Datasheet

(V
CC
= +3.0V to +5.5V, C1–C4 = 0.1μF (Note 2), T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
Note 2: MAX3222/MAX3232/MAX3241: C1–C4 = 0.1μF tested at 3.3V ±10%; C1 = 0.047μF, C2–C4 = 0.33μF tested at 5.0V ±10%.
MAX3237: C1–C4 = 0.1μF tested at 3.3V ±5%; C1–C4 = 0.22μF tested at 3.3V ±10%; C1 = 0.047μF, C2–C4 = 0.33μF
tested at 5.0V ±10%.
Note 3: Transmitter input hysteresis is typically 250mV.
(V
CC
= +3.3V, 235kbps data rate, 0.1μF capacitors, all transmitters loaded with 3kΩ, T
A
= +25°C, unless otherwise noted.)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Maximum Data Rate
R
L
= 3kΩ, C
L
= 1000pF, one transmitter switching,
MBAUD = GND
250
kbps
V
CC
= 3.0V to 4.5V, R
L
= 3kΩ, C
L
= 250pF,
one transmitter switching, MBAUD = V
CC
1000
V
CC
= 4.5V to 5.5V, R
L
= 3kΩ, C
L
= 1000pF,
one transmitter switching, MBAUD = V
CC
1000
Receiver Propagation Delay R_IN to R_OUT, C
L
= 150pF
t
PHL
0.15
µs
t
PLH
0.15
Receiver Output Enable Time Normal operation 200 ns
Receiver Output Disable Time Normal operation 200 ns
Transmitter Skew
| t
PHL
- t
PLH
|, MBAUD = GND 100 ns
| t
PHL
- t
PLH
|, MBAUD = V
CC
25 ns
Receiver Skew | t
PHL
- t
PLH
| 50 ns
Transition-Region Slew Rate
V
CC
= 3.3V, R
L
= 3Ω to 7kΩ,
+3V to -3V or -3V to +3V,
T
A
= +25°C
C
L
= 150pF
to 1000pF
MBAUD =
GND
6 30
V/μs
MBAUD =
V
CC
24 150
C
L
= 150pF to 2500pF,
MBAUD = GND
4 30
Timing Characteristics—MAX3237
Typical Operating Characteristics
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
0
MAX3222/MAX3232
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3222-01
LOAD CAPACITANCE (pF)
TRANSMITTER OUTPUT VOLTAGE (V)
2000 30001000 4000 5000
V
OUT
+
V
OUT
-
0
2
4
6
8
10
12
14
16
18
20
22
150
MAX3222/MAX3232
SLEW RATE
vs. LOAD CAPACITANCE
MAX3222-02
LOAD CAPACITANCE (pF)
SLEW RATE (V/µs)
2000 30001000 4000 5000
FOR DATA RATES UP TO 235kbps
+SLEW
-SLEW
0
5
10
15
20
25
30
35
40
0
MAX3222/MAX3232
SUPPLY CURRENT vs. LOAD CAPACITANCE
WHEN TRANSMITTING DATA
MAX3222-03
LOAD CAPACITANCE (pF)
SUPPLY CURRENT (mA)
2000 30001000 4000 5000
235kbps
120kbps
20kbps
MAX3222/MAX3232/
MAX3237/MAX3241
3.0V to 5.5V, Low-Power, Up to 1Mbps,
True RS-232 Transceivers
www.maximintegrated.com
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