+3.0V to +5.5V, 1µA, up to 250kbps, True
RS-232 Transceiver with AutoShutdown Plus™
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +5.5V; C1–C4 = 0.1µF (tested at 3.3V ±5%), C1–C4 = 0.22µF (tested at 3.3V ±10%), C1 = 0.047µF and
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.)
PARAMETER
AutoShutdown
(FORCEON = GND,
FORCEOFF
= V
CC
)
Receiver Input Threshold to
INVALID
Output High
Receiver Input Threshold to
INVALID
Output Low
INVALID
Output Voltage Low
INVALID
Output Voltage High
Receiver Positive or Negative
Threshold to
INVALID
High (t
INVH
)
Receiver Positive or Negative
Threshold to
INVALID
Low (t
INVL
)
Receiver or Transmitter Edge to
Transmitters Enabled (t
WU
)
Receiver or Transmitter Edge to
Shutdown (t
AUTOSHDN
)
TRANSMITTER OUTPUTS
Output Voltage Swing
Output Resistance
Output Short-Circuit Current
Output Leakage Current
TIMING CHARACTERISTICS
Maximum Data Rate
Receiver Propagation Delay
Receiver Output Enable Time
Receiver Output Disable Time
Transmitter Skew
Receiver Skew
R
L
= 3kΩ, C
L
= 1000pF, one transmitter switching
R_IN to R_OUT,
C
L
= 150pF
Normal operation
Normal operation
| t
PHL
- t
PLH
|
| t
PHL
- t
PLH
|
V
CC
= 3.3V,
T
A
= +25°C,
R
L
= 3Ω to 7kΩ,
measured from +3V to
-3V or -3V to +3V
C
L
= 150pF to 1000pF
C
L
= 150pF to 2500pF
6
t
PHL
t
PLH
250
0.15
0.15
200
200
100
50
30
V/µs
4
30
kbps
µs
ns
ns
ns
ns
All transmitter outputs loaded with 3kΩ to ground
V
CC
= V+ = V- = GND, T
OUT
= 2V
V
CC
≤
3.6V
V
CC
> 3.6V
V
OUT
= ±12V, V
CC
= 0V to 5.5V,
transmitters disabled
±5.0
300
±5.4
10M
±35
±40
±60
±100
±25
V
Ω
mA
µA
Positive threshold
Figure 7a
Negative threshold
Figure 4a
I
OUT
= 1.6mA
I
OUT
= -1.0mA
V
CC
= 5V, Figure 4b
V
CC
= 5V, Figure 4b
V
CC
= 5V, Figure 4b (Note 2)
Figure 4b (Note 2)
15
V
CC -
0.6
0.1
50
25
30
60
-2.7
-0.3
0.3
0.4
V
V
V
µs
µs
µs
sec
2.7
V
CONDITIONS
MIN
TYP
MAX
UNITS
MAX3238
Transition-Region Slew Rate
Note 2:
A transmitter/receiver edge is defined as a transition through the transmitter/receiver input logic thresholds.
_______________________________________________________________________________________
3
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
