A3979SLP Allegro Microsystems Inc, A3979SLP Datasheet - Page 6

• Manufacturer Part Number: A3979SLP
• Description: IC DRIVER MICROSTEPPING 28-TSSOP
• Manufacturer: Allegro Microsystems Inc

Specifications of A3979SLP

• Applications: Stepper Motor Driver
• Number Of Outputs: 1
• Current - Output: ±2.5A
• 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: 28-TSSOP Exposed Pad, 28-eTSSOP, 28-HTSSOP
• Operating Current: 12mA
• Operating Temperature Classification: Commercial
• Package Type: TSSOP EP
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

A3979
Figure 1. Logic Interface Timing Diagram
DIR/RESET
MS1/MS2/
SLEEP
STEP
(T
A
= +25°C, V
A. Minimum Command Active Time
B. Minimum Command Active Time
C. Minimum STEP Pulse Width ...................... 1.0 μs
D. Minimum STEP Low Time ......................... 1.0 μs
E. Maximum Wake-Up Time ......................... 1.0 ms
Before Step Pulse (Data Set-Up Time) ..... 200 ns
After Step Pulse (Data Hold Time) ............ 200 ns
E
Table 1. Microstep Resolution Truth Table
MS1
H
H
L
L
A
DMOS Microstepping Driver with Translator
DD
MS2
H
H
L
L
50%
= 5 V, Logic Levels are V
B
Full Step
Half Step
Quarter Step
Sixteenth Step
Microstep Resolution
C
2 Phase
1-2 Phase
W1-2 Phase
4W1-2 Phase
Excitation Mode
DD
and Ground)
D
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
Dwg. WP-042
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