LTC2803 LINER [Linear Technology], LTC2803 Datasheet - Page 5

• Manufacturer Part Number: LTC2803
• Description: Multiprotocol Transceiver
• Manufacturer: LINER [Linear Technology]

swiTching characTerisTics
temperature range, otherwise specifications are at T
noted. V
SYMBOL
RS485 AC Characteristics
t
t
t
t
t
t
t
t
t
t
t
t
t
RS232 AC Characteristics
t
t
t
t
t
t
t
t
t
Power Supply Generator
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2. All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to device ground unless
otherwise specified.
Note 3. Guaranteed by other measured parameters and not tested directly.
PLHD485
PHLD485
SKEWD485
RD485
ZLD485
LZD485
ZHSD485
PLHR485
SKEWR485
RR485
ZLR485
LZR485
RTEN485
PHLD232
SKEWD232
ZLD232
LZD232
PHLR232
SKEWR232
RR232
ZLR232
LZR232
, t
, t
, t
, t
, t
, t
, t
, t
, t
, t
, t
FD485
FR485
, t
FR232
, t
, t
, t
, t
ZHD485
HZD485
ZHR485
HZR485
ZHD232
HZD232
ZHR232
HZR232
L
RTZ485
ZLSD485
PHLR485
PLHD232
PLHR232
≤ V
CC
,
,
.
PARAMETER
Maximum Data Rate
Driver Propagation Delay
Driver Propagation Delay Difference
|t
Driver Skew (Y to Z)
Driver Rise or Fall Time
Driver Output Enable or Disable Time
Driver Enable from Shutdown
Receiver Input to Output
Differential Receiver Skew
|t
Receiver Output Rise or Fall Time
Receiver Output Enable or Disable Time
Termination Enable or Disable Time
Maximum Data Rate
Driver Slew Rate (Figure 9)
Driver Propagation Delay
Driver Skew
Driver Output Enable or Disable Time
Receiver Propagation Delay
Receiver Skew
Receiver Rise or Fall Time
Receiver Output Enable or Disable Time
V
PLHD485
PLHR485
DD
/V
EE
Supply Rise Time
– t
– t
PHLD485
PHLR485
|
|
A
= 25°C. V
CONDITIONS
(Note 3)
R
R
R
R
FEN = V
FEN = 0V, R
C
(Note 5)
C
C
FEN = V
FEN = V
R
R
R
R
R
R
FEN = V
C
C
C
FEN = V
FEN =
L
L
L
L
L
L
DIFF
DIFF
DIFF
DIFF
L
L
L
L
L
L
The
= 15pF , V
= 15pF (Figure 6)
= 15pF (Figure 6)
= 150pF (Figure 11)
= 150pF (Figure 11)
= 150pF (Figure 11)
= 3kΩ, C
= 3kΩ, C
= 3kΩ, C
= 3kΩ, C
= 3kΩ, C
= 3kΩ, C
= 54Ω, C
= 54Ω, C
= 54Ω, C
= 54Ω, C
l
L
L
L
L
L
CC
, R
, R
, V
, R
, R
, (Notes 3 and 4)
denotes the specifications which apply over the full operating
= V
L
L
L
B
L
L
CM
L
L
L
L
L
L
= 500Ω, C
= 500Ω, C
= 1k, C
= 0V, V
= 3kΩ, C
= 1kΩ, C
= 2500pF ,
= 500pF (Note 3)
= 2500pF
= 50pF
= 50pF (Figure 9)
= 50pF (Figure 9)
L
L
L
L
Note 4. Time from FEN
components as shown in typical application.
Note 5. Condition applies to A, B for H/F = 0V, and Y, Z for H/F = V
Note 6. This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions.
Overtemperature protection activates at a junction temperature exceeding
150°C. Continuous operation above the specified maximum operating
junction temperature may result in device degradation or failure.
Note 7. Guaranteed by design and not subject to production test.
L
= 1.5V, |A–B| = 1.5V, (Figure 6)
= 100pF (Figure 4)
= 100pF (Figure 4)
= 100pF (Figure 4)
= 100pF (Figure 4)
= 3.3V, TE485_1 = TE485_2 = 0V, LB = 0V unless otherwise
AB
L
= 15pF (Figure 7)
L
L
= 2V (Figure 8) (Note 5)
L
L
= 50pF (Figure 10)
= 150pF (Figure 12)
= 50pF (Figure 5)
= 50pF (Figure 5)
until V
DD
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
≥ 5V and V
MIN
100
500
20
4
EE
≤ –5V. External
TYP
1.5
7.6
0.2
0.4
0.7
0.2
20
55
30
50
60
25
60
LTC2872
1
1
3
1
MAX
120
100
200
200
70
±8
15
85
15
85
30
6
2
9
2
2
2
2
L
.
UNITS
Mbps
5
kbps
kbps
V/µs
V/µs
2872f
ms
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
µs
ns
µs
ns
ns
ns
µs