参数资料
型号: LTC2858HDD-1#PBF
厂商: Linear Technology
文件页数: 16/20页
文件大小: 0K
描述: IC TXRX RS485/RS422 10-DFN
标准包装: 121
类型: 收发器
驱动器/接收器数: 1/1
规程: RS422,RS485
电源电压: 4.5 V ~ 5.5 V
安装类型: 表面贴装
封装/外壳: 10-WFDFN 裸露焊盘
供应商设备封装: 10-DFN(3x3)
包装: 管件
LTC2856-1/LTC2856-2
LTC2857-1/LTC2857-2
LTC2858-1/LTC2858-2
5
285678ff
For more information www.linear.com/LTC2856-1
swiTching characTerisTics The
l
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
l
630
1000
A
LTC2856-2
LTC2858-2
l
670
1100
A
ICCTR
Supply Current with Both Driver and Receiver
Enabled
No Load, DE = VCC,
RE = 0V
LTC2856-1
LTC2857-1
LTC2858-1
l
660
1100
A
LTC2856-2
LTC2857-2
LTC2858-2
l
700
1200
A
Driver in LTC2856-1, LTC2857-1, LTC2858-1
fMAX
Maximum Data Rate
(Note 3)
l
20
Mbps
tPLHD, tPHLD
Driver Input to Output
RDIFF = 54Ω, CL = 100pF (Figure 4)
l
10
50
ns
ΔtPD
Driver Input to Output Difference |tPLHD – tPHLD| RDIFF = 54Ω, CL = 100pF (Figure 4)
l
1
6
ns
tSKEWD
Driver Output Y to Output Z
RDIFF = 54Ω, CL = 100pF (Figure 4)
l
1
±6
ns
tRD, tFD
Driver Rise or Fall Time
RDIFF = 54Ω, CL = 100pF (Figure 4)
l
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)
l
70
ns
tZHSD, tZLSD
Driver Enable from Shutdown
RL = 500Ω, CL = 50pF, RE = VCC,
LTC2856-1, LTC2858-1 (Figure 5)
l
8
s
tSHDN
Time to Shutdown
(DE =
↓, RE = VCC) or (DE = 0V, RE = ↑),
LTC2856-1, LTC2858-1 (Figure 5)
l
100
ns
Driver in LTC2856-2, LTC2857-2, LTC2858-2
fMAXS
Maximum Data Rate
(Note 3)
l
250
kbps
tPLHDS, tPHLDS Driver Input to Output
RDIFF = 54Ω, CL = 100pF (Figure 4)
l
0.95
1.5
s
ΔtPDS
Driver Input to Output Difference |tPLHD – tPHLD| RDIFF = 54Ω, CL = 100pF (Figure 4)
l
50
500
ns
tSKEWDS
Driver Output A to Output B
RDIFF = 54Ω, CL = 100pF (Figure 4)
l
200
±500
ns
tRDS, tFDS
Driver Rise or Fall Time
RDIFF = 54Ω, CL = 100pF (Figure 4)
l
0.90
1.5
s
tZHDS, tZLDS
Driver Enable Time
RL = 500Ω, CL = 50pF, RE = 0V,
LTC2856-2, LTC2858-2 (Figure 5)
l
300
ns
tLZDS, tHZDS
Driver Disable Time
RL = 500Ω, CL = 50pF, RE = 0V,
LTC2856-2, LTC2858-2 (Figure 5)
l
70
ns
tZHSDS, tZLSDS Driver Enable from Shutdown
RL = 500Ω, CL 50pF, RE = VCC,
LTC2856-2, LTC2858-2 (Figure 5)
l
8
s
tSHDNS
Time to Shutdown
(DE = 0V, RE
↑) or (DE = ↓, RE = VCC),
LTC2856-2, LTC2858-2 (Figure 5)
l
500
ns
Receiver
tPLHR, tPHLR
Receiver Input to Output
CL = 15pF, VCM = 1.5V, |VAB| = 1.5V,
tR and tF < 4ns (Figure 6)
l
50
70
ns
tSKEWR
Differential Receiver Skew, |tPLHR – tPHLR|
CL = 15pF (Figure 6)
l
1
6
ns
tRR, tFR
Receiver Output Rise or Fall Time
CL = 15pF (Figure 6)
l
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)
l
50
ns
tZHSR, tZLSR
Receiver Enable from Shutdown
RL = 1k, CL = 15pF, DE = 0V,
LTC2856-1, LTC2856-2, LTC2858-1,
LTC2858-2 (Figure 7)
l
8
s
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