- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄375317 > AN460 (NXP Semiconductors N.V.) Using the P82B96 for bus interface PDF資料下載
參數(shù)資料
| 型號(hào)： | AN460 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Using the P82B96 for bus interface |
| 中文描述： | 使用總線接口P82B96 |
| 文件頁(yè)數(shù)： | 3/8頁(yè) |
| 文件大?。?/td> | 66K |
| 代理商： | AN460 |
Philips Semiconductors
Application note
AN460
Using the P82B96 for bus interface
2001 Feb 14
3
GALVANIC BUS ISOLATION
In Figure 4 the Tx and Rx signals are shown interfaced via
opto-couplers to provide galvanic separation.
This simple circuit can use general purpose 4N36 opto-couplers
having published switching times around 50
μ
s for the load
impedances shown. That will limit the design bus clock speed to
around 5kHz. Simple circuits like this can probably reach 20kHz by
changing the type of opto-coupler or the circuit values.
Low speed applications can include: Driving remote displays,
security systems, access control systems, data logging, remote
control of appliances or lighting. Isolation can simply be included in
I
2
C systems at any point on the bus where safety isolation or ground
potential differences require it.
Figure 5 shows how faster opto-couplers can be applied to achieve
full 100kHz clock speed.
+5 V
1/2 P82B96
SU01022
I
2
C
SDA
R1
Tx
(SDA)
Rx
(SDA)
R2
R3
+V
CC
+V
CC1
R4
R5
I2C
SDA
This example shows the simplicity of a low speed application.
For example:
R1 = usual I
2
C pull–up
R3 = 680
R5 = 2.2 K
V
CC1
= 5 V
R2 = 10 K
R4 = 2.2 K
V
CC
= 5 V
Figure 4.
Galvanic isolation of I
2
C nodes via opto-couplers
+5 V
1/2 P82B96
SU01015
I
2
C
SDA
USUAL I
2
C
PULL-UP
Rx
(SDA)
Tx
(SDA)
2K2
560
560
USUAL I
2
C
PULL-UP
*0.1 F
5
3
2
8
7
6
2N2907
I
2
C
SDA
+5 V
*0.1 F
6N137
x 2
*
NOTE
: 6N137 data recommends 0.1 F mounted between pins 5 and 8
Figure 5.
Opto-isolation of I
2
C nodes via 6N137 for 100 kHz operation
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AN48800A | Circular Connector; No. of Contacts:26; Series:MS27656; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:17; Circular Contact Gender:Pin; Circular Shell Style:Wall Mount Receptacle; Insert Arrangement:17-26 RoHS Compliant: No |
| AN48810B | Low current consumption, high sensitivity CMOS Hall IC One-way magnetic field operation |
| AN504 | Video Crosspoint Switch Simplifies Large Matrix Designs |
| AN5071 | TV Tuner Band-Switch IC 31V-Voltage Regulator Built-in |
| AN5095 | Single chip IC with I2C bus interface for PAL/NTSC color TV system |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AN46-13 | 制造商:AN# - MILITARY 功能描述: |
| AN463 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:60HC05K0 Infra-red Remote Control |
| AN-467 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Taking Advantage of ECL Minimum-Skew Clock Drivers |
| AN-468 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Taking Advantage of ECL Minimum-Skew Clock Drivers |
| AN-469 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Taking Advantage of ECL Minimum-Skew Clock Drivers |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。