ST485E ST Microelectronics, ST485E Datasheet - Page 4

• Manufacturer Part Number: ST485E
• Description: LOW POWER RS-485/RS-422 TRANSCEIVER
• Manufacturer: ST Microelectronics

ST485E
DRIVER SWITCHING CHARACTERISTICS
(V
(See Note 1)
Note 1: All currents into device pins are positive; all cuttents out of device pins are negative; all voltages are referenced to device ground
unless specified.
RECEIVER SWITCHING CHARACTERISTICS
(V
(See Note 1)
Note 1: All currents into device pins are positive; all cuttents out of device pins are negative; all voltages are referenced to device ground
unless specified.
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Symbol
Symbol
CC
CC
f
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
MAX
t
PZH
PHZ
SKD
PZH
PHZ
PLH
TLH
THL
PZL
PLZ
PLH
PZL
PLZ
PHL
PHL
SK
= 5V 5%, T
= 5V 5%, T
Propagation Delay Input to
Output
Output Skew to Output
Rise or Fall Time
Output Enable Time
Output Enable Time
Output Disable Time
Output Disable Time
Propagation Delay Input to
Output
Differential Receiver Skew
Output Enable Time
Output Enable Time
Output Disable Time
Output Disable Time
Maximum Data Rate
Parameter
Parameter
A
A
= T
= T
MIN
MIN
to T
to T
MAX
MAX
R
(See Fig. 3 and 5)
R
(See Fig. 3 and 5)
R
(See Fig. 3 and 5)
C
(See Fig. 4 and 6)
C
(See Fig. 4 and 6)
C
(See Fig. 4 and 6)
C
(See Fig. 4 and 6)
R
(See Fig. 3 and 7)
R
(See Fig. 3 and 7)
C
(See Fig. 2 and 8)
C
(See Fig. 2 and 8)
C
(See Fig. 2 and 8)
C
(See Fig. 2 and 8)
, unless otherwise specified. Typical values are referred to T
, unless otherwise specified. Typical values are referred to T
DIFF
DIFF
DIFF
L
L
L
L
DIFF
DIFF
RL
RL
RL
RL
= 100pF
= 100pF
= 15pF
= 15pF
= 15pF
= 15pF
= 15pF
= 15pF
= 54
= 54
= 54
= 54
= 54
Test Conditions
Test Conditions
C
C
C
S2 = Closed
S1 = Closed
S1 = Closed
S2 = Closed
C
C
S2 = Closed
S1 = Closed
S1 = Closed
S2 = Closed
L1
L1
L1
L1
L1
= C
= C
= C
= C
= C
L2
L2
L2
L2
L2
= 100pF
= 100pF
= 100pF
= 100pF
= 100pF
Min.
Min.
5
Typ.
Typ.
110
25
15
35
25
25
35
13
13
11
11
2
5
Max.
Max.
130
45
40
50
40
40
50
10
35
35
35
35
5
A
A
= 25°C)
= 25°C)
Mbps
Unit
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns