MAX3250 데이터 시트보기 (PDF) - Maxim Integrated
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MAX3250 Datasheet PDF : 10 Pages
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MAX3250
±50V Isolated, 3.0V to 5.5V, 250kbps,
2 Tx/2 Rx, RS-232 Transceiver
Electrical Characteristics (continued)
(VCC = 3.0V to 5.5V, see Typical Operating Circuit and Table 1 for capacitor values, ISOCOM = GND, TA = TMIN to TMAX, unless oth-
erwise noted. Typical values are at VCC = 3.3V and TA = +25°C.) (Note 2)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
RECEIVER INPUTS (relative to ISOCOM)
Input-Voltage Range
-25
+25
V
Input Threshold Low
Input Threshold High
Input Hysteresis
TA = +25°C
TA = +25°C
VCC = 3.3V
VCC = 5.0V
VCC = 3.3V
VCC = 5.0V
1.2
0.6
V
1.3
0.8
2.4
1.6
V
2.4
1.7
0.5
V
Input Resistance
TA = +25°C
TRANSMITTER OUTPUTS (relative to ISOCOM)
3
5
7
kΩ
Output-Voltage Swing
All transmitter outputs loaded with 3kΩ to ISOCOM,
TA = +25°C
±5.0 ±5.4
V
Output Resistance
Output Short-Circuit Current
Output Leakage Current
ISOVCC = V+ = V- = 0V, VT_OUT = ±2V
VCC = 0 or 3V to 5.5V, VT_OUT = ±12V, SHDN = GND
300 10M
Ω
-60
+60
mA
-25
+25
µA
Timing Characteristics
(VCC = 3.0V to 5.5V, see Typical Operating Circuit and Table 1 for capacitor values, ISOCOM = GND, TA = TMIN to TMAX, unless oth-
erwise noted. Typical values are at VCC = 3.3V and TA = +25°C.)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Maximum Data Rate
Receiver Propagation Delay
Receiver Skew
Transmitter Skew
RL = 3kΩ, CL = 1000pF to ISOCOM, one transmitter,
TA = +25°C
R_IN to R_OUT, CL = 150pF to GND
|tPHL - tPLH|
|tPHL - tPLH| (Note 3)
250
0.4
100
120
kbps
µs
ns
ns
Transition-Region Slew Rate
FAULT Propagation Delay
Time to Shutdown
Time to Exit Shutdown
VCC = 3.3V, TA = +25°C,
RL = 3kΩ to 7kΩ to ISOCOM,
CL = 150pF to 1000pF
to ISOCOM
6
measured from +3V to -3V or
-3V to +3V
CL = 150pF to 2500pF
to ISOCOM
4
30
V/µs
30
0.3
µs
0.5
µs
VISOCOM = GND
VISOCOM = ±50V
300
µs
350
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.
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