Elm Electronics – Circuits for the Hobbyist

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ELM415

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. Pullup resistor currents are not included in this figure.

4. The value of the internal pullup resistance is both supply and temperature dependent.

5. The time for which the input must remain stable before it is considered valid by internal logic.

6. The Up/Down output will be stable for this time period before the output of a Count pulse.

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

Internal pullup resistance

see note 2

ELM415DSA

20

30

50

K

Ω

Pins 6 & 7, see note 4

Debounce period

msec

30

see note 5

Up/Down setup time

Count output pulse width

msec

1

msec

1

see note 6