MAX3157CAI View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX3157CAI Datasheet PDF : 13 Pages
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High CMRR RS-485 Transceiver
with ±50V Isolation
SWITCHING CHARACTERISTICS (continued)
(VCC = +5V ±5%, YR = ZR = AR = BR = ISOCOM, C1 = C2 = 0.047µF, C3 = C4 = 1µF. Typical values are at VCC = +5V and TA = +25°C.)
PARAMETER
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable Time from Low
Driver Disable Time from High
Receiver Input to Output
Differential Receiver Skew
|tRPLH - tRPHL|
Receiver Enable to Output Low
Receiver Enable to Output High
Receiver Disable Time from Low
Receiver Disable Time from High
Time to Shutdown
Driver Enable from Shutdown to
Output High
SYMBOL
tDZH
tDZL
tDLZ
tDHZ
tRPLH,
tRPHL
CONDITIONS
Figures 4 and 6, CL = 100pF, S2 closed
Figures 4 and 6, CL = 100pF, S1 closed
Figures 4 and 6, CL = 15pF, S1 closed
Figures 4 and 6, CL = 15pF, S2 closed
Figures 7 and 9; | VID | ≥ 2.0V
tRSKEW Figures 7 and 9; | VID | ≥ 2.0V
tRZL
tRZH
tRLZ
tRHZ
tSHDN
tDZH
(SHDN)
Figures 2 and 8, CL = 100pF, S1 closed
Figures 2 and 8, CL = 100pF, S2 closed
Figures 2 and 8, CL = 100pF, S1 closed
Figures 2 and 8, CL = 100pF, S2 closed
(Note 4)
Figures 4 and 6, CL = 15pF, S2 closed
MIN TYP MAX UNITS
3500 ns
3500 ns
300
ns
300
ns
440
600
ns
20
ns
20
50
ns
20
50
ns
200
500
ns
200
500
ns
50
200
700
ns
0.2
1
ms
Driver Enable from Shutdown to
Output Low
tDZL
(SHDN)
Figures 4 and 6, CL = 15pF, S1 closed
0.2
1
ms
Receiver Enable from Shutdown
to Output High
tRZH
(SHDN)
Figures 2 and 8, CL = 100pF, S2 closed
0.2
1
ms
Receiver Enable from Shutdown
to Output Low
tRZL
(SHDN)
Figures 2 and 8, CL = 100pF, S1 closed
0.2
1
ms
Charge-Pump Oscillating
Frequency
fOSC
1.3
MHz
Note 1: All currents into the device are positive; all currents out of the device are negative. All voltages are referred 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: Current level applies to peak current just prior to foldback-current limiting.
Note 4: The device is put into shutdown by bringing RE high and DE low. 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 700ns, the device is guaran-
teed to have entered shutdown.
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