+5V-Powered, Multichannel RS-232
Drivers/Receivers
MAX220–MAX249
ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243 (continued)
(V
CC
= +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, T
A
= T
MIN
to T
MAX
‚ unless otherwise noted.)
PARAMETER
t
PHLR
Receiver Propagation Delay RS-232 to
TLL (Normal Operation), Figure 2
t
PLHR
CONDITIONS
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
Receiver Propagation Delay RS-232 to
TLL (Shutdown), Figure 2
Receiver-Output Enable Time, Figure 3
Receiver-Output Disable Time, Figure 3
Transmitter-Output Enable Time (SHDN
Goes High), Figure 4
Transmitter-Output Disable Time (SHDN
Goes Low), Figure 4
t
PHLS
t
PHLS
t
ER
t
DR
t
ET
MAX242
MAX242
MAX242
MAX242
MAX222/MAX242, 0.1µF
caps (includes charge-pump
start-up)
MAX222/MAX242,
0.1µF caps
MAX222/MAX232A/MAX233/
MAX242/MAX243
t
PHLT
- t
PLHT
MAX220
Receiver + to - Propagation Delay
Difference (Normal Operation)
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
2000
100
225
MIN
TYP
0.5
0.6
0.6
0.8
0.5
2.5
125
160
250
MAX
1
3
1
3
10
µs
10
500
500
ns
ns
µs
µs
UNITS
t
DT
600
300
ns
Transmitter + to - Propagation Delay
Difference (Normal Operation)
ns
t
PHLR
- t
PLHR
ns
__________________________________________Typical Operating Characteristics
MAX220/MAX222/MAX232A/MAX233A/MAX242/MAX243
OUTPUT VOLTAGE vs. LOAD CURRENT
MAX220-01
AVAILABLE OUTPUT CURRENT
vs. DATA RATE
MAX220-02
MAX222/MAX242
ON-TIME EXITING SHUTDOWN
1µF CAPS
V+
V+, V- VOLTAGE (V)
+5V
+5V
0V
0V
1µF CAPS
0.1µF CAPS
V-
V-
500µs/div
-10V
0.1µF CAPS
SHDN
V+
MAX220-03
10
8
6
OUTPUT VOLTAGE (V)
4
2
0
-2
-4
-6
-8
-10
0
5
EITHER V+ OR V- LOADED
V
CC
= ±5V
NO LOAD ON
TRANSMITTER OUTPUTS
(EXCEPT MAX220, MAX233A)
V- LOADED, NO LOAD ON V+
0.1µF
1µF
11
10
OUTPUT CURRENT (mA)
9
8
7
6
5
ALL CAPS
0.1µF
ALL CAPS
1µF
V
CC
= +5.25V
OUTPUT LOAD CURRENT
FLOWS FROM V+ TO V-
+10V
0.1µF
1µF
V
CC
= +4.75V
V+ LOADED, NO LOAD ON V-
10
15
20
25
LOAD CURRENT (mA)
4
0
10
20
30
40
50
60
DATA RATE (kbits/sec)
4
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
