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demultiplexer with memory register

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bremenpl

bremenpl

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Hello there,
I was looking, but couldnt find such device... I need a demultiplexer with 16 outputs, 4 adresses line that has a register on the output that remembers the old state. In a regular demultiplexer as soon as output changes other outputs goes high. Does such thing exist?
 

Hi,

a schematic could clarify the function. Especially the "remember" function. Remember what and how long? during power down?

Is it pure digital or do you need an analog demultiplexer?

* Either use a 4 bit DFF and a 4 to 16 DEMUX (digital or analog)
* or use a cheap CPLD (pure digital)
* or use any microcontroller (pure digital)

supply voltage, speed, input signal...

Klaus
 

Without any unnecessary details- A regular demultiplexer can only have one output set, the rest of the outputs at that time are pulled high (for example). What I am asking for, is there a demultiplexer, where the outputs dont go high, but keep their state for the time before I amnually update it.

For example, there is a 16 bit output demultiplexer. I choose address 0 and place value low, that means output 0 gets low and the bits from 1 to 15 remains high. Now I change address to 1 and insert low value. Output 1 gets low but the output 0 doesnt keep its 0 value, but turn high. This is for a regular demultiplexer. I need a device that will keep the set values.
 

Seems to refer to a 1:16 demux plus 16 RS-latches. Surely not available as a standard IC. You need to define a reset condition, by the way.
 
I see. Thank you for help.
 

Hi,

ADG526 is a 1:16 DEMUX with latch.

Klaus
 

Hi , you could check Fiberstore to see if they have the one you need. And they could provide customized service according to your requirements.
 

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