Binary decoder with output latches

Thread Starter

AndyC

Joined Mar 18, 2018
2
HI All,
I’m new to the forum, but not general electronics design.
I’m looking for a chip, similar to the ADG707 but only needs to be digital.
However the main difference is I’m looking for a chip that will latch the output line until set until into another state. So something like this

Set input high
Set binary address, say output 6
Enable chip
output 6 goes high
enable goes Low Output 6 is still high
set bin address to another , say O5
enable
Output 5 is high
enable low. Output 5 and 6 high.
Set input low
Binary address 6
enable, out 6 goes low
enable off, output 5 is high, 6 is now low.

and so on. Any ideas ?
Andy
 

sghioto

Joined Dec 31, 2017
2,416
I don't think there's a single chip that can do all that except a microprocessor. I can see that done with several TTL or CMOS chips.
SG
 

128ITSH

Joined Jul 20, 2017
101
You should look into an addressable latch like the CD4099 or 74HC259.
They both work by decoding a 3-bit address to select one of 8 lines and with write enable/disable this bit is latched with value from the data input.
 
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