Datasheet
Table 2. MAX350 Serial-Interface Switch Programming
Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers
MAX349/MAX350
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X = Don’t care. Data bit D7 is first bit in; data bit D0 is last in.
X1 Switch 0 open (off)X XX X
0
XX
X
MAX349 FUNCTION
XX XX1
1
X
DATA BITS
Switch 0 closed to COM
X
0
01
0
1
11
All switches open, D7–D0 = 0
Switch 7 open (off)
All switches closed to COM, D7–D0 = 1
All switches open, D7–D0 = 0
X
X1
X1
X1
1
1
Switch 6 open (off)
Switch 5 open (off)
Switch 6 closed to COM
Switch 7 closed to COM
X1
X1
X1
X1
Switch 4 open (off)
Switch 3 open (off)
Switch 4 closed to COM
Switch 5 closed to COM
X1
X1
X1
X1
Switch 2 open (off)
Switch 1 open (off)
Switch 2 closed to COM
Switch 3 closed to COM
D7
0
X
1
X
0
X
1
X
X
X
X
X
X
X
X
X
D6
0 0
XX
1
X
1
X
X
X
X
0
X
1
X
X
X
X
X
D4
X
X
0
X
X
X
X
X
1
X
X
X
X
D5
0 0
XX
1
X
1
X
X
X
X
X
X
X
X
0
X
1
X
D2
0 0
XX
1
X
1
RESET
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
D0
X
X
X
X
X
X
X
X
X
X
X
0
X
X
D1
X
X
0
X
X
X
X
X
1
D3
X XX XX1 X
1
Switch 1 closed to COMX
Table 1. MAX349 Serial-Interface Switch Programming
X1 Switch NO0A open (off)X XX X
0
XX
X
MAX350 FUNCTION
XX XX1
1
X
DATA BITS
Switch NO0A closed
X
0
01
0
1
11
All switches open, D7–D0 = 0
Switch NO0B open (off)
All “A” switches closed to COMA; All “B”
switches closed to COMB, D7–D0 = 1
All switches open, D7–D0 = 0
X
X1
X1
X1
1
1
Switch NO1B open (off)
Switch NO2B open (off)
Switch NO1B closed
Switch NO0B closed
X1
X1
X1
X1
Switch NO3B open (off)
Switch NO3A open (off)
Switch NO3B closed
Switch NO2B closed
X1
X1
X1
X1
Switch NO2A open (off)
Switch NO1A open (off)
Switch NO2A closed
Switch NO3A closed
D7
0
X
1
X
0
X
1
X
X
X
X
X
X
X
X
X
D6
0 0
XX
1
X
1
X
X
X
X
0
X
1
X
X
X
X
X
D4
X
X
0
X
X
X
X
X
1
X
X
X
X
D5
0 0
XX
1
X
1
X
X
X
X
X
X
X
X
0
X
1
X
D2
0 0
XX
1
X
1
RESET
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
D0
X
X
X
X
X
X
X
X
X
X
X
0
X
X
D1
X
X
0
X
X
X
X
X
1
D3
X XX XX1 X
1
Switch NO1A closed X