L297/1 STMicroelectronics, L297/1 Datasheet - Page 5

• Manufacturer Part Number: L297/1
• Description: IC STEPPER MOTOR CTRLR 20-DIP
• Manufacturer: STMicroelectronics
• Type: Stepper Motor Controller/Driverr

Specifications of L297/1

• Applications: Stepper Motor Controller
• Number Of Outputs: 4
• Voltage - Supply: 4.75 V ~ 7 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Through Hole
• Package / Case: 20-DIP (0.300", 7.62mm)
• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 7 V
• Supply Current: 80 mA
• Mounting Style: Through Hole
• Current, Quiescent Supply: 50 mA (Typ.)
• Number Of Pins: 20
• Package Type: DIP20
• Power Dissipation: 1 W
• Temperature, Junction, Maximum: 150 °C
• Temperature, Storage: -40 to +150 °C
• Voltage, Input: 0.6 V (Max.)
• Voltage, Supply: 4.75 to 7 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-1394-5

MOTOR DRIVING PHASE SEQUENCES
The L297’s translator generates phase sequences
for normal drive, wave drive and half step modes.
The state sequences and output waveforms for
these three modes are shown below. In all cases
the translator advances on the low to high transis-
tion of CLOCK.
HALF STEP MODE
Half step mode is selected by a high level on the HALF/FULL input.
NORMAL DRIVE MODE
Normal drive mode (also called "two-phase-on" drive) is selected by a low level on the HALF/FULL input
when the translator is at an odd numbered state (1, 3, 5 or 7). In this mode the INH1 and INH2 outputs
remain high throughout.
Clockwise rotation is indicate; for anticlockwise ro-
tation the sequences are simply reversed RESET
restores the translator to state 1, where ABCD =
0101.
L297
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