XR3170E Datasheet, PDF (9/24 Pages) Exar Corporation – 3.3V High Speed RS-485/RS-422 TRANSCEIVERS WITH 1/8 UNIT LOAD

REV. 1.0.0
XR3170E-3178E
3.3V HIGH SPEED RS-485/RS-422 TRANSCEIVERS WITH 1/8^th UNIT LOAD
UNLESS OTHERWISE NOTED: VCC = +3.0V TO +3.6V WITH T_A FROM -40^OC TO +85^OC. TYPICAL VALUES ARE AT
VCC = +3.3V AND 25^OC.
SYMBOL
t_F
t_ZH
t_ZL
t_HZ
t_LZ
t_ZH(SHDN)
t_ZL(SHDN)
t_SHDN
PARAMETERS
Receiver Output Fall Time
Receiver Enable to Output High
Receiver Enable to Output Low
Receiver Disable from Output High
Receiver Disable from Output Low
Shutdown to Receiver Output Valid
High
Shutdown to Receiver Output Valid
Low
Time to Shutdown
MIN. TYP. MAX. UNITS
CONDITIONS
3
6
ns C_L = 15pF
50
ns C_L = 15pF, Figure 14
50
ns C_L = 15pF, Figure 14
50
ns C_L = 15pF, Figure 14
50
ns C_L = 15pF, Figure 14
3500 ns C_L = 15pF, Figure 14
3500 ns C_L = 15pF, Figure 14
50 200 600 ns Notes 3 and 4
NOTE:
1. Change in Magnitude of Differential Output Voltage and Change in Magnitude of Common Mode Output Voltage
are the changes in output voltage when DI input changes state.
2. Except devices which do not have DE or RE inputs.
3. The transceivers are put into shutdown by bringing RE High and DE Low simultaneously for at least 600ns. If the
control inputs are in this state for less than 50ns, the device is guaranteed not enter shutdown. If the enable inputs
are held in this state for at least 600ns the device is assured to be in shutdown. Note that the receiver and driver
enable times increase during shutdown.
4. Guaranteed by design and bench characterization.
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