IDT7MPV6255

256KB AND 512KB SECONDARY CACHE MODULES FOR THE PowerPC™ Integrated Device Technology, Inc. IDT7MPV6253 IDT7MPV6255/56 FEATURES For CHRP based PowerPC™ systems. Asynchronous and pipelined burst SRAM options in the same module pinout Low-cost, low-profile card edge module with 178 leads Uses Burndy Computerbus™ connector, part number ELF182KSC-3Z50 Operates with external PowerPC CPU speeds up to 66MHz Separate 5V (±5%) and 3.3V (+10/-5%) power supplies Multiple GND pins and decoupling capacitors for maximum noise immunity Presence Detect output pins allow the system to determine the particular cache configuration. x 8 asynchronous static RAMs and the IDT7MPV6255/56 use IDT’s 71V432 32K x 32 pipelined synchronous burst static RAMs in plastic surface mount packages mounted on a multilayer epoxy laminate (FR-4) board. In addition, each of the modules uses the IDT 71216 16K x 15 Cache-Tag static RAM and IDT FCT logic. Extremely high speeds are achieved using IDT’s high-reliability, low cost CMOS technology. The low profile card edge package allows 178 signal leads to be placed on a package 5.06" long, a maximum of 0.250" thick and a maximum of 1.08" tall. The module space savings versus discrete components allows the OEM to design additional functions onto the system or to shrink the size of the motherboard for reduced cost. All inputs and outputs are LVTTL-compatible, and operate from separate 5V (±5%) and 3.3V (+10/-5%) power supplies. Multiple GND pins and on...