参数资料
型号: LTC1485IS8
厂商: Linear Technology
文件页数: 8/12页
文件大小: 0K
描述: IC TXRX DIFFERNTIAL BUS 8-SOIC
标准包装: 100
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: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOIC
包装: 管件
5
LTC1485
PI FU CTIO S
U
UU
RO (Pin 1): Receiver Output. If the receiver output is
enabled (RE low), then if A > B by 200mV, RO will be high.
If A < B by 200mV, then RO will be low.
RE (Pin 2): Receiver Output Enable. A low enables the
receiver output, RO. A high input forces the receiver
output into a high impedance state.
DE (Pin 3): Driver Output Enable. A high on DE enables the
driver outputs, A and B. A low input will force the driver
outputs into a high impedance state.
DI (Pin 4): Driver Input. If the driver outputs are enabled
(DE high), then a low on DI forces the driver outputs A low
and B high. A high on DI will force A high and B low.
GND (Pin 5): Ground Connection.
A (Pin 6): Driver Output/Receiver Input.
B (Pin 7): Driver Output/Receiver Input.
VCC (Pin 8): Positive Supply. 4.75V ≤ VCC ≤ 5.25V.
TEST CIRCUITS
Figure 3. Receiver Timing Test Load
1k
1485 F03
CL
S1
S2
1k
VCC
RECEIVER
OUTPUT
Figure 4. Driver Timing Test Load
1485 F04
CL
S1
S2
500
VCC
OUTPUT
UNDER TEST
VOD2
A
B
R
VOC
1485 F01
DI
RDIFF
1485 F02
DRIVER
RECEIVER
CL1
CL2
RO
15pF
A
B
A
B
Figure 1. Driver DC Test Load
Figure 2. Driver/Receiver Timing Test Circuit
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