Also included are muting, audio gain adjust (internal and external), low battery/carrier detect, and a wide range for the
PLL reference frequency. The power supply range is 2.7 to 5.5 V. "A" version
devices have programmable MCU clock out and reference oscillator disable
functions, whereas these functions are always enabled for "B" version
devices.
Complete Expander/Compressor for Superior Noise Rejection
Two PLLs and a LO Suitable for a 900 MHz System
Minimal External Components
Transmit Path Includes Adjustable Gain Amplifier, Filters, Mute,
Compressor with Bypass and Limiter
Receive Path Contains Data Slicer, Adjustable Gain Amplifier, Sidetone
Attenuator, Filters, Expander with Bypass, Mute, Volume Control and
Power Amplifier
Dual A/Ds are Provided to Monitor RSSI and VCC
Independent Power Amplifier with Differential Outputs and Mute
Selectable Frequency for Switched Capacitor Filters, PLLs and the LO
Reference Frequency Source can be a Crystal or System Clock
Serial µP Port to Control Gain, Mute, Frequency Selection, Phase
Detector Gain, Power Down Modes, Low Battery Detect and Others
Power Supply Range: 2.7 to 5.5 V
Power Down Modes for Power Conservation