General Description

The 9403A is an expandable fall-through type high-speed First-In First-Out (FIFO) Buffer Memory optimized for high speed disk or tape controllers and communication buffer applications. It is organized as 16-words by 4-bits and may be expanded to any number of words or any number of bits in multiples of four. Data may be entered or extracted asynchronously in serial or parallel, allowing economical implementation of buffer memories.

The 9403A has 3-STATE outputs which provide added versatility and is fully compatible with all TTL families.

Features

■ Serial or parallel input

■ Serial or parallel output

■ Expandable without external logic

■ 3-STATE outputs

■ Fully compatible with all TTL families

■ Slim 24-pin package