- 您现在的位置：买卖IC网 > PDF目录381709 > DG894 (Vishay Intertechnology,Inc.) Component Video Selector(用于视频信号转换的视频选择器) PDF资料下载
参数资料
| 型号： | DG894 |
| 厂商： | Vishay Intertechnology,Inc. |
| 英文描述： | Component Video Selector(用于视频信号转换的视频选择器) |
| 中文描述： | 分量视频选择（用于视频信号转换的视频选择器） |
| 文件页数： | 9/10页 |
| 文件大小： | 134K |
| 代理商： | DG894 |
DG894
Vishay Siliconix
Document Number: 70072
S-52433—Rev. D, 06-Sep-99
www.siliconix.com FaxBack 408-970-5600
5-9
SDA
SCL
STA
STO
SDA
SCL
Start Condition
Stop Condition
FIGURE 8.
START and STOP Conditions
1
2
7
8
9
1
2
3-8
9
STA
Start Condition
STO
Stop
Condition
ACK
ACK
MSB
SDA
SCL
acknowledgement
signal from receiver
acknowledgement
signal from receiver
FIGURE 9.
Data Transfer on the I
2
C Bus
clock line held low while interrupts are serviced
byte complete, interrupt within receiver
Timing Specifications of the I C Bus
I C bus load conditions for timing specifications are as follows:
4 k pull-up resistors to +5 V; 200 pF capacitor to
ground. All values are referred to V
IH
= 3 V, V
IL
= 1.5 V.
Parameter
Symbol
Min
Max
Unit
SCL Clock Frequency
f
scl
–
100
kHz
Bus Free Before Start
t
BUF
4.7
–
Start Condition Set-up Time
t
SU;STA
4.7
–
Start Condition Hold Time
t
HD;STA
4
–
SCL and SDA Low Period
t
LOW
4.7
–
SCL and SDA High Period
t
HIGH
4
–
s
SCL and SDA Rise Time
t
r
–
1.0
SCL and SDA Fall Time
t
f
–
0.3
Data Set-Up Time (WRITE)
t
SU;DAT
0.25
–
Data Hold Time (WRITE)
t
HD;DAT
0*
–
*A transmitter must internally provide at lease a hold time to bridge the
undefined region (max 300 ns) of the falling edge of the SCL.
I C Bus Protocol
The DG894 is a slave receiver type of I C interface and has
four allocated addresses, two of which are user programmable
through the SEL pin. Additional addresses may be obtained by
a metal mask option for users requiring more than two DG894s
on the same I C bus. Contact Vishay Siliconix marketing for
further information.
After the correct address has been sent, only one data byte is
needed to define the switch configuration. Subsequent data
put onto the bus will update the switches until a STOP
condition (or another START condition) signals that the device
is no longer being addressed. The switches will then remain in
their last configuration as long as power is maintained to the
chip.
Power on Reset
A power on reset function is provided on the DG894 to turn all
switches off following power up if the I C mode is selected. In
the CMOS control mode, the switches are selected according
to the state of the control inputs.
相关PDF资料 |
PDF描述 |
|---|---|
| DG894 | Component Video Selector |
| DG9051 | Precision 8-Ch/Dual 4-Ch/Triple 2-Ch Low Voltage Analog Switches/Multiplexers |
| DG9051DQ-T1-E3 | Precision 8-Ch/Dual 4-Ch/Triple 2-Ch Low Voltage Analog Switches/Multiplexers |
| DG9052 | Precision 8-Ch/Dual 4-Ch/Triple 2-Ch Low Voltage Analog Switches/Multiplexers |
| DG9052DQ-T1-E3 | Precision 8-Ch/Dual 4-Ch/Triple 2-Ch Low Voltage Analog Switches/Multiplexers |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DG894DJ | 制造商:VISHAY 制造商全称:Vishay Siliconix 功能描述:Component Video Selector |
| DG894DW | 制造商:VISHAY 制造商全称:Vishay Siliconix 功能描述:Component Video Selector |
| DG9004X01XX-D4X WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| DG9006X01XX-D4X WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| DG9010X01XX_D4X WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
发布紧急采购，3分钟左右您将得到回复。