DM7556 Datasheet PDF - National Semiconductor TRI-STATE Programmable Binary Counters Specs

DM7556 - TRI-STATE Programmable Binary Counters

Datasheet Summary

Description

These circuits are synchronous edge-sensitive fully-programmable 4-bit counters The counters feature both conventional totem-pole and TRI-STATE outputs such that when the outputs are in the high impedance mode they can be used to enter data from the bus lines In addition the clear input operates com

Features

Y Y Y Y Y Typical clock frequency 35 MHz TRI-STATE outputs Fully independent clear Synchronous loading Cascading circuitry provided internally Connection Diagram Dual-In-Line Package TL F 6588.
1 Order Number DM7556J or DM8556N See NS Package Number J16A or N16A Function Table Control Inputs LOAD H H H H L H H CE X X X X H L L CLK X X L L OD L H L H L L H Reset H H L L L L L I OA L Z QA0 Z a Z I O Ports I OB I OC I OD L Z QD0 Z d Z QA L L QA0 QA0 A Active Outputs QB QC QD L L QD0 Q.

Datasheet Details

Part number	DM7556
Manufacturer	National Semiconductor
File Size	150.04 KB
Description	TRI-STATE Programmable Binary Counters
Datasheet	DM7556 Datasheet
Additional preview pages of the DM7556 datasheet.

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Full PDF Text Transcription

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DM7556 DM8556 TRI-STATE Programmable Binary Counters August 1989 DM7556 DM8556 TRI-STATE Programmable Binary Counters General Description These circuits are synchronous edge-sensitive fully-programmable 4-bit counters The counters feature both conventional totem-pole and TRI-STATE outputs such that when the outputs are in the high impedance mode they can be used to enter data from the bus lines In addition the clear input operates completely independent of all other inputs During the programming operation data is loaded into the flip-flops on the positive-going edge of the clock pulse To facilitate cascading of these counters the MAX COUNT output can be tied directly into the count enable input of the next counter Features Y Y Y Y Y Typical clock frequency 35 MHz TRI-STATE outputs Full

Published: Feb 27, 2006 |