The Z87000/Z87L00 FHSS Cordless Telephone Transceiver/Controllers are expressly designed to implement a 900 MHz frequency hopping spread spectrum cordless telephone compliant with United States FCC regulations for unlicensed operation. The Z87000 and Z87L00 are distinct 5V and 3.3V versions, respectively, of the device. For the sake of brevity, all subsequent references to the Z87000 in this document also apply to the Z87L00, unless specifically noted.