Switches

Some 1-wire devices have the ability to turn on/off a digital line.

  • The line is usually on-off conducting to ground
  • The current sink is limited
  • Voltage range is specified
  • The line is usually "tri-state"
    • Actual logical state can be tested
    • Actual state really only makes sense in "non-conducting" (off) state
  • The usual properties associated are:
    • sensed -- the actual logical state of the line (makes most sense in "non-conducting"
      • 0 -- GND voltage
      • 1 -- 5V (or so)
    • PIO -- the conducting setting
      • 0 -- off so non-conducting (to ground)
      • 1 -- on, so conducting to ground.
    • Latch -- the state "set"
      • 0 off intended
      • 1 on intended

 DeviceChannels
Voltage
Current
Threshold
PIO
Sensed
Latch
 DS2405
1
 6V 4mA2.2V
yes
yes
-
 DS2406
2
13V,6.5V50mA,8mA2.2V
yes
yes
yes
 DS2408 

8

 6V20mA (total)
 yes
yes
 DS2409
1
 10mA
 yes
yes
 
 DS2413
2
28V30mA * 2
0.8V
yes
yes
yes
 LCD
4
      
 DS24504 (share with voltage)
 5V
5uA
 yes
yes
 
 DS28EA002
 6V
20mA * 2
 yes
yes
yes
 DS28E04-1002
 6V
20mA (total)  yes
yes
yes
 DS2740
1
 6V
4mA
1.5V
yes
yes
 
 DS27511
12V
4mA
1.5V
yes
yes
 
 DS2756
1
12V
12mA
1.5V
yes
yes
 
 DS27611
12V
 4mA
1.5V
yes
yes
 
 DS2780  6V  4mA 1.5V yes
yes
 
 DS27811
 6V
20mA
1.5V
yes
yes
 

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