BCM43903 Preliminary Data Sheet
Table of Contents
Power Supply Segments............................................................................................................................ 61
GPIO, UART, and JTAG Interfaces DC Characteristics .......................................................................... 61
Section 14: WLAN RF Specifications .............................................................................. 62
Introduction................................................................................................................................................. 62
2.4 GHz Band General RF Specifications................................................................................................. 62
WLAN 2.4 GHz Receiver Performance Specifications ............................................................................ 63
WLAN 2.4 GHz Transmitter Performance Specifications ....................................................................... 66
General Spurious Emissions Specifications ........................................................................................... 67
Transmitter Spurious Emissions Specifications .................................................................................... 67
2.4 GHz Band Spurious Emissions................................................................................................ 67
20-MHz Channel Spacing ...................................................................................................... 67
Receiver Spurious Emissions Specifications ........................................................................................ 68
Section 15: Internal Regulator Electrical Specifications ............................................... 69
Core Buck Switching Regulator................................................................................................................ 69
3.3V LDO (LDO3P3) .................................................................................................................................... 70
CLDO ........................................................................................................................................................... 71
LNLDO ......................................................................................................................................................... 72
BBPLL LDO................................................................................................................................................. 73
Section 16: System Power Consumption........................................................................ 74
WLAN Current Consumption..................................................................................................................... 74
2.4 GHz Mode ....................................................................................................................................... 74
Section 17: SPI Flash Characteristics ............................................................................. 76
SPI Flash Timing......................................................................................................................................... 76
Read-Register Timing ........................................................................................................................... 76
Write-Register Timing............................................................................................................................ 77
Memory Fast-Read Timing.................................................................................................................... 78
Memory-Write Timing............................................................................................................................ 79
SPI Flash Parameters ........................................................................................................................... 80
Section 18: Power-Up Sequence and Timing ................................................................. 81
Sequencing of Reset and Regulator Control Signals ............................................................................. 81
Description of Control Signals............................................................................................................... 81
Control Signal Timing Diagrams............................................................................................................ 82
Section 19: Thermal Information...................................................................................... 83
Package Thermal Characteristics............................................................................................................. 83
Junction Temperature Estimation and PSIJT Versus THETAJC ............................................................. 83
Environmental Characteristics.................................................................................................................. 83
Broadcom®
March 12, 2016 • 43903-DS102-R
Page 6
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