Overview
IEC 61445:2012 - Digital Test Interchange Format (DTIF) defines the information content and data formats used to interchange digital test program data between digital automated test program generators (DATPGs) and automatic test equipment (ATE) for board‑level printed circuit assemblies (PCBs). The standard (IEC/IEEE dual‑logo, based on IEEE Std 1445‑1998) focuses on structuring the test-related data needed for generation, execution and diagnostic use of digital test programs.
Key Topics and Requirements
The standard organizes interchange data into four broad groups and specifies the information content and format requirements for each:
- UUT Model (Unit Under Test Model) - representation of the board‑level device topology and logical connectivity required by DATPGs and ATE to generate and interpret tests.
- Stimulus and Response - definitions for the digital test vectors, timing relationships and expected responses used to exercise and verify digital nodes.
- Fault Dictionary - standardized data structures for mapping observed failures to likely fault sites and types to support diagnosis and repair.
- Probe - information about physical probe/resource definitions (pin mapping, fixtures, I/O assignments) needed to correlate logical test data to the ATE hardware.
Additional standard aspects highlighted in the document:
- Interoperability focus: data formats that enable consistent exchange between different DATPG and ATE implementations.
- Normative references and stability: the publication references other standards and notes on implementation/legal considerations typical for IEC/IEEE documents.
(Note: IEC 61445 sets content and format requirements; implementers should consult the normative text for exact data model and file-format rules.)
Practical Applications
IEC 61445 (DTIF) is intended to:
- Enable portability of test programs between DATPGs and ATE platforms.
- Reduce manual rework when moving test patterns from generation tools to test hardware.
- Improve fault diagnosis by standardizing fault dictionary representations.
- Support manufacturing test flows for board‑level digital assemblies, including production testing, in‑line diagnostics and repair support.
Who Should Use This Standard
- Test engineers and test program developers working on PCB functional and structural testing.
- Vendors of DATPG software and ATE/test‑handler manufacturers implementing import/export features.
- Manufacturing engineers and test cell integrators who require consistent test data interchange.
- Quality, diagnostics and repair teams leveraging fault dictionaries for automated troubleshooting.
Related Standards
- IEEE Std 1445 (Digital Test Interchange Format) - the IEEE-origin technical basis for the IEC publication.
- See normative references listed in IEC 61445 for related test, automation and data model standards.
Keywords: IEC 61445, DTIF, Digital Test Interchange Format, DATPG, ATE, fault dictionary, UUT model, stimulus and response, board‑level testing, probe definitions, test program interchange.
