描述 Description

The IDT7027 is a high-speed 32K x 16 Dual-Port Static RAM, designed to be used as a stand-alone 512K-bit Dual-Port RAM or as a combination MASTER/SLAVE Dual-Port RAM for 32-bit-or-more word systems. Using the IDT MASTER/SLAVE Dual-Port RAM approach in 32-bit or wider memory system applications results in full-speed, error-free operation without the need for additional discrete logic.

特性 Features

◆ True Dual-Ported memory cells which allow simultaneous

access of the same memory location

◆ High-speed access

– Military: 25/35/55ns (max)

– Industrial: 25ns (max.)

– Commercial: 20/25/35/55ns (max.)

◆ Low-power operation

– IDT7027S

Active: 750mW (typ.)

Standby: 5mW (typ.)

– IDT7027L

Active: 750mW (typ.)

Standby: 1mW (typ.)

◆ Separate upper-byte and lower-byte control for bus

matching capability.

◆ Dual chip enables allow for depth expansion without

external logic

◆ IDT7027 easily expands data bus width to 32 bits or more

using the Master/Slave select when cascading more than

one device

◆ M/S = VIH for BUSY output flag on Master,

M/S = VIL for BUSY input on Slave

◆ Busy and Interrupt Flags

◆ On-chip port arbitration logic

◆ Full on-chip hardware support of semaphore signaling

between ports

◆ Fully asynchronous operation from either port

◆ TTL-compatible, single 5V (±10) power supply

◆ Available in 100-pin Thin Quad Flatpack (TQFP) and 108-pin

Ceramic Pin Grid Array (PGA)

◆ Industrial temperature range (–40°C to +85°C) is available

for selected speeds