The IDT7M1001/IDT7M1003 is a 128K x 8/64K x 8 highspeed CMOS Dual-Port Static RAM module constructed on a multilayer ceramic substrate using eight IDT7006 (16K x 8) Dual-Port RAMs and two IDT FCT138 decoders or depopulated using only four IDT7006s and two decoders. This module provides two independent ports with separate control, address, and I/O pins that permit independent and asynchronous access for reads or writes to any location in memory. System performance is enhanced by facilitating port-to-port communication via semaphore (SEM) "handshake" signaling. The IDT7M1001/1003 module is designed to be used as stand-alone Dual-Port RAM where on-chip hardware port arbitration is not needed. It is the users responsibility to ensure data integrity when simultaneously accessing the same memory location from both ports. The IDT7M1001/1003 module is packaged on a multilayer co-fired ceramic 64-pin DIP (Dual In-line Package) with dimensions of only 3.2" x 0.62" x 0.38". Maximum access times as fast as 35ns over the commercial temperature range are available.