Semtech

Semtech Corporation Manufacturer Skill

MPN Structure

Semtech has several product lines with different MPN structures:

LoRa Transceivers

SX[SERIES][VARIANT]-[PACKAGE]
   |   |      |        |
   |   |      |        +-- Package (QFN, etc.)
   |   |      +-- Variant (frequency band, features)
   |   +-- Series (127x, 126x, 130x)
   +-- Semtech Transceiver prefix

LR11xx Series (Newest LoRa)

LR[SERIES][VARIANT]-[PACKAGE]
   |   |      |        |
   |   |      |        +-- Package code
   |   |      +-- Variant (GNSS, features)
   |   +-- Series (1110, 1120, 1121)
   +-- Long Range prefix

ESD Protection

[FAMILY][SPEC][PACKAGE]
   |       |      |
   |       |      +-- Package suffix (P=SOT-23, T=SC70)
   |       +-- Clamping voltage/channels
   +-- RCLAMP, SLVU, SM series

Example Decoding

SX1276IMLTRT
|  |   |  ||
|  |   |  |+-- T = Tape and Reel
|  |   |  +-- R = Reel packaging
|  |   +-- IMLT = IMLT package
|  +-- 1276 = 868/915 MHz transceiver
+-- SX = Semtech Transceiver

RCLAMP0524P
|     |   |
|     |   +-- P = SOT-23 package
|     +-- 0524 = 5V, 24A clamp
+-- RCLAMP = Rail clamp ESD protection

Product Families

LoRa Transceivers - SX127x (Legacy)

LoRa Transceivers - SX126x (Current)

LoRa Gateway Chips - SX130x

LoRa Edge - LR11xx

LLCC68 (Low-Cost LoRa)

ESD Protection Products

RCLAMP Series

Rail clamp ESD protection for high-speed interfaces.

SLVU Series

TVS diode arrays for data lines.

SM Series

TVS protection diodes.

Package Codes

ESD Part Package Suffixes

// Package embedded in MPN suffix
RCLAMP0524P -> P = SOT-23
RCLAMP0524T -> T = SC70

Signal Integrity Products

ClearEdge Series

Power Management

SC Series

SY Series (Former Micrel)

Handler Implementation Notes

Series Extraction

// LoRa transceivers - extract full series (6 chars)
// SX1276IMLTRT -> SX1276
if (upperMpn.startsWith("SX127")) {
    return extractUpToDigitsOrDash(upperMpn, 6);
}

// ESD protection - extract family name
// RCLAMP0524P -> RCLAMP
if (upperMpn.startsWith("RCLAMP")) {
    return "RCLAMP";
}

Package Code Extraction

// Extract from suffix after last hyphen
// SX1262-QFN24 -> QFN-24

// ESD parts encode package in MPN
// RCLAMP0524P -> P -> SOT-23

Matching Logic

The handler supports multiple component types:

• ComponentType.IC - for all Semtech ICs
• ComponentType.RF_IC_SKYWORKS - for LoRa transceivers (RF)
• ComponentType.ESD_PROTECTION_NEXPERIA - for ESD protection devices

Series Compatibility

LoRa Transceiver Compatibility

SX127x family - NOT compatible with SX126x (different API)
SX1261 <-> SX1262 - Compatible (different power output)
SX1262 <-> SX1268 - Compatible for overlapping frequencies
SX1302 <-> SX1303 - Gateway chips, compatible
LR11xx family - Compatible within family

Handler isOfficialReplacement() Logic

// Same series with different packages are compatible
// SX1261 and SX1262 are compatible (power difference)
// SX1302 and SX1303 are compatible (gateway chips)
// LR11xx series are compatible within family
// Different generations (SX127x vs SX126x) are NOT directly compatible

Related Files

• Handler: manufacturers/SemtechHandler.java
• Component types: IC, RF_IC_SKYWORKS, ESD_PROTECTION_NEXPERIA

Common MPNs

Applications

• LoRaWAN IoT devices
• Long-range wireless sensors
• Smart meters
• Asset tracking
• LoRa gateways
• ESD protection for USB, HDMI, Ethernet
• Industrial communication (RS-485)

Learnings & Edge Cases

• LoRa vs LoRaWAN: SX chips are transceivers; LoRaWAN is a protocol running on top.
• SX127x vs SX126x API difference: These generations use different register APIs - not drop-in replacements.
• Frequency bands in MPN: Not always explicit - SX1276 supports 868/915, SX1278 supports 433/470.
• IMLT package: Common for LoRa modules, includes matching network.
• ESD protection naming: RCLAMP = rail clamp (fast), SLVU = TVS array.
• Power output difference: SX1261 (+15 dBm) vs SX1262 (+22 dBm) - different power levels, same pinout.
• LR11xx multi-function: These include LoRa + GNSS + WiFi scanning in one chip for geolocation.