IDT71342LA

Integrated Device Technology, Inc. HIGH-SPEED 4K x 8 DUAL-PORT STATIC RAM WITH SEMAPHORE IDT71342SA/LA FEATURES: High-speed access — Commercial: 20/25/35/45/55/70ns (max.) Low-power operation — IDT71342SA Active: 500mW (typ.) Standby: 5mW (typ.) — IDT71342LA Active: 500mW (typ.) Standby: 1mW (typ.) Fully asynchronous operation from either port Full on-chip hardware support of semaphore signalling between ports Battery backup operation—2V data retention TTL-compatible; single 5V (±10%) power supply Available in plastic packages Industrial temperature range (–40°C to +85°C) is avail- able, tested to military electrical specifications DESCRIPTION: The IDT71342 is an extremely high-speed 4K x 8 Dual-Port Static RAM with full on-chip hardware support of semaphore signalling between the two ports. The IDT71342 provides two independent ports with separate control, address, and I/O pins that permit independent, asynchronous access for reads or writes to any location in memory. To assist in arbitrating between ports, a fully independent semaphore logic block is provided. This block contains unassigned flags which can be accessed by either side; however, only one side can control the flag at any time. An automatic power down feature, controlled by CE and SEM, permits the on-chip circuitry of each port to enter a very low standby power mode (both CE and SEM High). Fabricated using IDT’s CMOS high-performance technology, this device typically operates on only 500mW of...