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参数资料
| 型号： | PS395ENG |
| 厂商： | PERICOM SEMICONDUCTOR CORP |
| 元件分类： | 多路复用及模拟开关 |
| 英文描述： | OCTAL 1-CHANNEL, SGL POLE SGL THROW SWITCH, PDIP24 |
| 封装： | PLASTIC, DIP-24 |
| 文件页数： | 2/13页 |
| 文件大小： | 410K |
| 代理商： | PS395ENG |
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PS8462
02/22/00
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PS395
Precision8-Ch.17V,SPSTSwitch
w/8-BitSerialDecodedControl
Detailed Description
Basic Operation
The PS395s interface can be thought of as an 8-bit shift register
controlled by CS (Figure 7). While CS is low, input data appearing
at DIN is clocked into the shift register synchronously with SCLKs
rising edge. The data is an 8-bit word, each bit controlling one of
eight switches in the PS395. DOUT is the shift registers output,
with data appearing synchronously with SCLKs falling edge. Data
at DOUT is simply the input data delayed by eight clock cycles.
When shifting the input data, D7 is the first bit in and out of the
shift register. While shifting data, the switches remain in their pre-
vious configuration. When the eight bits of data have been shifted
in, CS is driven high. This updates the new switch configuration
and inhibits further data from entering the shift register. Transi-
tions at DIN and SCLK have no effect when CS is high, and DOUT
holds the first input bit (D7) at its output.
More or less than eight clock cycles can be entered during the CS
low period. When this happens, the shift register will contain only
the last eight serial data bits, regardless of when they were en-
tered. On the rising edge of CS, all the switches will be set to the
corresponding states.
The PS395s three-wire serial interface is compatible with SPI,
QSPI, and Microwire standards. If inter-facing with a Motorola
processor serial interface, set CPOL = 0. The PS395 is considered a
slave device (Figures 2 and 7). Upon power-up, the shift register
contains all zeros, and all switches are off.
The latch that drives the analog switch is updated on the rising
edge of CS, regardless of SCLKs state. This meets all the SPI and
QSPI requirements.
Daisy Chaining
For a simple interface using several PS395s, daisy chain the shift
registers as shown in Figure 5. The CS pins of all devices are
connected together, and a stream of data is shifted through the
PS395s in series. When CS is brought high, all switches are up-
dated simultaneously. Additional shift registers may be included
anywhere in series with the PS395 data chain.
tCSH0
SCLK
DIN
DOUT
COM OUT
tCSS
tCL
tDS
tDH
tDO
tCSH1
tOFF
tCSH2
tCLL
tCH
Figure 1. Timing Diagram
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PS395EWG | 制造商:未知厂家 制造商全称:未知厂家 功能描述:ANALOG SWITCH|OCTAL|SPST|CMOS|SOP|24PIN|PLASTIC |
| PS396 | 制造商:PERICOM 制造商全称:Pericom Semiconductor Corporation 功能描述:Precision, 16-Channel 17V Analog Multiplexer |
| PS396CAI | 制造商:PERICOM 制造商全称:Pericom Semiconductor Corporation 功能描述:Precision, 16-Channel 17V Analog Multiplexer |
| PS396CAIE | 功能描述:多路器开关 IC Precision 16Ch Dual 8Ch 17V RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
| PS396CAIEX | 功能描述:多路器开关 IC Precision 16Ch Dual 8Ch 17V RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
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