A replacement for LCMXO2-1200HC-4TG144C must be assessed against the implemented design. Matching package names, logic counts or a catalog similarity grade is not an approval to install another part on the same PCB.
HC power connection: use a nominal 2.5 V or 3.3 V external VCC supply. HC contains an internal regulator; HE and ZE use a 1.2 V external VCC supply. Do not substitute the internal core voltage for the HC board supply. See the power-supply table in the Hardware Checklist.
What to compare
| Item | Specification or design check |
|---|---|
| Complete ordering code | Density, HC/HE/ZE variant, speed, package and temperature suffix |
| Pin assignment | Every used signal, supply, ground, clock and configuration function |
| Electrical requirements | External VCC, each bank voltage, I/O standard and connected-device limits |
| Design fit | Memory, logic, clocking resources and constrained timing results |
| Programming | Target selection, regenerated image and recovery process |
| Board acceptance | Startup states, functional tests and operating-temperature requirements |
Candidate classes
Different speed or temperature suffix: retain the exact proposed ordering code and compare its electrical and timing requirements. Re-run the project's acceptance checks before approving it.
Different density in the same package: check the manufacturer migration information and every assigned pin, then retarget and compile the project. Neither a larger LUT count nor the same package outline proves compatibility.
HE or ZE instead of HC: treat the external supply difference as an explicit design-review item. Changing the suffix is not merely a catalog or purchasing change.
Another manufacturer or architecture: evaluate this as a redesign option. Review PCB, power, HDL/IP and programming-tool changes before estimating cost or schedule.
Document the decision
Use one record per candidate with the source ordering code, proposed code, source documents, mismatches, required design changes and validation results. Keep candidates pending until the responsible engineering team approves the specific board revision.
Frequently asked questions
Does a commercial-to-industrial suffix change automatically qualify a substitute?
No. A wider published temperature range does not itself document compatibility with your implementation. Check the exact part, timing, electrical limits and configuration.
Can a catalog suggest candidates?
Yes. Candidate discovery can reduce the search effort, but an electrical comparison and board validation are still separate tasks. This guide does not approve any specific substitute.
Use Lattice ordering, electrical and density-migration information when recording these checks.
Named same-family candidates and their first review gate
The following ordering codes are listed in Lattice's commercial and industrial ordering tables. Their presence in the table establishes that they are defined variants. It does not establish stock or approve them for an existing board.
| Ordering code | Published difference from the baseline | First review gate |
|---|---|---|
| LCMXO2-1200HC-4TG144C | Baseline: HC, -4, TG144, commercial | Use the currently approved schematic, constraints and image as the reference. |
| LCMXO2-1200HC-5TG144C | -5 speed grade; same listed density, supply class, package and commercial grade | Retarget and compare timing requirements and implementation results; do not approve from the suffix alone. |
| LCMXO2-1200HC-6TG144C | -6 speed grade; same listed density, supply class, package and commercial grade | Check the exact device timing and project target before considering production use. |
| LCMXO2-1200HC-4TG144I | Industrial rather than commercial temperature grade | Review the relevant electrical and timing conditions, approved BOM and qualification requirements. |
| LCMXO2-1200HC-4TG144CR1 | R1-marked commercial variant with exceptions identified by the manufacturer | Read the R1 specifications and programming/design implications; do not silently remove the revision marker. |
Compare a candidate in a repeatable order
- Freeze the baseline. Save the approved ordering code, board revision, pin constraints, clock constraints and current programming file. Record why a substitute is being considered: availability, temperature, cost or a design change.
- Compare the physical and electrical interface. Check every used pin, supply and bank standard against the candidate. Mark a mismatch explicitly instead of recording a general “same package” result.
- Retarget the project. Regenerate the implementation for the candidate as required by the tool flow. Review changed resource mapping, unconstrained paths, setup/hold results and programming target.
- Check configuration and recovery. Verify the intended nonvolatile image, configuration preferences and access after startup. A chain scan only identifies the device interface; it does not validate the application.
- Run the board acceptance plan. Test defined startup, reset, interface and environmental conditions on the affected board revision. Keep the results tied to the candidate code and build identifier.
Example decision record
Suppose a quotation offers LCMXO2-1200HC-5TG144C against a BOM calling for -4TG144C. The useful first answer is “same listed HC/TG144 class, different speed grade; engineering review pending.” Attach the candidate data sheet and implementation reports. If a clock path or startup requirement is not checked, leave that item open; do not convert an incomplete comparison into an equivalence label.
| Record field | Example of the required evidence |
|---|---|
| Identity | Baseline and candidate complete codes, board revision and source documents |
| Mismatches | Changed suffix, pin function, operating condition or tool setting |
| Implementation | Retargeted build, pin report, timing report and configuration file identifier |
| Acceptance | Test conditions, results, open issues and responsible engineering approval |
Use the baseline specifications guide for selection context and the diagnostic guide if the candidate board fails a programming or boot check. Neither guide supplies a blanket replacement approval.
Request this ordering code
For a quotation, provide LCMXO2-1200HC-4TG144C, quantity, required delivery date, and any packaging, date-code or documentation requirements. Price, availability, lead time and supplied documentation are confirmed in the written quotation.
Find LCMXO2-1200HC-4TG144C · Send an RFQ
Manufacturer documents
- FPGA-DS-02056-4.7, July 2026 — Device selection tables, 3.2 Recommended Operating Conditions, 3.5 Programming/Erase Specifications, Ordering Information
- FPGA-TN-02154-2.2 — 2 Power Supplies, 3 Power Supply Filtering, 6 Programming, 10 True-LVDS Output Pin Assignments
- FPGA-TN-02155-5.0 — 5 Configuration Process, 6 Configuration Ports, 7 Preferences
- MachXO2 family table — Device Selection Guide, 144-pin TQFP I/O count