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ELM325 - J1708 Interpreter

General Description

With the advent of electronic engine controls, many vehicles also adopted some form of diagnostic tools to help monitor their operation.

Key Features

  • Supports both SAE J1587 and J1922.
  • High speed RS232 interface.
  • Works with standard RS485 transceivers.
  • Fully configurable with AT commands.
  • Wide operating voltage range (1.8 to 5.5V).
  • Low power CMOS design Connection Diagram PDIP and SOIC (top view) VDD 1 XT1 2 XT2 3 InvDE 4 RS232 Rx 5 RS232 Tx 6 RS Rx LED 7 14 VSS 13 RO 12 RE 11 DE 10 J Tx LED 9 J Rx LED 8 RS Tx LED Block Diagram RS232 Rx 5 RS232 Tx 6 RS232 Interface 3.58 MHz XT1 2.

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Datasheet Details

Part number ELM325
Manufacturer ELM
File Size 182.33 KB
Description J1708 Interpreter
Datasheet download datasheet ELM325 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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ELM325 J1708 Interpreter Description With the advent of electronic engine controls, many vehicles also adopted some form of diagnostic tools to help monitor their operation. As more modules began to be used in vehicles, there was also a need for the devices to share information rather than each independently obtaining it from separate sensors. In the 1980’s, the SAE J1708 standard was created to provide a specification for a common data bus to be used in heavy duty vehicles. It used RS485 wiring (already proven to be reliable in noisy environments), and a UART-based low speed data format. The SAE J1587 standard followed a few years later to describe the mechanism by which messages and data should be sent between vehicle modules.