描述 Description

The IDT7025 is a high-speed 8K x 16 Dual-Port Static RAM. The IDT7025 is designed to be used as a stand-alone 128K-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, errorfree operation without the need for additional discrete logic.

Features

◆ True Dual-Ported memory cells which allow simultaneous

reads of the same memory location

◆ High-speed access

– Military: 20/25/35/55/70ns (max.)

– Industrial: 55ns (max.)

– Commercial: 15/17/20/25/35/55ns (max.)

◆ Low-power operation

– IDT7025S

Active: 750mW (typ.)

Standby: 5mW (typ.)

– IDT7025L

Active: 750mW (typ.)

Standby: 1mW (typ.)

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

bus compatibility

◆ IDT7025 easily expands data bus width to 32 bits or more

using the Master/Slave select when cascading more than

one device

◆ M/S = H for BUSY output flag on Master

M/S = L for BUSY input on Slave

◆ Interrupt Flag

◆ On-chip port arbitration logic

◆ Full on-chip hardware support of semaphore signaling

between ports

◆ Fully asynchronous operation from either port

◆ Battery backup operation—2V data retention

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

◆ Available in 84-pin PGA, Flatpack, PLCC, and 100-pin Thin

Quad Flatpack

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

for selected speeds