
MIC5800/5801
Truth Table
Micrel, Inc.
Output
OUT N
Information present at an input is transferred to its latch when
IN N
0
1
X
X
X
X
Strobe
1
1
X
X
0
0
Clear
0
0
1
X
0
0
Enable
0
0
X
1
0
0
t-1
X
X
X
X
ON
OFF
t
OFF
ON
OFF
OFF
ON
OFF
the STROBE is high. A high CLEAR input will set all latches
to the output OFF condition regardless of the data or
STROBE input levels. A high OUTPUT ENABLE will set all
outputs to the off condition, regardless of any other input
conditions. When the OUTPUT ENABLE is low, the outputs
depend on the state of their respective latches.
X = Irrelevant
t-1 = previous output state
t = present output state
Typical Application
Unipolar Stepper-Motor Drive
OUTPUT ENABLE
0.1μF
+30V
CLEAR
1
14
STROBE
IN1
2
3
13
12
VDD
OUT1
μP
IN2
4
11
OUT2
IN3
IN4
5
6
7
10
9
8
OUT3
OUT4
0.1μF
STEPPER
MOTOR
+30V
MIC5800
STROBE
IN 1
IN 2
IN 3
IN 4
OUT 1
OUT 2
OUT 3
OUT 4
UNIPOLAR WAVE DRIVE
STROBE
IN 1
IN 2
IN 3
IN 4
OUT 1
OUT 2
OUT 3
OUT 4
UNIPOLAR 2-PHASE DRIVE
March 2005
5
MIC5800/5801