- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄362814 > ISO485P Isolated RS-485 DIFFERENTIAL BUS TRANSCEIVER PDF資料下載
參數(shù)資料
| 型號(hào)： | ISO485P |
| 英文描述： | Isolated RS-485 DIFFERENTIAL BUS TRANSCEIVER |
| 中文描述： | 隔離型RS - 485差分總線收發(fā)器 |
| 文件頁(yè)數(shù)： | 11/11頁(yè) |
| 文件大?。?/td> | 177K |
| 代理商： | ISO485P |
11
ISO485
a) R
= R
and R
= R
For open circuit conditions this biases the line to a logic '1'
b) Z
1
= Z
3
= Z
5
=Z
7
= BZX85 = 12V
Z
2
= Z
4
= Z
=Z
8
= BZX85 = 6.8V
D
=D
= IN4048
The zener diode in conjunction with the ptc thermistors limit the current
drawn on the line when taken beyond the +12V and –7V. The ptc
thermistors also current limit on the line being shorted to the ground.
c)
FIGURE 8. RS-485 Line with Fail-Safe Protection.
R
1
=
R
2
=
0.5
×
Z
0
1
+
V
CC
V
TH
R
T
=
Z
0
1
+
V
TH
V
CC
NOTE: PTC = Positive Temperature Coefficient Thermistor.
B
B
A
A
R
2
R
4
R
T
R
T
R
1
D
1
D
2
R
3
+12
+12
Z
1
Z
3
Z
2
Z
4
Z
6
Z
8
Z
5
Z
7
PTC
PTC
PTC
PTC
FIGURE 7. NRZ Psuedo-Noise Generator.
+V
CC
QA
QB
QC
QD
QE
QF
QG
QH
A
B
CLK
CLR
3
4
5
6
1
2
10
11
12
13
8
9
U2
QA
QB
QC
QD
QE
QF
QG
QH
A
B
CLK
CLR
3
4
5
6
4
5
1
2
3
6
10
11
12
13
10
2
1
10
13
3
11
12
1
2
8
9
9
5
4
6
8
9
U1
O/P
74ACT 164
74ACT 86
74ACT 74
74ACT 74
74ACT 86
74ACT 86
74ACT 164
8
U3C
UA4
U4B
U3B
U3A
D
CLK
Q
Q
D
CLK
Q
Q
CLK I/P
CL
5V
PR
PR
CL
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISO518P-U | CAT 5 SOLID PVC CABLE STRGHT PIN, 100 MHZ-BLUE |
| ISO518 | Bidirectional ISOLATED DIGITAL COUPLERS |
| ISO518P | Bidirectional ISOLATED DIGITAL COUPLERS |
| ISOLATED | (112.32 k) |
| BI-DIRECTIONALDIGITALCOUPLER | (112.32 k) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISO4X250H1 | 制造商:HELLERMANNTYTON 功能描述:ISOLATOR MOUNT FOR 1/4" TUBING 制造商:HellermannTyton 功能描述: 制造商:HellermannTyton 功能描述:Cable Accessories Isolator Mount Thermoplastic Black Bag |
| ISO5 | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:ASIC |
| ISO508 | 制造商:BB 制造商全稱(chēng):BB 功能描述:Uni-Directional ISOLATED DIGITAL COUPLERS |
| ISO508P | 制造商:BB 制造商全稱(chēng):BB 功能描述:Uni-Directional ISOLATED DIGITAL COUPLERS |
| ISO508P-U | 制造商:Rochester Electronics LLC 功能描述:ISOLATED DIGITAL COUPLER - Bulk 制造商:Texas Instruments 功能描述: |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。