MAX3232CSE-G05 Maxim Integrated, MAX3232CSE-G05 Datasheet - Page 11

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MAX3232CSE-G05

Manufacturer Part Number
MAX3232CSE-G05
Description
RS-232 Interface IC
Manufacturer
Maxim Integrated
Series
MAX3222, MAX3232, MAX3237, MAX3241r
Datasheet

Specifications of MAX3232CSE-G05

Data Rate
235 Kbps
Operating Supply Voltage
3 V to 5 V
Supply Current
1 mA
Operating Temperature Range
0 C to + 70 C
Mounting Style
SMD/SMT
Function
Transceiver
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Number Of Drivers
2
Number Of I/os
8
Number Of Receivers
2
Propagation Delay Time Ns
0.3 us
Shutdown
No
The MAX3222/MAX3232/MAX3241 maintain the RS-232
±5.0V minimum transmitter output voltage even at high
data rates. Figure 5 shows a transmitter loopback test
circuit. Figure 6 shows a loopback test result at
120kbps, and Figure 7 shows the same test at 235kbps.
For Figure 6, all transmitters were driven simultaneously
at 120kbps into RS-232 loads in parallel with 1000pF.
For Figure 7, a single transmitter was driven at 235kbps,
and all transmitters were loaded with an RS-232 receiver
in parallel with 1000pF.
The MAX3237 maintains the RS-232 ±5.0V minimum
transmitter output voltage at data rates up to 1Mbps.
Figure 8 shows a loopback test result at 1Mbps with
MBAUD = V
loaded with an RS-232 receiver in parallel with 250pF.
Figure 5. Loopback Test Circuit
Maxim Integrated
Transceivers Using Four 0.1µF External Capacitors
3.0V to 5.5V, Low-Power, up to 1Mbps, True RS-232
C1
C2
V
V
0V
CC
CC
*
MAX3222/MAX3241 ONLY
0.1µF
CC
SHDN
C1+
C1-
C2+
C2-
T_ IN
R_ OUT
EN
. For Figure 8, all transmitters were
*
*
MAX3222
MAX3232
MAX3237
MAX3241
GND
V
MAX3222/MAX3232/MAX3237/MAX3241
CC
T_ OUT
5kΩ
R_ IN
High Data Rates
V+
V-
C3
C4
1000pF
Figure 6. MAX3241 Loopback Test Result at 120kbps
Figure 7. MAX3241 Loopback Test Result at 235kbps
Figure 8. MAX3237 Loopback Test Result at 1000kbps
(MBAUD = V
R1OUT
T1OUT
+5V
R1OUT
+5V
+5V
T1OUT
-5V
0V
0V
0V
T1IN
T1IN
V
CC
V
V
= 3.3V
CC
CC
= 3.3V
= 3.3V
CC
)
200ns/div
5µs/div
2µs/div
T_IN
T_OUT = R_IN
5kΩ + 250pF
R_OUT
150pF
5V/div
5V/div
5V/div
5V/div
5V/div
5V/div
11

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