MAX3224E/MAX3225E/
MAX3226E/MAX3227E/MAX3244E/MAX3245E
±15kV ESD-Protected, 1µA, 1Mbps, 3.0V to 5.5V,
RS-232 Transceivers with AutoShutdown Plus
TIMING CHARACTERISTICS—MAX3224E/MAX3226E/MAX3244E
(V
CC
= +3V to +5.5V, C1–C4 = 0.1µF, tested at 3.3V ±10%; C
1
= 0.047µF, C2–C4 = 0.33µF, tested at 5.0V ±10%; T
A
= T
MIN
to T
MAX
,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
Maximum Data Rate
Receiver Propagation Delay
Receiver Output Enable Time
Receiver Output Disable Time
Transmitter Skew
Receiver Skew
⏐
t
PHL
- t
PLH
⏐
⏐
t
PHL
- t
PLH
⏐
t
PHL
t
PLH
SYMBOL
CONDITIONS
R
L
= 3kΩ, C
L
= 1000pF,
one transmitter switching
R_IN to R_OUT, C
L
= 150pF
Normal operation (MAX3244E only)
Normal operation (MAX3244E only)
(Note 3)
V
CC
= 3.3V, T
A
= +25°C,
R
L
= 3kΩ to 7kΩ,
measured from +3V to -3V
or -3V to +3V, one trans-
mitter switching
MIN
250
0.15
0.15
200
200
100
50
C
L
= 150pF
to 1000pF
TYP
MAX
UNITS
kbps
µs
ns
ns
ns
ns
Transition-Region Slew Rate
6
30
V/µs
TIMING CHARACTERISTICS—MAX3225E/MAX3227E/MAX3245E
(V
CC
= +3V to +5.5V, C1–C4 = 0.1µF, tested at 3.3V ±10%; C
1
= 0.047µF, C2–C4 = 0.33µF, tested at 5.0V ±10%; T
A
= T
MIN
to T
MAX
,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
R
L
= 3kΩ, C
L
= 1000pF,
one transmitter switching
Maximum Data Rate
V
CC
= 3.0V to 4.5V, R
L
= 3kΩ,
C
L
= 250pF, one transmitter switching
V
CC
= 4.5V to 5.5V, R
L
= 3kΩ,
C
L
= 1000pF, one transmitter switching
Receiver Propagation Delay
Receiver Output Enable Time
Receiver Output Disable Time
Transmitter Skew
Receiver Skew
⏐
t
PHL
- t
PLH
⏐
⏐
t
PHL
- t
PLH
⏐
t
PHL
t
PLH
R_IN to R_OUT, C
L
= 150pF
Normal operation (MAX3245E only)
Normal operation (MAX3245E only)
(Note 3)
MIN
250
1000
1000
0.15
0.15
200
200
25
50
µs
ns
ns
ns
ns
V/µs
kbps
TYP
MAX
UNITS
V
CC
= 3.3V, T
A
= +25°C,
R
L
= 3kΩ to 7kΩ, C
L
= 150pF to 1000pF,
Transition-Region Slew Rate
24
150
measured from +3V to -3V or -3V to +3V,
one transmitter switching
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
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
