Elm Electronics – Circuits for the Hobbyist

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ELM310

Electrical Characteristics

Absolute Maximum Ratings

Storage Temperature....................... -65°C to +150°C

Ambient Temperature with

Power Applied....................................-40°C to +85°C

Voltage on any other pin with

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.

3 of 5

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

Conditions

Units

3.0

5.0

5.5

V

0.05

V/ms

1.0

2.4

mA

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. Each of the values is graphically displayed in the Timing Diagrams on page 4.

5. During a mode change, the Dir input must remain stable for at least Tsu before any transition of Step.

Input low voltage

V

Input high voltage

V

Output low voltage

0.6

V

Output high voltage

V

Current (sink) = 8.7mA

Current (source) = 5.4mA

see note 2

ELM310DSB

Delay Between Steps (Td)

Step Pulse Width (Tp)

µsec

10

-

- after a mode change (Td2)

µsec

30

-

µsec

50

-

see note 4

see note 4

see note 4

µsec

2

-

µsec

0

-

Direction Input Setup Time (Tsu)

Hold Time (Th)

see notes 4 & 5

see note 4

see note 3

see note 3

Step Inhibit on Power-up

10

20

30

msec