For more information www.linear.com/LTC485 SWITCHING TIME WAVEFORMS Figure 6. Driver Ena" />
參數(shù)資料
型號: LTC485IN8
廠商: Linear Technology
文件頁數(shù): 12/14頁
文件大?。?/td> 0K
描述: IC TXRX INTERFACE RS485 LP 8DIP
標準包裝: 50
類型: 收發(fā)器
驅(qū)動器/接收器數(shù): 1/1
規(guī)程: RS485
電源電壓: 4.75 V ~ 5.25 V
安裝類型: 通孔
封裝/外殼: 8-DIP(0.300",7.62mm)
供應商設(shè)備封裝: 8-PDIP
包裝: 管件
LTC485
7
485fk
For more information www.linear.com/LTC485
SWITCHING TIME WAVEFORMS
Figure 6. Driver Enable and Disable Times
1.5V
tZL
2.3V
tZH
1.5V
tLZ
0.5V
tHZ
f = 1MHz, tr ≤ 10ns, tf ≤ 10ns
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
3V
0V
DI
5V
VOL
VOH
0V
A, B
485 F06
Figure 7. Receiver Propagation Delays
1.5V
tPHL
f = 1MHz, tr ≤ 10ns, tf ≤ 10ns
R
–VOD2
A, B
0V
1.5V
tPLH
OUTPUT
INPUT
VOD2
VOL
VOH
485 F07
Figure 8. Receiver Enable and Disable Times
1.5V
tZL
1.5V
tZH
1.5V
tLZ
0.5V
tHZ
f = 1MHz, tr ≤ 10ns, tf ≤ 10ns
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
3V
0V
RE
5V
0V
R
485 F08
FUNCTION TABLES
LTC485 Transmitting
INPUTS
LINE
CONDITION
OUTPUTS
RE
DE
DI
B
A
X
1
No Fault
0
1
X
1
0
No Fault
1
0
X
0
X
Z
X
1
X
Fault
Z
LTC485 Receiving
INPUTS
OUTPUTS
RE
DE
A – B
R
0
≥ 0.2V
1
0
≤ –0.2V
0
Inputs Open
1
0
X
Z
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