Optimized for such implantable medical devices as pacemakers, cardiac defibrillators, and neurostimulators, 5.5 x 4.5 x 1.5 mm ZL70323 implements all RF-related functions needed to deploy implant node in Medical Implantable Communications Service (MICS) RF telemetry system. Components include ZL70103-based, MICS-band RF transceiver; 2.45 GHz wake-up receiver matching network; 24 MHz reference frequency crystal; and decoupling capacitors and series termination resistors.