參數(shù)資料
型號: LT1785ACN8
廠商: Linear Technology
文件頁數(shù): 15/16頁
文件大?。?/td> 0K
描述: IC TXRX 60V RS485/RS422 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: RS422,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
LT1785/LT1785A/
LT1791/LT1791A
8
178591fc
TEST CIRCUITS
Figure 1. Driver DC Test Load
Figure 2. Receiver Timing Test Load
Figure 3. Driver/Receiver Timing Test Circuit
Figure 4. Driver Timing Test Load
VOD
A
B
R
VOC
1785/91 F01
RECEIVER
OUTPUT
CRL
1k
S1
S2
TEST POINT
VCC
1k
1785/91 F02
5V
DE
A
B
DI
RDIFF
CL1
CL2
RO
15pF
A
B
RE
1785/91 F03
OUTPUT
UNDER TEST
CL
S1
S2
VCC
500Ω
1785/91 F04
LT1785 Transmitting
INPUTS
OUTPUTS
RE
DE
DI
A
B
RO
01
0
1
0
01
1
0
1
0
X
Hi-Z
1
0
1
Hi-Z
1
0
Hi-Z
LT1785 Receiving
INPUTS
OUTPUT
RE
DE
DI
A-B
RO
0
X
≤ –200mV
0
X
≥ 200mV*
1
0
X
Open
1
0
X
Hi-Z
* ≥ 0mV for LT1785A
LT1791
INPUTS
OUTPUTS
RE
DE
DI
A-B
Y
Z
RO
0
X
≤ –200mV
Hi-Z
0
X
≥ 200mV*
Hi-Z
1
0
X
Open
Hi-Z
1
0
1
0
≤ –200mV
0
1
0
1
0
≥ 200mV*
0
1
0
1
0
Open
0
1
0
1
≤ –200mV
1
0
1
≥ 200mV*
1
0
1
0
1
Open
1
0
1
0
X
Hi-Z
1
0
X
0
1
Hi-Z
1
X
1
0
Hi-Z
* ≥ 0mV for LT1791A
FUNCTION TABLES
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