XR3070-78X Datasheet, PDF (6/24 Pages) Exar Corporation – LOW POWER 18V TOLERANT RS-485/RS-422 +3.3V TRANSCEIVERS

XR3070-78X
LOW POWER 18V TOLERANT RS-485/RS-422 +3.3V TRANSCEIVERS
REV. 1.0.2
Unless otherwise noted: V_CC = +3.3V ±10%, T_A = T_MIN to T_MAX. Typical values are at V_CC = 3.3V, T_A = +25°C.
SYMBOL
PARAMETERS
MIN. TYP. MAX. UNITS
CONDITIONS
DRIVER AC CHARACTERISTICS
t_DPLH
Driver Prop. Delay (Low to High)
t_DPHL
Driver Prop. Delay (High to Low)
|t_DPLH-t_DPHL| Differential Driver Output Skew
t_DR, t_DF
Driver Differential Output
Rise or Fall Time
Maximum Data Rate
t_DZH
t_DZL
t_DHZ
t_DLZ
t_DZH(SHDN)
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable from Output High
Driver Disable from Output Low
Driver Enable from Shutdown to
Output High
t_DZL(SHDN)
Driver Enable from Shutdown to
Output Low
t_SHDN
Time to Shutdown
XR3070X, XR3071X and XR3072X (250kbps)
250
1500 ns
250
1500 ns
C_L = 50pF, R_L = 54,
20 200 ns _{Figure 7}
350
1600 ns
250
kbps 1/t_UI, Duty Cycle 40 to 60%
200 2500 ns
200 2500 ns _{CL = 50pF, RL = 500,}
6
100 ns ^{Figure 8}
6
100 ns
5500
5500
ns
C_L = 50pF, R_L = 500,
Figure 8
ns
50 200 600 ns Notes 3 and 4
RECEIVER AC CHARACTERISTICS
t_RPLH
t_RPHL
Receiver Prop. Delay (Low to High)
Receiver Prop. Delay (High to Low)
|t_RPLH-t_RPHL| Receiver Propagation Delay Skew
Maximum Data Rate
t_RZH
Receiver Enable to Output High
t_RZL
Receiver Enable to Output Low
t_RHZ
Receiver Disable from Output High
t_RLZ
t_RZH(SHDN)
Receiver Disable from Output Low
Receiver Enable from Shutdown
to Output High
t_RZL(SHDN)
Receiver Enable from Shutdown
to Output Low
t_SHDN
Time to Shutdown
XR3070X, XR3071X and XR3072X (250kbps)
200
ns _{CL = 15pF, VID = ±2V,}
200 ns _{VID Rise and Fall times < 15nsï€} 
30
ns ^{Figure 9}
250
kbps 1/t_UI, Duty Cycle 40 to 60%
50
ns
50
ns _{CL = 15pF, RL = 1k,}
50
ns ^{Figure 10}
50
ns
3500
3500
ns
C_L = 15pF, R_L = 1k,
Figure 10
ns
50 200 600 ns Notes 3 and 4
6