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MAX232MJE

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39
Typical Operating Characteristics
MAX225/MAX244–MAX249
18
2
012345
TRANSMITTER SLEW RATE
vs. LOAD CAPACITANCE
8
6
4
16
MAX220-10
LOAD CAPACITANCE (nF)
TRANSMITTER SLEW RATE (V/μs)
14
12
10
V
CC
= +5V
EXTERNAL POWER SUPPLY
1μF CAPACITORS
40kb/s DATA RATE
8 TRANSMITTERS
LOADED WITH 3kΩ
10
-10
0
5 10 15 20 25 30 35
OUTPUT VOLTAGE
vs. LOAD CURRENT FOR V+ AND V-
-2
-4
-6
-8
8
MAX220-11
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
6
4
2
0
V+ AND V- LOADED
EITHER V+ OR
V- LOADED
V+ AND V- LOADED
V
CC
= +5V
EXTERNAL CHARGE PUMP
1μF CAPACITORS
8 TRANSMITTERS
DRIVING 5kΩ AND
2000pF AT 20kb/s
V- LOADED
V+ LOADED
9.0
5.0
01
2
345
TRANSMITTER OUTPUT VOLTAGE (V+, V-)
vs. LOAD CAPACITANCE AT
DIFFERENT DATA RATES
6.0
5.5
8.5
MAX220-12
LOAD CAPACITANCE (nF)
V+, V- (V)
8.0
7.5
7.0
6.5
V
CC
= +5V WITH ALL TRANSMITTERS DRIVEN
LOADED WITH 5kΩ
40kb/s
60kb/s
100kb/s
200kb/s
ALL CAPACITIORS 1μF
10kb/s
20kb/s
Maxim Integrated | 10www.maximintegrated.com
MAX220–MAX249
+5V-Powered, Multichannel
RS-232 Drivers/Receivers
MAX220–MAX249
+5V-Powered, Multichannel
RS-232 Drivers/Receivers
Maxim Integrated | 11www.maximintegrated.com
INPUT
OUTPUT
+3V
V+
0V
V-
0V
t
PLHT
t
PHLT
t
PHLR
t
PHLS
t
PLHR
t
PLHS
50%
V
CC
50%
+3V
50%
INPUT
OUTPUT
*EXCEPT FOR R2 ON THE MAX243
WHERE -3V IS USED.
0V*
50%
GND
Figure 1. Transmitter Propagation-Delay Timing
Figure 2. Receiver Propagation-Delay Timing
EN
R
X
IN
a) TEST CIRCUIT
b) ENABLE TIMING
c) DISABLE TIMING
EN INPUT
RECEIVER
OUTPUTS
R
X
OUT
R
X
1kΩ
0V
+3V
EN
EN
+0.8V
+3.5V
OUTPUT ENABLE TIME (t
ER
)
V
CC
- 2V
V
OL
+ 0.5V
V
OH
- 0.5V
OUTPUT DISABLE TIME (t
DR
)
V
CC
- 2V
+3V
0V
150pF
EN INPUT
V
OH
RECEIVER
OUTPUTS
V
OL
1 OR 0
T
X
3kΩ
50pF
-5V
+5V
OUTPUT DISABLE TIME (t
DT
)
V+
SHDN
+3V
0V
V-
0V
a) TIMING DIAGRAM
b) TEST CIRCUIT
Figure 3. Receiver-Output Enable and Disable Timing
Figure 4. Transmitter-Output Disable Timing
Test Circuits/Timing Diagrams
Maxim Integrated | 12www.maximintegrated.com
MAX220–MAX249
+5V-Powered, Multichannel
RS-232 Drivers/Receivers
ENT ENR
OPERATION STATUS TRANSMITTERS RECEIVERS
0 0 Normal Operation All Active All Active
0 1 Normal Operation All Active All High-Z
1 0 Shutdown All High-Z All Low-Power Receive Mode
1 1 Shutdown All High-Z All High-Z
Table 1a. MAX245 Control Pin Configurations
ENT ENR
OPERATION
STATUS
TRANSMITTERS RECEIVERS
TA1–TA4 TB1–TB4 RA1–RA5 RB1–RB5
0 0 Normal Operation All Active All Active All Active All Active
0 1 Normal Operation All Active All Active
RA1–RA4 High-Z,
RA5 Active
RB1–RB4 High-Z,
RB5 Active
1 0 Shutdown All High-Z All High-Z
All Low-Power
Receive Mode
All Low-Power
Receive Mode
1 1 Shutdown All High-Z All High-Z
RA1–RA4 High-Z,
RA5 Low-Power
Receive Mode
RB1–RB4 High-Z,
RB5 Low-Power
Receive Mode
Table 1b. MAX245 Control Pin Configurations
Table 1c. MAX246 Control Pin Configurations
ENA ENB
OPERATION
STATUS
TRANSMITTERS RECEIVERS
TA1–TA4 TB1–TB4 RA1–RA5 RB1–RB5
0 0 Normal Operation All Active All Active All Active All Active
0 1 Normal Operation All Active All High-Z All Active
RB1–RB4 High-Z,
RB5 Active
1 0 Shutdown All High-Z All Active
RA1–RA4 High-Z,
RA5 Active
All Active
1 1 Shutdown All High-Z All High-Z
RA1–RA4 High-Z,
RA5 Low-Power
Receive Mode
RB1–RB4 High-Z,
RA5 Low-Power
Receive Mode
Control Pin Configuration Tables
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39

MAX232MJE

Mfr. #:
Buy MAX232MJE
Manufacturer:
Maxim Integrated
Description:
MULTICHANNEL RS-232 DRIVERS/RECE
Lifecycle:
New from this manufacturer.
Delivery:
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