ELM327LP datasheet(8/94 Pages) ELM

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ELM327L Electrical Characteristics (continued)

8 of 94

ELM327L DSA

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Notes (cont’d):

3. The Microchip 18F25K80 documentation states that all of the inputs used by the ELM327L have Schmitt

waveshaping on them. Sample testing however, has shown that pin 11 may respond as a standard ‘CMOS’

type input (ie not Schmitt) with a threshold voltage approximately equal to the average of the Schmitt

thresholds. For this reason, circuit designs should not present slowly changing waveforms at pin 11.

4. This applies to all output pins, except pins 3 and 4. Although pins 3 and 4 may seem capable of similar

currents, Microchip Technology states in their literature that these pins must not source or sink any more

than 2 mA.

The following values are for operation at 25°C, with

VDD = 3.3V.

Characteristic

Minimum

Typical

Maximum

Conditions

Units

2.3

rising

falling

1.5

1.3

All input pins use Schmitt trigger

waveshaping - see note 3

0.7

2.6

ELM327L

Average current, IDD

normal

low power

Output current drive

source

sink

Input logic levels

(Schmitt thresholds)

The following values are for operation at 25°C, with

VDD = 5.0V.

Characteristic

Minimum

Typical

Maximum

Conditions

Units

3.3

rising

falling

2.1

1.8

All input pins use Schmitt trigger

waveshaping - see note 3

1.0

4.0

Average current, IDD

5.5

0.13

normal

low power

Output current drive

source

sink

Input logic levels

(Schmitt thresholds)

see note 4

VO = 4.75V

VO = 0.25V

see note 4

VO = 3.05V

VO = 0.25V

5.0

0.03

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