M
±15kV ESD-Protected, 1μA, 1Mbps, 3.0V to 5.5V,
RS -232 Transc eivers with AutoS hutdown Plus
4
_______________________________________________________________________________________
TIMING CHARACTERISTICS—MAX3224E/MAX3226E/MAX3244E
(V
CC
= +3V to +5.5V, C1–C4 = 0.1μF, tested at 3.3V ±10%; C
L
= 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.)
CONDITIONS
SYMBOL
PARAMETER
TIMING CHARACTERISTICS—MAX3225E/MAX3227E/MAX3245E
(V
CC
= +3V to +5.5V, C1–C4 = 0.1μF, tested at 3.3V ±10%; C
L
= 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.)
CONDITIONS
SYMBOL
PARAMETER
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.
C
L
= 150pF
to 2500pF
C
L
= 150pF
to 1000pF
R_IN to R_OUT, C
L
= 150pF
R
L
= 3k
, C
L
= 1000pF,
one transmitter switching
V
CC
= 3.3V, T
A
= +25°C,
R
L
= 3k
to 7k
,
measured from +3V to -3V
or -3V to +3V
Normal operation (MAX3244E only)
Normal operation (MAX3244E only)
(Note 3)
0.15
200
200
100
50
t
PLH
μs
0.15
t
PHL
kbps
250
Maximum Data Rate
Receiver Propagation Delay
V/μs
4
30
6
30
Transition-Region Slew Rate
ns
ns
ns
ns
Receiver Output Enable Time
Receiver Output Disable Time
Transmitter Skew
Receiver Skew
t
PHL
- t
PLH
t
PHL
- t
PLH
UNITS
MIN
TYP
MAX
V
CC
= 4.5V to 5.5V, R
L
= 3k
,
C
L
= 1000pF, one transmitter switching
V
CC
= 3.0V to 4.5V, R
L
= 3k
,
C
L
= 250pF, one transmitter switching
R
L
= 3k
, C
L
= 1000pF,
one transmitter switching
V
CC
= 3.3V, T
A
= +25°C,
R
L
= 3k
to 7k
, C
L
= 150pF to 1000pF,
measured from +3V to -3V or -3V to +3V
(Note 3)
R_IN to R_OUT, C
L
= 150pF
Normal operation (MAX3245E only)
Normal operation (MAX3245E only)
1000
1000
kbps
250
Maximum Data Rate
V/μs
24
150
Transition-Region Slew Rate
ns
50
t
PHL
- t
PLH
Receiver Skew
ns
25
t
PHL
- t
PLH
Transmitter Skew
μs
0.15
0.15
200
200
t
PHL
t
PLH
Receiver Propagation Delay
ns
ns
Receiver Output Enable Time
Receiver Output Disable Time
UNITS
MIN
TYP
MAX