Table of Contents
LLCC68 Brings Cost-Effective LoRa to 433/470 MHz
Product Overview: What Is LLCC68?
Key Features and Model Comparison
Technical Specifications
Typical Applications
LLCC68 Brings Cost-Effective LoRa to 433/470 MHz
In scaled LPWAN deployments, the Sub-1G band remains the mainstay of long-range, low-power communication thanks to excellent penetration and diffraction. And the 433 MHz / 470 MHz bands - the most widely used license-free ISM spectrum in China and worldwide - carry massive connectivity demand from smart metering, industrial sensing and home security. EBYTE's E220-400T series, built on Semtech's new-generation LLCC68 LoRa RF chip, spans a complete product gradient from a 22 dBm standard type to a 30 dBm enhanced type, offering a highly cost-effective UART serial solution. This article covers the E220P-400T22S, E220-400T22S, E220-400T22D, E220-400T30D, E220-400TBL-SC, E220-400TBH-SC and E220-900TBL-SC.
Product Overview: What Is LLCC68?
LLCC68 is Semtech's brand-new LoRa RF chip using LoRa spread-spectrum modulation with spreading factors SF5 to SF11. Versus the previous SX1276 generation it offers significantly lower power, higher speed and longer range. Configurable spreading factors and receive bandwidths: SF5-SF9 at BW = 125 kHz, SF5-SF10 at 250 kHz, SF5-SF11 at 500 kHz.
The E220-400T series is a self-developed wireless serial (UART) module based on the LLCC68, operating in the 410.125 - 493.125 MHz band (433.125 MHz default) with TTL-level output compatible with both 3.3 V and 5 V IO. The modules integrate an LNA and an active temperature-compensated crystal, and support air wakeup, carrier sensing (Listen Before Talk), communication keys, packet length settings and custom development services.
Key Features and Model Comparison
Long range with strong interference immunity: new-generation LoRa spread-spectrum reaches 5 - 7 km under ideal conditions with far better interference rejection.
Active crystal, stable across temperatures: models such as the E220P-400T22S add an active TCXO (plus-or-minus 1 PPM) and a receiving limiter, ensuring reliable communication in both high- and low-temperature conditions.
Low-power design: deep sleep draws only about 3.5 uA - ideal for battery-powered solutions.
Multiple transmission modes: fixed-point, broadcast and channel monitoring, with LBT support to listen for channel noise before transmitting.
Parameter retention after power-off: modules resume with saved settings on re-power, paired with an efficient watchdog that auto-restarts on exceptions.
Rich package options: the S series is SMD (16 x 26 mm, IPEX/stamp-hole RF interface), the D series is DIP (21 x 36 mm, SMA-K antenna), and the TBH/TBL test kits enable rapid evaluation.
Feature E220P-400T22S E220-400T22S E220-400T22D E220-400T30D E220-400TBL-SC E220-400TBH-SC E220-900TBL-SC
Chipset LLCC68 LLCC68 LLCC68 LLCC68 LLCC68 LLCC68 LLCC68
Carrier Frequency 433/470 MHz 433/470 MHz 433/470 MHz 433/470 MHz 433/470 MHz 433/470 MHz 868/915 MHz
Tx Power 22 dBm 22 dBm 22 dBm 30 dBm 22 dBm 30 dBm 22 dBm
Test Range 7 km 5 - 7 km 5 km 10 km 5 km 10 km 9 km
Product Type SMD module SMD module DIP module DIP module Test kit Test kit Test kit
Dimensions (mm) 16 x 26 16 x 26 21 x 36 20 x 40.5 - - -
Antenna IPEX / stamp holes IPEX / stamp holes SMA-K SMA-K SMA SMA SMA
Interface UART UART UART UART UART UART UART
Core Positioning LNA + active TCXO + limiter Standard Standard High power 30 dBm Low-power test baseboard High-power test baseboard 900 MHz test baseboard
In short: the E220P-400T22S is the RF-enhanced type - its built-in LNA and active TCXO push ideal range to 7 km versus 5.6 km for the standard E220-400T22S; the E220-400T30D, with 30 dBm output, reaches a 10 km test distance for long-range backbone links; and the E220-400TBL-SC / E220-400TBH-SC are companion test kits for small-power and high-power modules respectively, enabling quick performance validation.
Technical Specifications
Typical values across the E220-400T series: chipset Semtech LLCC68; modulation new-generation LoRa spread spectrum; operating band 410.125 - 493.125 MHz (433.125 MHz default); Tx power 22 / 30 dBm, software-adjustable in multiple steps; data rate 2.4 k - 62.5 kbps; factory defaults c0 00 00 62 00 00 (433.125 MHz / 2.4 kbps / 9600 / 8N1 / 22 dBm); interface UART serial (TTL, compatible with 3.3 V and 5 V IO); crystal 32 MHz (E220P series: active TCXO, plus-or-minus 1 PPM); supply 3.3 - 5.5 V (above 5 V recommended for best performance); sleep current about 3.5 uA (deep sleep); operating temperature -40 C to +85 C (industrial design); configurable packet length 32/64/128/200 bytes; signature features: air wakeup, carrier sensing, communication key, LBT, RSSI, fixed-point / broadcast transmission.
Typical Applications
Home security alarm and remote keyless entry: an anti-interference wireless link for alarm panels, door contacts and more.
Smart home and industrial sensors: long-range, highly stable wireless sensor networks.
Wireless alarm and security systems: for protection scenarios demanding real-time, highly reliable communication.
Building automation solutions: centralized wireless management of lighting, access control and HVAC.
Advanced metering infrastructure (AMI): remote automatic reading of water, electricity and gas meters.
Wireless industrial remote controls: long-distance, low-latency control on the factory floor.
Automotive applications: wireless communication and data exchange between in-vehicle devices.
EBYTE (Chengdu Ebyte Electronic Technology Co., Ltd.) is a leading Chinese supplier of IoT communication and wireless module solutions, headquartered in Chengdu Hi-Tech Zone with a strong in-house R&D team. Its portfolio spans LoRa, Sub-1G, WiFi, Bluetooth, NearLink, ZigBee, GNSS positioning, industrial power and embedded industrial computers. Guided by the philosophy of professionalism, innovation and service, EBYTE delivers high-quality, high-reliability wireless modules and complete solutions to customers worldwide. Disclaimer: this product must not be used in military or life-safety-related scenarios; users bear responsibility for strict compliance with the hardware design and software configuration requirements of the manual.
FAQ
Q: How is LLCC68 different from SX1268?
A: LLCC68 is Semtech's new-generation LoRa RF chip like the SX1268, but with spreading factors limited to SF5-SF11 (SF5-SF9 at 125 kHz BW, SF5-SF10 at 250 kHz, SF5-SF11 at 500 kHz) - a cost-optimized choice that still outperforms the previous SX1276 in power, speed and range.
Q: E220P-400T22S vs E220-400T22S: what does the P add?
A: The P variant is RF-enhanced: it integrates a low-noise amplifier (LNA), an active temperature-compensated crystal (plus-or-minus 1 PPM) and a receiving limiter, extending ideal range to 7 km versus about 5.6 km for the standard model, and ensuring stable communication at temperature extremes.
Q: What is the difference between the S, D and TBx variants?
A: S models are SMD modules (16 x 26 mm, IPEX/stamp-hole RF interface), D models are DIP modules (21 x 36 mm for T22D, 20 x 40.5 mm for T30D, with SMA-K antenna), and the TBL-SC/TBH-SC are test kits (small-power and high-power versions, plus a 900 MHz variant) for quick performance evaluation.
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