Microsemi Corporation has announced the availability of the smallest radio module it has ever produced. TheZL70323is optimized for implantable medical devices such as pacemakers, cardiac defibrillators and neurostimulators—measuring just 5.5mm x 4.5mm x 1.5mm. The new radio module supersedes the company's ZL70321 and complements itsZL70120radio module used for external device controllers. Both modules are based on Microsemi's ultralow power (ULP)ZL70103radio transceiver chip, which supports a high data rate radio frequency (RF) link for medical implantable communication applications.