Datasheet

MAX3250
±50V Isolated, 3.0V to 5.5V,
250kbps, 2 TX/2 RX, RS-232 Transceiver
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 3.0V to 5.5V, see Typical Operating Circuit and Table 1 for capacitor values, ISOCOM = GND, T
A
= T
MIN
to T
MAX
, unless oth-
erwise noted. Typical values are at V
CC
= 3.3V and T
A
= +25°C.) (Note 2)
PARAMETER CONDITIONS
MIN TYP MAX
UNITS
RECEIVER INPUTS (relative to ISOCOM)
Input-Voltage Range -25
+25
V
V
CC
= 3.3V 1.2 0.6
Input Threshold Low T
A
= +25°C
V
CC
= 5.0V 1.3 0.8
V
V
CC
= 3.3V 2.4 1.6
Input Threshold High T
A
= +25°C
V
CC
= 5.0V 2.4 1.7
V
Input Hysteresis 0.5 V
Input Resistance T
A
= +25°C 3 5 7 kΩ
TRANSMITTER OUTPUTS (relative to ISOCOM)
Output-Voltage Swing
All transmitter outputs loaded with 3kΩ to ISOCOM,
T
A
= +25°C
±5.0 ±5.4
V
Output Resistance ISOVCC = V+ = V- = 0V, V
T_OUT
= ±2V
300 10M
Ω
Output Short-Circuit Current -60
+60
mA
Output Leakage Current V
CC
= 0 or 3V to 5.5V, V
T_OUT
= ±12V, SHDN = GND -25
+25
µA
TIMING CHARACTERISTICS
(V
CC
= 3.0V to 5.5V, see Typical Operating Circuit and Table 1 for capacitor values, ISOCOM = GND, T
A
= T
MIN
to T
MAX
, unless oth-
erwise noted. Typical values are at V
CC
= 3.3V and T
A
= +25°C.)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Maximum Data Rate
R
L
= 3kΩ, C
L
= 1000pF to ISOCOM, one transmitter,
T
A
= +25°C
250 kbps
Receiver Propagation Delay R_IN to R_OUT, C
L
= 150pF to GND 0.4 µs
Receiver Skew |t
PHL
- t
PLH
| 100 ns
Transmitter Skew |t
PHL
- t
PLH
| (Note 3) 120 ns
C
L
= 150pF to 1000pF
to ISOCOM
630
Transition-Region Slew Rate
V
CC
= 3.3V, T
A
= +25°C,
R
L
= 3kΩ to 7kΩ to ISOCOM,
measured from +3V to -3V or
-3V to +3V
C
L
= 150pF to 2500pF
to ISOCOM
430
V/µs
FAULT Propagation Delay 0.3 µs
Time to Shutdown 0.5 µs
V
ISOCOM
= GND 300
Time to Exit Shutdown
V
ISOCOM
= ±50V 350
µs
Note 2: All currents into the device are positive; all currents out of the device are negative. All voltages are referenced to device
ground, unless otherwise noted.
Note 3: Transmitter skew is measured at the transmitter zero crosspoints.