BCM4319XKUBGT Datasheet, PDF (43/84 Pages) Cypress Semiconductor – Single-Chip IEEE 802.11™ a/b/g/n MAC/Baseband/ Radio with Integrated SDIO and USB Interfaces

BCM4319 Preliminary Data Sheet
WLAN 802.11 Radio Subsystem
Section 7:WLAN 802.11 Radio Subsystem
The BCM4319 includes an integrated dual-band WLAN RF transceiver that has been optimized to provide low
power, low cost, and robust communications for applications operating in the globally available 2.4 GHz
unlicensed ISM or 5 GHz U-NII bands (but not both simultaneously). With its integrated internal transmit power
amplifiers, it provides full output power per the IEEE 802.11a/b/g/n specifications. Support for optional external
power amplifiers is also provided. The transmit and receive sections include on-chip filtering, mixing, and gain
control functions.
Figure 17: Radio Functional Block Diagram
5 GHz
RF Input
LNA
Phase
Shifter
5 GHz
RF Input
2.4 GHz
RF Input
LNA
LNA
Phase
Shifter
Phase
Shifter
MUX
LPF
LPF
Rx I
To Baseband
Rx Q
2.4 GHz
RF Input
LNA
Phase
Shifter
5 GHz
2.4 GHz
LO
Generation
PLL
5 GHz
2.4 GHz
Reference
Clock
5 GHz
RF Output
2.4 GHz
RF Output
AMP
AMP
MUX
LPF
LPF
Tx I
From Baseband
Tx Q
Calibration
Control Interface
Control Interface
Broadcom^®
April 2, 2014 • 4319-DS05-R
Single-Chip IEEE 802.11™ a/b/g/n MAC/Baseband/Radio
Page 42