Features

 Frequency

range = 284–960 MHz

 Receive sensitivity = –116 dBm

 Modulation

(G)FSK

OOK

 Max output power = +13 dBm

 Low active power consumption

10 mA RX

18 mA TX @ +10 dBm

 Low standby current = 40 nA

 Low shutdown current = 30 nA

 Preamble sense mode

6 mA average RX current at

1.2 kbps

 Max data rate = 500 kbps

 Power supply = 1.8 to 3.6 V

 TX and RX 64 byte FIFOs

 Automatic frequency control (AFC)

 Automatic gain control (AGC)

 Integrated battery voltage sensor

 Packet handling including preamble,

sync word detection, and CRC

 Low BOM

 20-Pin 3x3 mm QFN package 

Applications

 Remote control

 Home security and alarm

 Telemetry

 Garage and gate openers

Remote keyless entry

 Home automation

 Industrial control

 Sensor networks

 Health monitors

Description

Silicon Laboratories’ Si4455 is an easy-to-use, low current, sub-GHzEZRadio® transceiver. The Si4055 is a transmit-only device, and the Si4355 is a receiver-only device based on the Si4x55 architecture. This data sheet covers all three products with the transmit descriptions being relevant for Si4455 and Si4055 and the receive descriptions being relevant for Si4455

and Si4355. Covering all major bands, it combines plug-and-play simplicity with the flexibility needed to handle a wide variety of applications. The compact 3x3 mm package size combined with a low external BOM count makes the Si4x55 both space efficient and cost effective. The +13 dBm output power and excellent sensitivity of –116 dBm allows for a longer operating range, while the low current consumption of 18 mA TX (at 10 dBm), 10 mA RX, and 40 nA standby, provides for superior battery life. By fully integrating all components from the antenna to the GPIO or SPI interface to

the MCU, the Si4x55 makes it easy to realize this performance in an application. Design simplicity is further exemplified in the Wireless Development Suite (WDS) user interface software. WDS provides simplified programming options for a broad range of applications in an easy-to-use format that results in faster and lower risk development. The Si4x55 is capable of supporting major worldwide regulatory standards, such as FCC, ETSI, ARIB, and China regulatory standards.