CYRF8935_13 Datasheet, PDF (1/40 Pages) Cypress Semiconductor – WirelessUSB™-NL 2.4 GHz Low Power Radio

CYRF8935
WirelessUSB™-NL 2.4 GHz
Low Power Radio
WirelessUSB™-NL 2.4 GHz Low Power Radio
Features
■ Fully integrated 2.4-GHz radio on a chip
■ 1-Mbps over-the-air data rate
■ Transmit power typical: 0 dBm
■ Receive sensitivity typical: –87 dBm
■ 1 µA typical ^[1] current consumption in sleep state
■ Closed-loop frequency synthesis
■ Supports frequency-hopping spread spectrum
■ On-chip packet framer with 64-byte first in first out (FIFO) data
buffer
■ Built-in auto-retry-acknowledge protocol simplifies usage
■ Built-in cyclic redundancy check (CRC), forward error
correction (FEC), data whitening
■ Supports DC ~ 12-MHz SPI bus interface
■ Additional outputs for interrupt request (IRQ) generation
■ Digital readout of received signal strength indication (RSSI)
■ 4 × 4 mm quad flat no-leads (QFN) package, bare die, or wafer
sales
Product Description
WirelessUSB™-NL, optimized to operate in the 2.4-GHz ISM
band, is Cypress's third generation of 2.4-GHz low-power RF
technology, bringing the next level of low-power performance
into a small 4-mm × 4-mm footprint. WirelessUSB-NL
implements a Gaussian frequency-shift keying (GFSK) radio
using a differentiated single-mixer, closed-loop modulation
design that optimizes power efficiency and interference
immunity. Closed-loop modulation effectively eliminates the
problem of frequency drift, enabling WirelessUSB-NL to transmit
up to 255-byte payloads without repeatedly having to pay power
penalties for re-locking the phase locked loop (PLL) as in
open-loop designs.
Among the advantages of WirelessUSB-NL are its fast lock times
and channel switching, along with the ability to transmit larger
payloads. Use of longer payload packets, compared to multiple
short payload packets, can reduce overhead, improve overall
power efficiency, and help alleviate spectrum crowding.
Combined with Cypress's enCoRe™ family of USB and wireless
microcontrollers, WirelessUSB-NL also provides the lowest bill
of materials (BOM) cost solution for PC peripheral applications
such as wireless keyboards and mice, as well as best-in-class
wireless performance in other demanding applications such as
toys, remote controls, fitness, automation, presenter tools, and
gaming.
Applications
■ Wireless keyboards and mice
■ Handheld remote controls
■ Wireless game controllers
■ Hobby craft control links
■ Home automation
■ Industrial wireless links and networks
■ Cordless audio and low-rate video
Note
1. Typical values are included for reference only and are not guaranteed or tested. Typical values are measured at V_IN = 3 VDC, Ta = +25 °C.
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 001-61351 Rev. *J
• San Jose, CA 95134-1709 • 408-943-2600
Revised June 21, 2013