MAX3224E/MAX3225E/
MAX3226E/MAX3227E/MAX3244E/MAX3245E
±15kV ESD-Protected, 1”A, 1Mbps, 3.0V to 5.5V,
RS-232 Transceivers with AutoShutdown Plus
TIMING CHARACTERISTICSâMAX3224E/MAX3226E/MAX3244E
(VCC = +3V to +5.5V, C1âC4 = 0.1”F, tested at 3.3V ±10%; C1 = 0.047”F, C2âC4 = 0.33”F, tested at 5.0V ±10%; TA = TMIN to TMAX,
unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Maximum Data Rate
RL = 3kΩ, CL = 1000pF,
one transmitter switching
250
kbps
Receiver Propagation Delay
tPHL
tPLH
R_IN to R_OUT, CL = 150pF
Receiver Output Enable Time
Normal operation (MAX3244E only)
0.15
”s
0.15
200
ns
Receiver Output Disable Time
Normal operation (MAX3244E only)
200
ns
Transmitter Skew
â tPHL - tPLH â (Note 3)
Receiver Skew
â tPHL - tPLH â
Transition-Region Slew Rate
VCC = 3.3V, TA = +25°C,
RL = 3kΩ to 7kΩ,
measured from +3V to -3V
or -3V to +3V, one trans-
CL = 150pF
to 1000pF
6
mitter switching
100
ns
50
ns
30
V/”s
TIMING CHARACTERISTICSâMAX3225E/MAX3227E/MAX3245E
(VCC = +3V to +5.5V, C1âC4 = 0.1”F, tested at 3.3V ±10%; C1 = 0.047”F, C2âC4 = 0.33”F, tested at 5.0V ±10%; TA = TMIN to TMAX,
unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
RL = 3kΩ, CL = 1000pF,
one transmitter switching
250
Maximum Data Rate
VCC = 3.0V to 4.5V, RL = 3kΩ,
CL = 250pF, one transmitter switching
1000
kbps
VCC = 4.5V to 5.5V, RL = 3kΩ,
CL = 1000pF, one transmitter switching
1000
Receiver Propagation Delay
tPHL
tPLH
R_IN to R_OUT, CL = 150pF
0.15
”s
0.15
Receiver Output Enable Time
Normal operation (MAX3245E only)
200
ns
Receiver Output Disable Time
Normal operation (MAX3245E only)
200
ns
Transmitter Skew
Receiver Skew
Transition-Region Slew Rate
â tPHL - tPLH â
â tPHL - tPLH â
(Note 3)
VCC = 3.3V, TA = +25°C,
RL = 3kΩ to 7kΩ, CL = 150pF to 1000pF,
measured from +3V to -3V or -3V to +3V,
one transmitter switching
25
ns
50
ns
24
150 V/”s
Note 2: A transmitter/receiver edge is defined as a transition through the transmitter/receiver input logic thresholds.
Note 3: Transmitter skew is measured at the transmitter zero cross points.
4
Maxim Integrated