ELM311 查看數據表（PDF） - Elm Electronics

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ELM311

Stepper Motor Controller

Elm Electronics 

ELM311

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.

Characteristic

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 ELM311 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.

ELM311DSB

Elm Electronics – Circuits for the Hobbyist

< http://www.elmelectronics.com/ >

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