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MAX232 Datasheet

Multichannel RS-232 Drivers/Receivers

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MAX220–MAX249
+5V-Powered, Multichannel
RS-232 Drivers/Receivers
Electrical Characteristics—MAX225/MAX244–MAX249 (continued)
(MAX225, VCC = +5.0V ±5%; MAX244–MAX249, VCC = +5.0V ±10%, external capacitors C1–C4 = 1µF; TA = TMIN to TMAX; unless
otherwise noted.) (Note 7)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
POWER SUPPLY AND CONTROL LOGIC
Supply Voltage Range
MAX225
MAX244–MAX249
4.75 5.25
V
4.5 5.5
VCC Supply Current
(Normal Operation)
No load
3kΩ loads on
all outputs
MAX225
MAX244–MAX249
MAX225
MAX244–MAX249
10 20
11 30
mA
40
57
Shutdown Supply Current
TA = +25°C
TA = TMIN to TMAX
Leakage current
8 25
µA
50
±1 µA
Control Input
Logic-low voltage
Logic-high voltage
1.4 0.8
V
2.4 1.4
AC CHARACTERISTICS
Transition Slew Rate
CL = 50pF to 2500pF, RL = 3kΩ to 7kΩ, VCC = +5V,
TA = +25°C, measured from +3V to -3V or -3V to +3V
5
10 30 V/µs
Transmitter Propagation Delay
TLL to RS-232 (Normal Operation)
tPHLT, Figure 1
tPLHT, Figure 1
1.3 3.5
µs
1.5 3.5
Receiver Propagation Delay
TLL to RS-232 (Normal Operation)
tPHLR, Figure 2
tPLHR, Figure 2
0.6 1.5
µs
0.6 1.5
Receiver Propagation Delay
TLL to RS-232 (Low-Power Mode)
tPHLS, Figure 2
tPLHS, Figure 2
0.6 10
µs
3.0 10
Transmitter + to - Propagation
Delay Difference (Normal Operation)
tPHLT - tPLHT
350 ns
Receiver + to - Propagation
Delay Difference (Normal Operation)
tPHLR - tPLHR
350 ns
Receiver-Output Enable Time
Receiver-Output Disable Time
tER, Figure 3
tDR, Figure 3
100 500 ns
100 500 ns
Transmitter Enable Time
MAX246–MAX249
(excludes charge-pump startup)
tET
MAX225/MAX245–MAX249
(includes charge-pump startup)
5 µs
10 ms
Transmitter Disable Time
tDT, Figure 4
100 ns
Note 7: All units production tested at hot. Specifications over temperature are guaranteed by design.
Note 8: The 300Ω minimum specification complies with EIA/TIA-232E, but the actual resistance when in shutdown mode or VCC =
0V is 10MΩ as is implied by the leakage specification.
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