VS12G422T

The VS12G422T has the following features including 256 words by 4-bit static RAM for cache and control store applications;Very fast: Choice of 4, 5, and 6 ns maximum address access times;TTL compatible inputs and outputs;Single +5.0 Volt power supply Very low sensitivity to radiation;Standard 22-pin DIP;Fully static operation-equal access and cycle times;Pin compatible with standard silicon -422 and -122 products.

The Vitesse VS12G422T is a very high speed, fully decoded 1024-bit read write static random access memory organized as 256 words by 4 bits. All inputs and outputs of this RAM are TTL compatible and operation is from a standard +5.0 Volt power supply.Fully static asynchronous internal circuits are used,which require no clocks or refreshing for operation. Memory expansion is provided by an active LOW chip select input (CSI), an active HIGH chip select input (CS2)and three-state out-puts. Due to its static operation, the VS12G422T offers equal read and write cycle times, which further simplifies system design.Stresses listed under 'Absolute Maximum Ratings"may be applied to devices one at a time causing permanent damage. Functionality at or above the values listed is not implied. Exposure to these v,extended periods may affect device reliability.

The products VS12G422T described in this document are designed, developed and manufactured as contemplated for general use, including without limitation, ordinary industrial use, general office use, personal use, and household use, but are not designed, developed and manufactured as contemplated (1) for any use that includes fatal risks or dangers that, unless extremely high safety is secured, could have a serious effect to the public, and could lead directly to death, personal injury, severe physical damage or other loss (i.e., nuclear reaction control in nuclear facility, aircraft flight control, air traffic control, mass transport control, medical life support system, missile launch control in weapon system), or (2) for any use where chance of failure is intolerable (i.e., submersible repeater and artificial satellite).