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LTC2856IMS8-1 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC2856IMS8-1
Description  20Mbps and Slew Rate Limited 15kV RS485/RS422 Transceivers
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC2856IMS8-1 Datasheet(HTML) 5 Page - Linear Technology

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LTC2856-1/LTC2856-2
LTC2857-1/LTC2857-2
LTC2858-1/LTC2858-2
5
285678fe
SWITCHING CHARACTERISTICS The denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 5V unless otherwise noted. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
ICCT
Supply Current in Transmit Mode
No Load, DE = VCC,
RE = VCC
LTC2856-1
LTC2858-1
630
1000
μA
LTC2856-2
LTC2858-2
670
1100
μA
ICCTR
Supply Current with Both Driver and Receiver
Enabled
No Load, DE = VCC,
RE = 0V
LTC2856-1
LTC2857-1
LTC2858-1
660
1100
μA
LTC2856-2
LTC2857-2
LTC2858-2
700
1200
μA
Driver in LTC2856-1, LTC2857-1, LTC2858-1
fMAX
Maximum Data Rate
(Note 3)
20
Mbps
tPLHD, tPHLD
Driver Input to Output
RDIFF = 54Ω, CL = 100pF (Figure 4)
10
50
ns
ΔtPD
Driver Input to Output Difference |tPLHD – tPHLD|RDIFF = 54Ω, CL = 100pF (Figure 4)
16
ns
tSKEWD
Driver Output Y to Output Z
RDIFF = 54Ω, CL = 100pF (Figure 4)
1±6
ns
tRD, tFD
Driver Rise or Fall Time
RDIFF = 54Ω, CL = 100pF (Figure 4)
4
12.5
ns
tZLD, tZHD,
tLZD, tHZD
Driver Enable or Disable Time
RL = 500Ω, CL = 50pF, RE = 0V,
LTC2856-1, LTC2858-1 (Figure 5)
70
ns
tZHSD, tZLSD
Driver Enable from Shutdown
RL = 500Ω, CL = 50pF, RE = VCC,
LTC2856-1, LTC2858-1 (Figure 5)
8μs
tSHDN
Time to Shutdown
(DE =
↓, RE = VCC) or (DE = 0V, RE = ↑),
LTC2856-1, LTC2858-1 (Figure 5)
100
ns
Driver in LTC2856-2, LTC2857-2, LTC2858-2
fMAXS
Maximum Data Rate
(Note 3)
250
kbps
tPLHDS, tPHLDS Driver Input to Output
RDIFF = 54Ω, CL = 100pF (Figure 4)
0.95
1.5
μs
ΔtPDS
Driver Input to Output Difference |tPLHD – tPHLD|RDIFF = 54Ω, CL = 100pF (Figure 4)
50
500
ns
tSKEWDS
Driver Output A to Output B
RDIFF = 54Ω, CL = 100pF (Figure 4)
200
±500
ns
tRDS, tFDS
Driver Rise or Fall Time
RDIFF = 54Ω, CL = 100pF (Figure 4)
0.90
1.5
μs
tZHDS, tZLDS
Driver Enable Time
RL = 500Ω, CL = 50pF, RE = 0V,
LTC2856-2, LTC2858-2 (Figure 5)
300
ns
tLZDS, tHZDS
Driver Disable Time
RL = 500Ω, CL = 50pF, RE = 0V,
LTC2856-2, LTC2858-2 (Figure 5)
70
ns
tZHSDS, tZLSDS Driver Enable from Shutdown
RL = 500Ω, CL 50pF, RE = VCC,
LTC2856-2, LTC2858-2 (Figure 5)
8μs
tSHDNS
Time to Shutdown
(DE = 0V, RE
↑) or (DE = ↓, RE = VCC),
LTC2856-2, LTC2858-2 (Figure 5)
500
ns
Receiver
tPLHR, tPHLR
Receiver Input to Output
CL = 15pF, VCM = 1.5V, |VAB| = 1.5V,
tR and tF < 4ns (Figure 6)
50
70
ns
tSKEWR
Differential Receiver Skew, |tPLHR – tPHLR|CL = 15pF (Figure 6)
16
ns
tRR, tFR
Receiver Output Rise or Fall Time
CL = 15pF (Figure 6)
3
12.5
ns
tZLR, tZHR,
tLZR, tHZR
Receiver Enable/Disable
RL = 1k, CL = 15pF, DE = VCC,
LTC2856-1, LTC2856-2, LTC2858-1,
LTC2858-2 (Figure 7)
50
ns
tZHSR, tZLSR
Receiver Enable from Shutdown
RL = 1k, CL = 15pF, DE = 0V,
LTC2856-1, LTC2856-2, LTC2858-1,
LTC2858-2 (Figure 7)
8μs


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