MAX3440E(2002) 查看數據表（PDF） - Maxim Integrated
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MAX3440E
(Rev.:2002)
(Rev.:2002)
Maxim Integrated
MAX3440E Datasheet PDF : 20 Pages
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±15kV ESD-Protected, ±60V Fault-Protected,
10Mbps, Fail-Safe RS-485/J1708 Transceivers
SWITCHING CHARACTERISTICS (MAX3441E/MAX3443E)
(VCC = +4.75V to +5.25V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25°C.)
PARAMETER
Driver Propagation Delay
Driver Differential Propagation Delay
Driver Differential Output
Transition Time
SYMBOL
CONDITIONS
tPLHA,
tPLHB
Figure 3, RL = 27Ω, CL = 50pF
tDPLH,
tDPHL
Figure 4, RL = 54Ω, CL = 50pF
tLH,tHL Figure 4, RL = 54Ω, CL = 50pF
MIN TYP MAX UNITS
60
ns
60
ns
25
ns
Driver Output Skew
tSKEWAB,
tSKEWBA
RL = 54Ω, CL = 50pF,
tSKEWAB = |tPLHA - tPHLB|,
tSKEWBA = |tPLHB - tPHLA|
10
ns
Differential Driver Output Skew
tDSKEW
RL = 54Ω, CL = 50pF,
tDSKEW = |tDPLH - tDPHL|
Maximum Data Rate
fMAX
10
Driver Enable Time to Output High
tPDZH Figure 5, RL = 500Ω, CL = 50pF
Driver Disable Time from Output High
tPDHZ Figure 5, RL = 500Ω, CL = 50pF
Driver Enable Time from Shutdown to
Output High
tPDHS Figure 5, RL = 500Ω, CL = 50pF (MAX3443E)
Driver Enable Time to Output Low
Driver Disable Time from Output Low
Driver Enable Time from Shutdown to
Output Low
Driver Time to Shutdown
tPDZL
tPDLZ
tPDLS
tSHDN
Figure 6, RL = 500Ω, CL = 50pF
Figure 6, RL = 500Ω, CL = 50pF
Figure 6, RL = 500Ω, CL = 50pF (MAX3443E)
Figure 6, RL = 500Ω, CL = 50pF (MAX3443E)
Receiver Propagation Delay
tRPLH,
tRPHL
Figure 7, CL = 20pF, VID = 2V, VCM = 0
Receiver Output Skew
Receiver Enable Time to Output High
Receiver Disable Time from Output High
Receiver Wake Time from Shutdown
tRSKEW
tRPZH
tRPHZ
tRPWAKE
CL = 20pF, tRSKEW = |tRPLH - tRPHL|
Figure 8, RL = 1kΩ, CL = 20pF
Figure 8, RL = 1kΩ, CL = 20pF
Figure 8, RL = 1kΩ, CL= 20pF (MAX3443E)
Receiver Enable Wake Time from
Shutdown
tRPSH Figure 8, RL = 1kΩ, CL = 20pF
Receiver Disable Time from Output Low
Receiver Time to Shutdown
tRPLZ
tSHDN
Figure 8, RL = 1kΩ, CL= 20pF
RL = 500Ω, CL= 50pF (MAX3443E)
10
ns
1200
1200
Mbps
ns
ns
4.2
µs
1200 ns
1200 ns
4.2
µs
800 ns
85
ns
15
ns
400 ns
400 ns
4.2
µs
400 ns
400 ns
800 ns
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 before foldback current limiting; the short-circuit foldback output
current applies during current limiting to allow a recovery from bus contention.
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