The MPC7455 and MPC7445 are implementations of the PowerPCTM microprocessor family of reduced instruction set computer (RISC) microprocessors. This document is primarily concerned with the MPC7455; however, unless otherwise noted, all information here also applies to the MPC7445. This document describes pertinent electrical and physical characteristics of the MPC7455. For functional characteristics of the processor, refer to the MPC7450 RISC Microprocessor Family User's Manual. To locate any published updates for this document, refer to the website at http://www.freescale.com.