Datasheet

MAX13234E–MAX13237E
3Mbps RS-232 Transceivers with
Low-Voltage Interface
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3V to +5.5V, V
L
= +1.62V to V
CC
, T
A
= -40°C to +85°C, C1–C4 = 0.1µF, V
CC
= V
L
, tested at 3.3V ±10%. Typical values are
at T
A
= +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
RECEIVER INPUTS
Input-Voltage Range - 25 +25 V
V
CC
= +3.3V 0.6 1.2
Input Threshold Low V
IL
T
A
= +25°C
V
CC
= +5V 0.8 1.5
V
V
CC
= +3.3V 1.5 2.4
Input Threshold High V
IH
T
A
= +25°C
V
CC
= +5V 1.8 2.4
V
Input Hysteresis 0.5 V
Input Resistance 357kΩ
TRANSMITTER OUTPUTS
Output-Voltage Swing
All transmitter outputs loaded with 3kΩ to
GND
±5 ±5.4 V
Output Resistance
V
CC
= V+ = V- = 0V, transmitter outputs =
±2V
300 10M Ω
Output Short-Circuit Current -60 +60 mA
Output Leakage Current
V
CC
= 0V or +3V to +5.5V, V
OUT
= ±12V,
transmitters disabled
-25 +25 µA
AutoShutdown Plus (FORCEON = GND, FORCEOFF = V
L
)
Positive threshold, Figure 1 2.7 V
Receiver Input Threshold Valid
Level
Negative threshold, Figure 1 -2.7 V
Receiver Input Threshold
Invalid Level
Figure 1 -0.3 +0.3 V
Receiver or Transmitter Edge-to-
Transmitters Enabled
t
WU
V
L
= 5V, Figure 1 (Note 3) 100 µs
Receiver or Transmitter Edge-to-
Transmitters Shutdown
t
AUTOSHDN
V
L
= 5V, Figure 1 (Note 3) 15 30 60 s
TIMING CHARACTERISTICS (MAX13234E/MAX13236E)
Maximum Data Rate
R
L
= 3kΩ, C
L
= 1000pF, one transmitter
switching
250 kbps
Receiver Propagation Delay
t
RPHL
,
t
RPLH
C
L
= 150pF, Figures 2, 3 0.15 µs
Transmitter Skew
|t
TPHL
-
t
TPLH
|
Figures 4, 5 (Note 4) 100 ns
Receiver Skew
|t
RPHL
-
t
RPLH
|
Figures 2, 3 50 ns