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.

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

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