Data Sheet
26184.12C* 5804 BiMOS II UNIPOLAR
STEPPER-MOTOR TRANSLATOR/DRIVER
OUTPUT B 1 VDD 16 SUPPLY KBD 2 OE 15 OUTPUT
ENABLE OUTPUT D 3 14 DIRECTION GROUND 4 13 GROUND 5 12 GROUND C 6 11 STEP INPUT KAC 7 10 HALF-STEP OUTPUT A 8 9 ONE-PHASE LOGIC
GROUND
OUTPUT Dwg. W-194 Note that the UCN5804B (dual in-line package)
and UCN5804LB (small outline IC package) are
electrically identical and share a common
terminal number assignment. Combining low-power CMOS logic with high-current and high-voltage
bipolar outputs, the UCN5804B and UCN5804LB BiMOS II translator/
drivers provide complete control and drive for a four-phase unipolar steppermotor with continuous output current ratings to 1.25 A per phase (1.5 A
startup) and 35 V.
The CMOS logic section provides the sequencing logic, DIRECTION
and OUTPUT ENABLE control, and a power-on reset function. Three
stepper-motor drive formats, wave-drive (one-phase), two-phase, and halfstep are externally selectable. The inputs are compatible with standard
CMOS, PMOS, and NMOS circuits. TTL or LSTTL may require the use of
appropriate pull-up resistors to ensure a proper input-logic high.
The wave-drive format consists of energizing one motor phase at a time
in an A-B-C-D (or D-C-B-A) sequence. This excitation mode consumes the
least power and assures positional accuracy regardless of any winding
inbalance in the motor. Two-phase drive energizes two adjacent phases in
each detent position (AB-BC-CD-DA). This sequence mode offers an
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