SI4455 Datasheet, PDF (1/40 Pages) Silicon Laboratories – 20-Pin 3x3 mm QFN package

Si4455
EASY-TO-USE, LOW-CURRENT OOK/(G)FSK SUB-GHZ
TRANSCEIVER
Features
 Frequency
 Max data rate = 500 kbps
range = 283–960 MHz
 Power supply = 1.8 to 3.6 V
 Receive
 TX and RX 64 byte FIFOs
sensitivity = –116 dBm
 Automatic frequency control (AFC)
 Modulation
 Automatic gain control (AGC)
(G)FSK
 Integrated battery voltage sensor

OOK
Max output power = +13 dBm ^
Packet handling including
preamble, sync word detection, and
 Low active power consumption _CRC
10 mA RX
 Low BOM

18 mA TX @ +10 dBm
Low standby current = 50 nA

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-GHz
EZRadio^® transceiver. 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 Si4455 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 50 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 Si4455 makes
realizing this performance in an application easy. Design simplicity is
further exemplified in the Wireless Development Suite (WDS) user
interface module. This configuration module provides simplified
programming options for a broad range of applications in an easy to use
format that results in both a faster and lower risk development. The
Si4455 is capable of supporting major worldwide regulatory standards
such as FCC, ETSI, ARIB and China regulatory standards.
Pin Assignments
GND 1 20 19 18 17 16 nSEL
SDN 2
15 SDI
RXp 3
RXn 4
Si4455
14 SDO
13 SCLK
TX 5
12 nIRQ
GND 6 7 8 9 10 11 GPIO1
Patents pending
Rev 1.1 10/13
Copyright © 2013 by Silicon Laboratories
Si4455