DatasheetsPDF.com

MOTOR CONTROLLER. ELM312 Datasheet

DatasheetsPDF.com

MOTOR CONTROLLER. ELM312 Datasheet






ELM312 CONTROLLER. Datasheet pdf. Equivalent




ELM312 CONTROLLER. Datasheet pdf. Equivalent





Part

ELM312

Description

STEPPER MOTOR CONTROLLER

Manufacture

ELM Electronics

Datasheet
Download ELM312 Datasheet


ELM Electronics ELM312

ELM312; ELM312 Stepper Motor Controller Descript ion The ELM312 is an interface circuit for use between high speed logic and fo ur phase stepper motor driver circuits. All of the logic required to provide s tepping in two directions is contained in this one 8 pin package. This circuit supports only the half-step mode of op eration. This mode provides eight disti nct phase control .


ELM Electronics ELM312

output signals for driving a variety of motors. For dual mode operation, the EL M310 should be considered. The ELM312 c an be controlled by a wide variety www. DataSheet4U.com of circuits, due to its fully static operation. In addition to using high speed microprocessor contro l, suitably debounced mechanical switch es or continuously running oscillator c ircuits could also.


ELM Electronics ELM312

be used. Features • • • • • Low power CMOS design - typically 1mA a t 5V Wide supply range - 3.0 to 5.5 vol t operation Two inputs control Half ste p motion No external timing components Completely static operation - will main tain a step position indefinitely • H igh current drive outputs - up to 25 mA • Very high speed - up to 25000 step s per second Connection Diagram.



Part

ELM312

Description

STEPPER MOTOR CONTROLLER

Manufacture

ELM Electronics

Datasheet
Download ELM312 Datasheet




 ELM312
ELM312
Stepper Motor Controller
Description
The ELM312 is an interface circuit for use
between high speed logic and four phase stepper
motor driver circuits. All of the logic required to
provide stepping in two directions is contained in this
one 8 pin package.
This circuit supports only the half-step mode of
operation. This mode provides eight distinct phase
control output signals for driving a variety of motors.
For dual mode operation, the ELM310 should be
considered.
The ELM312 can be controlled by a wide variety
www.DataSheeotf4cUir.ccuoitms, due to its fully static operation. In addition
to using high speed microprocessor control, suitably
debounced mechanical switches or continuously
running oscillator circuits could also be used.
Features
• Low power CMOS design - typically 1mA at 5V
• Wide supply range - 3.0 to 5.5 volt operation
• Two inputs control Half step motion
• No external timing components
• Completely static operation - will maintain a step
position indefinitely
• High current drive outputs - up to 25 mA
• Very high speed - up to 25000 steps per second
Connection Diagram
PDIP and SOIC
(top view)
Applications
• Stepper motor drive logic
• Process sequencing
• Sequential left/right LED driver
VDD 1
A2
Dir 3
Step 4
8 VSS
7B
6C
5D
Block Diagram
20msec
Startup
Timer
Inhibit
Dir 3
Step 4
CW
Step
2A
7B
6C
5D
ELM312DSB
Elm Electronics – Circuits for the Hobbyist
< http://www.elmelectronics.com/ >
1 of 5





 ELM312
ELM312
Pin Descriptions
VDD (pin 1)
This pin is the positive supply pin, and should
always be the most positive point in the circuit.
Internal circuitry connected to this pin is used to
provide power on reset of the microprocessor, so
an external reset signal is not required. Refer to
the Electrical Characteristics section for further
information.
A (pin 2)
This is the active high output drive signal for the
(first) phase A winding. Normally, this output
www.DataSheet4wUou.cldombe the first to be energized when starting a
stepping sequence, and is always the first state
entered into internally on powerup. After powerup,
however, the ELM312 treats this pin specially,
maintaining it at a low level until the first step
command is received. This in effect keeps the
motor off until selected by control circuitry.
Dir (pin 3)
This pin determines the sequence that the outputs
will be energized in. A high input on the Dir pin
while the step input is pulsed will cause a single
clockwise step, while a low level will cause a
counter-clockwise step. (Refer to Figures 1 & 2).
Dir must be at a stable level prior to the low to
high transition of Step in order to be recognized
(refer to the Tsu specification).
Step (pin 4)
This input is used to control the motion of the
motor. Outputs will change to their next state on
the high to low transition of this input. Step is
normally maintained at a low level, and is only
brought high then low to cause a step to occur.
The Step input is ignored for about 20ms after
power-up to allow sufficient time for external
circuits to stabilize.
D (pin 5)
This is the active high output drive signal for the
(fourth) phase D winding.
C (pin 6)
This is the active high output drive signal for the
(third) phase C winding.
B (pin 7)
This is the active high output drive signal for the
(second) phase B winding.
VSS (pin 8)
Circuit common is connected to this pin. This is
the most negative point in the circuit.
Ordering Information
These integrated circuits are available in either the 300 mil plastic DIP format, or in the 200 mil SOIC surface
mount type of package. To order, add the appropriate suffix to the part number:
300 mil Plastic DIP............................... ELM312P
200 mil SOIC..................................... ELM312SM
All rights reserved. Copyright ©1999 Elm Electronics.
Every effort is made to verify the accuracy of information provided in this document, but no representation or warranty can be
given and no liability assumed by Elm Electronics with respect to the accuracy and/or use of any products or information
described in this document. Elm Electronics will not be responsible for any patent infringements arising from the use of these
products or information, and does not authorize or warrant the use of any Elm Electronics product in life support devices and/or
systems. Elm Electronics reserves the right to make changes to the device(s) described in this document in order to improve
reliability, function, or design.
ELM312DSB
Elm Electronics – Circuits for the Hobbyist
< http://www.elmelectronics.com/ >
2 of 5





 ELM312
ELM312
Absolute Maximum Ratings
Storage Temperature....................... -65°C to +150°C
Ambient Temperature with
Power Applied....................................-40°C to +85°C
Voltage on VDD with respect to VSS............ 0 to +7.5V
Voltage on any other pin with
respect to VSS........................... -0.6V to (VDD + 0.6V)
Note:
Stresses beyond those listed here will likely damage
the device. These values are given as a design
guideline only. The ability to operate to these levels
is neither inferred nor recommended.
Electrical Characteristics
All values are for operation at 25°C and a 5V supply, unless otherwise noted. For further information, refer to note 1 below.
www.DataSheet4U.comCharacteristic
Minimum Typical Maximum Units
Conditions
Supply Voltage, VDD
3.0 5.0 5.5 V
VDD rate of rise
0.05
V/ms see note 2
Average Supply Current, IDD
1.0 2.4 mA VDD = 5V
Input low voltage
VSS
0.15 VDD
V see note 3
Input high voltage
0.85 VDD
VDD V see note 3
Output low voltage
0.6 V Current (sink) = 8.7mA
Output high voltage
Direction Input Setup Time (Tsu)
Hold Time (Th)
VDD - 0.7
2
0
V Current (source) = 5.4mA
- µsec see note 4
- µsec see note 4
Step Pulse Width (Tp)
10
- µsec see note 4
Delay Between Steps (Td)
30
- µsec see note 4
Step Inhibit on Power-up
10 20 30 msec see note 5
Notes:
1. This integrated circuit is produced with a Microchip Technology Inc.’s PIC12C5XX as the core embedded
microcontroller. For further device specifications, and possibly clarification of those given, please refer to the
appropriate Microchip documentation.
2. This spec must be met in order to ensure that a correct power on reset occurs. It is quite easily achieved
using most common types of supplies, but may be violated if one uses a slowly varying supply voltage, as
may be obtained through direct connection to solar cells, or some charge pump circuits.
3. This IC is uses CMOS technology so input currents to the logic are negligible. Each input does have internal
diode protection circuits, however, which may cause up to 1µA of leakage currents to flow.
4. Operation of the ELM312 is completely static, so there is no maximum time for any of these parameters.
Each of the values is graphically displayed in Figure 1 on page 4.
5. The Step input will initially be blocked for this time, to allow external circuits time to stabilize.
ELM312DSB
Elm Electronics – Circuits for the Hobbyist
< http://www.elmelectronics.com/ >
3 of 5



Recommended third-party ELM312 Datasheet






@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)