ELM327 Ver la hoja de datos (PDF) - Elm Electronics

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componentes Descripción

Fabricante

ELM327

OBD to RS232 Interpreter

Elm Electronics 

ELM327

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

4.2

5.0

5.5

V

VDD rate of rise

0.05

V/ms see note 2

Average current, IDD

normal

12

mA ELM327 device only - does not

include any load currents

low power

0.15

mA

Input logic levels

low

VSS

0.8

V Pins 5, 6, 7, and 24 only

high

3.0

VDD

V

Schmitt trigger

input thresholds

rising

2.9

4.0

V Pins 1, 11, 12, 13, 15 and 18 only

falling

1.0

1.5

V

Output low voltage

0.3

V current (sink) = 10 mA

Output high voltage

4.4

V current (source) = 10 mA

Brown-out reset voltage

A/D conversion time

2.65

2.79

2.93

V

9

msec AT RV to beginning of response

Pin 18 wake pulse duration

128

µsec to wake from Low Power mode

IgnMon debounce time

50

65

msec

AT LP to PwrCtrl output time

1.0

sec

LP ALERT to PwrCtrl output time

Reset time

AT Z

AT WS

2.0

sec

800

msec Measured from the end of the

command to the start of the ID

2

msec message (ELM327 v2.1)

Notes:

1. This integrated circuit is based on Microchip Technology Inc.’s PIC18F2480 device. For more detailed

device specifications, and possibly clarification of those given, please refer to the Microchip documentation

(available at www.microchip.com).

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.

ELM327DSJ

Elm Electronics – Circuits for the Hobbyist

www.elmelectronics.com

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