Capacitor
4
3
2
-5.5V Generated by the
Charge Pump
5
4
3
6, 15
7, 14
8, 17
9, 16
10
5
13
8
9, 10, 11
4-8
7, 8, 9
1-5
T_OUT
R_IN
RS-232 Transmitter Outputs
RS-232 Receiver Inputs
15, 16, 17,
19, 20
8, 13
10, 15
6
9
15-19
R_OUT
TTL/CMOS Receiver Outputs
Valid Signal Detector Output,
active low. A logic high
indicates that a valid RS-232
level is present on a receiver
input.
9
11
7
8
10
11
21
23
INVALID
10, 11
12, 13
12-14
11, 12, 13
T_IN
TTL/CMOS Transmitter Inputs
Maxim Integrated
7