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MAX233 Datasheet(PDF) 9 Page - Maxim Integrated Products

Part No. MAX233
Description  5V-Powered, Multichannel RS-232 Drivers/Receivers
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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 9 page
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+5V-Powered, Multichannel RS-232
Drivers/Receivers
_______________________________________________________________________________________
9
Operating Supply Voltage
4.75
5.25
V
Transmitter Enable Time
MAX225
10
20
tET
No load
MAX244–MAX249
11
30
510
30
MAX225
40
VCC Supply Current
(Normal Operation)
3k
Ω loads on
all outputs
MAX244–MAX249
57
mA
Transition Slew Rate
825
CL = 50pF to 2500pF, RL = 3k
Ω to 7kΩ, VCC = 5V,
TA = +25°C, measured from +3V to -3V or -3V to +3V
TA = TMIN to TMAX
CONDITIONS
50
V/µs
MAX246–MAX249
(excludes charge-pump startup)
Shutdown Supply Current
µA
5
tPHLT
1.3
3.5
µs
tPLHT
1.5
3.5
Transmitter Disable Time, Figure 4
Transmitter Propagation Delay
TLL to RS-232 (Normal Operation),
Figure 1
µs
tDT
100
ns
Transmitter + to - Propagation
Delay Difference (Normal Operation)
tPHLT - tPLHT
UNITS
MIN
TYP
MAX
350
PARAMETER
ns
Receiver + to - Propagation
Delay Difference (Normal Operation)
tPHLR - tPLHR
350
ns
4.5
5.5
MAX244–MAX249
MAX225
Leakage current
±1
Threshold low
1.4
0.8
Control Input
Threshold high
2.4
1.4
V
µA
TA = +25°C
tPHLR
0.6
1.5
tPLHR
0.6
1.5
Receiver Propagation Delay
TLL to RS-232 (Normal Operation),
Figure 2
µs
tPHLS
0.6
10
tPLHS
3.0
10
Receiver Propagation Delay
TLL to RS-232 (Low-Power Mode),
Figure 2
µs
Receiver-Output Enable Time, Figure 3 tER
100
500
ns
Receiver-Output Disable Time, Figure 3 tDR
100
500
ns
MAX225/MAX245–MAX249
(includes charge-pump startup)
10
ms
POWER SUPPLY AND CONTROL LOGIC
AC CHARACTERISTICS
Note 7: The 300
Ω minimum specification complies with EIA/TIA-232E, but the actual resistance when in shutdown mode or VCC =
0V is 10M
Ω as is implied by the leakage specification.
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 oth-
erwise noted.)




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