1FEATURES
2The LMX5453 is a drop in replacement for the
LMX5452. The LMX5453 has new features
added:
• eSCO
• eSCO over USB HCI transport
• Enhanced scatternet
• Interlaced scan
• Flushing
• Audio PCM slave mode support
• Generic PCM configuration
• Compliant with the Bluetooth 2.0 Core
Specification
• Better than -80 dBm input sensitivity
• Class 2 operation
• Low power consumption:
• Accepts external clock or crystal input:
– Clocking option 12/13 MHz with PLL bypass
mode for power reduction
– 10-20 MHz external clock or crystal network
– Secondary 32.768 kHz oscillator for low-
power modes
– Advanced power management features
• High integration:
– Implemented in 0.18 μm CMOS technology to–
RF includes on-chip antenna filter and
switch
• On-chip firmware with complete HCI
• Embedded ROM (200K) and Patch RAM (16.6K)
memory
• Up to 7 Asynchronous Connection Less (ACL)
links
• Support for two simultaneous voice or
Extended Synchronous Connection Oriented
(eSCO) and Synchronous Connection Oriented
(SCO) and links.
• Enhanced scatternet
• Interlaced scan
• Flushing
• Audio PCM slave mode support
• Generic PCM configuration
• Fractional-N Sigma/Delta modulator
• Operating voltage range 2.5–3.6V
• I/O voltage range 1.6–3.6V
• 60-pad micro-module BGA package (6.1 mm ×
9.1 mm × 1.2 mm)

APPLICATIONS
• Mobile Handsets
• USB Dongles
• Stereo Headsets
• Personal Digital Assistants
• Personal Computers
• Automotive Telematics

DESCRIPTION
The LMX5453 is a highly integrated Bluetooth 2.0 compliant solution. The integrated baseband
controller and 2.4 GHz radio combine to form a
complete, small form-factor (6.1 mm × 9.1 mm × 1.2
mm) Bluetooth node.
The on-chip memory, ROM, and Patch RAM provide
lowest cost and minimize design risk with the
flexibility of firmware upgrades.
The firmware supplied in the on-chip ROM supports a
complete Bluetooth Link Manager and HCI with communication through a UART or USB interface.
This firmware features point-to-point and point-to–
multipoint link management, supporting data rates up
to 723 kbps.
The radio employs an integrated antenna filter and
switch to minimize the number of external
components.
The radio has a heterodyne receiver architecture with
a low intermediate frequency (IF), which enables the
IF filters to be integrated on-chip. The transmitter uses direct IQ-modulation with Gaussian-filtered bit-
stream data, a voltage-controlled oscillator (VCO)
buffer, and a power amplifier.
The LMX5453 module is lead free and RoHS (Restriction of Hazardous Substances) compliant. For
more information on those quality standards, please
visit our green compliance website at **
http://www.national.com/quality/green/