參數(shù)資料
型號: LTC1485IS8#TR
廠商: Linear Technology
文件頁數(shù): 8/12頁
文件大?。?/td> 0K
描述: IC TXRX BUS/LINE RS485 LP 8SOIC
標準包裝: 2,500
類型: 收發(fā)器
驅(qū)動器/接收器數(shù): 1/1
規(guī)程: RS422,RS485
電源電壓: 4.75 V ~ 5.25 V
安裝類型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 8-SOIC
包裝: 帶卷 (TR)
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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