STC3485E Datasheet, PDF (3/11 Pages) List of Unclassifed Manufacturers – 3.3V-Powered, ±15kV ESD-Protected, and Slew-Rate-Limited True RS-485 Transceivers

Receiver Switching Characteristics
(VCC = 3.3V, TA = +25°C)
PARAMETER
SYMBOL
Maximum Data Rate
Driver Differential Output Delay
tDD
Driver Differential Output Transition Time
tTD
Driver Propagation Delay, Low-to-High Level
tPLH
Driver Propagation Delay, High-to-Low Level
tPHL
|tPLH - tPHL| Driver Propagation Delay Skew (Note 2)
tPDS
DRIVER-OUTPUT ENABLE/DISABLE TIMES
Driver Output Enable Time to Low Level
tPZL
Driver Output Enable Time to High Level
tPZH
Driver Output Disable Time from High Level
tPHZ
Driver Output Disable Time from Low Level
tPLZ
Driver Output Enable Time from Shutdown to Low Level tPSL
Driver Output Enable Time from Shutdown to High Level tPSH
CONDITIONS
RL = 60O, Figure 5
RL = 60O, Figure 5
RL = 27O, Figure 6
RL = 27O, Figure 6
RL = 27O, Figure 6
RL = 110O, Figure 8
RL = 110O, Figure 7
RL = 110O, Figure 7
RL = 110O, Figure 8
RL = 110O, Figure 8
RL = 110O, Figure 7
MIN TYP MAX UNITS
0.5
Mbps
600 900 1400 ns
400 740 1200 ns
700 930 1500 ns
700 930 1500 ns
50
ns
900 1300 ns
600 800 ns
50 80
ns
50 80
ns
1.9 2.7
µs
2.2 3.0
µs
Receiver Switching Characteristics
(VCC = +3.3V, TA = +25°C.)
PARAMETER
Time to Shutdown
Receiver Propagation Delay,
Low-to-High Level
Receiver Propagation Delay,
High-to-Low Level
|tPLH - tPHL| Receiver
Propagation-Delay Skew
Receiver-Output Enable Time
to Low Level
Receiver-Output Enable Time
to High Level
Receiver-Output Disable
Time from High Level
Receiver-Output Disable
Time from Low Level
Receiver-Output Enable Time
from Shutdown to Low Level
Receiver-Output Enable Time
from Shutdown to High Level
SYMBOL
tSHDN
tRPLH
tRPHL
tRPDS
tPRZL
tPRZH
tPRHZ
tPRLZ
tPRSL
tPRSH
CONDITIONS
(Note 3)
VID = 0 to 3.0V, CL = 15pF, Figure 9
STC3485E
VID = 0 to 3.0V, CL = 15pF, Figure 9
STC3485E
VID = 0 to 3.0V, CL = 15pF, Figure 9
STC3485E
CL = 15pF, Figure 10,
STC3485E
CL = 15pF, Figure 10,
STC3485E
CL = 15pF, Figure 10,
STC3485E
CL = 15pF, Figure 10,
STC3485E
CL = 15pF, Figure 12,
STC3485E
CL = 15pF, Figure 10,
STC3485E
MIN
80
25
25
25
25
TYP
190
62
75
62
75
6
12
25
MAX
300
90
120
90
120
±10
±20
UNITS
ns
ns
ns
ns
50
ns
25
50
ns
25
45
ns
25
45
ns
720
1400 ns
720
1400 ns
Note 1: ? VOD and ? VOC are the changes in VOD and VOC, respectively, when the DI input changes state.
Note 2: Measured on |tPLH (Y) - tPHL (Y)| and |tPLH (Z) - tPHL (Z)|.
Note 3: The transceivers are put into shutdown by bringing /RE high and DE low. If the inputs are in this state for less than 80ns, the
parts are guaranteed not to enter shutdown. If the inputs are in this state for at least 300ns, the parts are guaranteed to have entered
shutdown. See Low-Power Shutdown Mode section.