Datasheet

MAX3380E/MAX3381E
+2.35V to +5.5V, 1µA, 2Tx/2Rx RS-232 Transceivers
with ±15kV ESD-Protected I/O and Logic Pins
_______________________________________________________________________________________ 3
PARAMETER
SYMBOL
CONDITIONS MIN
TYP MAX
UNITS
AutoShutdown Plus (FORCEON = GND, FORCEOFF = V
L
)
Positive threshold 2.7
Receiver Input Threshold to
INVALID Output High
Figure 3
Negative threshold
-2.7
V
Receiver Input Threshold to
INVALID Output Low
Figure 3
-0.3
0.3 V
Receiver Positive or Negative
Threshold to INVALID High
t
INVL
V
CC
= +5.0V, Figure 4 0.3 µs
Receiver Positive or Negative
Threshold to INVALID Low
t
INVH
V
CC
= +5.0V, Figure 4 30 µs
Receiver or Transmitter Edge to
Transmitters Enabled
t
WU
V
CC
= +5.0V, Figure 4 15 µs
Receiver or Transmitter Edge to
Transmitters Shutdown
t
AU T OS H D N
V
CC
= +5.0V, Figure 4 30 s
TRANSMITTER OUTPUTS
V
CC
Mode Switch Point
(V
CC
Falling)
T_OUT = ±5.0V to ±3.7V
2.95
3.1
3.25
V
V
CC
Mode Switch Point
(V
CC
Rising)
T_OUT = ±3.7V to ±5.5V 3.3 3.5 3.7 V
V
CC
Mode Switch Point
Hysteresis
400
mV
V
C C
= + 3.25V to + 5.5V ,
V
C C
fal l i ng
±5
±5.4
Output Voltage Swing
All transmitter
outputs loaded
with 3kΩ to ground
V
C C
= + 2.5V to + 2.95V ,
V
C C
fal l i ng
±3.7
V
Output Resistance V
CC
= 0, transmitter output = ±2.0V
300 10M
Ω
Output Short-Circuit Current ±60
mA
Output Leakage Current V
OUT
= ±12V, transmitters disabled ±25 µA
ESD PROTECTION
Human Body Model
±15
IEC 1000-4-2 Air-Gap Discharge Method
±15
R_IN, T_OUT, R_OUT, T_IN,
FORCEON, FORCEOFF
IEC 1000-4-2 Contact Discharge Method ±8
kV
ELECTRICAL CHARACTERISTICS (continued)
(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.)