This paper presents a single-chip implementation and evaluation of a passive ultra-high frequency (UHF) RFID tag that uses hash-based mutual authentication protocol. Implementation details of the silicon chip including analog power block, analog clock block, cryptographic block, volatile and non-volatile memory blocks will be introduced as well as the evaluation results of the chip about area, execution time, and power consumption. To the best of our knowledge, this work is the first single-chip implementation and the first feasibility verification of a fully functional passive UHF RFID tag chip running the hash-based mutual authentication protocol with forward privacy-preservation. We expect our experience is helpful for the future design of the privacy-preserving RFID system from both academic and industrial points of view.