Datasheet

Typical Operating Characteristics
(V
CC
= +3.3V, 250kbps data rate, 0.1µF capacitors, all transmitters loaded with 3kΩ and C
L
, T
A
= +25°C, unless otherwise noted.)
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
0 1000 2000 3000 4000 5000
MAX3221E/MAX3223E
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3221E-01
LOAD CAPACITANCE (pF)
TRANSMITTER OUTPUT VOLTAGE (V)
V
OUT+
T1 TRANSMITTING AT 250kbps
T2 (MAX3223E) TRANSMITTING AT 15.6kbps
V
OUT-
0
2
4
6
8
10
12
14
16
0 1000 2000 3000 4000 5000
MAX3221E/MAX3223E
SLEW RATE vs. LOAD CAPACITANCE
MAX3221-TOC2
LOAD CAPACITANCE (pF)
SLEW RATE (V/µs)
-SLEW
+SLEW
FOR DATA RATES UP TO 250kbps
±15kV ESD-Protected, 1µA, 3.0V to 5.5V, 250kbps,
RS-232 Transceivers with AutoShutdown
TIMING CHARACTERISTICS—MAX3221E/MAX3223E/MAX3243E
(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: C1–C4 = 0.1µF, tested at 3.3V ±10%. C1 = 0.047µF, C2–C4 = 0.33µF, tested at 5.0V ±10%.
Note 3: Transmitter skew is measured at the transmitter zero cross points.
t
PLH
R
L
= 3kΩ, C
L
= 1000pF,
one transmitter switching
t
PHL
SYMBOL
⏐
t
PHL
- t
PLH
⏐
⏐
t
PHL
- t
PLH
⏐
Receiver Output Disable Time ns
CONDITIONS
µs
0.15
Receiver Propagation Delay
C
L
= 150pF to
1000pF
kbps
UNITSMIN TYP MAXPARAMETER
(Note 3)
ns50Receiver Skew
ns100Transmitter Skew
V
CC
= 3.3V,
R
L
= 3kΩ to 7kΩ,
T
A
= +25°C,
measured from +3V
to -3V or
-3V to +3V, one
transmitter switching
V/µsTransition-Region Slew Rate 630
C
L
= 150pF
250
0.15
Maximum Data Rate
nsNormal operationReceiver Output Enable Time
200Normal operation
200
4
Maxim Integrated
MAX3221E/MAX3223E/MAX3243E