Typical Operating Characteristics
(VCC = +3.3V, 250kbps data rate, 0.1F capacitors, all transmitters loaded with 3k and CL, TA = +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)
VOUT+
T1 TRANSMITTING AT 250kbps
T2 (MAX3223E) TRANSMITTING AT 15.6kbps
VOUT-
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/
s)
-SLEW
+SLEW
FOR DATA RATES UP TO 250kbps
±15kV ESD-Protected, 1A, 3.0V to 5.5V, 250kbps,
RS-232 Transceivers with AutoShutdown
TIMING CHARACTERISTICS—MAX3221E/MAX3223E/MAX3243E
(VCC = +3.0V to +5.5V, C1–C4 = 0.1F (Note 2), TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
Note 2: C1–C4 = 0.1F, tested at 3.3V ±10%. C1 = 0.047F, C2–C4 = 0.33F, tested at 5.0V ±10%.
Note 3: Transmitter skew is measured at the transmitter zero cross points.
tPLH
RL = 3k, CL = 1000pF,
one transmitter switching
tPHL
SYMBOL
tPHL - tPLH
Receiver Output Disable Time
ns
CONDITIONS
s
0.15
Receiver Propagation Delay
CL = 150pF to
1000pF
kbps
UNITS
MIN
TYP
MAX
PARAMETER
(Note 3)
ns
50
Receiver Skew
ns
100
Transmitter Skew
VCC = 3.3V,
RL = 3k to 7k,
TA = +25°C,
measured from +3V
to -3V or
-3V to +3V, one
transmitter switching
V/s
Transition-Region Slew Rate
630
CL = 150pF
250
0.15
Maximum Data Rate
ns
Normal operation
Receiver Output Enable Time
200
Normal operation
200
4
Maxim Integrated
MAX3221E/MAX3223E/MAX3243E