A4985SESTR-T Allegro Microsystems Inc, A4985SESTR-T Datasheet - Page 6

• Manufacturer Part Number: A4985SESTR-T
• Description: IC STEPPER MOTOR DRIVER 24QFN
• Manufacturer: Allegro Microsystems Inc

Specifications of A4985SESTR-T

• Applications: Stepper Motor Driver, 2 Phase
• Number Of Outputs: 1
• Current - Output: *
• Voltage - Load: 8 V ~ 35 V
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-WFQFN Exposed Pad
• Motor Type: Stepper
• No. Of Outputs: 2
• Output Current: 1A
• Output Voltage: 35V
• Supply Voltage Range: 3V To 5.5V
• Driver Case Style: QFN
• No. Of Pins: 24
• Operating Temperature Range: -20°C To +85°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 620-1374 - Board Eval Motor Control A4985
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

A4985
Figure 1. Logic Interface Timing Diagram
RESET, or DIR
MS1, MS2,
STEP
STEP minimum, HIGH pulse width
STEP minimum, LOW pulse width
Setup time, input change to STEP
Hold time, input change to STEP
Table 1. Microstep Resolution Truth Table
MS1
H
H
L
L
Time Duration
DMOS Microstepping Driver with Translator
MS2
H
H
L
L
t
C
Full Step
Half Step
Quarter Step
Eighth Step
Microstep Resolution
t
D
t
A
Symbol
t
t
t
t
A
B
C
D
And Overcurrent Protection
2 Phase
1-2 Phase
W1-2 Phase
2W1-2 Phase
Excitation Mode
Typ.
200
200
1
1
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
Unit
μs
μs
ns
ns
t
B
6