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MAX1481 Datasheet(PDF) 4 Page - Maxim Integrated Products

Part No. MAX1481
Description  Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited, 12Mbps, RS-485/RS-422 Transceivers in uMAX Package
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX1481 Datasheet(HTML) 4 Page - Maxim Integrated Products

 
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Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited,
12Mbps, RS-485/RS-422 Transceivers in µMAX Package
4
_______________________________________________________________________________________
SWITCHING CHARACTERISTICS (MAX1481/MAX1485) (continued)
(VCC = 5V ±5%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25°C.)
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: Maximum current level applies to peak current just prior to foldback-current limiting; minimum current level applies during
current limiting.
Note 4: Shutdown is enabled by bringing RE high and DE low. If the enable inputs are in this state for less than 50ns, the MAX1481
is guaranteed not to enter shutdown. If the enable inputs are in this state for at least 600ns, the MAX1481 is guaranteed to
have entered shutdown.
CL = 15pF, S1 closed, Figures 8 and 10
CL = 100pF, S2 closed, Figures 8 and 10
RDIFF = 54Ω, CL1 = CL2 = 100pF,
Figures 7 and 9
CL = 100pF, S1 closed, Figures 8 and 10
RDIFF = 54Ω, CL1 = CL2 = 100pF,
Figures 7 and 9
ns
200
tDLZ
CL = 100pF, S2 closed, Figures 6 and 12
Driver Disable Time from Low
CL = 100pF, S1 closed, Figures 6 and 12
RDIFF = 54Ω, CL1 = CL2 = 100pF,
Figures 7 and 9
ns
3000
tDZH
Driver Enable to Output High
ns
3000
CONDITIONS
tDZL
Driver Enable to Output Low
kbps
250
fMAX
Maximum Data Rate
CL = 15pF, S2 closed, Figures 8 and 10
CL = 100pF, S2 closed, Figures 6 and 12
CL = 100pF, S1 closed, Figures 6 and 12
ns
10
200
tDSKEW
Driver Output Skew
| tDPLH - tDPHL |
Figures 11 and 13
ns
ns
20
50
tRZH
Receiver Enable to Output High
ns
20
50
tRZL
Receiver Enable to Output Low
ns
200
tDHZ
Driver Disable Time from High
ns
ns
20
50
tRHZ
Receiver Disable Time from High
90
150
tRPLH,
tRPHL
Receiver Input to Output
250
1000
tDR, tDF
Driver Rise or Fall Time
ns
20
50
tRLZ
Receiver Disable Time from Low
Figures 11 and 13
ns
15
tRSKD
| tRPLH - tRPHL | Differential
Receiver Skew
600
1000
tDPLH
ns
600
1000
tDPHL
Driver Input to Output
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
MAX1481 only (Note 4)
ns
50
200
600
tSHDN
Time to Shutdown
MAX1481 only, CL = 15pF, S2 closed,
Figures 8 and 10
ns
3000
tDZH(SHDN)
Driver Enable from Shutdown to
Output High
MAX1481 only, CL = 15pF, S1 closed,
Figures 8 and 10
ns
3000
tDZL(SHDN)
Driver Enable from Shutdown to
Output Low
MAX1481 only, CL = 100pF, S1 closed,
Figures 6 and 12
ns
1000
tRZL(SHDN)
Receiver Enable from Shutdown
to Output Low
MAX1481 only, CL = 100pF, S2 closed,
Figures 6 and 12
ns
500
tRZH(SHDN)
Receiver Enable from Shutdown
to Output High


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