LTC2852 Linear Technology, LTC2852 Datasheet - Page 5

• Manufacturer Part Number: LTC2852
• Description: 3.3V 20Mbps RS485/RS422 Transceivers
• Manufacturer: Linear Technology

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ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifi cations are at T
SYMBOL
Supplies
I
I
I
I
SWITCHING CHARACTERISTICS
temperature range, otherwise specifi cations are at T
SYMBOL
Driver
f
t
Δt
t
t
t
t
t
t
Receiver
t
t
t
t
t
t
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. High temperatures degrade operating lifetimes.
Operating lifetime is derated at temperatures greater than 105°C.
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 specifi ed.
CCS
CCR
CCT
CCTR
MAX
PLHD
SKEWD
RD
ZLD
LZD
ZHSD
SHDN
PLHR
SKEWR
RR
ZLR
LZR
ZHSR
PD
, t
, t
, t
, t
, t
, t
FD
FR
, t
, t
, t
, t
ZHD
HZD
ZHR
HZR
PHLD
ZLSD
PHLR
ZLSR
,
,
PARAMETER
Supply Current in Shutdown Mode
Supply Current in Receive Mode
Supply Current in Transmit Mode
Supply Current with Both Driver and
Receiver Enabled
PARAMETER
Maximum Data Rate
Driver Input to Output
Driver Input to Output Difference
|t
Driver Output Y to Output Z
Driver Rise or Fall Time
Driver Enable or Disable Time
Driver Enable from Shutdown
Time to Shutdown
Receiver Input to Output
Differential Receiver Skew
|t
Receiver Output Rise or Fall Time
Receiver Enable/Disable
Receiver Enable from Shutdown
PLHD
PLHR
– t
– t
PHLD
PHLR
|
|
A
A
CONDITIONS
DE = 0V, RE = V
LTC2850, LTC2852 (C and I-Grade)
LTC2850, LTC2852 (H-Grade)
DE = 0V, RE = 0V (LTC2850, LTC2852)
No Load, DE = V
LTC2852)
No Load, DE = V
CONDITIONS
(Note 3)
R
R
R
R
R
(LTC2850, LTC2852)
R
(LTC2850, LTC2852)
R
or (DE = 0V, RE = ↑) (Figure 5) (LTC2850,
LTC2852)
C
t
C
C
R
(LTC2850, LTC2852)
R
(LTC2850, LTC2852)
R
= 25°C. V
= 25°C. V
L
L
L
DIFF
DIFF
DIFF
DIFF
L
L
L
L
L
and t
= 15pF , V
= 15pF (Figure 6)
= 15pF (Figure 6)
= 500Ω, C
= 500Ω, C
= 500Ω, C
=1k, C
= 1k, C
= 54Ω, C
= 54Ω, C
= 54Ω, C
= 54Ω, C
The
The
F
< 4ns (Figure 6)
L
L
l
=15pF , DE = V
l
CC
CC
= 15pF , DE = 0V (Figure 7)
CM
L
L
L
denotes the specifi cations which apply over the full operating
denotes the specifi cations which apply over the full operating
= 3.3V unless otherwise noted. (Note 2)
L
L
L
L
= 3.3V, unless otherwise noted. (Note 2)
= 50pF , RE = 0V (Figure 5)
= 50pF , RE = V
= 50pF , (DE = ↓, RE = V
= 1.5V, |V
CC
CC
CC
= 100pF (Figure 4)
= 100pF (Figure 4)
= 100pF (Figure 4)
= 100pF (Figure 4)
,
, RE = V
, RE = 0V
Note 3: Maximum data rate is guaranteed by other measured parameters
and is not tested directly.
Note 4: 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 specifi ed maximum operating
junction temperature may result in device degradation or failure.
LTC2850/LTC2851/LTC2852
AB
CC
CC
| = 1.5V,
(Figure 7)
(LTC2850,
CC
(Figure 5)
CC
)
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
MIN
MIN
20
TYP
370
450
450
TYP
10
50
0
0
1
1
4
1
3
1000
1000
MAX
MAX
12.5
12.5
900
100
15
50
±6
70
70
50
5
6
8
6
8
285012fc
UNITS
UNITS
Mbps
5
μA
μA
μA
μA
μA
ns
ns
ns
ns
ns
μs
ns
ns
ns
ns
ns
μs