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| MAX3440E_15 Datasheet, PDF (5/19 Pages) Maxim Integrated Products – ±15kV ESD-Protected, ±60V Fault-Protected,10Mbps, Fail-Safe RS-485/J1708 Transceivers | |||
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MAX3440EâMAX3444E
±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
SYMBOL
CONDITIONS
MIN TYP MAX
Driver Propagation Delay
tPLHA,
tPLHB
Figure 3, RL = 27â¦, CL = 50pF
60
Driver Differential Propagation Delay
tDPLH,
tDPHL
Figure 4, RL = 54â¦, CL = 50pF
60
Driver Differential Output
Transition Time
tLH,tHL Figure 4, RL = 54â¦, CL = 50pF
25
UNITS
ns
ns
ns
Driver Output Skew
tSKEWAB,
tSKEWBA
RL = 54â¦, CL = 50pF,
tSKEWAB = |tPLHA - tPHLB|,
tSKEWBA = |tPLHB - tPHLA|
10
ns
Differential Driver Output Skew
tDSKEW
RL = 54â¦, CL = 50pF,
tDSKEW = |tDPLH - tDPHL|
10
ns
Maximum Data Rate
Driver Enable Time to Output High
Driver Disable Time from Output High
Driver Enable Time from Shutdown to
Output High
fMAX
10
tPDZH Figure 5, RL = 500â¦, CL = 50pF
tPDHZ Figure 5, RL = 500â¦, CL = 50pF
tPDHS Figure 5, RL = 500â¦, CL = 50pF (MAX3443E)
1200
1200
Mbps
ns
ns
4.2
µs
Driver Enable Time to Output Low
Driver Disable Time from Output Low
Driver Enable Time from Shutdown to
Output Low
tPDZL
tPDLZ
tPDLS
Figure 6, RL = 500â¦, CL = 50pF
Figure 6, RL = 500â¦, CL = 50pF
Figure 6, RL = 500â¦, CL = 50pF (MAX3443E)
1200 ns
1200 ns
4.2
µs
Driver Time to Shutdown
Receiver Propagation Delay
Receiver Output Skew
Receiver Enable Time to Output High
Receiver Disable Time from Output
High
Receiver Wake Time from Shutdown
Receiver Enable Wake Time from
Shutdown
tSHDN
tRPLH,
tRPHL
tRSKEW
tRPZH
Figure 6, RL = 500â¦, CL = 50pF (MAX3443E)
Figure 7, CL = 20pF, VID = 2V, VCM = 0V
CL = 20pF, tRSKEW = |tRPLH - tRPHL|
Figure 8, RL = 1kâ¦, CL = 20pF
tRPHZ Figure 8, RL = 1kâ¦, CL = 20pF
tRPWAKE Figure 8, RL = 1kâ¦, CL= 20pF (MAX3443E)
tRPSH Figure 8, RL = 1kâ¦, CL = 20pF
800 ns
85
ns
15
ns
400 ns
400 ns
4.2
µs
400 ns
Receiver Disable Time from Output Low tRPLZ Figure 8, RL = 1kâ¦, CL= 20pF
400 ns
Receiver Time to Shutdown
tSHDN RL = 500â¦, CL= 50pF (MAX3443E)
800 ns
Note 2: âVOD and âVOC 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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