+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.) (Note 3)
PARAMETER
t
PHLR
, Figure 2
Receiver Propagation Delay RS-232 to
TLL (Normal Operation)
t
PLHR
, Figure 2
Receiver Propagation Delay RS-232 to
TLL (Shutdown)
Receiver-Output Enable Time
Receiver-Output Disable Time
Transmitter-Output Enable Time
(SHDN Goes High)
Transmitter-Output Disable Time
(SHDN Goes Low)
Transmitter + to - Propagation Delay
Difference (Normal Operation)
Receiver + to - Propagation Delay
Difference (Normal Operation)
t
PHLS
, Figure 2
t
PHLS
, Figure 2
t
ER
t
DR
t
ET
CONDITIONS
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
MAX242
MAX242
MAX242, Figure 3
MAX242, Figure 3
MAX222/MAX242, 0.1μF
caps (includes charge-pump
start-up), Figure 4
MAX222/MAX242,
0.1μF caps, Figure 4
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
t
PHLR
- t
PLHR
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
MIN
TYP
0.5
0.6
0.6
0.8
0.5
2.5
125
160
250
MAX
1
3
1
3
10
10
500
500
μs
ns
ns
μs
μs
UNITS
t
DT
600
300
2000
100
225
ns
t
PHLT
- t
PLHT
ns
ns
Note 3:
All units are production tested at hot. Specifications over temperature are guaranteed by design.
Note 4:
MAX243 R2OUT is guaranteed to be low when R2IN
≥
0V or is unconnected.
__________________________________________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-
-10V
V-
500μs/div
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 (kb/s)
4
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
