fMAX Maximum Data Rate " />
參數(shù)資料
型號(hào)： LTC2854IDD#TRPBF
廠商： Linear Technology
文件頁(yè)數(shù)： 11/16頁(yè)
文件大?。?/td> 0K
描述： IC TXRX RS485/RS422 10-DFN
標(biāo)準(zhǔn)包裝： 2,500
類型： 收發(fā)器
驅(qū)動(dòng)器/接收器數(shù)： 1/1
規(guī)程： RS422，RS485
電源電壓： 3 V ~ 3.6 V
安裝類型： 表面貼裝
封裝/外殼： 10-WFDFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 10-DFN（3x3）
包裝： 帶卷 (TR)
LTC2854/LTC2855
4
285455fb
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Driver
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)
●
412.5
ns
tZLD, tZHD, tLZD, tHZD Driver Enable or Disable Time
RL = 500Ω, CL = 50pF, RE = 0 (Figure 5)
●
70
ns
tZHSD, tZLSD
Driver Enable from Shutdown
RL = 500Ω, CL = 50pF, RE = VCC (Figure 5)
●
8μs
tSHDN
Time to Shutdown
RL = 500Ω, CL = 50pF
(DE = ↓, RE = VCC) or (DE = 0, RE ↑)
(Figure 5)
●
100
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 (Figure 7)
●
50
ns
tZHSR, tZLSR
Receiver Enable from Shutdown
RL = 1k, CL = 15pF, DE = 0V (Figure 7)
●
8μs
tRTEN, tRTZ
Termination Enable or Disable Time
VB = 0V, VAB = 2V, RE = VCC, DE = 0V
(Figure 8)
●
100
μs
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 specied.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
ICCT
Supply Current in Transmit Mode
No Load, DE = VCC, RE = VCC, TE = 0V
●
450
1000
μA
ICCTR
Supply Current with Both Driver and
Receiver Enabled
No Load, DE = VCC, RE = 0V, TE = 0V
●
450
1000
μA
ICCTERM
Supply Current in Termination Mode
DE = 0V, RE = VCC, TE = VCC
●
110
180
μA
ICCTERMR
Supply Current in Receive and
Termination Mode
DE = 0V, RE = 0V, TE = VCC
●
450
950
μA
ICCTERMT
Supply Current in Transmit and
Termination Mode
DE = VCC, RE = VCC, TE = VCC
●
470
1000
μA
ICCTERMTR
Supply Current with Driver, Receiver
and Termination Enabled
DE = VCC, RE = 0V, TE = VCC
●
470
1000
μA
ESD Protection
ESD Protection for RS485/RS422 Pins
A, B on LTC2854, Human Body Model
Y, Z, A, B on LTC2855, Human Body Model
±25
±15
kV
The ● denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C, VCC = 3.3V, TE = 0V unless otherwise noted (Note 2).
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 specied maximum operating
junction temperature may result in device degradation or failure.
The ● denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C, VCC = 3.3V, TE = 0V unless otherwise noted (Note 2).
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參數(shù)描述
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