MIC5800/5801
Micrel
Information present at an input is transferred to its latch when
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.
Truth Table
Output
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
OUT
N
t
OFF
ON
OFF
OFF
ON
OFF
X = Irrelevant
t-1 = previous output state
t = present output state
Typical Application
Unipolar Stepper-Motor Drive
OUTPUT ENABLE
0.1µF
CLEAR
STROBE
IN1
1
2
3
LATCHES
+30V
14
VDD
13
12
11
10
9
8
OUT1
OUT2
OUT3
OUT4
0.1µF
STEPPER
MOTOR
µP
IN2
IN3
IN4
4
5
6
7
+30V
MIC5800
UNIPOLAR WAVE DRIVE
STROBE
IN 1
IN 2
IN 3
IN 4
OUT 1
OUT 2
OUT 3
OUT 4
STROBE
IN 1
IN 2
IN 3
IN 4
OUT 1
OUT 2
OUT 3
OUT 4
UNIPOLAR 2-PHASE DRIVE
7
October 1998
7-15
MICREL [ MICREL SEMICONDUCTOR ]
