APPLICATION NOTE
©2022 TRINAMIC Motion Control GmbH & Co. KG, Hamburg, Germany
Download newest version at: www.trinamic.com
AN080: TMC8462A-BA Migration Guide from TMC8462-BA
Document Revision V1.00 •2022-Nov-15
Contents
1 Introduction 1
2 Changes 1
3 Compatibility 2
4 Revision History 2
1 Introduction
EtherCAT is an industrial real-time Ethernet bus. It relies on the standard Ethernet physical layer and re-
quires dedicated interface ICs – so-called EtherCAT Slave Controllers (ESC) – to handle the Datalink layer
EtherCAT protocol.
TRINAMIC’s TMC8462-BA ESC was EOL-ed and is replaced with the TMC8462A-BA (A-version).
This migration guide lists the differences of the non-A and A-version of TRINAMIC’s EtherCAT Slave Con-
troller Chip (ESC) TMC8462-BA and TMC8462A-BA and how to successfully migrate to the A-version TMC8462A-
BA.
2 Changes
The following changes apply from TMC8462-BA to TMC8462A-BA:
•Revision field of IC label changes to “A”: TMC8462-BA to TM8462A-BA
•Corrected Case 1 in the Errata of TMC8462-BA Datasheet V1.6:
–Fix: The PHY configuration was changed to the proper mode setting. The LINK/ACT LEDs and
link indicator signal will not show a start-up pulse anymore and will thus not increase link-loss
counters unnecessarily.
•ESD ratings improved/updated: HBM 2.5kV, CDM 750V
•Master clock input changes from 100MHz to 25MHz
•Pin name L3 changes from REF_CLK100_IN to REF_CLK25_IN
•TMC8462A-BA requires pin TSTCLK_SELECT connected to GND for standard operation
•Temperature ratings corrected based on PHY specs
AN080: TMC8462A-BA Migration Guide from TMC8462-BA •Application Note •Document Revision V1.00 •2022-Nov-15 2/2
3 Compatibility
The new revision TMC8462A-BA will work in the same circuit as the TMC8462-BA version. Anyhow, it
is recommended to qualify the new TMC8462A-BA within the existing design and application for series
production.
We recommend adapting the circuit/layout to properly migrate to the new TMC8462A-BA version as given
below:
•Replace TMC8462A-BA external reference clock source. Use 25MHz instead of 100MHz.
•Connect pin TSTCLK_SELECT to GND instead of VCCIO / +3.3V.
The following items remain unchanged:
•No change in package type and package mechanical dimensions
•No change in control software or slave configuration
•Absolute maximum electrical ratings unchanged
•Assembly and test facility stay unchanged
4 Revision History
Version Date Author Description
V1.00 15.11.2022 SK Initial release
Table 1: Document Revision
©2022 TRINAMIC Motion Control GmbH & Co. KG, Hamburg, Germany
Terms of delivery and rights to technical change reserved.
Download newest version at www.trinamic.com
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