Datasheet
-6
-2
-4
2
0
6
4
8
0 1000 1500500 2000 2500 3000
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3380E toc01
LOAD CAPACITANCE (pF)
TRANSMITTER OUTPUT VOLTAGE (V)
V
OUT+
V
OUT-
V
CC
= +4.2V
-6
-2
-4
2
0
6
4
8
0 1000 1500500 2000 2500 3000
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3380E toc02
LOAD CAPACITANCE (pF)
TRANSMITTER OUTPUT VOLTAGE (V)
V
OUT+
V
OUT-
V
CC
= +2.5V
0
5
10
15
20
25
30
35
40
0 1000500 1500 2000 2500 3000
MAX3380E
SLEW RATE vs. LOAD CAPACITANCE
MAX3380E toc03
LOAD CAPACITANCE (pF)
SLEW RATE (V/μs)
V
CC
= +4.2V
V
CC
= +2.5V
Typical Operating Characteristics
(V
CC
= V
L
= +4.2V, C1 = 0.22µF, C2 = C3 = C4 = 1µF, C5 = 0.1µF parallel with 47µF, R
L
= 3kΩ, C
L
= 1000pF, data rate is 250kbps,
T
A
= +25°C, unless otherwise noted.)
MAX3380E/MAX3381E
+2.35V to +5.5V, 1µA, 2Tx/2Rx RS-232 Transceivers
with ±15kV ESD-Protected I/O and Logic Pins
4 _______________________________________________________________________________________
TIMING CHARACTERISTICS
(V
CC
= +2.35V to +5.5V, V
L
= +1.65V to +5.5V. When V
CC
< +4.5V, C1 = C2 = C3 = C4 = 0.1µF; when V
CC
≥ +4.5V, C1 = 0.047µF,
C2 = C3 = C4 = 0.33µF; 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
SYMBOL
CONDITIONS MIN
TYP MAX
UNITS
MAX3381E 250
Maximum Data Rate
R
L
= 3kΩ, C
L
= 1000pF, one
transmitter switching
MAX3380E 460
kbps
t
PLH
0.15
Receiver Propagation Delay
t
PHL
Receiver input to receiver output, C
L
= 100pF
0.15
µs
Transmitter Skew
⏐t
PHL
- t
PLH
⏐
(Note 2)
200
ns
Receiver Skew
⏐t
PHL
- t
PLH
⏐
50 ns
Transition Region Slew Rate
(MAX3380E)
V
CC
= +4.2V, -3.0V < T_OUT< +3.0V,
R
L
= 3kΩ, C
L
= 250pF to 1000pF, T
A
= +25°C
20
100
V/µs
Transition Region Slew Rate
(MAX3381E)
V
CC
= +4.2V, -3.0V < T_OUT< +3.0V,
R
L
= 3kΩ, C
L
= 150pF to 1000pF, T
A
= +25°C
630
V/µs
Transition Region Slew Rate
(MAX3380E)
V
CC
= +2.35V, -3.0V < T_OUT< +3.0V,
R
L
= 3kΩ, C
L
= 250pF to 1000pF, T
A
= +25°C
30
V/µs
Transition Region Slew Rate
(MAX3381E)
V
CC
= +2.35V, -3.0V < T_OUT< +3.0V,
R
L
= 3kΩ, C
L
= 250pF to 1000pF, T
A
= +25°C
10
V/µs
Note 2: Transmitter skew is measured at the transmitter zero crosspoint.