PG001M
PARALLEL-TO-SERIAL
DATA CONVERTER
The PG001M CMOS IC converts parallel-data signals from a low-
cost, 8-bit microprocessor or microcontroller into a serial-data format
compatible with the SLA7042M and SLA7044M power multi-chip
modules to drive unipolar PWM, high-current stepper motors. The
converter provides for five basic modes of operation:
1) normal, two-phase, full step (100% torque vector),
2) two-phase 'boosted' torque (141% torque vector),
3) half-step, constant torque operation (using a 2-1-2 output switching),
4) quarter-stepping utilizing ratioed currents for constant torque, and
5) microstepping (1/8
th
steps) for quiet, smooth, resonance-free motor
performance.
The PG001M is supplied in a low-cost 16-pin dual in-line plastic
package. It is rated for continuous operation over the temperature
range of -20°C to +85°C.
Data Sheet
26112
RESET
CLOCK
1
2
V DD
16
15
CONTROL
SUPPLY
VECTOR
CONTROL
CLOCK OUT
STROBE
NO
CONNECT.
SERIAL
DATA A
SERIAL
DATA B
MONITOR
IN
PARALLEL-TO-SERIAL
CCW/CW
NOT USABLE
NOT USABLE
MODE
SELECT
. .
1
MODE
.
SELECT
.
2
GROUND
3
4
5
6
7
8
CONTROL LOGIC
14
CONVERTER
13
12
11
10
9
Dwg. PK-009
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V
DD
....................
7.0 V
Input Voltage Range,
V
I
................
-0.5 V to V
DD
+ 0.5 V
Input Current, I
I
.......................
±
10 mA
Output Voltage Range,
V
O
...............
-0.5 V to V
DD
+ 0.5 V
Output Current, I
O
...................
±
15 mA
Operating Temperature Range,
T
A
..........................
-20
°
C to +85
°
C
Storage Temperature Range,
T
S
........................
-40
°
C to +150
°
C
CAUTION: CMOS devices have input static
protection but are susceptible to damage if
exposed to extremely high static electrical
charges.
FEATURES
s
Intended For Use With SLA7042M or SLA7044M
Microstepping, Unipolar PWM, High-Current Motor Drivers
s
Supports Five Stepper-Motor Operating Modes
s
µP-Compatible
Inputs
Always order by complete part number,
PG001M .
™
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
