Why This Checklist Exists (And Who It's For)
I'm the office administrator who handles purchasing for a 250-person industrial equipment manufacturer. When I took over procurement in 2020, I managed roughly $400k annually across 8 vendors for electronics components, connectivity hardware, and prototyping supplies. My job is straightforward: get the right parts at the right price, keep engineering happy, and don't get a call from accounting.
If you're evaluating Semtech products—especially after the Sierra Wireless acquisition—for a new router or IoT gateway project, this checklist is for you. It's based on what I've learned ordering LoRa chips (like the sx1276 and sx1262), LoRaWAN gateways (sx1301-based), and comparing them with alternatives. There are 5 steps, and one of them most people skip until it's too late.
Step 1: Verify the Chip Generation Against Your Range Requirements
This sounds obvious, but I've made this mistake. In my first year, I assumed "LoRa" meant the same range for all Semtech transceivers. It doesn't.
Semtech has several families of LoRa chips. For our long-range sensor network (think 10+ km line-of-sight), we needed the sx1272 or sx1276 series. These older but proven chips offer better sensitivity for extreme range applications. The newer sx126x family is smaller and lower power, which is great for battery devices in urban settings, but the range ceiling is different.
Check the datasheet's link budget, not just the marketing range claims. The sx1276 has a max link budget of 168 dB, while the sx1262 sits around 160 dB. That difference matters if you're expecting 15 km rural links. Don't assume newer means longer range.
How I Check This Now
I pull the specific part number's data sheet from semtech.com (they're all publicly available). I look for the sensitivity spec in dBm at the lowest data rate. If I'm comparing an sx1276-based module vs an sx1262-based one for a rural agricultural router, I know the sx1276 is likely the better choice for raw reach.
Step 2: Confirm Gateway Chip Compatibility (sx1301 vs sx1302)
This is the step most people gloss over. Not all LoRaWAN gateways work the same way, and the chip choice inside the gateway—usually a Semtech sx1301 or the newer sx1302—affects network capacity and cost.
The sx1301 is the workhorse for most 8-channel gateways. It can handle a lot of concurrent messages, but it's an older design. The sx1302 is smaller, cheaper, and easier to integrate, but it has some differences in how it handles downlink traffic. For a high-traffic router serving 500+ end nodes, the sx1301 is still a safer bet for proven reliability.
Also, I learned the hard way that some gateway vendors list "Semtech LoRa" without specifying the chip variant. If I'm ordering a router for a dense industrial deployment, I now specify the sx1301 in the purchase order. If the vendor says "equivalent or better," I ask for the part number.
Step 3: Evaluate the "Semtech Sierra Wireless" Factor for Cellular Backup
Since Semtech acquired Sierra Wireless, their portfolio now includes cellular modules (LTE Cat 1, NB-IoT, etc.) alongside LoRa. This is a big deal for router design. Instead of buying a separate LoRa module from Semtech and a cellular modem from another vendor, you can potentially source both from one supply chain.
But here's the catch: the integration isn't plug-and-play yet. I ordered a batch of Semtech LoRa modules for a router prototype, and engineering wanted LTE-M backup. We ended up sourcing an HL78 series module from Sierra Wireless (now technically Semtech). The LoRa and LTE worked independently, but integrating them on the board required extra design work. The promise of "one vendor" is real, but it's still maturing.
My advice: if you're designing a router that needs both LoRa and cellular, get a preliminary integration guide from Semtech's FAE team before you commit to a full board layout. The support is good (professional but approachable, as I've found), but timelines can stretch if you assume everything works together out of the box.
Step 4: Compare Router-Level Specs vs. Cisco (But Be Realistic)
You're probably here because someone mentioned vs Cisco. I get it. Cisco is the reference for enterprise routing. Their routers are rock-solid for IP networking. But they don't do LoRaWAN natively. You'd need an external LoRa gateway box bolted onto a Cisco router.
Semtech's Airlink brand (part of the Sierra Wireless acquisition) makes industrial routers that can integrate LoRaWAN gateways internally. The MP70 router, for example, has a version that includes an embedded LoRa radio. So your comparison isn't really "Semtech vs Cisco"—it's "should I buy a Cisco router + a third-party LoRa gateway, or an Airlink router with integrated LoRaWAN?"
Here's how I break it down in my head:
- Cisco + separate LoRa gateway: Best for enterprises that already have Cisco infrastructure. Higher total cost, two vendors to manage, but proven networking reliability.
- Airlink Router (Semtech): Best for greenfield IoT deployments in industrial or remote locations. One vendor for the full stack (LoRa, cellular, routing). The integrated support means one call for troubleshooting.
I can't say one is universally better. But if your network team is Cisco-trained, they'll push back on Airlink. Mine did. We compromised by using Airlink for the edge gateways (where LoRa is critical) and Cisco for the core network backbone.
Step 5: Validate the Supply Chain (Don't Assume Lead Times)
This is the boring but critical step. After 5 years of managing these relationships, I can tell you: a great chip doesn't matter if you can't get it.
As of early 2025, some of the older LoRa chips like the sx1278 have longer lead times (8-12 weeks on allocation) because Semtech is pushing production toward newer families. The sx1262 and sx1268 are generally more available. Ask your distributor (Digi-Key, Mouser, Arrow) for the actual lead time, not the typical lead time.
Also, pay attention to minimum order quantities for modules vs bare chips. For a low-volume prototype run, buying sx1262 modules with a pre-certified antenna connector saved us 6 weeks of compliance testing. The modules cost more per unit, but the reduced engineering risk was worth it.
A Quick Tip on Distributors
Semtech doesn't sell direct for small-to-medium orders. The vendors who can't provide proper invoicing (handwritten receipts only, ugh) cost me $2,400 in rejected expenses in 2021. Now I only use authorized distributors listed on semtech.com. Verify the distributor's ability to issue a proper invoice and show the manufacturer part number before you place the PO.
Common Mistakes I've Made (So You Don't Have To)
- Assuming "LoRa" is generic: Semtech owns the LoRa trademark. When you see "LoRa chip" in a datasheet, it's a Semtech patent license. Don't assume compatibility with a different radio technology.
- Forgetting the band plan: The US uses 915 MHz ISM band. Europe uses 868 MHz. I once ordered a batch of sx1272 modules configured for EU868 by mistake. The distributor, thankfully, let us swap them (at a restocking fee, which I ate out of the department budget—ugh).
- Over-relying on spreadsheet comparisons: Spec sheets don't tell you about real-world interference handling. In our factory environment (lots of metal and machinery), the sx1262 modules performed worse than the sx1276 for reliable packet delivery at 2 km. You can't spreadsheet your way out of that. Get an evaluation kit.
When to Say "This Isn't for Us"
One thing that's changed how I think about procurement is a vendor who said, "This isn't our strength—here's who does it better." I apply that same thinking to Semtech products. If your primary goal is high-speed Wi-Fi routing for a corporate office, LoRa isn't the right tool. You want Cisco or Ubiquiti. LoRa is for long-range, low-power data (like sensor readings every 15 minutes).
Per FTC guidelines (ftc.gov), I have to be clear: Semtech doesn't claim their LoRa chips do everything. Their focus on long-range, low-power wireless is exactly what makes them good at it. A vendor who tries to sell you LoRa for real-time video streaming isn't being honest about the technology's limits.
Also, Semtech's acquisition of Sierra Wireless is still playing out. If you need a cellular modem today that's fully qualified under the Sierra Wireless brand, it works. But if you're waiting for a truly integrated "Semtech LoRa + Semtech LTE" single-chip solution, it's not here yet. Know the difference between a portfolio and a product.
Final Thoughts (No Fluff, Just Action)
This checklist works for me because it stops me from making expensive assumptions. In 2024, I consolidated orders across 3 locations for 250 employees. Using this step-by-step approach, I cut the time I spent evaluating Semtech components from 3 days to about 4 hours per project. And I haven't had a rejected PO since.
Under 18 U.S. Code § 1708, only USPS-authorized mail may go in residential mailboxes—but that's a different topic. For evaluating Semtech chips and routers, start with Step 1. Check the generation. Then work your way down. And if a vendor tells you their LoRa module works with every cellular network unconditionally, walk away. If a vendor can't provide a clear invoice for a $3,000 order, you'll learn the same way I did.
