RF Transmitter IC S1S77100

Feb 26,2025
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Epson developed the S1S77100, an RF transmitter IC for wireless communication transmitters that supports certain frequencies in the ultra-high frequency (UHF) band. The frequencies, selectable via serial interface (SPI) control, can be set from 300 MHz to 465 MHz or from 600 MHz to 930 MHz.

A PLL*1 and power amp*2 are integrated into the 4 mm x 4 mm SQFN package, making it easy to configure wireless transmission functions with an external crystal oscillator. In addition, the low current consumption of 20 nA (typical) in PowerDown mode*3 makes it ideal for small wireless transmitters.

Main Applications

Wireless transmitters for things such as home security equipment, smart meters, restaurant bells, golf cart remote controllers.

Product Features

Selectable frequency range: 300-465 MHz or 600-930 MHz

Small package: 4 mm x 4 mm SQFN package (P-VQFN024-0404-0.50)

Low current consumption: 20 nA, typical, in PowerDown mode (VDD = 3.0 V, Ta = 25℃)

*1:PLL: Abbreviation for phase locked loop, an electronic circuit that produces a desired output frequency to match a clock signal of a specific frequency

•*2:Power amp: A circuit that amplifies a signal, strengthening it for use in audio and wireless communications applications. Power amps need to be combined with a crystal oscillator.

•*3:PowerDown mode: In this product, PowerDown mode is a state in which only the minimum necessary circuits are operated so as to minimize current consumption