Datasheet

LTC2856-1/LTC2856-2
LTC2857-1/LTC2857-2
LTC2858-1/LTC2858-2
5
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The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V unless otherwise noted. (Note 2)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
CCT
Supply Current in Transmit Mode No Load, DE = V
CC
,
RE = V
CC
LTC2856-1
LTC2858-1
l
630 1000 µA
LTC2856-2
LTC2858-2
l
670 1100 µA
I
CCTR
Supply Current with Both Driver and Receiver
Enabled
No Load, DE = V
CC
,
RE = 0V
LTC2856-1
LTC2857-1
LTC2858-1
l
660 1100 µA
LTC2856-2
LTC2857-2
LTC2858-2
l
700 1200 µA
Driver in LTC2856-1, LTC2857-1, LTC2858-1
f
MAX
Maximum Data Rate (Note 3)
l
20 Mbps
t
PLHD
, t
PHLD
Driver Input to Output
R
DIFF
= 54Ω, C
L
= 100pF (Figure 4)
l
10 50 ns
Δt
PD
Driver Input to Output Difference |t
PLHD
– t
PHLD
|
R
DIFF
= 54Ω, C
L
= 100pF (Figure 4)
l
1 6 ns
t
SKEWD
Driver Output Y to Output Z
R
DIFF
= 54Ω, C
L
= 100pF (Figure 4)
l
1 ±6 ns
t
RD
, t
FD
Driver Rise or Fall Time
R
DIFF
= 54Ω, C
L
= 100pF (Figure 4)
l
4 12.5 ns
t
ZLD
, t
ZHD
,
t
LZD
, t
HZD
Driver Enable or Disable Time
R
L
= 500Ω, C
L
= 50pF, RE = 0V,
LTC2856-1, LTC2858-1 (Figure 5)
l
70 ns
t
ZHSD
, t
ZLSD
Driver Enable from Shutdown
R
L
= 500Ω, C
L
= 50pF, RE = V
CC
,
LTC2856-1, LTC2858-1 (Figure 5)
l
8 µs
t
SHDN
Time to Shutdown
(DE = ↓, RE = V
CC
) or (DE = 0V, RE = ↑),
LTC2856-1, LTC2858-1 (Figure 5)
l
100 ns
Driver in LTC2856-2, LTC2857-2, LTC2858-2
f
MAXS
Maximum Data Rate (Note 3)
l
250 kbps
t
PLHDS
, t
PHLDS
Driver Input to Output
R
DIFF
= 54Ω, C
L
= 100pF (Figure 4)
l
0.95 1.5 µs
Δt
PDS
Driver Input to Output Difference |t
PLHD
– t
PHLD
|
R
DIFF
= 54Ω, C
L
= 100pF (Figure 4)
l
50 500 ns
t
SKEWDS
Driver Output A to Output B
R
DIFF
= 54Ω, C
L
= 100pF (Figure 4)
l
200 ±500 ns
t
RDS
, t
FDS
Driver Rise or Fall Time
R
DIFF
= 54Ω, C
L
= 100pF (Figure 4)
l
0.90 1.5 µs
t
ZHDS
, t
ZLDS
Driver Enable Time
R
L
= 500Ω, C
L
= 50pF, RE = 0V,
LTC2856-2, LTC2858-2 (Figure 5)
l
300 ns
t
LZDS
, t
HZDS
Driver Disable Time
R
L
= 500Ω, C
L
= 50pF, RE = 0V,
LTC2856-2, LTC2858-2 (Figure 5)
l
70 ns
t
ZHSDS
, t
ZLSDS
Driver Enable from Shutdown
R
L
= 500Ω, C
L
50pF, RE = V
CC
,
LTC2856-2, LTC2858-2 (Figure 5)
l
8 µs
t
SHDNS
Time to Shutdown
(DE = 0V, RE↑) or (DE = ↓, RE = V
CC
),
LTC2856-2, LTC2858-2 (Figure 5)
l
500 ns
Receiver
t
PLHR
, t
PHLR
Receiver Input to Output C
L
= 15pF, V
CM
= 1.5V, |V
AB
| = 1.5V,
t
R
and t
F
< 4ns (Figure 6)
l
50 70 ns
t
SKEWR
Differential Receiver Skew, |t
PLHR
– t
PHLR
| C
L
= 15pF (Figure 6)
l
1 6 ns
t
RR
, t
FR
Receiver Output Rise or Fall Time C
L
= 15pF (Figure 6)
l
3 12.5 ns
t
ZLR
, t
ZHR
,
t
LZR
, t
HZR
Receiver Enable/Disable R
L
= 1k, C
L
= 15pF, DE = V
CC
,
LTC2856-1, LTC2856-2, LTC2858-1,
LTC2858-2 (Figure 7)
l
50 ns
t
ZHSR
, t
ZLSR
Receiver Enable from Shutdown R
L
= 1k, C
L
= 15pF, DE = 0V,
LTC2856-1, LTC2856-2, LTC2858-1,
LTC2858-2 (Figure 7)
l
8 µs