CYRF7936
2.4 GHz CyFi™ Transceiver
Features
■ 2.4 GHz Direct Sequence Spread Spectrum (DSSS) Radio
Transceiver
■ Operates in the unlicensed worldwide Industrial, Scientific,
and Medical (ISM) band (2.400 GHz to 2.483 GHz)
■ 21 mA Operating Current (Transmit at –5 dBm)
■ Transmit Power Up to +4 dBm
■ Receive Sensitivity up to –97 dBm
■ Sleep Current less than 1 µA
■ DSSS Data Rates up to 250 kbps, GFSK Data Rate of 1 Mbps
■ Low External Component Count
■ Auto Transaction Sequencer (ATS) - no MCU intervention
■ Framing, Length, CRC16, and Auto ACK
■ Power Management Unit (PMU) for MCU
■ Fast Startup and Fast Channel Changes
■ Separate 16 byte Transmit and Receive FIFOs
■ Dynamic Data Rate Reception
■ Receive Signal Strength Indication (RSSI)
■ Serial Peripheral Interface (SPI) Control while in Sleep Mode
■ 4 MHz SPI Microcontroller Interface
■ Battery Voltage Monitoring Circuitry
■ Supports Coin-Cell Operated Applications
■ Operating Voltage from 1.8V to 3.6V
■ Operating Temperature from 0 to 70°C
■ Space Saving 40-pin QFN 6x6 mm Package
Applications
■ Wireless Sensor Networks
■ Wireless Actuator Control
■ Home Automation
■ White Goods
■ Commercial Building Automation
■ Automatic Meter Readers
■ Precision Agriculture
■ Remote Controls
■ Consumer Electronics
■ Personal Health and Fitness
■ Toys
Applications Support
See www.cypress.com for development tools, reference
designs, and application notes.
Logic Block Diagram
VREG VDD
VCC PACTL
L/D
VBAT
VIO
IRQ
SS#
SCK
MISO
MOSI
PMU
SPI
CyFi Radio Modem
Data
Interface
and
Sequencer
DSSS
Baseband
& Framer
RSSI
GFSK
Modulator
GFSK
Demodulator
RST
Xtal Osc
Synthesizer
XTAL XOUT
GND
RFP
RFN
RFBIAS
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 001-48013 Rev*B
• San Jose, CA 95134-1709 • 408-943-2600
Revised March 11, 2009
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