DESCRIPTION

The IDT7MPV6253/55/56 modules belong to a family of secondary caches intended for use with PowerPC CPUbased systems. The IDT7MPV6253 uses IDT’s 71V256 32K The IDT logo is a registered trademark of Integrated Device Technology, Inc. PowerPC is a trademark of IBM. Computerbus is trademark of Burndy. 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.

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.