+5V-Powered, Multichannel
RS-232 Drivers/Receivers
MAX220–MAX249
Electrical Characteristics—MAX220/222/232A/233A/242/243 (continued)
F unless otherwise notedꢂ) (Note .)
ꢄMA
(V
= +5V ±±10% C±ꢀCꢁ = 1ꢂ±ꢃµF ꢄMAXX1% C± = 1ꢂ1ꢁ4ꢃµ% CXꢀCꢁ = 1ꢂ..ꢃµ% ꢅ = ꢅ
to ꢅ
CC
M
ꢄIN
PARAMETER
CONDITIONS
MIN
TYP
0.±
0.6
0.6
MAX
UNITS
MAX222/MAX232A/MAX233/
MAX242/MAX243
1
3
1
t
t
, Figure 2
, Figure 2
PHLR
PLHR
MAX220
Receiver Propagation Delay RS-232 to
TLL (Normal Operation)
μs
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
0.ꢀ
0.±
2.±
12±
160
3
t
t
t
t
, Figure 2
, Figure 2
MAX242
10
Receiver Propagation Delay RS-232 to
TLL (Shutdown)
PHLS
PHLS
ER
μs
MAX242
10
Receiver-Output Enable Time
Receiver-Output Disable Time
MAX242, Figure 3
MAX242, Figure 3
±00
±00
ns
ns
DR
MAX222/MAX242, 0.1μF
caps (includes charge-pump
start-up), Figure 4
Transmitter-Output Enable Time
(SHDN Goes High)
t
2±0
600
μs
ns
ET
DT
Transmitter-Output Disable Time
(SHDN Goes Low)
MAX222/MAX242,
0.1μF caps, Figure 4
t
MAX222/MAX232A/MAX233/
MAX242/MAX243
300
2000
100
Transmitter + to - Propagation Delay
Difference (Normal Operation)
t
t
- t
ns
ns
PHLT PLHT
MAX220
MAX222/MAX232A/MAX233/
MAX242/MAX243
Receiver + to - Propagation Delay
Difference (Normal Operation)
- t
PHLR PLHR
MAX220
22±
Note 3: Mll units are production tested at hotꢂ Specifications over temperature are guaranteed by designꢂ
Note 4: ꢄMAXꢁ. RXOUꢅ is guaranteed to be low when RXIN ≥ 1V or is unconnectedꢂ
Typical Operating Characteristics
MAX220/MAX222/MAX232A/MAX233A/MAX242/MAX243
AVAILABLE OUTPUT CURRENT
MAX222/MAX242
vs. DATA RATE
ON-TIME EXITING SHUTDOWN
OUTPUT VOLTAGE vs. LOAD CURRENT
10
8
11
10
+10V
1μF
V+
OUTPUT LOAD CURRENT
FLOWS FROM V+ TO V-
1μF CAPS
EITHER V+ OR V- LOADED
V+
6
0.1μF CAPS
+5V
+5V
ALL CAPS
0.1μF
V
CC
= +5V
9
8
7
6
5
4
4
1μF
NO LOAD ON
TRANSMITTER OUTPUTS
(EXCEPT MAX220, MAX233A)
SHDN
V
= +5.25V
= +4.75V
0V
0V
2
0
CC
ALL CAPS
0.1μF
V- LOADED, NO LOAD ON V+
-2
-4
-6
-8
-10
V
CC
1μF CAPS
0.1μF
1μF
0.1μF CAPS
V-
V-
V+ LOADED, NO LOAD ON V-
10 15 20 25
LOAD CURRENT (mA)
-10V
0
5
0
10
20
30
40
50
60
500μs/div
DATA RATE (kb/s)
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