DS3647A - Quad Tri-state MOS Memory I/o Register

Product Overview

National Semiconductor Corporation

Datasheet Details

Part number	DS3647A
Manufacturer	National Semiconductor Corporation
File Size	166.48 KB
Description	Quad Tri-state MOS Memory I/o Register
Datasheet	DS3647A Datasheet
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Product details

Description

The DS3647A is a 4-bit I O buffer register intended for use in MOS memory systems This circuit employs a fall-through latch for data storage This method of latching captures the data in parallel with the output thus eliminating the delays encountered in other designs This circuit uses Schottkyclamped transistor logic for minimum propagation delay and employs PNP input transistors so that input currents are low allowing a large fan-out for this circuit which is needed in a memory system Two pins

Features

TRI-STATE outputs The ‘‘B’’ port outputs are designed for use in bus organized data transmission systems and can sink 80 mA and source b5 2 mA Data going from port ‘‘A’’ to port ‘‘B’’ and from ‘‘B’’ to port ‘‘A’’ is inverted in the DS3647A Features Y Y Y Y Y Y Y Y PNP inputs minimize loading Fall-through latch design Propagation delay of only 15 ns TRI-STATE outputs.

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Published: Jul 26, 2009 |