MAX3463 Просмотр технического описания (PDF) - Maxim Integrated
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MAX3463 Datasheet PDF : 14 Pages
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+5V, Fail-Safe, 20Mbps, Profibus RS-485/
RS-422 Transceivers
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +5V ±5%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25°C.) (Note 1)
PARAMETER
Time to Shutdown
Driver Enable from Shutdown to
Output High
Driver Enable from Shutdown to
Output Low
Receiver Enable from Shutdown to
Output High
Receiver Enable from Shutdown to
Output Low
SYMBOL
tSHDN
tZH (SHDN)
tZL (SHDN)
tZH (SHDN)
tZL (SHDN)
CONDITIONS
(Note 5)
Figures 8 and 9, RL = 500Ω, CL = 50pF,
S2 closed (Note 5)
Figures 8 and 9, RL = 500Ω, CL = 50pF,
S1 closed (Note 5)
Figures 8 and 11, RL = 1kΩ, CL = 15pF,
S2 closed (Notes 4, 5)
Figures 8 and 11, RL = 1kΩ, CL = 15pF,
S1 closed (Notes 4, 5)
MIN TYP MAX UNITS
50
800
ns
4
µs
4
µs
4
µs
4
µs
Note 1: 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 2: ∆VOD and ∆VOC are the changes in VOD and VOC, respectively, when the DI input changes state.
Note 3: The short-circuit output current applies to peak current just prior to foldback-current limiting; the short-circuit foldback output
current applies during current limiting to allow a recovery from bus contention.
Note 4: Capacitive load includes test probe and fixture capacitance.
Note 5: Shutdown is enabled by bringing RE high and DE low or by bringing SHDN high. If the enable inputs are in this state for less
than 50ns, the device is guaranteed not to enter shutdown. If the enable inputs are in this state for at least 800ns, the device
is guaranteed to have entered shutdown.
(VCC = +5V, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics
NO LOAD SUPPLY CURRENT
vs. TEMPERATURE
2.40
2.35
DE = VCC
2.30
2.25
2.20
DE = GND
2.15
2.10
2.05
2.00
-40 -20 0 20 40 60 80
TEMPERATURE (°C)
OUTPUT CURRENT
vs. RECEIVER OUTPUT LOW VOLTAGE
60
50
40
30
20
10
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
OUTPUT LOW VOLTAGE (V)
OUTPUT CURRENT
vs. RECEIVER OUTPUT HIGH VOLTAGE
35
30
25
20
15
10
5
0
0
1
2
3
4
5
OUTPUT HIGH VOLTAGE (V)
4 _______________________________________________________________________________________
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