参数资料
型号: LTC1484CN8
厂商: Linear Technology
文件页数: 10/16页
文件大小: 0K
描述: IC TXRX RS485 LOWPWR 8-DIP
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
LTC1484
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VTH
Receiver Input Hysteresis
VCM = 0V, DE = 0
q
±30
mV
VOH
Receiver Output High Voltage
IOUT = – 4mA, (VA – VB) = 200mV
q
3.5
V
VOL
Receiver Output Low Voltage
IOUT = 4mA, (VA – VB) = – 200mV
q
0.4
V
IOZR
Three-State (High Impedance) Output Current
VCC = Max, 0.4V ≤ VOUT ≤ 2.4V,
q
±1
A
at Receiver
DE = 0
RIN
Receiver Input Resistance
–7V
≤ VCM ≤ 12V
q
12
22
k
ICC
Supply Current
No Load, Output Enabled (DE = VCC)
q
600
900
A
No Load, Output Disabled (DE = 0)
q
400
700
A
ISHDN
Supply Current in Shutdown Mode
DE = 0, RE = VCC, DI = 0
q
120
A
IOSD1
Driver Short-Circuit Current, VOUT = High (Note 4)
– 7V
≤ VOUT ≤ 10V
35
250
mA
IOSD2
Driver Short-Circuit Current, VOUT = Low (Note 4)
– 7V
≤ VOUT ≤ 10V
35
250
mA
IOSR
Receiver Short-Circuit Current
0V
≤ VOUT ≤ VCC
q
785
mA
The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 5V ±5% (Notes 2 and 3) unless otherwise noted.
ELECTRICAL CHARACTERISTICS
SWITCHING CHARACTERISTICS
U
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
tPLH
Driver Input to Output
RDIFF = 54, CL1 = CL2 = 100pF
q
10
28.5
60
ns
(Figures 4, 6)
tPHL
Driver Input to Output
RDIFF = 54, CL1 = CL2 = 100pF
q
10
31
60
ns
(Figures 4, 6)
tSKEW
Driver Output to Output
RDIFF = 54, CL1 = CL2 = 100pF
q
2.5
10
ns
(Figures 4, 6)
tr, tf
Driver Rise or Fall Time
RDIFF = 54, CL1 = CL2 = 100pF
q
315
40
ns
(Figures 4, 6)
tZH
Driver Enable to Output High
CL = 100pF (Figures 5, 7) S2 Closed
q
40
70
ns
tZL
Driver Enable to Output Low
CL = 100pF (Figures 5, 7) S1 Closed
q
40
100
ns
tLZ
Driver Disable Time from Low
CL = 15pF (Figures 5, 7) S1 Closed
q
40
70
ns
tHZ
Driver Disable Time from High
CL = 15pF (Figures 5, 7) S2 Closed
q
40
70
ns
tPLH
Receiver Input to Output
RDIFF = 54, CL1 = CL2 = 100pF,
q
30
160
200
ns
(Figures 4, 8)
tPHL
Receiver Input to Output
RDIFF = 54, CL1 = CL2 = 100pF,
q
30
140
200
ns
(Figures 4, 8)
tSKD
|tPLH – tPHL| Differential Receiver Skew
RDIFF = 54, CL1 = CL2 = 100pF,
20
ns
(Figures 4, 8)
tZL
Receiver Enable to Output Low
CRL = 15pF (Figures 3, 9) S1 Closed
q
20
50
ns
tZH
Receiver Enable to Output High
CRL = 15pF (Figures 3, 9) S2 Closed
q
20
50
ns
tLZ
Receiver Disable from Low
CRL = 15pF (Figures 3, 9) S1 Closed
q
20
50
ns
tHZ
Receiver Disable from High
CRL = 15pF (Figures 3, 9) S2 Closed
q
20
50
ns
tDZR
Driver Enable to Receiver Valid
RDIFF = 54, CL1 = CL2 = 100pF
q
1600
3000
ns
(Figures 4, 10)
fMAX
Maximum Data Rate (Note 5)
q
4
5
Mbps
tSHDN
Time to Shutdown (Note 6)
DE = 0, RE
q
50
300
600
ns
The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C.
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