Datasheet

±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V,
Up to 1Mbps, True RS-232 Transceivers
TIMING CHARACTERISTICS—MAX3237E
(V
CC
= +3V to +5.5V, C1–C4 = 0.1µF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 3)
Note 3: MAX3222E/MAX3232E/MAX3241E: C1–C4 = 0.1µF tested at +3.3V ±10%; C1 = 0.047µF, C2, C3, C4 = 0.33µF tested at +5.0V
±10%. MAX3237E: C1–C4 = 0.1µF tested at +3.3V ±5%, C1–C4 = 0.22µF tested at +3.3V ±10%; C1 = 0.047µF, C2, C3, C4 =
0.33µF tested at +5.0V ±10%. MAX3246E: C1-C4 = 0.22µF tested at +3.3V ±10%; C1 = 0.22µF, C2, C3, C4 = 0.54µF tested at
+5.0V ±10%.
Note 4: MAX3246E devices are production tested at +25°C. All limits are guaranteed by design over the operating temperature range.
Note 5: The MAX3237E logic inputs have an active positive feedback resistor. The input current goes to zero when the inputs are at
the supply rails.
Note 6: MAX3241EEUI is specified at T
A
= +25°C.
Transmitter skew is measured at the transmitter zero crosspoints.
PARAMETER CONDITIONS MIN TYP MAX UNITS
R
L
= 3kΩ, C
L
= 1000pF, one transmitter switching,
MBAUD = GND
250
V
CC
= +3.0V to +4.5V, R
L
= 3kΩ, C
L
= 250pF,
one transmitter switching, MBAUD = V
CC
1000Maximum Data Rate
V
CC
= +4.5V to +5.5V, R
L
= 3kΩ, C
L
= 1000pF,
one transmitter switching, MBAUD = V
CC
1000
kbps
t
PHL
0.15
Receiver Propagation Delay R_IN to R_OUT, C
L
= 150pF
t
PLH
0.15
µs
Receiver Output Enable Time Normal operation 2.6 µs
Receiver Output Disable Time Normal operation 2.4 µs
|t
PHL
- t
PLH
|, MBAUD = GND
Transmitter Skew (Note 7)
|t
PHL
- t
PLH
|, MBAUD = V
CC
100 ns
Receiver Skew |t
PHL
- t
PLH
|50ns
MBAUD = GND 6 30
C
L
= 150pF
to 1000pF
MBAUD = V
CC
24 150
V
CC
= +3.3V,
R
L
= 3kΩ to 7kΩ,
+3.0V to -3.0V or
-3.0V to +3.0V,
T
A
= +25°C
C
L
= 150pF to 2500pF,
MBAUD = GND
430
V/µs
Transition-Region Slew Rate
TIMING CHARACTERISTICS—MAX3222E/MAX3232E/MAX3241E/MAX3246E
(V
CC
= +3V to +5.5V, C1–C4 = 0.1µF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Notes 3, 4)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
T
A
= T
MIN
to T
MAX
(MAX3222E/MAX3232E/
MAX3241E) (Note 6)
250
Maximum Data Rate
R
L
= 3kΩ,
C
L
= 1000pF,
one transmitter
switching T
A
= + 25°C ( M AX 3246E ) 250
kbps
t
PHL
0.15
Receiver Propagation Delay
t
PLH
Receiver input to receiver output,
C
L
= 150pF
0.15
µs
Receiver Output Enable Time Normal operation (except MAX3232E) 200 ns
Receiver Output Disable Time Normal operation (except MAX3232E) 200 ns
Transmitter Skew |t
PHL
- t
PLH
| (Note 7) 100 ns
Receiver Skew |t
PHL
- t
PLH
|50ns
Transition-Region Slew Rate
V
C C
= + 3.3V , T
A
= + 25°C ,
R
L
= 3kΩ to 7kΩ , m easur ed
fr om + 3.0V to - 3.0V or - 3.0V to
+ 3.0V , one tr ansm i tter sw i tchi ng
C
L
= 150pF
to 1000pF
6 30 V/µs
4
Maxim Integrated
MAX3222E/MAX3232E/MAX3237E/
MAX3241E/MAX3246E