71421LA Overview
Description
The IDT71321/IDT71421 are high-speed 2K x 8 Dual-Port Static RAMs with internal interrupt logic for interprocessor communications. The IDT71321 is designed to be used as a stand-alone 8-bit DualPort Static RAM or as a "MASTER" Dual-Port Static RAM together with the IDT71421 "SLAVE" Dual-Port in 16-bit-or-more word width systems.
Key Features
- High-speed access – Commercial: 20/35/55ns (max.) – Industrial: 25/55ns (max.)
- Low-power operation – IDT71321/IDT71421SA
- Active: 325mW (typ.)
- Standby: 5mW (typ.) – IDT71321/421LA
- Active: 325mW (typ.)
- Standby: 1mW (typ.)
- Two INT flags for port-to-port communications
- MASTER IDT71321 easily expands data bus width to 16-ormore-bits using SLAVE IDT71421
- On-chip port arbitration logic (IDT71321 only)
- BUSY output flag on IDT71321; BUSY input on IDT71421
