3V, ±15kV ESD-Protected, AutoShutdown Plus
RS-232 Transceiver for PDAs and Cell Phones
MAX3387E
TIMING CHARACTERISTICS
(V
CC
= V
L
= +3V to +5.5V; C1–C4 = 0.1µF, tested at +3.3V ±10%; C1 = 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 V
CC
= V
L
= +3.3V, T
A
= +25°C.)
PARAMETER
Maximum Data Rate
Receiver Propagation Delay
Time to Exit Shutdown
Transmitter Skew
Receiver Skew
Transition-Region Slew
Rate
t
PHL
t
PLH
SYMBOL
CONDITIONS
R
L
= 3kΩ, C
L
= 1000pF,
one transmitter switching
Receiver input to receiver output,
C
L
= 150pF
MIN
250
0.15
0.15
100
100
50
C
L
= 150pF to
1000pF
C
L
= 150pF to
2500pF
6
4
30
V/µs
30
TYP
MAX
UNITS
kbps
µs
µs
ns
ns
⏐
V
T_OUT
⏐
> +3.7V
⏐
t
PHL
- t
PLH
⏐
(Note 2)
⏐
t
PHL
- t
PLH
⏐
V
CC
= +3.3V,
T
A
= +25°C,
R
L
= 3kΩ to 7kΩ,
measured from +3V
to -3V or -3V to +3V
Note 2:
Transmitter skew is measured at the transmitter zero crosspoints.
Typical Operating Characteristics
(V
CC
= V
L
= +3.3V, T
A
= +25°C, unless otherwise noted.)
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3387E-01
SLEW RATE vs. LOAD CAPACITANCE
14
12
SLEW RATE (V/µs)
SLEW RATE -
10
8
6
4
SLEW RATE +
MAX3387E-02
7.5
5.0
OUTPUT VOLTAGE (V)
2.5
0
-2.5
-5.0
DATA RATE = 250kbps
LOAD = 3kΩ IN PARALLEL WITH C
L
16
2
-7.5
0
1000
2000
3000
4000
5000
LOAD CAPACITANCE (pF)
0
0
1000
2000
3000
4000
5000
LOAD CAPACITANCE (pF)
4
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
