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参数资料
型号： LTC1487CN8
厂商： Linear Technology
文件页数： 3/8页
文件大小： 0K
描述： IC TXRX RS485 LOW EMI LOPWR 8DIP
标准包装： 50
类型： 收发器
驱动器/接收器数： 1/1
规程： RS422，RS485
电源电压： 4.75 V ~ 5.25 V
安装类型： 通孔
封装/外壳： 8-DIP（0.300"，7.62mm）
供应商设备封装： 8-PDIP
包装： 管件
3
LTC1487
sn1487 1487fs
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
tPLH
Driver Input to Output
RDIFF = 54, CL1 = CL2 = 100pF,
q
150
1200
ns
tPHL
Driver Input to Output
q
150
1200
ns
tSKEW
Driver Output to Output
q
250
600
ns
tr, tf
Driver Rise or Fall Time
q
150
1200
ns
tZH
Driver Enable to Output High
CL = 100pF (Figures 4, 6), S2 Closed
q
100
1500
ns
tZL
Driver Enable to Output Low
CL = 100pF (Figures 4, 6), S1 Closed
q
100
1500
ns
tLZ
Driver Disable Time from Low
CL = 15pF (Figures 4, 6), S1 Closed
q
150
1500
ns
tHZ
Driver Disable Time from High
CL = 15pF (Figures 4, 6), S2 Closed
q
150
1500
ns
tPLH
Receiver Input to Output
RDIFF = 54, CL1 = CL2 = 100pF,
q
30
140
250
ns
tPHL
Receiver Input to Output
q
30
140
250
ns
tSKD
tPLH – tPHL Differential Receiver Skew
q
13
ns
tZL
Receiver Enable to Output Low
CRL = 15pF (Figures 2, 8), S1 Closed
q
20
50
ns
tZH
Receiver Enable to Output High
CRL = 15pF (Figures 2, 8), S2 Closed
q
20
50
ns
tLZ
Receiver Disable from Low
CRL = 15pF (Figures 2, 8), S1 Closed
q
20
50
ns
tHZ
Receiver Disable from High
CRL = 15pF (Figures 2, 8), S2 Closed
q
20
50
ns
fMAX
Maximum Data Rate
q
250
kbps
tSHDN
Time to Shutdown
DE = 0, RE =
q
50
200
600
ns
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VOD1
Differential Driver Output Voltage (Unloaded)
IO = 0
q
5V
VOD2
Differential Driver Output Voltage (with Load)
R = 50
(RS422)
q
2.0
V
R = 27
(RS485), Figure 1
q
1.5
5
V
VOC
Driver Common-Mode Output Voltage
R = 27
or R = 50, Figure 1
q
3V
VTH
Differential Input Threshold Voltage for Receiver
– 7V
≤ VCM ≤ 12V
q
– 0.2
0.2
V
VTH
Receiver Input Hysteresis
VCM = 0V
q
45
mV
ICC
Supply Current
No Load, Output Enabled
q
120
200
A
No Load, Output Disabled
q
80
120
A
ISHDN
Supply Current in Shutdown Mode
DE = 0V, RE = VCC
110
A
tPLH
Driver Input to Output
RDIFF = 54, CL1 = CL2 = 100pF,
q
150
1200
ns
tPHL
Driver Input to Output
q
150
1200
ns
tSKEW
Driver Output to Output
q
100
600
ns
tr, tf
Driver Rise or Fall Time
q
150
2000
ns
tPLH
Receiver Input to Output
RDIFF = 54, CL1 = CL2 = 100pF,
q
30
140
250
ns
tPHL
Receiver Input to Output
q
30
140
250
ns
tSKD
tPLH – tPHL Differential Receiver Skew
q
13
ns
fMAX
Maximum Data Rate
q
250
kbps
ELECTRICAL C
C
HARA TERISTICS –40°C ≤ T
A ≤ 85°C, VCC = 5V (Note 4) unless otherwise noted.
(Figures 3, 5)
(Figures 3, 7)
0
°C ≤ TA ≤ 70°C, VCC = 5V (Notes 2, 3) unless otherwise noted.
SWITCHI G CHARACTERISTICS
U
(Figures 3, 5)
(Figures 3, 7)
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