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IDT71342SA25PF Datasheet(PDF) 1 Page - Integrated Device Technology |
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IDT71342SA25PF Datasheet(HTML) 1 Page - Integrated Device Technology |
1 / 13 page Integrated Device Technology, Inc. COMMERCIAL TEMPERATURE RANGE OCTOBER 1996 ©1996 Integrated Device Technology, Inc. DSC-2721/4 IDT71342SA/LA HIGH-SPEED 4K x 8 DUAL-PORT STATIC RAM WITH SEMAPHORE 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 power. Low-power (LA) versions offer battery backup data retention capability, with each port typically consuming 200 µW from a 2V battery. The device is packaged in either a 64-pin TQFP, thin quad plastic flatpack, or a 52-pin PLCC. 1 FUNCTIONAL BLOCK DIAGRAM The IDT logo is a registered trademark of Integrated Device Technology, Inc. 6.05 For latest information contact IDT’s web site at www.idt.com or fax-on-demand at 408-492-8391. 2721 drw 01 COLUMN I/O COLUMN I/O MEMORY ARRAY LEFT SIDE ADDRESS DECODE LOGIC RIGHT SIDE ADDRESS DECODE LOGIC CER OER I/O0R - I/O7R A0R- A11R CEL OEL A0L- A11L I/O0L- I/O7L SEMAPHORE LOGIC SEMR SEML R/ WL R/ WR |
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