UM3352E_15 Datasheet, PDF (4/13 Pages) Union Semiconductor, Inc. – ESD-Protected, Slew-Rate-Limited, Fail-Safe, True RS-485 Transceivers

UM3352E
Switching Characteristics
(V_CC=+5V ± 5%, T_A=-40°C to +85°C, unless otherwise noted. Typical values are at V_CC=+5V and
T_A=+25°C.)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Maximum Data Rate
Driver Input-to-Output
f_MAX
t_DPLH
t_DPHL
Figures 3 and 7, R_DIFF=54Ω,
C_L1=C_L2=100pF
500
kbps
50 1000
ns
50 1000
Driver Output Skew
| t_DPLH - t_DPHL |
t_DSKEW
Figures 3 and 7, R_DIFF=54Ω,
C_L1=C_L2=100pF
15 100 ns
Driver Rise or Fall Time t_DR, t_DF
Figures 3 and 7, R_DIFF=54Ω,
C_L1=C_L2=100pF
100 750 ns
Driver Enable to Output High t_DZH
Figures 4 and 8, C_L=100pF,
S2 Closed
30 2500 ns
Driver Enable to Output Low t_DZL
Figures 4 and 8, C_L=100pF,
S1 Closed
30 2500 ns
Driver Disable Time from
Low
t_DLZ
Figures 4 and 8, C_L=15pF,
S1 Closed
60 200 ns
Driver Disable Time from
High
t_DHZ
Figures 4 and 8, C_L=15pF,
S2 Closed
100 200 ns
Receiver Input to Output
Differential
Receiver Skew
| t_RPLH - t_RPHL |
Receiver Enable to Output
Low
t_RPLH,
t_RPHL
t_RSKD
t_RZL
|V_ID| ≥2.0V,
Rise and Fall Time of V_ID≤15ns
Figures 6 and 9, |V_ID| ≥2.0V,
Rise and Fall Time of V_ID≤15ns
Figures 5 and 10, C_L=100pF,
S1 Closed
75 200 ns
0 30 ns
20 50 ns
Receiver Enable to Output
High
t_RZH
Figures 5 and 10, C_L=100pF,
S2 Closed
20 50 ns
Receiver Disable Time from
Low
t_RLZ
Figures 5 and 10, C_L=100pF,
S1 Closed
20 50 ns
Receiver Disable Time from
High
t_RHZ
Figures 5 and 10, C_L=100pF,
S2 Closed
20 50 ns
Time to Shutdown
t_SHDN
(Note 4)
200 600 ns
Driver Enable from
Shutdown to Output High
t_DZH(SHDN)
Figures 4 and 8, C_L=15pF,
S2 Closed
700 4500 ns
Driver Enable from
Shutdown to Output Low
t_DZL(SHDN)
Figures 4 and 8, C_L=15pF,
S1 Closed
700 4500 ns
Receiver Enable from
Shutdown to Output High ^tRZH(SHDN)
Figures 5 and 10, C_L=100pF,
S2 Closed
700 3500 ns
Receiver Enable from
Shutdown to Output Low ^tRZL(SHDN)
Figures 5 and 10, C_L=100pF,
S1 Closed
700 3500 ns
______
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 600ns, the device is guaranteed to have entered shutdown.
__________________________________________________________________________
http://www.union-ic.com Rev.07 Sep.2015
4/13