WIRELESS & SENSING
SX1235 Transceiver
EN300 220 Category 1 Compliant Transceiver
SX1235
DATASHEET
GENERAL DESCRIPTION
The SX1235 is a highly integrated RF transceiver optimized
for operation compliant with ETSI EN 300 220 receiver
category 1. In conjunction with an external SAW filter the
SX1235 is designed to pass the category 1 testing with
substantial regulatory margin, simplifying end-user
production test requirements. The SX1235 retains the
highly integrated architecture of the SX123x family,
minimizing external components while delivering the highest
level of performance. For hybrid systems with non
category 1 elements within an alarm system the SX1235
offers the advantage of programmable narrow-band and
wide-band communication modes without the need tomodify
external components. This makes the SX1235 suitable for
integrated home automation, security and alarm systems
that require legacy compatibility.
APPLICATIONS
Category 1 Social Alarm Systems
Category 1 Fire, Smoke and Toxic Gas Detection
Category 1 Lone Worker Systems
Home and Building Automation
Wireless Alarm and Security Systems
Industrial Monitoring and Control
MARKETS
Optimised for the EN 300-220-1 Category 1
North America: FCC Part 15 and Japan: ARIB T-108
KEY PRODUCT FEATURES
High sensitivity: down to -123 dBm at 1.2 kbps
High selectivity: 60 dB typ. ACR
High linearity: 50 dB typ. of adjacent channel saturation
80 dB Blocking immunity, 100 dB with SAW
Image rejection of over 45 dB
Low current: Rx = 9.3 mA, 100nA register retention
Programmable output power +20 dBm in 1 dB steps
Optional high efficiency or fully regulated PA connections
for reliable M2M performance and optimal battery
lifetime
Voltage operation from 1.8 to 3.7 V
Narrowband integrated synthesizer with a resolution of
61 Hz
FSK, GFSK, MSK, GMSK and OOK modulation
Automated, fast frequency correction & timing recovery
Over 115 dB Dynamic Range RSSI
Packet engine with CRC 64 byte FIFO
Preamble and RSSI based channel activity detection
ORDERING INFORMATION
Part Number Package Delivery
SX1235IMLTRT QFN24
Tape &
Reel
MOQ /
Multiple
3000 pieces
Rev 1 - December 2012
Page 1
www.semtech.com