LTC1535CSWPBF LINER [Linear Technology], LTC1535CSWPBF Datasheet - Page 4

• Manufacturer Part Number: LTC1535CSWPBF
• Description: Isolated RS485 Transceiver
• Manufacturer: LINER [Linear Technology]

ELECTRICAL CHARACTERISTICS
LTC1535
SYMBOL PARAMETER
t
f
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: RS422 50Ω specifi cation based on RS485 27Ω test.
Note 3: I
GND2 ≤ V
Note 4: Input fault conditions on the RS485 receiver are detected with a
fi xed receiver offset. The offset is such that an input short or open will
result in a high data output.
Note 5: The low voltage detect faults when V
V
through the weak driver output on RE.
temperature range, otherwise specifi cations are at T
4
SJ
MAX
PLH
PHL
r
ZH
ZL
LZ
HZ
PLH
PHL
PLH
PHL
r
LZ
HZ
START
TOF
, t
, t
UVL
f
f
and reenables when greater than V
IN
CC2
is tested at V
Data Sample Jitter
Max Baud Rate
Driver Input to Output
Driver Input to Output
Driver Rise or Fall Time
Driver Enable to Output
Driver Enable to Output
Driver Disable to Output
Driver Disable to Output
Receiver Input to RO
Receiver Input to RO
Receiver Input to RO2
Receiver Input to RO2
Receiver Rise or Fall Time
Receiver Disable to Output
Receiver Disable to Output
Initial Start-Up Time
Data Time-Out Fault
ST1, ST2 Duty Cycle
≤ 5.25V.
CC2
= 5V, guaranteed by design from
UVH
. The fault can be monitored
CC2
or V
CC
drops below
A
= 25°C. V
CONDITIONS
Figure 8, (Note 7)
Jitter = 10% Max, SLO = 1, (Note 8)
DE = 1, SLO = 1, Figure 4, Figure 6
DE = 1, SLO = 0, Figure 4, Figure 6
DE = 1, SLO = 1, Figure 4, Figure 6
DE = 1, SLO = 1, Figure 4, Figure 6
DE = 1, SLO = 1, Figure 4, Figure 6
DE = 1, SLO = 0, V
DI = 1, SLO = 1, Figure 5, Figure 7
DI = 0, SLO = 1, Figure 5, Figure 7
DI = 0, SLO = 1, Figure 5, Figure 7
DI = 1, SLO = 1, Figure 5, Figure 7
RE = 0, Figure 3, Figure 8
RE = 0, Figure 3, Figure 8
RE = 0, Figure 3, Figure 8
RE = 0, Figure 3, Figure 8
RE = 0, Figure 3, Figure 8
Figure 3, Figure 9
Figure 3, Figure 9
(Note 9)
(Note 9)
0°C ≤ T
–40°C ≤ T
The
A
≤ 70°C
l
CC
A
≤ 85°C
denotes the specifi cations which apply over the full operating
= 5V, V
Note 6: Value derived from 1 second test.
Note 7: The input signals are internally sampled and encoded. The internal
sample rate determines the data output jitter since the internal sampling is
asynchronous with respect to the external data. Nominally, a 4MHz internal
sample rate gives 250ns of sampling uncertainty in the input signals.
Note 8: The maximum baud rate is 250kBd with 10% sampling jitter.
Lower baud rates have lower jitter.
Note 9: Start-up time is the time for communication to recover after a fault
condition. Data time-out is the time a fault is indicated on RE after data
communication has stopped.
Note 10: I
CC
CC2
= V
CC2
= 5V, R = 27Ω (RS485) unless otherwise noted.
CC
= 4.5V
measured with no load, ST1 and ST2 fl oating.
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
MIN
250
150
1300
1300
1000
1000
1200
1200
TYP
250
410
600
600
500
700
700
600
600
20
30
30
20
30
30
1560
1560
1000
1400
1400
1300
1300
MAX
285
855
855
100
855
855
56
57
UNITS
1535fb
kBd
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
%
%