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/

The 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
  • 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)